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Siemens 3VA1225-4EF42-0AG0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1225-4EF42-0AG0 SENTRON MCCB, 250 A, 4-Pole, TM24

MPN3VA1225-4EF42-0AG0

Siemens SENTRON 3VA1225-4EF42-0AG0, molded case circuit breaker, 4-pole, 250 A rated continuous current, TM240 thermal-magnetic release, line protection version, 70 mm depth.

Siemens 3VA1225-4EF42-0AG0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3VA1225-4EF42-0AG0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
Product versionLine protection
Basic switch (supplied) ref.3VA12254EF420AA0
Integrated auxiliary / alarm switch ref.3VA9988-0AB11
3VA1225-4EF42-0AG0 — Ratings
ParameterValue
Number of poles4
Current at 40 °C250 A
Current at 45 °C250 A
Current at 50 °C250 A
Current at 55 °C243.3 A
Current at 60 °C236.5 A
Current at 65 °C229 A
Current at 70 °C223 A
Switching capacity classS
Breaking capacity at 240 V121 kA
Breaking capacity at 415 V75.6 kA
Breaking capacity at 440 V25 kA
Breaking capacity at 690 V11.9 kA
3VA1225-4EF42-0AG0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM240
Overcurrent protection functionLI
3VA1225-4EF42-0AG0 — Construction & Connection
ParameterValue
Main circuit connection typelug terminal
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1225-4EF42-0AG0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorYes
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts2
3VA1225-4EF42-0AG0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1225-4EF42-0AG0 — Mechanical
ParameterValue
Height158 mm
Width140 mm
Depth70 mm

Product details

Siemens SENTRON 3VA1225-4EF42-0AG0 — 250 A MCCB, 4-Pole, TM240 Release

Breaking capacity varies with system voltage: 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V. Thermal derating is published per the spec table: the breaker holds 250 A from 40 °C through 50 °C, then steps down to 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C.

Sourcing & Lifecycle — Active Production, Quoted to Order

Front-face protection is IP40, which keeps tools and fingers out but does not seal against moisture — the breaker belongs in a closed panel, not a washdown zone.

Frequently asked questions

Where can I buy 3VA1225-4EF42-0AG0 and get current pricing?

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 estimate.

What is the breaking capacity of 3VA1225-4EF42-0AG0 at 415 V?

At 415 V the breaking capacity is 75.6 kA. At 240 V it is 121 kA, at 440 V it is 25 kA, and at 690 V it is 11.9 kA.

Does 3VA1225-4EF42-0AG0 include an undervoltage release or communication module?

No. This configuration ships without an undervoltage release, without a shunt trip (voltage trigger), without communication functions, and without ground-fault monitoring. The auxiliary contact set is one auxiliary switch plus one trip alarm switch (HP type).

What is the thermal derating for 3VA1225-4EF42-0AG0 above 50 °C?

The breaker holds 250 A from 40 °C through 50 °C. Above that: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C. Load must be trimmed per the published derating curve.

MPN
3VA1225-4EF42-0AG0