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Siemens 3VA1120-5EF32-0KA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1120-5EF32-0KA0 SENTRON MCCB, 20 A, 187 kA at 240

MPN3VA1120-5EF32-0KA0

Siemens SENTRON 3VA1120-5EF32-0KA0, 3-pole molded case circuit breaker, 20 A rated at 40 °C, 187 kA breaking capacity at 240 VAC, shunt trip release.

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

3VA1120-5EF32-0KA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
Basic switch (supplied) ref.3VA11205EF320AA0
3VA1120-5EF32-0KA0 — Ratings
ParameterValue
Number of poles3
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 classM
Breaking capacity at 240 V187 kA
Breaking capacity at 415 V121 kA
Breaking capacity at 440 V75.6 kA
Breaking capacity at 500 V17 kA
Breaking capacity at 690 V17 kA
Power loss, max.12 W
3VA1120-5EF32-0KA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM240
Overcurrent protection functionLI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA1120-5EF32-0KA0 — Construction & Connection
ParameterValue
Main circuit connection typenut keeper kit on both ends
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1120-5EF32-0KA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerYes
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts0
3VA1120-5EF32-0KA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1120-5EF32-0KA0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.20 000
Height130 mm
Width76.2 mm
Depth70 mm
Height (in)5.12 in
Width (in)3 in
Depth (in)2.76 in

Product details

SENTRON 3VA1120-5EF32-0KA0 — 20 A MCCB with Shunt Trip

The Siemens 3VA1120-5EF32-0KA0 is a SENTRON 3-pole molded case circuit breaker rated 20 A continuous at 40 °C ambient, with a TM240 thermal-magnetic overcurrent release.

Breaking Capacity by Voltage — Selectivity Planning

Breaking capacity drops from 187 kA at 240 V to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500/690 V.

Rated 20 A from 40 °C through 55 °C ambient; at 60 °C it derates to 19 A, holding through 70 °C. Maximum power loss is 12 W — negligible for panel heat budget but worth noting if the breaker is packed tight in a sealed enclosure.

Frequently asked questions

What is the breaking capacity of 3VA1120-5EF32-0KA0 at 240 V?

187 kA at 240 VAC, which is the highest interrupting rating for this breaker across its voltage range.

Where can I buy 3VA1120-5EF32-0KA0?

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

What is the rated current of 3VA1120-5EF32-0KA0 at 40 °C?

20 A continuous, holding through 55 °C before derating to 19 A at 60 °C.

MPN
3VA1120-5EF32-0KA0