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Siemens 3VA1225-5FF42-0CA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1225-5FF42-0CA0 SENTRON MCCB, 125 A, 4-Pole, 70 m

MPN3VA1225-5FF42-0CA0

Siemens SENTRON 3VA1225-5FF42-0CA0, molded case circuit breaker, 4-pole, 125 A, TM240 thermal-magnetic release, undervoltage release, 70 mm depth.

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

3VA1225-5FF42-0CA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
Basic switch (supplied) ref.3VA12255FF420AA0
3VA1225-5FF42-0CA0 — Ratings
ParameterValue
Number of poles4
Rated operational voltage Ue (AC)690 V
Rated insulation voltage Ui800 V
Current at 40 °C250 A
Current at 45 °C250 A
Current at 50 °C250 A
Current at 55 °C243 A
Current at 60 °C237 A
Current at 65 °C230 A
Current at 70 °C223 A
Switching capacity classM
Breaking capacity at 240 V187 kA
Breaking capacity at 415 V121 kA
Breaking capacity at 440 V75.6 kA
Breaking capacity at 500 V30 kA
Breaking capacity at 690 V17 kA
Power loss, max.59.5 W
3VA1225-5FF42-0CA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM240
Overcurrent protection functionLI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA1225-5FF42-0CA0 — Construction & Connection
ParameterValue
Main circuit connection typenut keeper kit on both ends
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1225-5FF42-0CA0 — Accessories & Functions
ParameterValue
Undervoltage releaseYes
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts0
3VA1225-5FF42-0CA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1225-5FF42-0CA0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.20 000
Height158 mm
Width140 mm
Depth70 mm
Height (in)6.22 in
Width (in)5.51 in
Depth (in)2.76 in

Product details

Rated current and breaking capacity

Its breaking capacity steps with system voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V — so the available fault current at the panel's service entrance determines which voltage column governs the selection.

Thermal derating and power loss

Above that, derating is gradual: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. Maximum power loss is 59.5 W — a figure to budget for in enclosed panels where heat rise stacks across multiple devices.

Undervoltage release and auxiliary options

The base switch is 3VA12255FF420AA0; no communication function or ground-fault monitoring is fitted on this order code.

Environmental and insulation ratings

The storage minimum of -40 °C covers cold warehouse or unheated site storage before installation.

Frequently asked questions

What is the breaking capacity of 3VA1225-5FF42-0CA0 at 415 V?

At 415 V the breaking capacity is 121 kA. At 240 V it is 187 kA, and it decreases at higher voltages: 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V.

Where can I buy 3VA1225-5FF42-0CA0?

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

Does 3VA1225-5FF42-0CA0 include an undervoltage release?

Yes, it is fitted with an undervoltage release (UVR) as the auxiliary release type. No ground-fault monitoring or communication module is included on this variant.

MPN
3VA1225-5FF42-0CA0