{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1150-4EF36-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1150-4EF36-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1150-4EF36-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1150-4EF36-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1150-4EF36-0BA0, a 3-pole molded case circuit breaker rated 50 A with 121 kA breaking capacity at 240 V AC, designed for line protection with an integrated undervoltage release.","salesMarkdown":"## What you're looking at It's a 3-pole unit rated for 50 A continuous at 40 °C ambient, and it holds that same 50 A rating all the way up to 50 °C before it starts to taper (49 A at 55 °C, 48 A at 60 °C, down to 45 A at 70 °C). That thermal stability matters out here in the grease: a hot panel next to a motor or a compressor won't force an early derate. The interrupting ratings tell the real story. This breaker clears 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and still holds 11.9 kA at 500 V and 690 V. That's a lot of fault-current muscle for a 50 A frame — it means you can put this in a high-available-fault panel without worrying about the breaker failing to clear before upstream gear takes damage. No ground-fault monitoring on this version, and no communication module. That's a standard 3-pole MCCB envelope — it'll drop into most SENTRON panelboards or DIN-rail adapter mounts without a fight. The 76.2 mm width (3 inches) is the same across the 3VA1 frame family, so if you're swapping out a different 3VA1 variant, the bus-bar spacing and lug positions will line up. Power loss at full rated current is 17.1 W maximum. That's moderate for a 50 A MCCB — plan for some heat rise inside the enclosure, but nothing that demands forced ventilation unless you're packing a dozen of these in a tight cabinet. ## What it's built for This is a line-protection breaker — Siemens designates it for protecting feeders and branch circuits, not motor-starting duty (no adjustable magnetic trip for inrush). The TM240 thermal-magnetic release gives you a fixed 240 A instantaneous trip, so it's sized for a 50 A continuous load with enough magnetic headroom to pass normal transformer inrush or capacitor bank charging current without nuisance tripping. The undervoltage release adds a layer of protection for applications where loss of control power should automatically disconnect the load — think conveyor systems, pump stations, or any process interlock where a dropout needs a hard trip, not just a contactor drop.","metaTitle":"Siemens 3VA1150-4EF36-0BA0 SENTRON MCCB, 50A, 121kA at 240V","metaDescription":"Siemens 3VA1150-4EF36-0BA0 SENTRON molded case circuit breaker, 50A rated, 121kA breaking capacity at 240V. 3-pole, line protection, undervoltage release. Sourced to order. Request","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"76.2 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]":"3 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"17.1 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA11504EF360AA0","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"TM240","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","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB11","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"500 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"box terminal on both sides","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=337973&mlfb=3VA1150-4EF36-0BA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1150-4EF36-0BA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for the 3VA1150-4EF36-0BA0?","answer":"It's a 3-pole MCCB rated 50 A continuous at 40 °C, with interrupting capacity of 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V and 690 V. The rated insulation voltage is 800 V."},{"question":"What does the TM240 overcurrent release mean?","answer":"TM240 is a thermal-magnetic trip unit with a fixed magnetic pickup of 240 A. The thermal element handles overload protection for the 50 A continuous rating, and the magnetic element provides short-circuit protection with a 240 A instantaneous threshold."},{"question":"What are the physical dimensions of this breaker?","answer":"The 3VA1150-4EF36-0BA0 measures 130 mm tall, 76.2 mm wide, and 70 mm deep."},{"question":"Where can I buy the 3VA1150-4EF36-0BA0 and how is it quoted?","answer":"We source this part through independent distribution channels. It is quoted to order against an RFQ — 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/3VA1150-4EF36-0BA0","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/3VA1150-4EF36-0BA0 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}}