The 50 A rating governs the continuous load it can carry in a 40 °C ambient — derate above that per the thermal curve. At 45 °C ambient, which is realistic inside a sealed enclosure near a kiln or preheater, you'd knock the continuous load back roughly 10–15% to stay below the bimetal trip threshold. Terminals accept solid or stranded conductors from 0.75 mm² up to 25 mm² — that's a wide grip, covering everything from a 1.5 mm² control circuit tap to a 16 mm² feeder.
Siemens 5SJ6250-6 SENTRON MCB, 2-Pole B 50A 6kA 400V
MPN5SJ6250-6
Siemens SENTRON 5SJ6, miniature circuit breaker, 2-pole, B-curve, 50 A, 6 kA, 400 V AC, 70 mm depth.
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breakers |
| Brand name | SENTRON |
| Parameter | Value |
|---|---|
| Number of poles | 2 |
| Parameter | Value |
|---|---|
| Tripping characteristic class | B |
| Overvoltage category | 3 |
| Parameter | Value |
|---|---|
| Installation depth | 70 mm |
| Mounting position | any |
| Protection degree (IP) | IP20, with connected conductors |
Product details
Frequently asked questions
What are the key ratings of 5SJ6250-6?
2-pole, B-curve, 50 A at 400 V AC, 6 kA breaking capacity per EN 60898 and IEC 60947-2, 60 V DC maximum, 20 000 mechanical switching cycles typical.
Will 5SJ6250-6 drop into a panel specified for 5SJ6220-6 without rewiring?
Yes — both are 2-pole 5SJ6 breakers with the same 70 mm depth, 2 width units, and terminal range of 0.75–25 mm². The only difference is the current rating: 50 A vs 20 A. If the panel's bus bars and conductors are sized for 50 A, it's a straight swap.
Where can I buy 5SJ6250-6?
Sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time.
MPN
5SJ6250-6