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Siemens 3VA1225-4GF42-0CA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1225-4GF42-0CA0 SENTRON MCCB, 250 A, 4-Pole, 121

MPN3VA1225-4GF42-0CA0

Siemens SENTRON 3VA1225-4GF42-0CA0, molded case circuit breaker, 250 A, 4-pole, TM240 release, 121 kA at 240 V, undervoltage release, IP40 front.

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

3VA1225-4GF42-0CA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
Product versionLine protection
3VA1225-4GF42-0CA0 — 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
3VA1225-4GF42-0CA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM240
3VA1225-4GF42-0CA0 — Construction & Connection
ParameterValue
Main circuit connection typelug terminal
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1225-4GF42-0CA0 — Accessories & Functions
ParameterValue
Undervoltage releaseYes
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts0
3VA1225-4GF42-0CA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1225-4GF42-0CA0 — Mechanical
ParameterValue
Height158 mm
Width140 mm
Depth70 mm

Product details

It carries 121 kA interrupting capacity at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V — the 240 V figure is the one that governs most North American panel schedules, while the 415 V rating is the one for 400 V-class European distribution.

Above 50 °C it drops linearly to 223 A at 70 °C. That matters if the breaker sits near a heat source or in a non-ventilated enclosure; at 55 °C you still have 243.3 A, so a 250 A feeder is still viable in a warm cabinet. N-conductor protection is 100% rated, meaning the fourth pole handles full current, not a reduced neutral. No auxiliary contact version is fitted; if you need status feedback, the integrated undervoltage release (UVR) can be wired into a control circuit, or you add the optional auxiliary trip accessory 3VA9608-0BB24.

Latching endurance is 15,000 operations — not a switching breaker for frequent load making/breaking, but fine for infrequent manual isolation and fault clearing.

Frequently asked questions

What is the interrupting capacity at 415 V for this MCCB?

75.6 kA at 415 V, which covers most 400 V-class distribution systems. At 240 V it is 121 kA, at 440 V it is 25 kA, and at 690 V it is 11.9 kA.

Does this breaker include an undervoltage release?

Yes, an undervoltage release (UVR) is integrated. No auxiliary contacts or communication module are fitted.

What is the thermal derating above 50 °C?

Rated 250 A continuously from 40 °C to 50 °C. At 55 °C it derates to 243.3 A, at 60 °C to 236.5 A, at 65 °C to 229 A, and at 70 °C to 223 A.

Where can I buy 3VA1225-4GF42-0CA0?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3VA1225-4GF42-0CA0