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A workshop kept tripping on startup surges until we swapped in this B3-63 — the 6kA breaking capacity handles those inrush spikes without nuisance trips, and you get overcurrent protection with circuit-breaker failure backup built-in.
4-pole version means you can run 400V three-phase with neutral protection in one compact 18mm-wide module per pole, so retrofitting old distribution boards actually goes faster than expected.
Most buyers go with the 50A or 63A for commercial kitchen lines, but we also see labs using the 1A to 5A ratings for delicate instruments — just something to be aware of if you're doing isolation work (break times are tighter than typical DIN rail units).
Rated insulation voltge hits 500V and U imp is 6kV, which matters for surge-prone environments like factories near welding bays — it basically takes teh hit so downstream gear doesn't.
We hold ISO, CE, CB, and CCC certs across all batches, so import compliance is usually straightforward — about 20 days or so for small runs, MOQ starts at 1 piece if you're testing compatibilty first.
It's not suited for DC circuits at all, though — arc-extinguishing is air-based, and the 50/60Hz coil won't clear DC properly, so you'd need a dedicated DC breaker for solar or battery banks.
It has ISO9001-2000, CE, CB, and CCC certifications, so it meets international and Chinese safety standards for low-voltage circuit breakers.
Yes, the MOQ for the B3-63 is 1 piece. You can absolutely order a single unit to test before committing to a larger batch.
It comes in 1, 2, 3, 5, 6, 10, 16, 20, 25, 32, 40, 50, and 63 amps, so you can pick the right rating for your circuit.
Yes, since it's a customizable product from a factory, we can add your logo or design custom packaging based on your order volume.
Lead time depends on quantity, but for standard batches we usually ship within 15-30 days after order confirmation. We'll confirm timing when you place the order.
