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Siemens 3VM1225-4ED42-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VM1225-4ED42-0AA0 SENTRON MCCB, 250 A, 4-Pole, 121

MPN3VM1225-4ED42-0AA0
Active

Siemens SENTRON 3VM1225-4ED42-0AA0, molded case circuit breaker, 250 A rated at 40 °C, 4-pole, TM210 thermal-magnetic trip, 121 kA breaking capacity at 240 V AC.

Siemens 3VM1225-4ED42-0AA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3VM1225-4ED42-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
Product versionLine protection
3VM1225-4ED42-0AA0 — Ratings
ParameterValue
Number of poles4
Rated operational voltage Ue (AC)690 V
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 °C229.8 A
Current at 70 °C223 A
Switching capacity classS
Breaking capacity at 240 V121 kA
Breaking capacity at 415 V76 kA
Breaking capacity at 440 V53 kA
Breaking capacity at 500 V17 kA
Power loss, max.57 W
3VM1225-4ED42-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM210
Overcurrent protection functionLI
Ground-fault monitoringWithout
3VM1225-4ED42-0AA0 — Construction & Connection
ParameterValue
Main circuit connector arrangementFront connection
Protection class (IP), frontIP40
3VM1225-4ED42-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionNo
Auxiliary CO contacts0
3VM1225-4ED42-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VM1225-4ED42-0AA0 — Mechanical
ParameterValue
Height158 mm
Width140 mm
Depth70 mm
Height (in)6.22 in
Width (in)5.51 in
Depth (in)2.76 in

Product details

SENTRON 3VM1225-4ED42-0AA0 — 250 A MCCB, Line Protection, TM210 Trip

Breaking capacity is rated by system voltage: 121 kA at 240 V AC, 76 kA at 415 V AC, 53 kA at 440 V AC, and 17 kA at 500 V AC. It is a straightforward thermal-magnetic breaker — no auxiliaries, no shunt trip, no voltage-triggered accessories.

Above that, the TM210 trip unit begins to derate: 243.3 A at 55 °C, 236.5 A at 60 °C, 229.8 A at 65 °C, and 223 A at 70 °C. For a panel OEM wireman, this means the breaker can be installed in a warm enclosure — up to 50 °C — without losing any ampacity. Above 50 °C, the derating curve is linear enough to calculate the effective rating for the actual ambient. Maximum power loss is 57 W. This is the heat the breaker dissipates at full rated current; it feeds into the enclosure thermal calculation.

The DC rating of 500 V makes it usable in some DC distribution applications, though the breaking capacity in DC systems must be verified against the 3VA manual.

Frequently asked questions

What are the key ratings for 3VM1225-4ED42-0AA0?

Rated 250 A continuous at 40 °C, 4-pole, with a TM210 thermal-magnetic trip unit. Breaking capacity is 121 kA at 240 V AC, 76 kA at 415 V AC, 53 kA at 440 V AC, and 17 kA at 500 V AC. Rated insulation voltage is 800 V, max operational voltage 690 V AC or 500 V DC.

What is the physical size of 3VM1225-4ED42-0AA0?

Width 140 mm, height 158 mm, depth 70 mm. The 140 mm width occupies four 35 mm DIN-rail module spaces.

How do I get current pricing and availability for 3VM1225-4ED42-0AA0?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What compliance documentation does Siemens provide for 3VM1225-4ED42-0AA0?

As a SENTRON series MCCB, the 3VM1225-4ED42-0AA0 carries CE marking for the European market and is designed to meet IEC 60947-2. UL and CSA listings are standard for the 3VM family; specific certification markings should be verified on the nameplate or declaration of conformity.

MPN
3VM1225-4ED42-0AA0