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Siemens 3VA2125-7KQ42-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA2125-7KQ42-0AA0 SENTRON MCCB, 25 A, 4-Pole, 330 k

MPN3VA2125-7KQ42-0AA0
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Siemens SENTRON 3VA2125-7KQ42-0AA0, molded case circuit breaker, 25 A, 4-pole, 330 kA interrupting at 240 V, line protection with ground-fault monitoring.

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

3VA2125-7KQ42-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
3VA2125-7KQ42-0AA0 — Ratings
ParameterValue
Number of poles4
Rated operational voltage Ue (AC)690 V
Rated insulation voltage Ui800 V
Current at 40 °C25 A
Current at 45 °C25 A
Current at 50 °C25 A
Current at 55 °C25 A
Current at 60 °C25 A
Current at 65 °C25 A
Current at 70 °C25 A
Switching capacity classC
Breaking capacity at 240 V330 kA
Breaking capacity at 415 V242 kA
Breaking capacity at 440 V242 kA
Breaking capacity at 500 V187 kA
Breaking capacity at 690 V3.7 kA
Power loss, max.0.6 W
3VA2125-7KQ42-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeETU860
Overcurrent protection functionLSIG
Ground-fault monitoringSummation current formation L + N conductor
Grounding protection functionYes
3VA2125-7KQ42-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typeon both sides nut keeper kit
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA2125-7KQ42-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionYes
Measurement functionYes
Motor drive optionYes
Auxiliary CO contacts0
3VA2125-7KQ42-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA2125-7KQ42-0AA0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.25 000
Height181 mm
Width140 mm
Depth86 mm
Height (in)7.13 in
Width (in)5.51 in
Depth (in)3.39 in

Product details

Its interrupting capacity hits 330 kA at 240 V, dropping to 242 kA at 415 V and 440 V, then to 187 kA at 500 V, and 3.7 kA at 690 V — so the SCCR you plan for depends entirely on your system voltage. Designed for line protection, it includes ground-fault monitoring via summation current formation on L + N conductors, and it supports communication functions for integration into a monitored distribution scheme.

That 330 kA interrupting capacity at 240 V is what you cite for the SCCR label on a 240 V distribution board; at 415 V or 440 V it's still 242 kA, which covers most industrial fault-current scenarios.

The 140 mm width is the key panel-space dimension: it's wider than a 3-pole unit of the same frame, so verify your busbar spacing and enclosure cutout before committing to the layout.

Frequently asked questions

Does 3VA2125-7KQ42-0AA0 include ground-fault protection?

Yes, it includes ground-fault monitoring using summation current formation on the L + N conductors — it detects leakage by comparing line and neutral currents.

MPN
3VA2125-7KQ42-0AA0