{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1020-4ED32-0KH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1020-4ED32-0KH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1020-4ED32-0KH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1020-4ED32-0KH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1020-4ED32-0KH0, 3-pole molded case circuit breaker, 20 A rated continuous current Iu, 121 kA breaking capacity at 240 V, TM210 thermal-magnetic release, IP40 front protection.","salesMarkdown":"## Line protection MCCB with 121 kA interrupting capacity The Siemens SENTRON 3VA1020-4ED32-0KH0 is a 3-pole molded case circuit breaker rated for line protection, carrying 20 A continuous at 40 °C through 50 °C before thermal derating begins. At 55 °C it holds 19.2 A, at 70 °C it holds 18 A — the TM210 thermal-magnetic release tracks ambient temperature inside the panel, so if the enclosure runs hot, factor the derate curve into your BOM current margin. Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — that 121 kA figure at 240 V means it can safely clear a bolted fault on a high-capacity transformer secondary without the arc re-striking or the case rupturing. The 690 V rating drops to 11.9 kA, which still covers most industrial 690 V distribution panels with typical transformer impedances. The front carries IP40 protection. ## Mounting and auxiliary configuration Measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint. No undervoltage release, no ground fault monitoring, no communication module, and no phase failure detection on this variant. If you need remote trip indication or a UVR, this is not the build; you would step to a different suffix.","metaTitle":"Siemens 3VA1020-4ED32-0KH0 SENTRON MCCB, 3P, 20 A, 121 kA","metaDescription":"Siemens SENTRON 3VA1020-4ED32-0KH0 molded case circuit breaker, 3-pole, 20 A rated, 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":"3VA9688-0BL33","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","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":"No","Adjustable response value current / Ir max.":"20 A","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"320 A","Adjustable response value current / lr min.":"20 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":"100 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=321869&mlfb=3VA1020-4ED32-0KH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1020-4ED32-0KH0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1020-4ED32-0KH0","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/3VA1020-4ED32-0KH0 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}}