The Siemens SENTRON 3VA1225-5EF42-0AJ0 is a 4-pole molded case circuit breaker rated 250 A continuous at 40 °C, with a TM240 thermal-magnetic overcurrent release. That 250 A holds flat through 50 °C; above that it derates to 243 A at 55 °C and 223 A at 70 °C, so in a warm panel you still have headroom for a full 250 A load up to 50 °C ambient. Interrupting capacity is 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V — numbers that put it in the high-fault tier for a 250 A frame.
Siemens 3VA1225-5EF42-0AJ0 SENTRON MCCB, 250 A, 4-Pole, 187
MPN3VA1225-5EF42-0AJ0
Siemens SENTRON 3VA1225-5EF42-0AJ0, 4-pole molded case circuit breaker, 250 A continuous at 40 °C, TM240 thermal-magnetic trip, 187 kA interrupting 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. | 3VA12255EF420AA0 |
| Integrated auxiliary / alarm switch ref. | 3VA9988-0AB11 |
| 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 | M |
| Breaking capacity at 240 V | 187 kA |
| Breaking capacity at 415 V | 121 kA |
| Breaking capacity at 440 V | 75.6 kA |
| Breaking capacity at 500 V | 30 kA |
| Breaking capacity at 690 V | 17 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 | Yes |
| Communication function | No |
| Measurement function | No |
| Motor drive option | Yes |
| Auxiliary CO contacts | 3 |
| 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
How do I get current pricing and availability for 3VA1225-5EF42-0AJ0?
Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through our independent distribution network.
What is the interrupting capacity of this MCCB at 240 V?
187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V — high-fault ratings for a 250 A frame.
MPN
3VA1225-5EF42-0AJ0