{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF36-0BH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF36-0BH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0BH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0BH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF36-0BH0, molded case circuit breaker, 3-pole, 20 A rated, 121 kA interrupting capacity at 240 V, line protection design, with undervoltage release.","salesMarkdown":"The Siemens SENTRON 3VA1120-4EF36-0BH0 is a 3-pole molded case circuit breaker rated for line protection, carrying a continuous current of 20 A across the full ambient range from 40 °C to 55 °C, derating to 19 A at 60 °C through 70 °C. The interrupting capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that govern fault-clearing capability in high-available-fault-current panels. ## Integrated release and auxiliary switching The UVR ensures the breaker trips if control voltage drops below its dropout threshold — a common requirement for safety disconnects in conveyor or pump circuits. ## Panel fit and physical integration The breaker occupies a 76.2 mm wide by 130 mm tall by 70 mm deep footprint — a standard 3-pole MCCB size that fits most DIN-rail or panel-mount enclosures without rework. Maximum power loss is 14.5 W. In a sealed, high-fill-factor panel, this heat must be considered for ambient derating — the breaker already self-derates above 55 °C, but adjacent devices may also need spacing or forced ventilation.","metaTitle":"Siemens 3VA1120-4EF36-0BH0 SENTRON MCCB, 20A, 3-Pole, 121kA@","metaDescription":"Siemens SENTRON 3VA1120-4EF36-0BH0 molded case circuit breaker, 20A rated, 3-pole, 121kA interrupting at 240V. Active production. Quoted to order. Undervoltage release included.","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":"20 A","at 45 °C":"20 A","at 50 °C":"20 A","at 55 °C":"20 A","at 60 °C":"19 A","at 65 °C":"19 A","at 70 °C":"19 A","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 in","Trip Indicator":"Yes","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":"14.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA11204EF360AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HQ","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":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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=71759&mlfb=3VA1120-4EF36-0BH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0BH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-4EF36-0BH0 and how is it quoted?","answer":"The breaker is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the interrupting capacity of 3VA1120-4EF36-0BH0?","answer":"121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V."},{"question":"Does 3VA1120-4EF36-0BH0 include an undervoltage release?","answer":"Yes, it ships with an undervoltage release (UVR) fitted, plus a 2 auxiliary + 1 trip alarm switch block."},{"question":"What are the physical dimensions of 3VA1120-4EF36-0BH0?","answer":"Width 76.2 mm, height 130 mm, depth 70 mm — a standard 3-pole MCCB footprint."},{"question":"Will 3VA1120-4EF36-0BH0 drop into a panel specified for 3VA1110-5ED36-0AC0?","answer":"Both are 3-pole SENTRON MCCBs with similar frame sizes; the 3VA1120-4EF36-0BH0 has a 20 A rating and higher interrupting capacity (121 kA vs the 3VA1110 series typical 25–65 kA range). Physical dimensions are the same 76.2 mm width, so it fits the same panel cutout and bus connections without rewiring, but verify the SCCR coordination study accepts the higher fault rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0BH0","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/3VA1120-4EF36-0BH0 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}}