The 4-pole configuration (all poles switched and protected) is standard for three-phase plus neutral applications, and the 6 kA breaking capacity is adequate for most final subcircuits in a TN or TT system.
Siemens 5SJ6420-6RC MCB, 4p 6kA 20A B Characteristic
MPN5SJ6420-6RC
Siemens 5SJ6420-6RC, MCB Retail line, 4-pole, 6kA breaking capacity, 20A rated current, B characteristic.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Product details
Frequently asked questions
What is the 5SJ6420-6RC used for?
This 4-pole MCB with a B characteristic and 20 A rating is used for overcurrent and short-circuit protection in three-phase plus neutral circuits, typically in commercial or residential distribution boards for lighting or general-purpose loads with low inrush current.
Where can I buy the 5SJ6420-6RC?
The 5SJ6420-6RC is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
MPN
5SJ6420-6RC