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Siemens 3VA2125-5KQ36-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA2125-5KQ36-0AA0 SENTRON MCCB, 25 A, 3-Pole, 187 k

MPN3VA2125-5KQ36-0AA0
Active

Siemens SENTRON 3VA2125-5KQ36-0AA0, molded case circuit breaker, 3-pole, 25 A rated, 300 A frame, 187 kA at 240 V, line protection, with communication and ground-fault monitoring.

Siemens 3VA2125-5KQ36-0AA0 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

3VA2125-5KQ36-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
3VA2125-5KQ36-0AA0 — Ratings
ParameterValue
Number of poles3
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 classM
Breaking capacity at 240 V187 kA
Breaking capacity at 415 V121 kA
Breaking capacity at 440 V121 kA
Breaking capacity at 500 V75.6 kA
Breaking capacity at 690 V3.7 kA
Power loss, max.0.6 W
3VA2125-5KQ36-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeETU860
Overcurrent protection functionLSIG
Ground-fault monitoringSummation current formation L-conductor
Grounding protection functionYes
3VA2125-5KQ36-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typedouble-sided box terminal
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA2125-5KQ36-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionYes
Measurement functionYes
Motor drive optionYes
Auxiliary CO contacts0
3VA2125-5KQ36-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA2125-5KQ36-0AA0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.25 000
Height181 mm
Width105 mm
Depth86 mm
Height (in)7.13 in
Width (in)4.13 in
Depth (in)3.39 in

Product details

Its interrupting capacity reaches 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — so it handles high-fault-current scenarios common in industrial switchboards without cascading upstream.

Environmental and compliance range

Maximum power loss is 0.6 W. These figures define the breaker's thermal limits in enclosed panels — a 70 °C ambient ceiling means it can sit in a non-ventilated cabinet near other heat sources without derating below its 25 A continuous rating.

Frequently asked questions

What is the closest functional second-source for 3VA2125-5KQ36-0AA0?

The 3VA2125-8KQ42-0AA0 is a functional sibling within the same SENTRON 3VA series. Both share the 3-pole, 25 A rated, 300 A frame design. The key difference is the interrupting capacity at higher voltages — the 5KQ36 variant carries 187 kA at 240 V, while the 8KQ42 variant's ratings differ. Verify the required SCCR at your nominal voltage before substituting.

Where can I buy 3VA2125-5KQ36-0AA0 and how is it quoted?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

MPN
3VA2125-5KQ36-0AA0