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Siemens 3VA1225-5FF42-0KC0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1225-5FF42-0KC0 SENTRON MCCB, 125 A, 4-Pole, 187

MPN3VA1225-5FF42-0KC0

Siemens SENTRON 3VA1225-5FF42-0KC0, molded case circuit breaker, 4-pole, 125 A, breaking capacity 187 kA at 240 V AC, line protection design with shunt trip and 2 auxiliary switches.

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

3VA1225-5FF42-0KC0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
Basic switch (supplied) ref.3VA12255FF420AA0
Integrated auxiliary / alarm switch ref.3VA9988-0AA12
3VA1225-5FF42-0KC0 — 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.57 W
3VA1225-5FF42-0KC0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM240
Overcurrent protection functionLI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA1225-5FF42-0KC0 — Construction & Connection
ParameterValue
Main circuit connection typenut keeper kit on both ends
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1225-5FF42-0KC0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerYes
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts2
3VA1225-5FF42-0KC0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1225-5FF42-0KC0 — 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

MCCB for line protection — 125 A, 4-pole, high breaking capacity

The Siemens SENTRON 3VA1225-5FF42-0KC0 is a 4-pole molded case circuit breaker rated at 125 A continuous, designed for line protection in distribution panels. Its breaking capacity reaches 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V — figures that cover most industrial fault-current scenarios without needing an upstream current-limiting fuse.

The breaker holds 250 A continuously at ambient temperatures up to 50 °C, then derates linearly to 223 A at 70 °C — critical when the breaker shares an enclosure with other heat sources. Operating range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. Dimensions are 70 mm deep, 140 mm wide, 158 mm high — a standard 4-pole MCCB footprint for DIN-rail or screw-mount panel integration.

Frequently asked questions

How do I get current pricing and availability for 3VA1225-5FF42-0KC0?

Submit an RFQ against this order code. Availability and current pricing are confirmed at quote time through independent distribution.

What are the key ratings of 3VA1225-5FF42-0KC0?

Rated 125 A continuous, 4-pole, breaking capacity 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. Rated insulation voltage 800 V. Includes shunt trip and two auxiliary switches.

What compliance documentation does Siemens provide for 3VA1225-5FF42-0KC0?

Siemens provides RoHS, REACH, and IEC/UL certification documentation for the SENTRON 3VA series. Full declarations of conformity are available on request.

MPN
3VA1225-5FF42-0KC0