MCB / DC MCB
DC Miniature Circuit Breakers for Solar PV & Battery Storage
TPKELE DC MCBs are purpose-built for photovoltaic strings, battery energy storage and DC bus protection. Special arc-quenching contacts safely break DC arcs up to 1000V/1500V system voltages. 1P, 2P, 3P and 4P pole configurations support residential rooftop to utility-scale PV — the right DC circuit breaker for solar EPCs, combiner box assemblers and BESS integrators.
DC MCB Products
4 products
DC MCB Technical Parameters
| No. | Parameter Category | Key Specifications |
|---|---|---|
| 01 | Core Electrical Ratings | Rated Current: 1A–125A | Rated Voltage: DC 250V / 500V / 800V / 1000V / 1200V / 1500VPoles: 1P / 2P / 3P / 4P | Breaking Capacity: 4.5kA / 6kA / 10kA / 15kA / 20kARated Insulation Voltage (Ui): 500V / 1000V / 1500V | Rated Impulse Withstand Voltage (Uimp): 4kV / 6kV / 8kVFrequency: DC |
| 02 | Trip & Protection Characteristics | Protection Types: Overload Protection and Short Circuit ProtectionTrip Curves: B Curve (3–5×In), C Curve (5–10×In), D Curve (10–20×In)Typical Use: C Curve for general DC distribution, PV and battery storage |
| 03 | Voltage & Pole Configuration | 1P: DC 250V / 500V | 2P: DC 500V / 1000V3P: DC 750V / 1000V / 1200V | 4P: DC 1000V / 1500VMulti-pole designs improve safe DC arc interruption |
| 04 | Mechanical & Installation Data | Mounting: 35mm DIN Rail | Cable Capacity: 1–25mm² / 1–35mm² / 1–50mm²Terminal Torque: typically 2.0–3.5 N·m | Mechanical Life: 10,000–20,000 cyclesElectrical Life: 1,500–6,000 cycles | Protection Degree: IP20Ambient Temperature: -25°C to +70°C |
| 05 | Materials & Safety Features | Housing Material: Flame-retardant PA66, typically UL94 V-0 | Contact Material: Silver AlloyArc Extinguishing: Special DC arc-quenching system | Polarity: polarity-sensitive on some modelsStatus Indication: red/green window | Isolation Function: available on selected models |
| 06 | Standards & Applications | Standards: IEC 60947-2, IEC 60898-2, EN 60947-2, UL 489BApplications: Solar PV strings, combiner boxes, battery energy storage systems, DC distribution, EV charging, control cabinets |
Mechanical & Installation Parameters
| Parameter | Common Requirement |
|---|---|
| Mounting | 35mm DIN rail |
| Terminal | Top & bottom wiring, copper wire / busbar connection |
| Cable Capacity | 1–25mm² / 1–35mm² / 1–50mm² |
| Torque | 2.0–3.5 N·m, depends on model |
| Mechanical Life | 10,000–20,000 cycles |
| Electrical Life | 1,500–6,000 cycles |
| Protection Degree | IP20 (typical) |
| Ambient Temperature | -25°C to +70°C (typical) |
Materials & Safety Parameters
| Parameter | Common Requirement |
|---|---|
| Housing Material | Flame-retardant nylon / PA66, typically UL94 V-0 |
| Contact Material | Silver alloy contacts preferred |
| Arc Extinguishing System | DC circuit breakers must have a dedicated arc-quenching structure |
| Polarity | Some DC MCBs are polarized (+/−); wiring direction cannot be reversed |
| Indicator | Red / green status indication window |
| Isolation Function | Some models can be used as an isolation switch |