Rated current holds at 250 A from 40 °C through 50 °C ambient, then derates to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. If your enclosure runs hot — say a non-ventilated panel near a furnace line — use the 55 °C or 60 °C column for sizing, not the 40 °C figure. Breaking capacity steps down with system voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V. At 480 V systems (common in North America) the 415 V or 440 V rating is the relevant bound — confirm your available fault current is below the applicable curve. Physical footprint: 140 mm wide, 158 mm high, 70 mm deep.
Siemens 3VA1225-4EF42-0AC0 SENTRON MCCB, 250A, 4-Pole, 121kA
MPN3VA1225-4EF42-0AC0
Siemens SENTRON 3VA1225-4EF42-0AC0, molded case circuit breaker, 4-pole, TM240 overcurrent release, rated 250 A at 40 °C, breaking capacity 121 kA at 240 V.
Source DocumentedChannel stated on listing & quote
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Product designation | Molded case circuit breaker |
| Brand / range | SENTRON |
| Basic switch (supplied) ref. | 3VA12254EF420AA0 |
| Integrated auxiliary / alarm switch ref. | 3VA9988-0AA12 |
| Parameter | Value |
|---|---|
| Number of poles | 4 |
| Rated operational voltage Ue (AC) | 690 V |
| Rated insulation voltage Ui | 800 V |
| Current at 40 °C | 250 A |
| Current at 45 °C | 250 A |
| Current at 50 °C | 250 A |
| Current at 55 °C | 243 A |
| Current at 60 °C | 237 A |
| Current at 65 °C | 230 A |
| Current at 70 °C | 223 A |
| Switching capacity class | S |
| Breaking capacity at 240 V | 121 kA |
| Breaking capacity at 415 V | 75.6 kA |
| Breaking capacity at 440 V | 52.5 kA |
| Breaking capacity at 500 V | 17 kA |
| Breaking capacity at 690 V | 11.9 kA |
| Power loss, max. | 57 W |
| Parameter | Value |
|---|---|
| Overcurrent release (trip unit) type | TM240 |
| Overcurrent protection function | LI |
| Ground-fault monitoring | Without |
| Grounding protection function | No |
| Parameter | Value |
|---|---|
| Main circuit connection type | nut keeper kit on both ends |
| Main circuit connector arrangement | Front terminal |
| Protection class (IP), front | IP40 |
| Parameter | Value |
|---|---|
| Undervoltage release | No |
| Voltage trigger | No |
| Trip indicator | No |
| Communication function | No |
| Measurement function | No |
| Motor drive option | Yes |
| Auxiliary CO contacts | 2 |
| Parameter | Value |
|---|---|
| Operating temperature, max. | 70 °C |
| Operating temperature, min. | -25 °C |
| Storage temperature, max. | 80 °C |
| Storage temperature, min. | -40 °C |
| Parameter | Value |
|---|---|
| Mechanical service life (operating cycles), typ. | 20 000 |
| Height | 158 mm |
| Width | 140 mm |
| Depth | 70 mm |
| Height (in) | 6.22 in |
| Width (in) | 5.51 in |
| Depth (in) | 2.76 in |
Product details
Frequently asked questions
What is the breaking capacity of this MCCB at different voltages?
Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V.
How does the 3VA1225-4EF42-0AC0 compare to the 3VA1110-5ED36-0AC0?
The 3VA1110-5ED36-0AC0 is a lower-current frame (100 A class) versus the 250 A frame here. The 3VA1225-4EF42-0AC0 uses a TM240 release and has a 4-pole construction; the 3VA1110-5ED36-0AC0 is a 3-pole unit with a different trip curve. They share the SENTRON platform but are not drop-in substitutes — the physical width and mounting hole pattern differ.
Where can I buy 3VA1225-4EF42-0AC0 and get current pricing?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm price and lead time.
MPN
3VA1225-4EF42-0AC0