The Siemens 5SJ6120-6RC is a 1-pole miniature circuit breaker from the Retail line, rated 20A with a B tripping characteristic and a 6kA breaking capacity. This is the part that sits on the DIN rail in a distribution board, sized for final subcircuit protection — lighting, general-purpose sockets, small resistive loads where the B-curve's magnetic trip between 3 and 5 times rated current keeps nuisance trips off the line on mild inrush.
Siemens 5SJ6120-6RC MCB, 1p 6kA 20A B Curve
MPN5SJ6120-6RC
Siemens 5SJ6120-6RC, MCB Retail line, 1-pole, 6kA breaking capacity, 20A B-characteristic.
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026
Product details
Frequently asked questions
What is the breaking capacity and curve of the 5SJ6120-6RC?
It is a 1-pole MCB rated 20A with a B characteristic and 6kA breaking capacity — suited for residential and light commercial final circuits where the B-curve handles resistive and small inductive loads without tripping on normal inrush.
Where can I buy the 5SJ6120-6RC?
This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed when you request a quote.
MPN
5SJ6120-6RC