{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5EF32-0CC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5EF32-0CC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5EF32-0CC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF32-0CC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-5EF32-0CC0, molded case circuit breaker, 3-pole, 20 A rated continuous current Iu, TM240 overcurrent release, breaking capacity 187 kA at 240 V.","salesMarkdown":"The Siemens SENTRON 3VA1120-5EF32-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 20 A at 40 °C through 50 °C. That flat thermal curve means no derating in a typical 50 °C panel interior — a real advantage when the enclosure runs warm. Above 55 °C it steps down: 19.2 A at 55 °C, 18.8 A at 60 °C, 18.4 A at 65 °C, and 18 A at 70 °C. The TM240 overcurrent release handles the thermal-magnetic trip curve for this frame size. Breaking capacity is the headline number here: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. Those are the interrupting ratings at the respective system voltages — critical for fault-current coordination studies. At 415 V, 121 kA covers most industrial secondary-distribution scenarios with high transformer kVA. ## Mounting and integration — DIN-rail footprint and panel fill That 76.2 mm width is 3 x 25.4 mm — a standard 3-pole MCCB module pitch, so it fits a 3-module DIN-rail cutout. The 15,000 mechanical endurance cycles (latching operations) are typical for this class — adequate for a distribution panel that sees infrequent switching; not a contactor duty cycle. ## Auxiliary and undervoltage release — what's built in","metaTitle":"Siemens 3VA1120-5EF32-0CC0 MCCB, 20 A, 3-Pole, 187 kA at 240","metaDescription":"Siemens SENTRON 3VA1120-5EF32-0CC0 molded case circuit breaker, 20 A rated, 3-pole, 187 kA breaking at 240 V. Current lifecycle. Sourced to order. Request quote.","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":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 690 V":"17 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":"No","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 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":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching capacity class of the circuit breaker":"M","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=122253&mlfb=3VA1120-5EF32-0CC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF32-0CC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1120-5EF32-0CC0 at 415 V?","answer":"121 kA at 415 V. Also rated 187 kA at 240 V, 75.6 kA at 440 V, and 17 kA at 690 V."},{"question":"Does 3VA1120-5EF32-0CC0 include an undervoltage release?","answer":"Yes, it has an integrated undervoltage release (UVR) as the auxiliary trip, plus 2 HQ auxiliary switches."},{"question":"How do I get pricing and availability for 3VA1120-5EF32-0CC0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5EF32-0CC0","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/3VA1120-5EF32-0CC0 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}}