{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1050-4ED42-0JC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1050-4ED42-0JC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1050-4ED42-0JC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1050-4ED42-0JC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1050-4ED42-0JC0, molded case circuit breaker, 4-pole, 50 A rated current, 121 kA breaking capacity at 240 VAC, line protection design, with shunt trip and 2 auxiliary switches.","salesMarkdown":"Breaking capacity reaches 121 kA at 240 VAC, 75.6 kA at 415 VAC, and holds at 11.9 kA at both 500 V and 690 VAC — that's the SCCR headroom for a 50 A frame in a distribution panel or motor control center. The 50 A rating is continuous at 40–50 °C; above that the thermal derating curve drops it to 45 A at 70 °C. Power loss is 14.6 W maximum, which matters for enclosure heat rise calculations. ## Integration Details No communication function or undervoltage release on this variant.","metaTitle":"Siemens 3VA1050-4ED42-0JC0 SENTRON MCCB, 4P, 50A, 121kA at 2","metaDescription":"Siemens SENTRON 3VA1050-4ED42-0JC0 molded case circuit breaker, 4-pole, 50A rated current, 121 kA breaking capacity at 240 VAC. Current production. Sourced 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","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":"3VA9688-0BL32","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=169494&mlfb=3VA1050-4ED42-0JC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1050-4ED42-0JC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at different voltages?","answer":"At 240 VAC it interrupts 121 kA, at 415 VAC 75.6 kA, at 440 VAC 52.5 kA, and at 500 V or 690 VAC it holds at 11.9 kA."},{"question":"Where can I buy 3VA1050-4ED42-0JC0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1050-4ED42-0JC0","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/3VA1050-4ED42-0JC0 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}}