The Siemens 3VA1225-6EF42-0BA0 is a SENTRON molded case circuit breaker rated 250 A continuous at 40 °C through 50 °C, then derating to 223 A at 70 °C. That thermal curve means the breaker holds full load at typical panel ambient; only above 55 °C does the TM240 trip unit start backing off. For a 4-pole line-protection device, the interrupting ratings span 220 kA at 240 V down to 17 kA at 690 V — so the SCCR headroom is there for high-fault commercial mains, but the 690 V tier is the one to check if you're feeding a 480 V or 600 V distribution bus.
Siemens 3VA1225-6EF42-0BA0 SENTRON MCCB, 250A, 4P, TM240
MPN3VA1225-6EF42-0BA0
Siemens SENTRON 3VA1225-6EF42-0BA0, molded case circuit breaker (MCCB), 250 A, 4-pole, TM240 thermal-magnetic trip, line protection design, with undervoltage release.
Source DocumentedChannel stated on listing & quote
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Worldwide DispatchDHL/FedEx — transit quoted per order
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. | 3VA12256EF420AA0 |
| 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 | H |
| Breaking capacity at 240 V | 220 kA |
| Breaking capacity at 415 V | 154 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. | 59.5 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 | Yes |
| Voltage trigger | No |
| Trip indicator | No |
| Communication function | No |
| Measurement function | No |
| Motor drive option | Yes |
| Auxiliary CO contacts | 0 |
| 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
Where can I buy 3VA1225-6EF42-0BA0 and how do I get a price?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm number.
Will 3VA1225-6EF42-0BA0 drop into a panel that was specified around 3VA1110-5ED36-0AC0 without rewiring?
Both are SENTRON 3VA frame MCCBs sharing the same 140 x 158 x 70 mm footprint, so the physical cutout and mounting pattern are identical. The difference is rating: the 3VA1225 carries 250 A continuous versus a lower frame on the 3VA1110. No busbar or lug relocation needed if the feeder conductors are sized for 250 A.
What is 3VA1225-6EF42-0BA0's listed depth?
70 mm (2.76 in) — standard for the 3VA frame depth.
What compliance documentation does this brand provide for 3VA1225-6EF42-0BA0?
As a Siemens SENTRON MCCB, the standard documentation package includes the manufacturer's declaration of conformity to IEC 60947-2, plus RoHS and REACH compliance statements. UL and CSA listings are typical for the 3VA series, though the specific agency marks for this order code should be confirmed from the nameplate or the manufacturer's certificate.
MPN
3VA1225-6EF42-0BA0