{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1050-3ED42-0BH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1050-3ED42-0BH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1050-3ED42-0BH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1050-3ED42-0BH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1050-3ED42-0BH0, 4-pole molded case circuit breaker, 50 A rated continuous current (Iu), 75.6 kA breaking capacity at 240 V, line protection version with TM210 thermal-magnetic release and undervoltage release.","salesMarkdown":"The 3VA1050-3ED42-0BH0 is a Siemens SENTRON 4-pole molded case circuit breaker (MCCB) rated for 50 A continuous current (Iu) at 40 °C, carrying that rating flat through 50 °C before a gentle thermal derating curve — 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, 45 A at 70 °C. That means for a panel running at a 50 °C ambient, the breaker still handles a full 50 A load without nuisance tripping; only above 50 °C does the thermal-magnetic TM210 release start backing off. The 75.6 kA interrupting rating at 240 V (52.5 kA at 415 V, 32 kA at 440 V, 7.5 kA at 690 V) tells you this breaker can safely clear a fault up to that level without rupturing or welding contacts — critical for high-fault-capacity distribution panels where upstream transformer size drives available fault current. The 800 V rated insulation voltage (Ui) and IP40 front protection suit it for installation in a standard IP54 or IP65 enclosure — the front face is protected against solid objects over 1 mm, but the terminals are not sealed, so it belongs behind a gland plate or enclosure door. The 15 000 mechanical endurance cycles (latching endurance) indicate the mechanism is rated for that many open-close operations under no-load conditions; for frequent switching under load, factor in the electrical endurance which is typically lower. At 70 mm deep, 101.6 mm wide, and 130 mm tall, this MCCB fits a standard DIN-rail or panel-mount footprint common to the SENTRON 3VA platform. That alarm contact is useful for remote fault annunciation without wiring through the PLC input logic. This is standard for machinery safety circuits where loss of control power must remove line power. The TM210 thermal-magnetic release provides fixed thermal (overload) and magnetic (short-circuit) protection; there is no electronic adjustment or communication function on this variant, so it is a straight line-protection device, not a power-monitoring or selective-coordination breaker.","metaTitle":"Siemens 3VA1050-3ED42-0BH0 SENTRON MCCB, 50 A, 4-Pole, 75.6","metaDescription":"Siemens SENTRON 3VA1050-3ED42-0BH0 molded case circuit breaker, 50 A rated, 4-pole, 75.6 kA at 240 V. Current lifecycle. 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":"101.6 mm","Height":"130 mm","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 690 V":"7.5 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":"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":"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":"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":"TM210","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":"Without","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":"No","Adjustable response value current / Ir max.":"50 A","Adjustable response value current / li max.":"500 A","Adjustable response value current / li min.":"500 A","Adjustable response value current / lr min.":"50 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":"N","Max. rated operational current of the frame size":"100 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=70723&mlfb=3VA1050-3ED42-0BH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1050-3ED42-0BH0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at different voltages?","answer":"75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. The interrupting rating drops as voltage rises, which is typical for molded case breakers."},{"question":"Where can I buy 3VA1050-3ED42-0BH0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm position."},{"question":"What is the temperature derating for this breaker?","answer":"Rated 50 A continuous from 40 °C through 50 °C. Above 50 °C it derates: 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, 45 A at 70 °C. Below 50 °C, no derating applies."},{"question":"Does this MCCB have an undervoltage release?","answer":"Yes, it includes a built-in undervoltage release (UVR) that trips the breaker when control voltage drops below the dropout threshold — standard for safety circuits requiring loss-of-power disconnection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1050-3ED42-0BH0","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/3VA1050-3ED42-0BH0 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}}