{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1050-4ED42-0JH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1050-4ED42-0JH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1050-4ED42-0JH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1050-4ED42-0JH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1050-4ED42-0JH0, molded case circuit breaker, 4-pole, 50 A rated continuous current Iu, line protection version, 70 mm depth, 101.6 mm width, 130 mm height.","salesMarkdown":"It carries a rated continuous current Iu of 50 A across four poles, with a rated insulation voltage Ui of 800 V — meaning it handles 400 V three-phase distribution without issue and has headroom for 690 V applications where the breaking capacity still holds at 11.9 kA. Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — figures that cover most industrial low-voltage fault levels downstream of a transformer. The 50 A frame is thermally rated; it holds full current up to 50 °C ambient, then derates to 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. In a cement plant control room that hits 55 °C in summer, you lose 2 A — not enough to nuisance-trip a 45 A motor feeder, but worth knowing if you're running right at the limit. ## Configuring the trip and auxiliary package A shunt trip release (STL) is integrated for remote opening; the integrated auxiliary trip order code is 3VA9688-0BL32. The front face carries a voltage-trigger indicator and a mechanical trip indicator — so when you walk the panel after a fault, you see a red flag without needing a meter. The 101.6 mm width is a standard 4-pole MCCB footprint — it occupies four 25.4 mm (1-inch) module positions on a DIN rail or mounting plate.","metaTitle":"Siemens 3VA1050-4ED42-0JH0 SENTRON MCCB, 50 A, 4-Pole, Line","metaDescription":"Siemens SENTRON 3VA1050-4ED42-0JH0 molded case circuit breaker, 50 A rated, 4-pole, line protection. Breaking capacity 121 kA at 240 V. Active production. Quoted to order.","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":"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":"Yes","Number of poles":"4","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 + 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":"Shunt trip (STL)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9688-0BL32","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":"S","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=139581&mlfb=3VA1050-4ED42-0JH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1050-4ED42-0JH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1050-4ED42-0JH0 and get current pricing?","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 price and lead time."},{"question":"Will 3VA1050-4ED42-0JH0 drop into a panel specified around 3VA1010-2ED42-0AE0 without rewiring?","answer":"Both are 4-pole SENTRON 3VA MCCBs with the same 101.6 mm width and 70 mm depth, so the physical footprint and busbar connection pattern are identical. The wiring will fit, but the trip rating differs — 50 A on this part versus a lower rating on the 3VA1010 variant. Verify the load current and coordination study before swapping."},{"question":"What compliance documentation does Siemens provide for 3VA1050-4ED42-0JH0?","answer":"Siemens SENTRON 3VA MCCBs carry CE marking for the European low-voltage directive and are designed to meet IEC 60947-2. RoHS and REACH declarations are available from Siemens' documentation portal. UL listing is standard on the 3VA platform for North American installations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1050-4ED42-0JH0","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/3VA1050-4ED42-0JH0 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}}