{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1150-4EF32-0KC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1150-4EF32-0KC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1150-4EF32-0KC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1150-4EF32-0KC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1150-4EF32-0KC0, 3-pole molded case circuit breaker, 50 A rated continuous current, 121 kA breaking capacity at 240 V, line protection version with TM240 thermal-magnetic release and shunt trip.","salesMarkdown":"The Siemens SENTRON 3VA1150-4EF32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for 50 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release and an integrated shunt trip (STL) auxiliary release. It's a line-protection device — meaning it's set up for feeder and distribution duty, not motor branch-circuit protection. The 70 mm depth, 76.2 mm width, and 130 mm height footprint fits standard SENTRON 3VA panel cutouts and bus-bar layouts. The IP40 front protection means it's fine inside a closed enclosure — not for washdown areas. This MCCB delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. Those are the interrupting ratings (Icu) at each voltage level — the fault current it can safely clear without welding or rupturing. For a 480 V panel fed from a 100 kA transformer, the 52.5 kA at 440 V tells you this breaker has headroom for most common fault levels at that voltage. ## Current derating — the real-world continuous current At 55 °C it drops to 48 A, at 60 °C to 47 A, at 65 °C to 46 A, and at 70 °C to 45 A. ## Auxiliary contacts and shunt trip The breaker comes with 2 auxiliary switches (HQ type) for status feedback — open/closed indication to a PLC or remote monitoring system. The shunt trip (STL) allows remote tripping via a control voltage, useful for emergency-stop circuits or supervisory shutdown.","metaTitle":"Siemens SENTRON 3VA1150-4EF32-0KC0 MCCB, 50 A, 121 kA at 240","metaDescription":"Siemens 3VA1150-4EF32-0KC0 SENTRON molded case circuit breaker, 3-pole, 50 A rated, 121 kA breaking capacity at 240 V. Sourced 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":"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":"Yes","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 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":"Shunt trip (STL)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9688-0BL33","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=461323&mlfb=3VA1150-4EF32-0KC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1150-4EF32-0KC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3VA1150-4EF32-0KC0?","answer":"Sourced to order against an RFQ through our independent distribution channel. Availability and current pricing are confirmed at quote time."},{"question":"What is the depth of this MCCB?","answer":"70 mm depth, 76.2 mm width, 130 mm height."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1150-4EF32-0KC0","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/3VA1150-4EF32-0KC0 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}}