MCB / DC MCB
DC MCB 4P
TPKELE DC MCB 4P is a four-pole DC miniature circuit breaker designed for utility-scale photovoltaic and DC bus systems requiring four-pole series breaking for high system voltage.
Key Features
- 4 Pole DC
- Utility-scale DC voltage rating
- Series-pole arc breaking
- DIN rail mount
- CE & RoHS certified – accepted in EU, UK, and global markets
Need full datasheet, drawing or certificates for tender?
Typical Applications
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 |
Certifications & Standards
Verified to international standards for global tenders
OEM / ODM Available
Private label this MCB for your brand
Logo, color housing, packaging and certificate documentation tailored to distributor and brand-owner programs.
- Custom logo printing on housing and packaging
- Color housing variants for product line differentiation
- Private-label catalogs and datasheet customization
- Project-spec drawings, single-line diagrams and labels
- Container-load supply with export documentation
- Sample preparation within 5–10 working days
Frequently Asked Questions
What is the difference between AC MCB and DC MCB?
AC MCBs are designed for alternating current circuits — the AC zero-crossing helps extinguish arcs naturally. DC MCBs handle direct current with no zero-crossing, requiring specialized arc-quenching contact structures and magnets. Solar PV strings, batteries and DC bus systems must use DC MCBs rated for the system Uoc.
What system voltages do your DC MCBs cover?
Standard DC MCBs cover up to 1000V DC; for utility-scale PV we offer up to 1500V DC versions using 3P / 4P series configuration.
Which curve should I choose — B, C or D?
B curve (3–5 In) for resistive loads, C curve (5–10 In) for general-purpose distribution and mixed loads, D curve (10–20 In) for inductive loads with high inrush currents like motors and transformers.
Do you support OEM branding for MCBs?
Yes — logo printing, custom housing color, dedicated packaging and private-label catalogs are supported for distributor and brand-owner programs.
Do your MCBs carry CE certification?
Yes, all TPKELE MCBs are CE & RoHS compliant and tested per IEC 60898-1. Test reports are available for project tenders and customs documentation.
