{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF36-0CH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF36-0CH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0CH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0CH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1, molded case circuit breaker, 3VA1120-3EF36-0CH0, 20 A, 3-pole, 75.6 kA interrupting at 240 V, line protection, TM240 release, undervoltage release.","salesMarkdown":"## Siemens 3VA1120-3EF36-0CH0 — SENTRON 3-pole MCCB, 20 A, line protection Its interrupting capacity scales with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — so at 415 V it clears a 52.5 kA fault without upstream coordination failure, which is the figure that governs most industrial panel SCCR compliance. No communication function, no phase failure detection, no ground fault monitoring — this is a pure line-protection device, not a power monitor. ## Thermal derating and mechanical endurance Rated continuous current holds at 20 A from 40 °C through 50 °C ambient; above that it derates linearly to 18 A at 70 °C. The breaker is rated for 15 000 mechanical operations — that is the latching endurance figure, so it is sized for moderate switching duty in a distribution panel, not for continuous motor starting. The 76.2 mm width is a standard 3-pole MCCB footprint — it fits the same DIN-rail or panel-mount cutout as other SENTRON 3VA1 3-pole units. The 70 mm depth leaves clearance for rear-access busbars in a typical 200 mm deep enclosure.","metaTitle":"Siemens 3VA1120-3EF36-0CH0 SENTRON MCCB, 20 A, 3-Pole, 75.6","metaDescription":"Siemens 3VA1120-3EF36-0CH0 SENTRON molded case circuit breaker, 20 A rated continuous current, 3-pole, 75.6 kA interrupting at 240 V. Currently in 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":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 690 V":"10.5 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":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"Yes","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":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB24","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":"N","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=184169&mlfb=3VA1120-3EF36-0CH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0CH0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of 3VA1120-3EF36-0CH0 at 415 V?","answer":"At 415 V the interrupting capacity is 52.5 kA. At 240 V it is 75.6 kA, at 440 V it is 32 kA, and at 690 V it is 10.5 kA."},{"question":"Where can I buy 3VA1120-3EF36-0CH0 and how is it quoted?","answer":"The 3VA1120-3EF36-0CH0 is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock or price figures are published here."},{"question":"Will 3VA1120-3EF36-0CH0 drop into a panel specified around 3VA1020-3ED36-0AA0?","answer":"Both are 3-pole SENTRON 3VA1 MCCBs with the same 76.2 mm width and 130 mm height, so the mechanical cutout and busbar spacing are identical. The 3VA1120-3EF36-0CH0 carries a TM240 release and an undervoltage release, while the 3VA1020-3ED36-0AA0 may differ in release type or auxiliary configuration — verify the release and accessory fit before swapping, but the footprint is a direct drop-in."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0CH0","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/3VA1120-3EF36-0CH0 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}}