GYM10-DC 6-63A 1P-4P DC Miniature Circuit Breaker
GYM10H-DC 6-63A DC Miniature Circuit Breaker 1000V 1P-4P DC circuit protection device designed for photovoltaic systems, energy storage, telecom and DC distribution applications. Provides reliable overload and short-circuit protection with high-performance DC arc extinguishing technology.
•DC dedicated circuit breaker
•Up to 1000VDC 63A
•1P / 2P / 3P / 4P poles available
•IEC/EN 60947-2, GB/T 14048.2 compliant
•Breaking Capacity: 4.5kA
•DC arc extinguishing chamber for safe interruption
•Contact position indication function
•Suitable for PV, ESS and telecom DC systems
Product Description
The GYM10-DC 6-63A 1P-4P DC Miniature Circuit Breaker is specially designed for direct current protection applications, providing reliable overload protection, short-circuit protection, and electrical isolation for solar photovoltaic systems, battery energy storage systems, telecom power systems, and DC distribution equipment.
With a rated current range from 6A to 63A and flexible pole configurations including 1P, 2P, 3P, and 4P, the GYM10-DC DC MCB supports DC voltage applications up to 1000V DC, making it an ideal protection solution for modern renewable energy and industrial DC power systems.
Unlike traditional AC miniature circuit breakers, the GYM10-DC is optimized for DC circuits with a dedicated DC arc extinguishing chamber and magnetic blow-out technology, which effectively improves arc interruption performance and ensures safer operation under DC fault conditions.
The circuit breaker adopts a compact 35mm DIN rail mounting design, allowing quick installation inside solar combiner boxes, electrical cabinets, battery storage systems, and DC distribution panels. Its modular structure also supports optional accessories including auxiliary contacts, alarm contacts, and remote operating mechanisms for flexible system integration.
Designed according to IEC/EN 60947-2 and GB/T 14048.2 standards, the GYM10-DC provides stable electrical performance, long service life, and dependable protection for photovoltaic, energy storage, telecommunications, and industrial DC applications.
Technical Parameter
Technical Parameters & Specifications
| Parameter | Specification |
|---|---|
| Model | GYM10-DC (Also Marked GYM10H-DC) |
| Product Type | DC Miniature Circuit Breaker (DC MCB) |
| Standards | IEC/EN 60947-2, GB/T 14048.2 |
| Rated Current (In) | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Rated Voltage (Ue) | 1P: 250VDC 2P: 500VDC 3P: 750VDC 4P: 1000VDC |
| Rated Insulation Voltage (Ui) | 500V |
| Rated Impulse Withstand Voltage (Uimp) | 4kV |
| Breaking Capacity (Icu) | 4.5kA |
| Tripping Curves | B Curve: (6 ± 20%) × In C Curve: (8.5 ± 20%) × In D Curve: (12 ± 20%) × In |
| Number of Poles | 1P / 2P / 3P / 4P |
| Mechanical Life | 20,000 Operations |
| Electrical Life | 4,000 Operations |
| Tightening Torque | 2.0 N·m |
| Wiring Capacity | 0.5 – 25 mm² |
| Protection Class | IP20 |
| Arc Extinguishing System | 11-fin Cross DC Arc Chute + Magnetic Blow-out Design |
| Mounting | 35mm Standard DIN Rail Mounting |
| Environmental Compliance | RoHS 2.0 Compliant |
| Indicator | Contact Position Indication Window |
| Wiring Function | Dual-flow Discharge Wiring |
Temperature Compensation
When the ambient temperature deviates from the reference temperature of 30°C,
the rated current (In) should be multiplied by the corresponding correction factor
to obtain the effective continuous operating current.
| Ambient Temperature | -20°C | -10°C | 0°C | 10°C | 20°C | 30°C | 40°C | 50°C | 60°C |
|---|---|---|---|---|---|---|---|---|---|
| Correction Factor | 1.25 | 1.20 | 1.15 | 1.10 | 1.05 | 1.00 | 0.95 | 0.90 | 0.85 |
Tripping Curves (B / C / D)
The GYM10-DC DC Miniature Circuit Breaker is available with three magnetic
tripping characteristics, allowing flexible matching with different DC load types.
| Curve | Magnetic Trip Range | Typical Application |
|---|---|---|
| B | (6 ± 20%) × In | Resistive loads, long cable runs, low inrush DC circuits |
| C | (8.5 ± 20%) × In | General DC circuits, PV strings, telecom DC loads (Most Common) |
| D | (12 ± 20%) × In | High inrush loads, DC motors, capacitive battery banks |
X-axis: Multiples of rated current (×In).
Y-axis: Tripping time (seconds).
Please refer to the tripping curve diagrams in the product gallery.
Application Fields
The GYM10-DC 6-63A DC Miniature Circuit Breaker is widely used in:
- Solar PV power generation systems
- DC combiner boxes and photovoltaic distribution systems
- Battery energy storage systems (BESS)
- Solar inverter DC-side protection systems
- Telecom DC power supply systems
- Industrial DC power distribution systems
- Electric vehicle charging and DC control systems
By using the GYM10-DC miniature circuit breaker, customers can achieve reliable DC circuit protection, improved system safety, simplified installation, and long-term stable operation in renewable energy and industrial power applications.
