Skip to main content
Siemens 3VA1120-3GD42-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1120-3GD42-0AA0 SENTRON MCCB, 20 A, 4-Pole, 75.6

MPN3VA1120-3GD42-0AA0
Active

Siemens SENTRON 3VA1120-3GD42-0AA0, molded case circuit breaker, 4-pole, 20 A, TM210 thermal-magnetic release, line protection, 75.6 kA breaking capacity at 240 V AC.

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

3VA1120-3GD42-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
3VA1120-3GD42-0AA0 — 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 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
3VA1120-3GD42-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM210
Overcurrent protection functionLI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA1120-3GD42-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typenut keeper kit on both ends
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1120-3GD42-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts0
3VA1120-3GD42-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1120-3GD42-0AA0 — 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 75.6 kA interrupting rating at 240 V AC gives it the headroom to clear high-fault currents without upstream coordination issues; at 415 V it still holds 52.5 kA, and at 690 V it drops to 11.9 kA, which is typical for this frame size.

Ratings that matter for panel fit

Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — standard for the 3VA1 frame, so it mounts on a DIN rail or panel-mount plate without surprises.

Coordination and selectivity notes

The TM210 release is thermal-magnetic — fixed thermal pickup for overload, magnetic for short-circuit. If you need selectivity with a downstream 20 A MCB, the MCCB's magnetic trip threshold (typically 10x In for TM releases) should coordinate, but you'll want to verify with the selectivity tables in the 3VA manual.

Frequently asked questions

Where can I buy 3VA1120-3GD42-0AA0 and how is it quoted?

We source and quote this part to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures or lead-time numbers on the public page, but a quote request gets you the real numbers.

What is the breaking capacity of this MCCB at different voltages?

75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The interrupting rating drops with voltage, which is normal for this frame class.

Does this MCCB have a trip indicator or communication capability?

No. This variant has no trip indicator, no undervoltage release, and no communication function. It is a basic thermal-magnetic line protection breaker.

MPN
3VA1120-3GD42-0AA0