Skip to main content
Log in
Siemens 5SL7420-8RC — Miniature Circuit Breakers (MCB)

Siemens 5SL7420-8RC MCB, 415V 4-Pole 15kA D 20

MPN5SL7420-8RC

Siemens 5SL7420-8RC, miniature circuit breaker, 415 V, 4-pole, 15 kA, D 20 characteristic.

Siemens 5SL7420-8RC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Product details

The Siemens 5SL7420-8RC is a 4-pole miniature circuit breaker rated at 415 V with a 15 kA breaking capacity and a D 20 tripping characteristic. That D curve means it's built for loads with a high inrush current — think motor starters, transformers, or discharge lighting — where the magnetic trip won't nuisance-trip on startup but still clears a hard fault fast.

The 4-pole format covers three-phase plus neutral, common for 400 V three-phase final subcircuits in commercial or light industrial installations.

Frequently asked questions

What is the breaking capacity of 5SL7420-8RC?

It's rated for 15 kA at 415 V, which covers most standard building-service fault levels without requiring a current-limiting upstream breaker.

What does the D 20 characteristic mean?

The D curve means the magnetic trip threshold is set higher — typically 10 to 20 times rated current — so it won't trip on motor or transformer inrush but still clears a hard short-circuit fast. The 20 is the rated current in amps.

Where can I buy 5SL7420-8RC?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
5SL7420-8RC