{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF36-0HH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF36-0HH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0HH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0HH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF36-0HH0, molded case circuit breaker, 3-pole, line protection, 20 A rated current, breaking capacity 121 kA at 240 V AC, TM240 overcurrent release, shunt trip, auxiliary contacts 2+1 alarm.","salesMarkdown":"Its 20 A continuous rating holds across 40 °C to 50 °C without derating; above that it drops to 19.2 A at 55 °C and 18 A at 70 °C — a curve that matters when the breaker shares a warm enclosure with other heat sources. Breaking capacity is 121 kA at 240 V AC, 75.6 kA at 415 V, and 52.5 kA at 440 V, so it handles high-fault industrial mains without cascading upstream. The TM240 thermal-magnetic release provides fixed overload and short-circuit protection; a shunt trip (STL) is built in for remote tripping. Auxiliary contacts include two form-C switches plus a separate trip alarm contact (HQ configuration), giving the PLC or BMS a dedicated fault signal without sharing the aux stack. The breaker measures 76.2 mm wide, 130 mm high, and 70 mm deep — a standard 3-pole MCCB footprint that fits most Siemens SENTRON distribution boards and third-party enclosures with 25 mm busbar centers.","metaTitle":"Siemens SENTRON 3VA1120-4EF36-0HH0 MCCB, 20 A, 121 kA at 240","metaDescription":"Siemens SENTRON 3VA1120-4EF36-0HH0 molded case circuit breaker, 3-pole, 20 A rated current, breaking capacity 121 kA at 240 V. Active production. Sourced to order against RFQ.","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","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 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":"19.2 A","at 60 °C":"18.8 A","at 65 °C":"18.4 A","at 70 °C":"18 A","Trip indicator":"Yes","Number of poles":"3","Product version":"Line protection","Voltage trigger":"Yes","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches + 1 trip alarm switch HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"20 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Shunt trip (STL)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9688-0BL30","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","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"20 A","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"160 A","Adjustable response value current / lr min.":"14 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"3","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching capacity class of the circuit breaker":"S","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"box terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, round conductor terminal, stranded":"1 x (1.5 - 70 mm²)"}},"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=370048&mlfb=3VA1120-4EF36-0HH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0HH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-4EF36-0HH0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"When sourcing 3VA1120-4EF36-0HH0, what's the closest functional second-source — 3VA1010-4ED36-0CC0?","answer":"The 3VA1010-4ED36-0CC0 is a physically smaller frame (100 A max vs 250 A frame of the 3VA1120) and typically has lower breaking capacities. It will not drop into the same panel footprint without busbar and mounting adjustments. For a direct functional match, stay within the 3VA1120 frame family."},{"question":"What is 3VA1120-4EF36-0HH0's listed depth (70 mm) on this component line?","answer":"The depth is 70 mm, measured from the mounting surface to the front of the breaker body — standard for this 3-pole SENTRON 3VA frame."},{"question":"What is 3VA1120-4EF36-0HH0's listed width (76.2 mm) on this component line?","answer":"The width is 76.2 mm, which is the standard 3-pole width for the SENTRON 3VA1120 frame — three 25.4 mm pole centers."},{"question":"Will 3VA1120-4EF36-0HH0 drop into a panel that was specified around 3VA1010-4ED36-0CC0 without rewiring?","answer":"No — the 3VA1010-4ED36-0CC0 uses a smaller frame (100 A max) with different mounting hole centers and busbar spacing. The 3VA1120-4EF36-0HH0 is physically larger and requires its own footprint; rewiring and busbar changes are needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0HH0","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/3VA1120-4EF36-0HH0 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}}