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Siemens 3VA1120-4EF42-0AA0-ZD00 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1120-4EF42-0AA0-ZD00 Circuit Breaker, 20A, 36kA @

MPN3VA1120-4EF42-0AA0-ZD00

Siemens 3VA1 IEC frame 160, breaking capacity class S, 36kA @ 415V, 4-pole, TM240 thermal-magnetic trip unit, In=20A, overload Ir=14A...20A, short-circuit Ii=8...16 x In, N conductor unprotected, nut keeper kit, DC Power OEM China.

Siemens 3VA1120-4EF42-0AA0-ZD00 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Product details

The Siemens 3VA1120-4EF42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker from the 3VA1 series, configured for line protection with a TM240 thermal-magnetic trip unit. The TM240 trip provides adjustable overload protection (Ir = 14 A to 20 A) and fixed short-circuit protection (Ii = 8 to 16 × In), so the 20 A In rating lets you dial the thermal pickup to match the actual load current on the BOM.

Deployment context

Mounts in a standard IEC panel on DIN rail or via the frame's bolt-on footprint. The 4-pole configuration with unprotected N conductor suits 3-phase + neutral systems where the neutral does not require overcurrent protection — common in distribution sub-feed panels.

Frequently asked questions

What is the breaking capacity of this breaker?

The breaking capacity is 36 kA at 415 V (IEC class S), which means it can safely interrupt fault currents up to that level without requiring upstream coordination.

Where can I buy 3VA1120-4EF42-0AA0-ZD00 and how is it quoted?

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

MPN
3VA1120-4EF42-0AA0-ZD00