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SC6-125
KCISE
SC6-125
| Quantity: | |
|---|---|
General
High-Performance Miniature Circuit Breaker: The SC6-125 miniature circuit breaker is designed to provide reliable protection for solar systems with a high breaking capacity of 10ka and a rated current of 125A.
Wide Operating Temperature Range: This product can operate effectively in a wide ambient temperature range of -30°C to +70°C, ensuring reliable performance in various environments.
Compliant with International Standards: The SC6-125 is certified with CE and meets the IEC/EN60947-2 standard, guaranteeing its quality and safety.
Long Service Life: With a mechanical life of 20,000 times, this miniature circuit breaker is designed to provide long-lasting service and minimize maintenance needs.
SC6-125 high breaking capacity circuit breaker is specially for solar PV system. The current is form 80A to 125A and voltage up to
1000VDC. Standard according to IEC/EN60947-2.
| Item | Dc circuit breaker |
| Model Number | SC6-125 |
| Pole | 4P |
| Rated Current(In) | 125A |
| Rated Operating Voltage | DC1000V |
| Standard | IEC/EN60947 |
| Breaking Capacity | 10KA |
| Characteristic Curve | B,C,D |
| Working Temperature | -35℃ to +70℃ |
| Protection Degree | IP40 |
| Installation | 35MM DIN RAIL |
When a solar array is running smoothly, you barely notice it—there’s no drama, no alarms, just steady power. The problem is that electrical faults rarely announce themselves politely. A loose crimp, a damaged cable jacket, or a downstream failure can push current where it doesn’t belong. In a DC circuit, that mistake can linger longer than you expect, building heat inside an enclosure until the plastic smell becomes the first “warning.”
The SC6-125 DC MCB was developed for those quiet moments when protection has to act instantly. The handle has a firm, deliberate click—easy to grip even with gloves—so technicians can isolate and restore confidently. Inside, the design focuses on holding connections tight and managing heat between adjacent devices, helping reduce nuisance trips and hot spots that often show up in crowded PV distribution boxes.
Whether you’re assembling combiner boxes, upgrading protection on string lines, or standardizing a panel build, SC6-125 is built for repeatability: stable tripping behavior, durable mechanics (20,000 operations), and a structure meant to survive transport, installation, and years of service without becoming the weak link in the circuit.
Stops faults before they spread
10kA breaking capacity helps interrupt high fault currents quickly, protecting cables, terminals, and downstream devices.
Holds wiring steady to reduce heat risk
The classic U‑tunnel terminal design is engineered to keep conductors seated firmly, helping minimize micro‑arcing and connection warming caused by vibration or thermal cycling.
Stays dependable in tough ambient conditions
Rated working temperature -35°C to +70°C, suitable for outdoor-adjacent electrical cabinets and variable climates.
Self‑extinguishing thermoplastic housing
Impact-resistant thermoplastic shell with self‑extinguishing behavior supports safer containment during abnormal events.
Less thermal stress in dense panels
Internal airflow/heat-dissipation concept helps reduce temperature buildup between neighboring breakers—important when multiple strings sit side by side.
Choose the response you want
Supports B, C, D trip characteristics; the C curve option is commonly selected to balance inrush tolerance and reliable protection.
Fast, familiar installation
Standard 35mm DIN rail mounting makes layout changes and maintenance more straightforward.
| Item | Specification |
|---|---|
| Product Type | DC circuit breaker / DC miniature circuit breaker (DC MCB) |
| Model Number | SC6-125 |
| Poles | 2P (main configuration); 4P option also available per series table |
| Rated Current (In) | 125A (series current range: 80A–125A) |
| Rated Operating Voltage | DC 550V (common configuration); platform capability up to DC 1000V |
| Breaking Capacity | 10kA |
| Characteristic Curve | B / C / D (C curve highlighted) |
| Standard | IEC/EN 60947-2 |
| Certification | CE |
| Working Temperature | -35°C to +70°C |
| Protection Degree | IP40 |
| Installation | 35mm DIN rail |
| Mechanical Life | 20,000 operations |
SC6-125 is suited for DC protection where stable interruption and repeatable installation matter:
PV string and combiner protection
Helps protect string conductors and upstream equipment from overload and short-circuit conditions.
DC distribution in solar power systems
Useful in distribution boxes where multiple DC branches require coordinated protection.
Panel builders and maintenance teams
DIN-rail form factor supports standardized assembly, quick replacement, and consistent labeling.
Harsh-temperature electrical enclosures
Performance range down to -35°C helps reduce seasonal performance surprises.
Recommended selection approach (practical, engineering-friendly):
Choose 2P when you need two conductors switched/protected together in a compact footprint.
Select the trip curve (B/C/D) based on load behavior and expected inrush conditions (see next section).
Verify system voltage requirements: DC 550V configuration or up to DC 1000V depending on design.
A circuit breaker is not just “on/off.” The trip curve determines how it responds to brief surges versus true faults. SC6-125 supports B, C, and D curves so your protection can match the behavior of the circuit—not fight it.
B Curve
More sensitive to lower overcurrent multiples.
Helps where you want quicker response and loads have minimal inrush.
C Curve (commonly used)
A practical balance: tolerates normal transient surges while still tripping decisively under fault conditions.
Often preferred where switching events or startup surges could otherwise cause nuisance trips.
D Curve
Higher inrush tolerance.
Useful for circuits where short-duration high current is expected, while still maintaining short-circuit protection.
Outcome for you:
Better curve matching can mean fewer nuisance trips, less troubleshooting, and more stable system uptime—especially across many installed units.
SC6-125 focuses on controlling the two things that most often cause field issues: heat and connection integrity.
Self‑extinguishing thermoplastic shell
Designed to resist impact during installation and transport, and to help contain abnormal heating events.
Full inlet / solid structure
Supports a more stable internal arrangement, helping the device feel tight and consistent when operated.
U‑tunnel terminal concept
Built to keep conductors clamped securely. A stable connection reduces resistive heating and lowers the chance of intermittent faults that can be difficult to diagnose.
Airflow / heat reduction between adjacent breakers
Important in packed enclosures where multiple breakers sit shoulder-to-shoulder and heat can accumulate.
Long mechanical life
20,000 operations supports frequent isolation and re-energizing during commissioning and maintenance without “softening” the feel of the mechanism.
A protection device is only as reliable as its installation. SC6-125 is designed to make good practice easy.
Mounting
Clips onto 35mm DIN rail for fast assembly and clean alignment.
Panel layout
In multi-string builds, leaving sensible spacing and planning cable routing helps reduce heat concentration and makes later service quicker.
Wiring stability
Use appropriately sized conductors and consistent stripping length so the terminal clamp engages copper cleanly and evenly.
Service workflow
The ergonomic handle supports confident manual operation, so isolation feels controlled rather than flimsy—useful during commissioning checklists and fault isolation.
Result:
Faster builds, easier audits, and fewer “mystery heat” problems caused by inconsistent wiring practices.
IEC/EN 60947-2 compliance
Aligns with widely recognized requirements for low-voltage switchgear and controlgear, supporting easier project approval and documentation.
CE certification
Demonstrates conformity with applicable EU safety, health, and environmental protection requirements.
For teams that document each panel:
These markings and standards references simplify technical files, inspection preparation, and end-user confidence.
Consistency matters when you’re installing the same protective device again and again.
Mechanical endurance
Rated 20,000 operations, supporting repeated switching and long-term use.
Temperature resilience
Verified working range -35°C to +70°C reduces risk of performance drift in cold mornings and hot enclosures.
Design choices aimed at stability
Heat-reduction structure and robust terminal design support predictable behavior across dense installations.
What this means in practice:
Less rework, fewer callbacks, and fewer units replaced simply because of premature wear or unstable connections.
To help standardize your panels and documentation, SC6-125 can be supplied with practical configuration choices:
Poles: 2P as the primary build; 4P option available for specific panel architectures.
Trip curve: B / C / D (C curve commonly specified).
Current rating: series range 80A–125A; this page focuses on 125A.
Voltage level: DC 550V configuration; series platform up to DC 1000V.
Labeling & packaging
Provide your preferred carton marks, barcode/label format, and documentation needs for smoother receiving and stocking.
If you share your target market and panel schematic, I can also help you generate an ordering code logic that reduces back-and-forth.
Focused product line and clear documentation
The SC6-125 is specified with the key parameters engineers look for: breaking capacity, curve options, temperature range, standard compliance, and service life.
Manufacturing foundation
Production background rooted in Zhejiang, China (established 2003; registered capital ten million yuan per company profile), supporting stable supply and long-term continuity.
Responsive support channels
Direct technical and commercial contact information is provided (phone/WhatsApp/email), making it easier to confirm configuration, labeling, and shipping details.
Designed for repeat installations
Practical details—DIN rail mounting, secure terminals, heat-conscious structure—are chosen to reduce installation variability and field issues.
Q1: Is this SC6-125 a 2-pole or 4-pole breaker?
A: This product is commonly supplied as 2P for solar DC circuits where two conductors are protected/isolated together. The series information also lists a 4P option. Confirm your required pole count during inquiry so the nameplate and packing match your panel design.
Q2: The title mentions 550V, but the specs mention up to 1000VDC. Which one should I use?
A: Use DC 550V as the common configuration referenced in the listing title. The SC6-125 platform is also described as supporting up to DC 1000V in series applications. Always select the version that matches your system voltage and the applicable design rules for your project.
Q3: What trip curve should I choose—B, C, or D?
A: C curve is widely chosen for balanced tolerance to brief surges while still providing reliable protection. B curve suits more sensitive, low-inrush circuits. D curve is for higher inrush conditions. If you share your load profile and wiring length, we can recommend the most appropriate curve.
Q4: Where is this breaker typically installed?
A: It is designed for 35mm DIN rail mounting inside electrical enclosures such as PV distribution/combiner arrangements and related DC protection panels.
Q5: How durable is it for frequent switching during commissioning?
A: The breaker is rated for 20,000 mechanical operations, which supports repeated on/off cycles during testing, commissioning, and maintenance routines.
General
High-Performance Miniature Circuit Breaker: The SC6-125 miniature circuit breaker is designed to provide reliable protection for solar systems with a high breaking capacity of 10ka and a rated current of 125A.
Wide Operating Temperature Range: This product can operate effectively in a wide ambient temperature range of -30°C to +70°C, ensuring reliable performance in various environments.
Compliant with International Standards: The SC6-125 is certified with CE and meets the IEC/EN60947-2 standard, guaranteeing its quality and safety.
Long Service Life: With a mechanical life of 20,000 times, this miniature circuit breaker is designed to provide long-lasting service and minimize maintenance needs.
SC6-125 high breaking capacity circuit breaker is specially for solar PV system. The current is form 80A to 125A and voltage up to
1000VDC. Standard according to IEC/EN60947-2.
| Item | Dc circuit breaker |
| Model Number | SC6-125 |
| Pole | 4P |
| Rated Current(In) | 125A |
| Rated Operating Voltage | DC1000V |
| Standard | IEC/EN60947 |
| Breaking Capacity | 10KA |
| Characteristic Curve | B,C,D |
| Working Temperature | -35℃ to +70℃ |
| Protection Degree | IP40 |
| Installation | 35MM DIN RAIL |
When a solar array is running smoothly, you barely notice it—there’s no drama, no alarms, just steady power. The problem is that electrical faults rarely announce themselves politely. A loose crimp, a damaged cable jacket, or a downstream failure can push current where it doesn’t belong. In a DC circuit, that mistake can linger longer than you expect, building heat inside an enclosure until the plastic smell becomes the first “warning.”
The SC6-125 DC MCB was developed for those quiet moments when protection has to act instantly. The handle has a firm, deliberate click—easy to grip even with gloves—so technicians can isolate and restore confidently. Inside, the design focuses on holding connections tight and managing heat between adjacent devices, helping reduce nuisance trips and hot spots that often show up in crowded PV distribution boxes.
Whether you’re assembling combiner boxes, upgrading protection on string lines, or standardizing a panel build, SC6-125 is built for repeatability: stable tripping behavior, durable mechanics (20,000 operations), and a structure meant to survive transport, installation, and years of service without becoming the weak link in the circuit.
Stops faults before they spread
10kA breaking capacity helps interrupt high fault currents quickly, protecting cables, terminals, and downstream devices.
Holds wiring steady to reduce heat risk
The classic U‑tunnel terminal design is engineered to keep conductors seated firmly, helping minimize micro‑arcing and connection warming caused by vibration or thermal cycling.
Stays dependable in tough ambient conditions
Rated working temperature -35°C to +70°C, suitable for outdoor-adjacent electrical cabinets and variable climates.
Self‑extinguishing thermoplastic housing
Impact-resistant thermoplastic shell with self‑extinguishing behavior supports safer containment during abnormal events.
Less thermal stress in dense panels
Internal airflow/heat-dissipation concept helps reduce temperature buildup between neighboring breakers—important when multiple strings sit side by side.
Choose the response you want
Supports B, C, D trip characteristics; the C curve option is commonly selected to balance inrush tolerance and reliable protection.
Fast, familiar installation
Standard 35mm DIN rail mounting makes layout changes and maintenance more straightforward.
| Item | Specification |
|---|---|
| Product Type | DC circuit breaker / DC miniature circuit breaker (DC MCB) |
| Model Number | SC6-125 |
| Poles | 2P (main configuration); 4P option also available per series table |
| Rated Current (In) | 125A (series current range: 80A–125A) |
| Rated Operating Voltage | DC 550V (common configuration); platform capability up to DC 1000V |
| Breaking Capacity | 10kA |
| Characteristic Curve | B / C / D (C curve highlighted) |
| Standard | IEC/EN 60947-2 |
| Certification | CE |
| Working Temperature | -35°C to +70°C |
| Protection Degree | IP40 |
| Installation | 35mm DIN rail |
| Mechanical Life | 20,000 operations |
SC6-125 is suited for DC protection where stable interruption and repeatable installation matter:
PV string and combiner protection
Helps protect string conductors and upstream equipment from overload and short-circuit conditions.
DC distribution in solar power systems
Useful in distribution boxes where multiple DC branches require coordinated protection.
Panel builders and maintenance teams
DIN-rail form factor supports standardized assembly, quick replacement, and consistent labeling.
Harsh-temperature electrical enclosures
Performance range down to -35°C helps reduce seasonal performance surprises.
Recommended selection approach (practical, engineering-friendly):
Choose 2P when you need two conductors switched/protected together in a compact footprint.
Select the trip curve (B/C/D) based on load behavior and expected inrush conditions (see next section).
Verify system voltage requirements: DC 550V configuration or up to DC 1000V depending on design.
A circuit breaker is not just “on/off.” The trip curve determines how it responds to brief surges versus true faults. SC6-125 supports B, C, and D curves so your protection can match the behavior of the circuit—not fight it.
B Curve
More sensitive to lower overcurrent multiples.
Helps where you want quicker response and loads have minimal inrush.
C Curve (commonly used)
A practical balance: tolerates normal transient surges while still tripping decisively under fault conditions.
Often preferred where switching events or startup surges could otherwise cause nuisance trips.
D Curve
Higher inrush tolerance.
Useful for circuits where short-duration high current is expected, while still maintaining short-circuit protection.
Outcome for you:
Better curve matching can mean fewer nuisance trips, less troubleshooting, and more stable system uptime—especially across many installed units.
SC6-125 focuses on controlling the two things that most often cause field issues: heat and connection integrity.
Self‑extinguishing thermoplastic shell
Designed to resist impact during installation and transport, and to help contain abnormal heating events.
Full inlet / solid structure
Supports a more stable internal arrangement, helping the device feel tight and consistent when operated.
U‑tunnel terminal concept
Built to keep conductors clamped securely. A stable connection reduces resistive heating and lowers the chance of intermittent faults that can be difficult to diagnose.
Airflow / heat reduction between adjacent breakers
Important in packed enclosures where multiple breakers sit shoulder-to-shoulder and heat can accumulate.
Long mechanical life
20,000 operations supports frequent isolation and re-energizing during commissioning and maintenance without “softening” the feel of the mechanism.
A protection device is only as reliable as its installation. SC6-125 is designed to make good practice easy.
Mounting
Clips onto 35mm DIN rail for fast assembly and clean alignment.
Panel layout
In multi-string builds, leaving sensible spacing and planning cable routing helps reduce heat concentration and makes later service quicker.
Wiring stability
Use appropriately sized conductors and consistent stripping length so the terminal clamp engages copper cleanly and evenly.
Service workflow
The ergonomic handle supports confident manual operation, so isolation feels controlled rather than flimsy—useful during commissioning checklists and fault isolation.
Result:
Faster builds, easier audits, and fewer “mystery heat” problems caused by inconsistent wiring practices.
IEC/EN 60947-2 compliance
Aligns with widely recognized requirements for low-voltage switchgear and controlgear, supporting easier project approval and documentation.
CE certification
Demonstrates conformity with applicable EU safety, health, and environmental protection requirements.
For teams that document each panel:
These markings and standards references simplify technical files, inspection preparation, and end-user confidence.
Consistency matters when you’re installing the same protective device again and again.
Mechanical endurance
Rated 20,000 operations, supporting repeated switching and long-term use.
Temperature resilience
Verified working range -35°C to +70°C reduces risk of performance drift in cold mornings and hot enclosures.
Design choices aimed at stability
Heat-reduction structure and robust terminal design support predictable behavior across dense installations.
What this means in practice:
Less rework, fewer callbacks, and fewer units replaced simply because of premature wear or unstable connections.
To help standardize your panels and documentation, SC6-125 can be supplied with practical configuration choices:
Poles: 2P as the primary build; 4P option available for specific panel architectures.
Trip curve: B / C / D (C curve commonly specified).
Current rating: series range 80A–125A; this page focuses on 125A.
Voltage level: DC 550V configuration; series platform up to DC 1000V.
Labeling & packaging
Provide your preferred carton marks, barcode/label format, and documentation needs for smoother receiving and stocking.
If you share your target market and panel schematic, I can also help you generate an ordering code logic that reduces back-and-forth.
Focused product line and clear documentation
The SC6-125 is specified with the key parameters engineers look for: breaking capacity, curve options, temperature range, standard compliance, and service life.
Manufacturing foundation
Production background rooted in Zhejiang, China (established 2003; registered capital ten million yuan per company profile), supporting stable supply and long-term continuity.
Responsive support channels
Direct technical and commercial contact information is provided (phone/WhatsApp/email), making it easier to confirm configuration, labeling, and shipping details.
Designed for repeat installations
Practical details—DIN rail mounting, secure terminals, heat-conscious structure—are chosen to reduce installation variability and field issues.
Q1: Is this SC6-125 a 2-pole or 4-pole breaker?
A: This product is commonly supplied as 2P for solar DC circuits where two conductors are protected/isolated together. The series information also lists a 4P option. Confirm your required pole count during inquiry so the nameplate and packing match your panel design.
Q2: The title mentions 550V, but the specs mention up to 1000VDC. Which one should I use?
A: Use DC 550V as the common configuration referenced in the listing title. The SC6-125 platform is also described as supporting up to DC 1000V in series applications. Always select the version that matches your system voltage and the applicable design rules for your project.
Q3: What trip curve should I choose—B, C, or D?
A: C curve is widely chosen for balanced tolerance to brief surges while still providing reliable protection. B curve suits more sensitive, low-inrush circuits. D curve is for higher inrush conditions. If you share your load profile and wiring length, we can recommend the most appropriate curve.
Q4: Where is this breaker typically installed?
A: It is designed for 35mm DIN rail mounting inside electrical enclosures such as PV distribution/combiner arrangements and related DC protection panels.
Q5: How durable is it for frequent switching during commissioning?
A: The breaker is rated for 20,000 mechanical operations, which supports repeated on/off cycles during testing, commissioning, and maintenance routines.
