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Siemens 3VA1120-4ED42-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1120-4ED42-0AA0 SENTRON MCCB, 20 A, 4-Pole, 121 k

MPN3VA1120-4ED42-0AA0
Active

Siemens SENTRON 3VA1120-4ED42-0AA0, molded case circuit breaker, 4-pole, 20 A rated current, TM210 release, 121 kA breaking capacity at 240 V AC, IP40 front protection.

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

3VA1120-4ED42-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
3VA1120-4ED42-0AA0 — Ratings
ParameterValue
Number of poles4
Rated operational voltage Ue (AC)690 V
Rated insulation voltage Ui800 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 classS
Breaking capacity at 240 V121 kA
Breaking capacity at 415 V75.6 kA
Breaking capacity at 440 V52.5 kA
Breaking capacity at 500 V11.9 kA
Breaking capacity at 690 V11.9 kA
Power loss, max.12 W
3VA1120-4ED42-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM210
Overcurrent protection functionLI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA1120-4ED42-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typenut keeper kit on both ends
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1120-4ED42-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts0
3VA1120-4ED42-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1120-4ED42-0AA0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.20 000
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 3VA1120-4ED42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 20 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release designed for line protection.

Rated short-circuit breaking capacity drops with system voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V.

Thermal Derating and Ambient Range

The 20 A rating holds steady from 40 °C through 55 °C, then derates to 19 A at 60 °C through 70 °C.

Physical Fit and Protection

Dimensions are 101.6 mm wide, 130 mm tall, and 70 mm deep — a standard 4-pole MCCB footprint for DIN-rail or panel-mount installation.

Frequently asked questions

What is the breaking capacity of 3VA1120-4ED42-0AA0 at 240 V?

121 kA at 240 V AC, which is the highest short-circuit rating across its voltage range.

Where can I buy 3VA1120-4ED42-0AA0?

Sourced and quoted to order against an RFQ through independent distribution channels; availability and current pricing are confirmed at quote time.

What does the TM210 release designation mean?

TM210 is a thermal-magnetic release — the thermal element handles overload protection and the magnetic element handles short-circuit protection, tuned for line-protection duty rather than motor or generator protection.

MPN
3VA1120-4ED42-0AA0