Skip to main content
Log in
Siemens 3VA2125-0KP46-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA2125-0KP46-0AA0 SENTRON MCCB, 25 A, 4-Pole, ETU85

MPN3VA2125-0KP46-0AA0
Active

Siemens SENTRON 3VA2125-0KP46-0AA0, molded case circuit breaker, 4-pole, 25 A continuous, ETU850 electronic trip, 440 kA at 415 V, IP40 front.

Siemens 3VA2125-0KP46-0AA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3VA2125-0KP46-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
3VA2125-0KP46-0AA0 — 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 classE
Breaking capacity at 415 V440 kA
Breaking capacity at 690 V187 kA
Power loss, max.0.5 W
3VA2125-0KP46-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeETU850
Overcurrent protection functionLSI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA2125-0KP46-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typedouble-sided box terminal
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA2125-0KP46-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionYes
Measurement functionYes
Motor drive optionYes
Auxiliary CO contacts0
3VA2125-0KP46-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA2125-0KP46-0AA0 — 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

The IP40 front protection keeps dust and small tools out of the breaker face, which is standard for enclosed panel mounting.

Trip unit and protection flexibility

The ETU850 is an electronic trip unit that supports adjustable N-conductor protection from OFF to 40%–160% of the rated current. This lets you tune the breaker for 3-pole + N or 4-pole applications where the neutral conductor may carry different fault levels than the phases. The breaker also includes a communication function, so it can report status and trip events to a higher-level monitoring system — useful for a BMS or SCADA-connected facility.

Environmental and storage limits

Power loss is a modest 0.5 W maximum, so heat buildup in a densely packed panel is minimal.

Frequently asked questions

Where can I buy the 3VA2125-0KP46-0AA0 and what is the lead time?

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

What is the interrupting capacity of this MCCB?

The 3VA2125-0KP46-0AA0 has a 440 kA interrupting rating at 415 V AC and 187 kA at 690 V AC. These are very high values for a 25 A frame, giving strong selectivity headroom in high-fault-current installations.

Does this breaker support communication for monitoring?

Yes, the ETU850 trip unit includes a communication function, allowing it to report trip events and status to a higher-level system. This is useful for BMS or SCADA integration.

What compliance documentation is available for this part?

As a Siemens SENTRON product, this MCCB carries the standard IEC/EN 60947-2 certifications. Compliance documentation (CE, UKCA, RoHS, REACH) is provided with the shipment upon request.

MPN
3VA2125-0KP46-0AA0