{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VM1120-4EE42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VM1120-4EE42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VM1120-4EE42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VM1120-4EE42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VM1120-4EE42-0AA0, 4-pole molded case circuit breaker, 20 A rated continuous current, TM220 thermal-magnetic release, 121 kA breaking capacity at 240 V.","salesMarkdown":"It's a line-protection device, not a motor-protective breaker — no ground-fault monitoring, no N-conductor protection, no communication module, and no motor-drive option on the accessory slot. That means it lives in a distribution panel or sub-feed, not on a motor starter bucket. Breaking capacity is the headline: 121 kA at 240 V AC, 76 kA at 415 V, 53 kA at 440 V, and 11.9 kA at 500 V. The 500 V figure drops to 11.9 kA, so if you're on a 480 V corner-grounded delta or a 500 V DC system (max rated operational voltage Ue with DC is 500 V), verify the SCCR of the downstream panel matches. The TM220 release is fixed at 20 A (Ir max. adjustable to 20 A). Rated insulation voltage Ui is 690 V. ## Panel fit — DIN rail or direct mount Front face IP40 rated. Power loss is 12 W maximum at full load. ## Temperature derating — flat to 55 °C, then a 1 A step At 60 °C it derates to 19 A, and stays at 19 A through 70 °C. That's a clean, predictable curve — no surprise drop at 50 °C.","metaTitle":"Siemens 3VM1120-4EE42-0AA0 SENTRON MCCB, 20 A, 4-Pole, 121 k","metaDescription":"Siemens SENTRON 3VM1120-4EE42-0AA0 molded case circuit breaker. 20 A rated current, 4-pole, TM220 release. Breaking capacity 121 kA at 240 V. Current lifecycle stage. Sourced to or","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","title":"3VM1120-4EE42-0AA0","Height":"130 mm","at 240 V":"121 kA","at 415 V":"76 kA","at 440 V":"53 kA","at 500 V":"11.9 kA","at 40 °C":"20 A","at 45 °C":"20 A","at 50 °C":"20 A","at 55 °C":"20 A","at 60 °C":"19 A","at 65 °C":"19 A","at 70 °C":"19 A","Depth [in]":"2.8 in","Width [in]":"4 in","Height [in]":"5.1 in","description":"circuit breaker 3VM1 IEC frame 160 breaking capacity class S Icu=36kA @ 415V 4-pole, line protection TM220, ATFM, In=20A overload protection Ir=14A...20A short-circuit protection Ii=16 x In N conductor unprotected nut keeper kit","Number of poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"12 000","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"12 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"20 A","Rated insulation voltage Ui":"690 V","Ground fault monitoring version":"Without","Design of the overcurrent release":"TM220","Protection class IP / on the front":"IP40","Design of the N-conductor protection":"Without","Reference code / acc. to DIN EN 81346-2":"Q","Max. rated operational voltage Ue with DC":"500 V","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.":"14 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LI","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":"500 V","Type of electrical connection / for main current circuit":"lug terminal","Arrangement of electrical connectors / for main current circuit":"Front connection","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/890a9c4e8f724baae13c5de28442f149.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=575448&mlfb=3VM1120-4EE42-0AA0"},"ai":{"faq":[{"question":"What is 3VM1120-4EE42-0AA0's listed depth (70 mm) on this component line?","answer":"Depth is 70 mm (2.8 in). That's the body depth excluding the handle throw and any external accessories."},{"question":"What is 3VM1120-4EE42-0AA0's listed width (101.6 mm) on this component line?","answer":"Width is 101.6 mm (4 in). That's the standard 4-pole MCCB footprint for this class."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VM1120-4EE42-0AA0","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/3VM1120-4EE42-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}