{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4GF42-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4GF42-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4GF42-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4GF42-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON molded case circuit breaker, 3VA1225-4GF42-0AC0, 250 A, 4-pole, TM240 thermal-magnetic release, 70 mm depth, line protection.","salesMarkdown":"## 250 A MCCB with TM240 release — selectivity and SCCR planning Breaking capacity runs 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 — enough headroom for most industrial service-entrance and sub-distribution applications where fault current is high. No field-adjustable electronic trip unit here — it's a straightforward overcurrent protector for fixed-load feeders or main breakers where you don't need LSIG or ground-fault options. ## Thermal derating and power dissipation Rated 250 A continuous up to 50 °C ambient. Above that, derate 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 57 W at rated current. Dimensions: 70 mm deep, 140 mm wide, 158 mm tall. The 70 mm depth is relatively shallow for a 250 A frame — useful when gland-plate clearance or enclosure depth is tight. Insulation voltage rated 800 V.","metaTitle":"3VA1225-4GF42-0AC0 SENTRON MCCB, 250 A, 4-Pole, TM240, 70 mm","metaDescription":"Siemens SENTRON 3VA1225-4GF42-0AC0 molded case circuit breaker, 250 A, 4-pole, TM240 release, 121 kA at 240 V. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"140 mm","Height":"158 mm","Maximum":"250 A","Minimum":"250 A","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"17 kA","at 690 V":"11.9 kA","at 40 °C":"250 A","at 45 °C":"250 A","at 50 °C":"250 A","at 55 °C":"243 A","at 60 °C":"237 A","at 65 °C":"230 A","at 70 °C":"223 A","Depth [In]":"2.76 in","Width [In]":"5.51 in","Height [In]":"6.22 in","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"57 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA12254GF420AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"TM240","Design Of Short-Circuit Protection":"For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter","protection class IP / on the front":"IP40","design of the N-conductor protection":"100%","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching Capacity Class Of The Circuit Breaker":"S","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=568533&mlfb=3VA1225-4GF42-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4GF42-0AC0/alternatives.json"},"ai":{"faq":[{"question":"What does the TM240 release mean on this breaker?","answer":"TM240 is a fixed thermal-magnetic overcurrent release factory-set for the 250 A frame. It provides thermal protection for overloads and magnetic protection for short circuits, with no field-adjustable trip settings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4GF42-0AC0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3VA1225-4GF42-0AC0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}