{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5GF42-0AF0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5GF42-0AF0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5GF42-0AF0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5GF42-0AF0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5GF42-0AF0, molded case circuit breaker, 4-pole, 250 A, TM240 thermal-magnetic release, line protection, interrupting ratings 187 kA at 240 V AC, 121 kA at 415 V AC.","salesMarkdown":"## What the interrupting ratings mean for your fault-current study Its interrupting capacity varies sharply with system voltage: 187 kA at 240 V AC, 121 kA at 415 V AC, 36 kA at 440 V AC, and 17 kA at 690 V AC. At 415 V, the 121 kA rating still covers most distribution boards fed by a 2 MVA-class transformer; the drop to 36 kA at 440 V reflects the physics of arc extinction at higher voltage, so verify your available fault current at the actual line voltage, not the nominal. ## Thermal derating and panel fill factor Above that, it derates linearly: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C. ## Auxiliary contacts and release options The overcurrent release is the TM240 thermal-magnetic type, which means it uses a bimetal for overload protection and a solenoid for short-circuit response — no electronic adjustment, but also no auxiliary power draw and no nuisance tripping from harmonics.","metaTitle":"Siemens 3VA1225-5GF42-0AF0 SENTRON MCCB, 250 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA1225-5GF42-0AF0 molded case circuit breaker, 250 A rated continuous current, 4-pole, TM240 release, interrupting ratings up to 187 kA at 240 V. Active production","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","title":"3VA1225-5GF42-0AF0","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","description":"circuit breaker 3VA1 IEC frame 250 breaking capacity class M Icu=55kA @ 415V 4-pole, line protection TM240, ATAM, In=250A overload protection Ir=175A...250A short-circuit protection Ii=5...10 x In N conductor protection 100% nut keeper kit 1 auxiliary switch HQ 1 trip alarm switch HQ","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":"1 auxiliary switch + 1 trip alarm switch HQ","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":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3c1f9a5028f3bf7dbcd70ba979a45afb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=568740&mlfb=3VA1225-5GF42-0AF0"},"ai":{"faq":[{"question":"What is the interrupting rating of this MCCB at 415 V?","answer":"At 415 V AC, the interrupting rating is 121 kA. At 240 V it is 187 kA, at 440 V it is 36 kA, and at 690 V it is 17 kA."},{"question":"Where can I buy 3VA1225-5GF42-0AF0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Does this breaker include a neutral conductor protection?","answer":"Yes, the N-conductor protection is designed for 100% rated neutral — the fourth pole is fully rated to carry and interrupt the same current as the phase poles."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5GF42-0AF0","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/3VA1225-5GF42-0AF0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}