TPB7-63 DC Miniature Circuit Breaker (MCB) for Solar Protection
DC 300V–1200V, 6–63A, 6kA Breaking Capacity, Thermal-Magnetic, IEC 60947-2
The TPB7-63 is a DC miniature circuit breaker (MCB) that provides resettable overload and short-circuit protection for photovoltaic strings and DC distribution circuits, rated for DC 300V to 1200V across 1P to 4P configurations at 6A to 63A. It is commonly installed in PV combiner boxes, DC distribution systems, and solar string protection applications where compact, resettable DIN-rail protection is required, based on the L7 breaker platform.
Technical data
| Pole | 1P | 2P | 3P | 4P |
| Rated Working Voltage Ue (V) | 300V DC | 600V DC | 900V DC | 1200V DC |
| Frame degree rated current (A) | 63 | |||
| Rated current In(A) | 6/10/16/20/25/32/40/50/63 | |||
| Rated Frequency (Hz) | 50/60 | |||
| Breaking Capacity Icu(kA) | 6 | |||
| impact voltage Uimp(kV) | 4 | |||
| Curve type | C | |||
| Trip type | Thermal-magnetic | |||
| Levels of Protection | IP20 | |||
| Reference Standard | IEC 60947-2 | |||
| Mechanical life (Maxtimes) | 20000 | |||
| Electrical life (Maxtimes) | 6000 | |||
| Operating Temperature | -20°C to +70°C | |||
| Humidity | ≤95% | |||
| Flame-Retardant Housing | UL94 V-0 | |||
| Altitude | 2000m | |||
| Installation | 35mm DIN Rail | |||
| Wiring capacity (mm2) | In ≤ 32A,1~25mm2,I ≥ 40A,10~35mm2 | |||
| Dimensions and Weight | ||||
| Pole | 1P | 2P | 3P | 4P |
| Product Size L*W*H（mm） | 73*18*87 | 73*36*87 | 73*54*87 | 73*72*87 |
| Product Weight（kg） | 0.108 | 0.215 | 0.323 | 0.43 |
| Inner box Packaging Details (Pcs) | 12 | 6 | 4 | 3 |
| Inner box package size（mm） | 225*10*85 | 225*10*85 | 225*10*85 | 225*10*85 |
| Inner box package Weight（kg） | 1.316 | 1.316 | 1.316 | 1.316 |
| Outer box Packaging Details (Pcs) | 240 | 120 | 80 | 60 |
| Outer box size(mm) | 530*240*365 | 530*240*365 | 530*240*365 | 530*240*365 |
| Outer box Weight(kg) | 26.5 | 26.5 | 26.5 | 26.5 |
- Dimension Drawing (mm)
- Wiring Diagram
TPB7-63 Applications
- Residential rooftop PV.
Compact 1P and 2P versions protect individual strings in small rooftop arrays at DC 300V–600V, fitting standard consumer-unit-style enclosures on a 35mm DIN rail.
- Commercial & industrial solar.
3P and 4P versions handle higher system voltages up to DC 1200V in C&I combiner boxes, providing resettable string and array protection without the replacement cost of fuses.
- DC distribution & off-grid.
Used in battery and off-grid DC distribution boards where overload and short-circuit protection must be quickly resettable in the field, reducing downtime versus fuse-only designs.
Send us your product model or project requirements — our engineering team will reply with a tailored quotation and confirmed lead time within 24 hours.
TPB7-63 OEM & Customization
TYPLE supplies the TPB7-63 DC MCB on an OEM and ODM basis for distributors, combiner box assemblers, and EPC contractors. Available customization includes current rating selection (6A–63A), pole configuration (1P–4P), private-label branding and packaging, and matched supply alongside DC fuses, DC SPDs, and DC isolators for complete combiner box bills of materials. The TPB7-63 is engineered to align with IEC 60947-2, and component test certificates are available through TYPLE’s qualified supply-chain partners.
Send us your product model or project requirements — our engineering team will reply with a tailored quotation and confirmed lead time within 24 hours.
TPB7-63-DC-MCB-Key selling points
DC MCB FAQs
No. AC and DC MCBs are not interchangeable. DC arcs have no natural zero-crossing, so a DC fault requires an MCB with a DC-rated arc-extinguishing design. The TPB7-63 is built specifically for DC circuits up to 1200V and must not be replaced with an AC-rated MCB.
The TPB7-63 supports DC 300V (1P), 600V (2P), 900V (3P), and 1200V (4P). The poles are connected in series to reach the required system voltage, so the number of poles is selected according to the maximum DC system voltage.
A DC MCB is resettable and can be switched off manually for maintenance, while a DC fuse must be replaced after it operates. The TPB7-63 MCB is often used for the main output disconnect or where frequent resetting is needed, while fuses protect individual strings.
The TPB7-63 covers DC systems up to 1200V using its 4P configuration, suitable for most 1000V PV systems. For 1500V systems, a higher-rated DC breaker is configured on request according to the array voltage.
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