The Siemens 5SL6240-6BB is a 2-pole miniature circuit breaker rated 400 V with a 6 kA breaking capacity, B-curve trip characteristic, and 40 A rated current, built for the Italian market. The B-curve (3–5× In) means it trips fast on short-circuit but tolerates moderate inrush — typical for resistive and general-purpose loads in final sub-distribution. The 2-pole form factor (both L and N switched) is common in Italy for single-phase final circuits where the neutral must be switched alongside the line.
5SL6240-6BB Miniature Circuit Breaker 400 V 6kA, 2-pole B, 4
MPN5SL6240-6BB
Siemens 5SL6240-6BB miniature circuit breaker, 400 V 6kA, 2-pole B, 40 A, Italy version.
Source DocumentedChannel stated on listing & quote
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Product details
Frequently asked questions
What is the 5SL6240-6BB used for?
It is a 2-pole miniature circuit breaker rated 400 V, 6 kA, B-curve, 40 A, designed for final sub-distribution in Italian-style installations where both line and neutral are switched.
Where can I buy the 5SL6240-6BB?
This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
MPN
5SL6240-6BB