{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5GF42-0CA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5GF42-0CA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5GF42-0CA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5GF42-0CA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5GF42-0CA0, molded case circuit breaker, 4-pole, 250 A, TM240 overcurrent release, undervoltage release, line protection design.","salesMarkdown":"## Rated current and breaking capacity — the numbers that govern fit That 250 A rating holds flat 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 — so in a warm panel you lose about 11 % of capacity at the top end. Breaking capacity is voltage-dependent: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. The 140 mm width for a 4-pole frame is standard for this class; it occupies roughly the same footprint as other SENTRON 3VA fixed-thermal breakers in the 250 A range. ## Undervoltage release and line protection design That is a common requirement for motor feeders where you want automatic disconnection on loss of control power. The product design is line protection, meaning the TM240 release curve is optimized for cable and busbar protection rather than motor or generator protection. Maximum power loss is 59.5 W at rated current. That is the heat the breaker dumps into the enclosure — factor it into your panel thermal calculation, especially if the MCCB is mounted alongside other high-current devices in a sealed cabinet.","metaTitle":"Siemens 3VA1225-5GF42-0CA0 SENTRON MCCB, 250 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA1225-5GF42-0CA0 molded case circuit breaker, 250 A, 4-pole, 187 kA at 240 V. TM240 release, undervoltage release. Quoted to order against RFQ.","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":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"30 kA","at 690 V":"17 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":"Yes","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"59.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA12255GF420AA0","Design Of The Auxiliary Release":"undervoltage release (UVR)","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%","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB24","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":"0","Switching Capacity Class Of The Circuit Breaker":"M","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=568789&mlfb=3VA1225-5GF42-0CA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5GF42-0CA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1225-5GF42-0CA0 at 415 V?","answer":"121 kA at 415 V. That is the key figure for most 400 V class industrial panels. At 240 V it is 187 kA; at 690 V it is 17 kA."},{"question":"Does 3VA1225-5GF42-0CA0 include an undervoltage release?","answer":"Yes, it includes an undervoltage release (UVR) as the auxiliary release. The breaker trips on loss of control voltage."},{"question":"Where can I buy 3VA1225-5GF42-0CA0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is listed here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5GF42-0CA0","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/3VA1225-5GF42-0CA0 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}}