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Siemens 3VA1140-4EF42-0AA0-ZD00 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1140-4EF42-0AA0-ZD00 Circuit Breaker, 40A, 36kA @

MPN3VA1140-4EF42-0AA0-ZD00

Siemens 3VA1 IEC frame 160, breaking capacity class S, Icu=36kA @ 415V, 4-pole, In=40A, TM240, ATAM, line protection, nut keeper kit for DC Power OEM in China.

Siemens 3VA1140-4EF42-0AA0-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 3VA1140-4EF42-0AA0-ZD00: The neutral conductor is unprotected on this variant — the breaker switches the three phases and leaves the N solid. That is the intended configuration for a 4-pole breaker feeding a TN-S or TN-C-S system where the neutral is bonded to ground and does not require overcurrent protection; if your design requires a protected neutral (e.g., for an IT system or a separately derived source), you need a different 3VA1 order code with an N-pole release.

The nut keeper kit (included per the order-code suffix) retains the terminal nuts during wiring — a practical detail when the panel is built on a bench and then shipped: the nuts do not rattle loose in transit. The breaker ships with the TM240 thermal-magnetic trip unit already installed; no separate trip-unit purchase is needed.

Frequently asked questions

Where can I buy 3VA1140-4EF42-0AA0-ZD00 and how do I get a price?

This part is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ); availability and current pricing are confirmed at quote time.

What does the 36 kA interrupting rating at 415 V mean for my panel?

It means this MCCB can safely interrupt a fault current up to 36 kA at 415 V without failing catastrophically — the standard breaking capacity (class S) for distribution boards where available fault current is below 40 kA. It is not suited for high-fault installations (e.g., directly downstream of a large transformer) where the prospective short-circuit current exceeds 36 kA.

Does this breaker protect the neutral conductor?

No — the neutral conductor is unprotected (solid N). This is the correct choice for TN-S or TN-C-S systems where the neutral is bonded to earth and does not require overcurrent protection. For a protected neutral, select a 3VA1 order code with an N-pole release.

What compliance documentation does Siemens provide for this MCCB?

Siemens 3VA1 series breakers carry IEC 60947-2 certification as standard. RoHS and REACH declarations are part of the manufacturer's standard documentation package. The evidence does not list UL or CSA marks for this exact order code; confirm with the manufacturer if a UL-listed variant is required for your jurisdiction.

MPN
3VA1140-4EF42-0AA0-ZD00