What the ratings mean for your panel
20A continuous rating handles typical 20A circuits. 240V rating is line-to-line or line-to-neutral. 5kA interrupting capacity clears faults up to 5,000A.
Siemens 5SN7120-0KB30 Miniature Circuit Breaker, 20A 1-Pole 240V 5kA
MPN5SN7120-0KB30
Siemens 5SN7120-0KB30, Miniature Circuit Breaker (MCB), 1-pole, 20A, 240V, 5kA interrupting capacity, DIN-rail mount, bulk packaging.
$96.42Ref. price · indicative, final on quote
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
Specifications
| Parameter | Value |
|---|---|
| Weight | 0.61 kgs |
Product details
Frequently asked questions
What are the key ratings of the 5SN7120-0KB30?
The 5SN7120-0KB30 is a 1-pole miniature circuit breaker rated 20A at 240V with a 5kA interrupting capacity, designed for DIN-rail mounting.
MPN
5SN7120-0KB30