The K curve is designed for motor and transformer circuits where inrush currents are higher than resistive loads — it trips between 10× and 14× rated current, so it holds through the start-up surge of a small motor or a control transformer primary.
Siemens 5SL7410-3RC MCB, 10A 4-pole K char 15kA
MPN5SL7410-3RC
Siemens 5SL7410-3RC, Miniature Circuit Breaker, 10A, 4-pole, K characteristic, 15kA breaking capacity.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Product details
Frequently asked questions
What does the K characteristic mean on this MCB?
The K characteristic trips between 10× and 14× rated current, making it suitable for motor and transformer circuits that draw a high inrush on start-up. It holds through the surge without nuisance tripping, unlike a B or C curve that would trip sooner.
What is the breaking capacity of the 5SL7410-3RC?
It is rated at 15 kA, which is the maximum fault current the breaker can safely interrupt at its rated voltage. This figure determines whether the breaker coordinates with upstream protective devices in a selective scheme.
Where can I buy the 5SL7410-3RC?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
MPN
5SL7410-3RC