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Siemens 3VA1225-5FF42-0DC0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1225-5FF42-0DC0 SENTRON MCCB, 125 A, 4-Pole, 187

MPN3VA1225-5FF42-0DC0

Siemens SENTRON 3VA1225-5FF42-0DC0, molded case circuit breaker, 125 A, 4-pole, 187 kA interrupting capacity at 240 V AC, with undervoltage release.

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

3VA1225-5FF42-0DC0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
Basic switch (supplied) ref.3VA12255FF420AA0
Integrated auxiliary / alarm switch ref.3VA9988-0AA12
3VA1225-5FF42-0DC0 — 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
3VA1225-5FF42-0DC0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM240
Overcurrent protection functionLI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA1225-5FF42-0DC0 — Construction & Connection
ParameterValue
Main circuit connection typenut keeper kit on both ends
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1225-5FF42-0DC0 — Accessories & Functions
ParameterValue
Undervoltage releaseYes
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts2
3VA1225-5FF42-0DC0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1225-5FF42-0DC0 — 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

125 A MCCB with high interrupting capacity

The 4-pole design makes this unit suitable for three-phase plus neutral protection in TN or TT systems, or for dual-feed applications where all poles need coordinated interruption.

The breaker's 125 A rating holds up to 50 °C ambient (–). Above that, it derates linearly: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C (–). The 59.5 W maximum power loss needs ventilation in a tight cabinet; a 140 mm wide × 158 mm tall × 70 mm deep footprint fits standard MCCB cutouts but watch the depth for gland-plate clearance.

Frequently asked questions

Where can I buy 3VA1225-5FF42-0DC0 and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time.

What is the interrupting capacity of 3VA1225-5FF42-0DC0 at different voltages?

At 240 V it interrupts 187 kA, at 415 V it interrupts 121 kA, at 440 V it interrupts 75.6 kA, at 500 V it interrupts 30 kA, and at 690 V it interrupts 17 kA (–).

Does 3VA1225-5FF42-0DC0 include an undervoltage release?

Yes, it is equipped with an undervoltage release (UVR) as standard.

MPN
3VA1225-5FF42-0DC0