{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1050-4ED42-0HC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1050-4ED42-0HC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1050-4ED42-0HC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1050-4ED42-0HC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1050-4ED42-0HC0, molded case circuit breaker, 4-pole, 50 A rated current at 40 °C, breaking capacity 121 kA at 240 V AC, line protection design, with shunt trip (STL) and 2 auxiliary switches HQ.","salesMarkdown":"## MCCB for line protection with high interrupting capacity Its interrupting capacity hits 121 kA at 240 V AC, dropping to 75.6 kA at 415 V and 52.5 kA at 440 V — figures that matter when coordinating with upstream gear for selective coordination. Maximum power loss runs 14.6 W — a number to factor into enclosed panel thermal calculations if the breaker is fully loaded in a sealed box. The unit ships with a factory-fitted shunt trip (STL) and two auxiliary switches (HQ), so remote tripping and status feedback are wired in from the start. Above that it derates: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. That 101.6 mm width is a standard 4-inch footprint for a 4-pole MCCB — it fits the same cutout and bus-bar spacing as other SENTRON 3VA frames in this current class. The depth of 70 mm (2.76 in) leaves enough room behind the panel door for wiring and the shunt trip leads.","metaTitle":"Siemens 3VA1050-4ED42-0HC0 SENTRON MCCB, 4P, 50A, 121kA at 2","metaDescription":"Siemens SENTRON 3VA1050-4ED42-0HC0 molded case circuit breaker. 4-pole, 50A rated at 40°C, 121kA breaking at 240V. Active production. Sourced to order. Request quote.","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","Maximum":"0 A","Minimum":"0 A","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"11.9 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":"49 A","at 60 °C":"48 A","at 65 °C":"46 A","at 70 °C":"45 A","Depth [In]":"2.76 in","Width [In]":"4 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"Yes","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"14.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA10504ED420AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","Design Of The Auxiliary Release":"shunt trip (STL)","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","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","Of The Integrated Auxiliary Trip Unit":"3VA9688-0BL30","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching Capacity Class Of The Circuit Breaker":"S","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"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=432018&mlfb=3VA1050-4ED42-0HC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1050-4ED42-0HC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1050-4ED42-0HC0 and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Submit a quote request for current availability and pricing."},{"question":"What is the breaking capacity of this MCCB at different voltages?","answer":"The interrupting capacity is 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V AC."},{"question":"What is the rated current and how does it derate with temperature?","answer":"Rated current is 50 A from 40 °C to 50 °C ambient. It derates to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C."},{"question":"Will 3VA1050-4ED42-0HC0 drop into a panel specified for 3VA1110-5ED36-0AC0?","answer":"Both are 4-pole SENTRON 3VA MCCBs with similar frame dimensions, but the 3VA1110 carries a higher current rating. Check the specific cutout and bus-bar spacing for your panel — the 101.6 mm width is standard across the 3VA family, but verify the mounting depth and lug kit compatibility."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1050-4ED42-0HC0","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/3VA1050-4ED42-0HC0 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}}