{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VM1120-4ED32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VM1120-4ED32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VM1120-4ED32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VM1120-4ED32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON series, Molded case circuit breaker, 3VM1120-4ED32-0AA0, 3-pole, 20 A, TM210 thermal-magnetic release, breaking capacity 121 kA at 240 V AC.","salesMarkdown":"## What you're looking at The TM210 gives you an adjustable short-circuit pickup (li) up to 320 A, so you can dial in the magnetic trip for motor inrush or feeder coordination without swapping the breaker. Breaking capacity is the headline here: 121 kA at 240 V AC, 76 kA at 415 V, 53 kA at 440 V, and still 12 kA at 500 V. That's serious fault-clearing muscle for a 20 A frame — it'll ride through a bolted fault on a 2 MVA transformer secondary without welding its contacts shut. ## Thermal derating — real-world current At 60 °C it derates to 19 A, same at 65 °C and 70 °C. That's a flat curve — you don't lose a full amp until you're past 55 °C ambient inside the panel. Power loss maxes at 12 W — negligible for thermal budget in a typical panel, but worth noting if you're stuffing a dozen of these into a sealed enclosure with no forced ventilation. Footprint: 76.2 mm wide (3 inches), 130 mm tall (5.1 inches), 70 mm deep (2.8 inches). No motor drive option on this variant, so it's manual operation only (toggle handle). If you need those extras, you're looking at the 3VA series instead. That said, the 3VM series is Siemens' economy MCCB line, positioned below the 3VA series. If you're sourcing against a BOM that originally called out a 3VA1010-2ED32-0AD0, the 3VM1120-4ED32-0AA0 is a different frame — same 20 A, 3-pole, but the 3VA has a higher interrupting rating at 480 V and more accessory options. Physically, the 3VM is slightly narrower (76.2 mm vs 90 mm on the 3VA), so it won't drop into the same panel cutout without a filler plate or re-drill. Check your panel layout before swapping.","metaTitle":"Siemens 3VM1120-4ED32-0AA0 SENTRON MCCB, 20A, 3-Pole, 121kA","metaDescription":"Siemens SENTRON 3VM1120-4ED32-0AA0 molded case circuit breaker. 20A rated, 3-pole, TM210 release. Breaking capacity 121kA at 240V AC. Active production, sourced to order. Request R","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"76.2 mm","title":"3VM1120-4ED32-0AA0","Height":"130 mm","at 240 V":"121 kA","at 415 V":"76 kA","at 440 V":"53 kA","at 500 V":"12 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]":"3 in","Height [In]":"5.1 in","description":"circuit breaker 3VM1 IEC frame 160 breaking capacity class S Icu=36kA @ 415V 3-pole, line protection TM210, FTFM, In=20A overload protection Ir=20A, not adjustable short-circuit protection Ii=16 x In nut keeper kit","Number Of Poles":"3","Product version":"Line protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","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 insulation voltage Ui":"690 V","Ground-Fault Monitoring Version":"Without","Design Of The Overcurrent Release":"TM210","Design Of Short-Circuit Protection":"For switching capacity values in DC power systems, see the 3VA Molded Case Circuit Breaker Manual; link available under Service & Support in the last chapter","protection class IP / on the front":"IP40","reference code / acc. to IEC 81346-2":"Q","Max. rated operational voltage Ue with DC":"500 V","Product Extension / Optional / Motor Drive":"No","Adjustable response value current / li max.":"320 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Max. rated operational voltage Ue with AC 50/60Hz":"500 V","Mechanical Service Life (Switching Cycles) / Typical":"15 000","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front connection"}},"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=575445&mlfb=3VM1120-4ED32-0AA0"},"ai":{"faq":[{"question":"Where can I buy 3VM1120-4ED32-0AA0 and how do I get a price?","answer":"Available to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time, no stock count or lead-time number published here."},{"question":"What is 3VM1120-4ED32-0AA0's listed depth (70 mm) on this component line?","answer":"Depth is 70 mm (2.8 inches). Width is 76.2 mm (3 inches), height is 130 mm (5.1 inches). Standard 3-pole MCCB footprint."},{"question":"Will 3VM1120-4ED32-0AA0 drop into a panel specified around 3VA1010-2ED32-0AD0 without rewiring?","answer":"No — the 3VM is narrower (76.2 mm vs ~90 mm on the 3VA). Same 20 A, 3-pole, TM210 release, but the physical cutout differs. You'll need a filler plate or re-drill. Check your panel layout before ordering."},{"question":"What are the key ratings for 3VM1120-4ED32-0AA0?","answer":"20 A continuous at 40-55 °C, 3-pole, TM210 thermal-magnetic release with adjustable magnetic pickup up to 320 A. Breaking capacity: 121 kA at 240 V, 76 kA at 415 V, 53 kA at 440 V, 12 kA at 500 V. Rated insulation voltage 690 V. Front IP40."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VM1120-4ED32-0AA0","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/3VM1120-4ED32-0AA0 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}}