{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5GF42-0AJ0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5GF42-0AJ0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5GF42-0AJ0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5GF42-0AJ0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5GF42-0AJ0, molded case circuit breaker, 4-pole, 250 A rated continuous current Iu, TM240 thermal-magnetic release, line protection version, IP40 front, 187 kA at 240 V, 121 kA at 415 V, 36 kA at 440 V, 17 kA at 690 V.","salesMarkdown":"## What this MCCB delivers It is a 4-pole unit configured for line protection — meaning it sits at the feeder or main disconnect position in a distribution panel, not on a motor branch. The interrupting ratings are substantial: 187 kA at 240 V AC, 121 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V. Operating temperature range is -25 °C to 70 °C; above 50 °C the continuous current derates from 250 A down to 223 A at 70 °C. Dimensions: 70 mm deep, 140 mm wide, 158 mm tall. The breaker accepts a 100 % rated N-conductor (full-size neutral), so it can serve as the main disconnect in a 4-wire system without derating the neutral path. ## What the TM240 release means on a real line The TM240 designation means the thermal-magnetic trip unit is calibrated for a 250 A frame. There is no ground-fault monitoring, no phase-failure detection, and no communication function on this variant. If your application requires adjustable long-time pickup, short-time delay, or ground-fault alarm, you would need a 3VA with an electronic trip unit (ETU) — this is the fixed-setting thermal-magnetic version, which is simpler and more robust for basic feeder protection where coordination studies are already set.","metaTitle":"Siemens 3VA1225-5GF42-0AJ0 SENTRON MCCB, 250 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA1225-5GF42-0AJ0 molded case circuit breaker, 250 A rated, 4-pole, TM240 release. 187 kA at 240 V, 121 kA at 415 V. IP40 front. Current production. Quoted to orde","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","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"36 kA","at 690 V":"17 kA","at 40 °C":"250 A","at 45 °C":"250 A","at 50 °C":"250 A","at 55 °C":"243.3 A","at 60 °C":"236.5 A","at 65 °C":"229 A","at 70 °C":"223 A","Trip indicator":"Yes","Number of poles":"4","Product version":"Line protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches + 1 trip alarm switch HP","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"250 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"without auxiliaryrelease","Ground fault monitoring version":"Without","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%","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"600 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"250 A","Adjustable response value current / li max.":"2 500 A","Adjustable response value current / li min.":"1 250 A","Adjustable response value current / lr min.":"175 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"3","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB11","Switching capacity class of the circuit breaker":"M","Max. rated operational current of the frame size":"250 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"25 x 8","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1"}},"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=568743&mlfb=3VA1225-5GF42-0AJ0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5GF42-0AJ0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3VA1225-5GF42-0AJ0 and what is the lead time?","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 lead-time number is published here."},{"question":"What are the key interrupting ratings for this MCCB?","answer":"187 kA at 240 V AC, 121 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V. These are the short-circuit breaking capacities at the respective voltages."},{"question":"Does the 3VA1225-5GF42-0AJ0 include auxiliary contacts?","answer":"Yes, it comes with 2 auxiliary switches and 1 trip alarm switch (HP type) as standard. No additional accessory block is needed for basic status feedback."},{"question":"What is the operating temperature range and derating?","answer":"Operating range is -25 °C to 70 °C. The breaker carries full 250 A up to 50 °C; at 55 °C it derates to 243.3 A, at 60 °C to 236.5 A, at 65 °C to 229 A, and at 70 °C to 223 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5GF42-0AJ0","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/3VA1225-5GF42-0AJ0 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}}