{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF32-0JH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF32-0JH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0JH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0JH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF32-0JH0, 3-pole molded case circuit breaker, line protection, 20 A rated continuous current, TM240 thermal-magnetic release, 121 kA at 240 V interrupting capacity.","salesMarkdown":"## Interrupting capacity and thermal derating Its interrupting capacity hits 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — the SCCR headroom you need at the service entrance or in a high-fault panel feed. The rated continuous current Iu is 20 A, and it holds that rating flat from 40 °C through 50 °C; above 50 °C it derates linearly to 18 A at 70 °C. Dimensions are 76.2 mm wide, 130 mm high, 70 mm deep — a standard SENTRON 3VA footprint that drops into existing DIN-rail or screw-mount panel layouts without re-drilling. The front face carries an IP40 protection class, adequate for enclosed distribution boards. The integrated auxiliary trip order code is 3VA9688-0BL32. ## Environmental range Mechanical endurance is rated at 15 000 cycles.","metaTitle":"Siemens 3VA1120-4EF32-0JH0 SENTRON MCCB, 20 A, 121 kA at 240","metaDescription":"Siemens SENTRON 3VA1120-4EF32-0JH0 molded case circuit breaker, 3-pole, 20 A rated continuous current, 121 kA interrupting at 240 V. Active production, quoted 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":"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":"3VA9688-0BL32","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":"lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"17 x 6.5","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 0"}},"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=371901&mlfb=3VA1120-4EF32-0JH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0JH0/alternatives.json"},"ai":{"faq":[{"question":"What are the key interrupting ratings for 3VA1120-4EF32-0JH0?","answer":"121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. Rated continuous current is 20 A with thermal derating above 50 °C."},{"question":"Where can I buy 3VA1120-4EF32-0JH0 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"Will 3VA1120-4EF32-0JH0 drop into a panel specified for 3VA1110-5EE32-0JA0?","answer":"Both are 3-pole SENTRON 3VA MCCBs with the same 76.2 mm width and 130 mm height, so the panel cutout and mounting footprint are identical. The 3VA1120-4EF32-0JH0 carries a 20 A TM240 release versus the 3VA1110-5EE32-0JA0's different rating, so verify the trip curve and interrupting capacity match the coordination study before swapping."},{"question":"What compliance documentation is available for 3VA1120-4EF32-0JH0?","answer":"Standard SENTRON series documentation includes RoHS, REACH, and UL/IEC compliance declarations from Siemens. The part reference code per DIN EN 81346-2 is Q."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0JH0","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/3VA1120-4EF32-0JH0 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}}