GDDCM1-400 DC MCCB Overview
The GDDCM1-400 DC MCCB is a high-current molded case circuit breaker developed for overload and short-circuit protection in low-voltage DC distribution systems. With a 400A rated current, 2-pole configuration, and 1000V DC rated operating voltage, it is suitable for applications where conventional miniature circuit breakers cannot provide sufficient current capacity or fault interruption performance.
The breaker uses a robust molded case construction designed to provide mechanical strength, insulation performance, and reliable switching in demanding electrical installations. Its rated insulation voltage of 1500V provides additional electrical margin for high-voltage DC systems, while the 12kV impulse withstand voltage helps improve resistance to transient overvoltage.
The GDDCM1-400 DC MCCB provides a rated ultimate short-circuit breaking capacity (Icu) of 20kA. Its service short-circuit breaking capacity (Ics) is specified as 100% of Icu, allowing the breaker to maintain strong fault interruption capability in industrial and renewable-energy applications.
According to the product marking, the breaker complies with IEC60947-2, making it suitable for professional low-voltage circuit protection systems. The front operating handle provides clear ON/OFF control, and the molded housing is designed for integration into DC distribution cabinets, battery systems, photovoltaic equipment, and industrial power panels.
For distributors, panel builders, solar equipment manufacturers, and project buyers, the GDDCM1-400 DC MCCB provides a practical 400A protection solution for high-current DC circuits requiring reliable isolation and short-circuit protection.
Product Features
- 2P DC molded case circuit breaker
- Rated current: 400A
- Rated operating voltage: 1000V DC
- Rated insulation voltage: 1500V
- Rated impulse withstand voltage: 12kV
- Ultimate breaking capacity Icu: 20kA
- Service breaking capacity Ics: 100% Icu
- Instantaneous setting Ii: 10 × In
- Utilization category: Cat A
- Reference temperature marking: 40°C
- Strong molded case construction
- Clear manual ON/OFF operation
- Suitable for high-current DC distribution
- Complies with IEC60947-2
Technical Specifications
| Parameter | Description |
|---|---|
| Model | GDDCM1-400 |
| Type | DC Molded Case Circuit Breaker |
| Rated Current | 400A |
| Poles | 2P |
| Rated Voltage | 1000V DC |
| Breaking Capacity | 20kA |
| Mounting | Vertical / Horizontal |
| Trip Type | Thermal-magnetic |
| Standard Compliance | IEC 60947-2 |
| Application | Solar PV / Battery / Industrial DC Systems |
Applications
The GDDCM1-400 DC MCCB is suitable for high-current DC systems that require reliable overload, isolation, and short-circuit protection.
Typical applications include:
- Solar photovoltaic DC distribution
- Battery energy storage systems
- High-capacity battery banks
- DC combiner and distribution cabinets
- Industrial DC power systems
- DC control panels
- Renewable energy equipment
- Charging and power conversion equipment
- Large DC power supplies
- OEM electrical assemblies
Its combination of 400A current capacity, 1000V DC rating, and 20kA Icu makes it particularly suitable for higher-power DC installations.
Why Choose GA&DA GDDCM1-400?
The GDDCM1-400 DC MCCB is designed for applications where higher current capacity and stronger interruption performance are required than standard DC miniature circuit breakers can provide.
Key advantages include:
- 400A high-current protection
- 1000V DC operating capability
- 1500V insulation voltage
- 12kV impulse withstand performance
- 20kA ultimate breaking capacity
- Ics equal to 100% of Icu
- IEC60947-2 compliance
- Durable molded case structure
- Suitable for renewable-energy and industrial DC projects
- OEM and bulk purchasing support
GA&DA can support electrical distributors, panel builders, system integrators, and project buyers with product selection and volume supply.
FAQ
What is the rated current of the GDDCM1-400 DC MCCB?
The GDDCM1-400 DC MCCB has a rated current of 400A.
What is the rated operating voltage?
The product is rated at 1000V DC.
How many poles does the GDDCM1-400 have?
This version is a 2-pole DC MCCB.
What is the breaking capacity?
The rated ultimate short-circuit breaking capacity Icu is 20kA.
What does Ics 100% Icu mean?
It means the rated service short-circuit breaking capacity is specified at 100% of the ultimate breaking capacity.
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