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

Siemens 3VA1120-3EF42-0AA0 SENTRON MCCB, 20 A, 4-Pole, 75.6

MPN3VA1120-3EF42-0AA0
Active

Siemens SENTRON 3VA1120-3EF42-0AA0, Molded case circuit breaker, 4-pole, 20 A at 40 °C, TM240 release, breaking capacity 75.6 kA at 240 V AC.

Siemens 3VA1120-3EF42-0AA0 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

Specifications

3VA1120-3EF42-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
Product versionLine protection
3VA1120-3EF42-0AA0 — Ratings
ParameterValue
Number of poles4
Rated operational voltage Ue (AC)690 V
Current at 40 °C20 A
Current at 45 °C20 A
Current at 50 °C20 A
Current at 55 °C20 A
Current at 60 °C19 A
Current at 65 °C19 A
Current at 70 °C19 A
Switching capacity classN
Breaking capacity at 240 V75.6 kA
Breaking capacity at 415 V52.5 kA
Breaking capacity at 440 V32 kA
Breaking capacity at 500 V11.9 kA
Breaking capacity at 690 V11.9 kA
Power loss, max.12 W
3VA1120-3EF42-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM240
Overcurrent protection functionLI
Ground-fault monitoringWithout
3VA1120-3EF42-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typenut keeper kit on both ends
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1120-3EF42-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts0
3VA1120-3EF42-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1120-3EF42-0AA0 — Mechanical
ParameterValue
Height130 mm
Width101.6 mm
Depth70 mm
Height (in)5.12 in
Width (in)4 in
Depth (in)2.76 in

Product details

The Siemens SENTRON 3VA1120-3EF42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated 20 A continuous at 40 °C, with the TM240 thermal-magnetic release providing fixed overload and short-circuit protection. At 415 V the rating drops to 52.5 kA, and at 690 V to 11.9 kA, so verify the available fault current at your service voltage before committing the BOM line. The IP40 protection on the front means the breaker face is sealed against tools and small solids but not against moisture — suitable for a dry indoor panel.

Physical fit and integration

The 4-pole body occupies the same DIN-rail footprint as other SENTRON 3VA breakers of this frame size. If your BOM calls for a shunt trip or aux contact, order the accessory separately.

Frequently asked questions

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

The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures or prices are published here.

What is the breaking capacity of 3VA1120-3EF42-0AA0 at different voltages?

At 240 V it is 75.6 kA; at 415 V it is 52.5 kA; at 440 V it is 32 kA; at 500 V and 690 V it is 11.9 kA. The rating steps down as voltage rises — always confirm against the available fault current at your service voltage.

MPN
3VA1120-3EF42-0AA0