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Siemens 3VA1225-5FF42-0DH0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1225-5FF42-0DH0 SENTRON MCCB, 125 A, 4-Pole, 70 m

MPN3VA1225-5FF42-0DH0

Siemens SENTRON 3VA1225-5FF42-0DH0, molded case circuit breaker, 125 A, 4-pole, line protection, 70 mm depth, 140 mm width, 158 mm height.

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

3VA1225-5FF42-0DH0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
Basic switch (supplied) ref.3VA12255FF420AA0
Integrated auxiliary / alarm switch ref.3VA9988-0AB12
3VA1225-5FF42-0DH0 — 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
3VA1225-5FF42-0DH0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM240
Overcurrent protection functionLI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA1225-5FF42-0DH0 — Construction & Connection
ParameterValue
Main circuit connection typenut keeper kit on both ends
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1225-5FF42-0DH0 — Accessories & Functions
ParameterValue
Undervoltage releaseYes
Voltage triggerNo
Trip indicatorYes
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts3
3VA1225-5FF42-0DH0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1225-5FF42-0DH0 — 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

Siemens 3VA1225-5FF42-0DH0 — 125 A SENTRON MCCB for Line Protection

Its interrupting capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V — figures that govern selectivity coordination with downstream breakers.

The breaker carries 250 A up to 50 °C ambient, then derates linearly: 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 — relevant for enclosure heat-rise calculations when grouping multiple breakers in a panel.

Auxiliary Switching and Releases

The trip indicator provides local visual status. The basic switch variant is 3VA12255FF420AA0.

Frequently asked questions

Where can I buy 3VA1225-5FF42-0DH0 and what is the lead time?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here.

What is the interrupting capacity of 3VA1225-5FF42-0DH0 at different voltages?

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 (–). These values determine selectivity with upstream and downstream breakers.

Does 3VA1225-5FF42-0DH0 include an undervoltage release?

Yes, it is factory-fitted with an undervoltage release (UVR), plus 2 auxiliary switches and 1 trip alarm switch (HQ type).

What are the physical dimensions of 3VA1225-5FF42-0DH0?

Depth 70 mm, width 140 mm, height 158 mm (–). These are the overall body dimensions for panel cutout and enclosure planning.

MPN
3VA1225-5FF42-0DH0