{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4EF32-0CH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4EF32-0CH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0CH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0CH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4EF32-0CH0, molded case circuit breaker, 3-pole, 250 A rated continuous current (Iu), TM240 thermal-magnetic overcurrent release, breaking capacity 121 kA at 240 V AC, 75.6 kA at 415 V AC.","salesMarkdown":"At 240 V it interrupts 121 kA; at 415 V that drops to 75.6 kA, and at 690 V it still clears 11.9 kA — so this breaker is sized for high-fault industrial distribution, not light commercial subfeeds. It's a 3-pole unit, line protection version (no voltage trigger, no ground-fault monitoring), with an undervoltage release built in and a 2-auxiliary-switch-plus-1-trip-alarm contact block onboard. ## Thermal derating — the real-world current At 55 °C it starts to taper: 243.3 A. By 70 °C you're down to 223 A. ## Footprint and integration The can measures 105 mm wide by 158 mm tall by 70 mm deep — a standard 3-pole MCCB footprint for a 250 A frame. Bolts onto a mounting plate or into a fixed chassis; no DIN-rail clip on this frame class. The undervoltage release coil draws its signal from a separate control circuit, so plan for an extra pair of wires back to the control transformer or UPS.","metaTitle":"Siemens 3VA1225-4EF32-0CH0 SENTRON MCCB, 250 A, 3-Pole, TM24","metaDescription":"Siemens 3VA1225-4EF32-0CH0 SENTRON molded case circuit breaker, 250 A rated continuous current, 3-pole, TM240 thermal-magnetic release. Breaking capacity 121 kA at 240 V. Active pr","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"105 mm","Height":"158 mm","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"25 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":"243.3 A","at 60 °C":"236.5 A","at 65 °C":"229 A","at 70 °C":"223 A","Trip indicator":"Yes","Number of poles":"3","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":"Yes","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 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":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB24","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","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":"500 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":"3VA9988-0AB12","Switching capacity class of the circuit breaker":"S","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=568493&mlfb=3VA1225-4EF32-0CH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0CH0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at 415 V?","answer":"75.6 kA at 415 V AC, per the spec table."},{"question":"Where can I buy 3VA1225-4EF32-0CH0?","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":"What does the TM240 release mean?","answer":"TM240 is a thermal-magnetic release rated for 250 A continuous; the '240' refers to the frame size / trip unit rating, not the amp setting. It provides inverse-time overload protection plus instantaneous magnetic short-circuit protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0CH0","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/3VA1225-4EF32-0CH0 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}}