{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1150-4EF32-0BC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1150-4EF32-0BC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1150-4EF32-0BC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1150-4EF32-0BC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1150-4EF32-0BC0, 3-pole molded case circuit breaker (MCCB), line protection, rated continuous current Iu 50 A, TM240 thermal-magnetic overcurrent release, breaking capacity 121 kA at 240 V AC, 75.6 kA at 415 V AC, 52.5 kA at 440 V AC, 11.9 kA at 690 V AC.","salesMarkdown":"The Siemens 3VA1150-4EF32-0BC0 is a 3-pole SENTRON molded case circuit breaker rated for 50 A continuous current (Iu) with a TM240 thermal-magnetic release. The TM240 designation means the thermal element is fixed at 240 A frame rating, with the magnetic pickup set to a multiple of that — so this breaker protects a 50 A circuit on a 240 A frame, giving headroom for high inrush without nuisance trips on motor starts or transformer energization. Breaking capacity runs 121 kA at 240 V AC, 75.6 kA at 415 V AC, 52.5 kA at 440 V AC, and 11.9 kA at 690 V AC. That 121 kA figure at 240 V handles high-fault utility feeds; the 75.6 kA at 415 V covers most European industrial distribution panels. At 690 V the 11.9 kA still exceeds typical motor-circuit fault levels in North American 600 V class systems. This is standard for safety circuits where a loss of control voltage must open the main disconnect. ## Thermal derating — what the 50 A rating actually means at panel temperature The 50 A rating holds from 40 °C through 50 °C ambient. At 55 °C it derates to 48 A; at 60 °C to 47 A; at 65 °C to 46 A; at 70 °C to 45 A. If the MCCB sits inside a sealed enclosure with other heat sources — typical in a motor control center — the 45 A floor at 70 °C is the number to design against, not the catalog 50 A. The thermal curve is published; plan the load at the actual panel ambient, not the nameplate. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm high. The 76.2 mm width is a standard 3-pole MCCB footprint.","metaTitle":"Siemens 3VA1150-4EF32-0BC0 SENTRON MCCB, 50 A, TM240, 121 kA","metaDescription":"Siemens 3VA1150-4EF32-0BC0 SENTRON molded case circuit breaker, 50 A rated continuous current, TM240 thermal-magnetic release, 121 kA breaking capacity 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":"76.2 mm","Height":"130 mm","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 690 V":"11.9 kA","at 40 °C":"50 A","at 45 °C":"50 A","at 50 °C":"50 A","at 55 °C":"48 A","at 60 °C":"47 A","at 65 °C":"46 A","at 70 °C":"45 A","Trip indicator":"No","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 HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"50 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":"3VA9608-0BB11","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.":"50 A","Adjustable response value current / li max.":"500 A","Adjustable response value current / li min.":"250 A","Adjustable response value current / lr min.":"35 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":"3VA9988-0AA12","Switching capacity class of the circuit breaker":"S","Max. rated operational current of the frame size":"160 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.":"17 x 6.5","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 0"}},"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=6746&mlfb=3VA1150-4EF32-0BC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1150-4EF32-0BC0/alternatives.json"},"ai":{"faq":[{"question":"Does this MCCB include an undervoltage release?","answer":"Yes, an undervoltage release (UVR) is integrated as part of the auxiliary release design. Two auxiliary switches (HQ type) are also built in."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1150-4EF32-0BC0","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/3VA1150-4EF32-0BC0 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}}