{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1050-3ED42-0HA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1050-3ED42-0HA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1050-3ED42-0HA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1050-3ED42-0HA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1050-3ED42-0HA0, molded case circuit breaker, 4-pole, 50 A (40 °C), TM210 overcurrent release, shunt trip, 75.6 kA at 240 V, line protection.","salesMarkdown":"## What it is and what it does The Siemens 3VA1050-3ED42-0HA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — it sits upstream in a distribution panel, guarding a feeder or a branch circuit against overloads and short circuits. Four poles, so it switches all three phases plus neutral in a 3-phase 4-wire system. The TM210 release is a thermal-magnetic type: the thermal element handles overloads (time-delayed), the magnetic element handles short-circuit faults (instantaneous). No communication function, no ground-fault monitoring — this is a straightforward, non-communicating breaker for standard power distribution. ## Current rating and interrupting capacity — what they mean for fit Rated 50 A continuous at 40 °C ambient, and it holds that rating all the way up to 50 °C — no derating needed in a warm panel. Above 50 °C it starts to step down: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, 45 A at 70 °C. That thermal curve is the one to check if your enclosure runs hot. Interrupting capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. At 415 V — common for industrial distribution — the 52.5 kA rating means it can safely clear a fault current up to that level without rupturing. The 800 V rated insulation voltage confirms it's built for 690 V systems. ## Auxiliary release and trip indication This breaker includes a shunt trip (STL) auxiliary release — a voltage-triggered coil that lets you remotely trip the breaker by applying a control voltage. No undervoltage release, no trip indicator flag on the front. The shunt trip is useful for emergency-stop circuits or remote shutdown; wire it to a pushbutton or a safety relay. The basic switch inside is the 3VA10503ED420AA0 subassembly. ## Physical footprint and panel fit Dimensions: 130 mm high, 101.6 mm wide, 70 mm deep. That's a 4-inch wide body — standard for a 4-pole MCCB in the SENTRON 3VA1 frame. Mounts on a DIN rail or directly to a backplate via the breaker's own mounting feet. The 14.6 W maximum power loss at rated load is what the enclosure ventilation needs to handle; if you're packing several breakers side by side, add up the heat.","metaTitle":"Siemens 3VA1050-3ED42-0HA0 SENTRON MCCB, 50 A, 4-Pole, 75.6","metaDescription":"Siemens 3VA1050-3ED42-0HA0 SENTRON molded case circuit breaker, 50 A rated at 40 °C, 4-pole, 75.6 kA interrupting at 240 V. TM210 release, shunt trip. 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":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 500 V":"7.5 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":"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":"3VA10503ED420AA0","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":"0","Switching Capacity Class Of The Circuit Breaker":"N","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=85781&mlfb=3VA1050-3ED42-0HA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1050-3ED42-0HA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3VA1050-3ED42-0HA0?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the interrupting capacity of the 3VA1050-3ED42-0HA0 at 415 V?","answer":"At 415 V the interrupting capacity is 52.5 kA."},{"question":"Does the 3VA1050-3ED42-0HA0 have a shunt trip?","answer":"Yes, it includes a shunt trip (STL) auxiliary release for remote tripping."},{"question":"Will the 3VA1050-3ED42-0HA0 fit in a panel designed for the 3VA1110-5ED32-0AA0?","answer":"Yes, the 3VA1110-5ED32-0AA0 is a higher-rated sibling in the same SENTRON 3VA family with the same footprint and mounting, so it drops in without rewiring — provided the load current is within the 50 A rating of this breaker."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1050-3ED42-0HA0","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/3VA1050-3ED42-0HA0 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}}