{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5ED42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5ED42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5ED42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5ED42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-5ED42-0AA0 molded case circuit breaker, 4-pole, 20 A, TM210 thermal-magnetic release, 187 kA at 240 V, IP40 front.","salesMarkdown":"It is designed to sit in a main distribution panel or sub-feed, protecting cables and downstream switchgear against overload and short-circuit faults. ## Interrupting capacity — the headline number At 415 V it still clears 121 kA, and at 440 V it holds 75.6 kA. Those are high-interrupting ratings for a 20 A frame — meaning it handles fault currents strong enough to weld a standard breaker shut. At 500 V and 690 V the rating drops to 17 kA, which still covers most industrial 480 V and 600 V class installations. ## Thermal rating and derating Rated 20 A continuous at 40 °C. The TM210 holds that full 20 A all the way up to 55 °C. At 60 °C it derates to 19 A, and stays at 19 A through 70 °C. That is a tight thermal curve — the breaker sheds only 1 A over a 30 °C rise. Means the panel builder can load it close to nameplate without chasing derate tables for every extra degree. Width is 101.6 mm (4 in), depth is 70 mm, height is 130 mm. Inside a typical IP54 or IP65 enclosure it is fine.","metaTitle":"Siemens 3VA1120-5ED42-0AA0 SENTRON MCCB, 4P, 20A, 187kA at 2","metaDescription":"Siemens 3VA1120-5ED42-0AA0 SENTRON molded case circuit breaker, 4-pole, 20 A rated, 187 kA interrupting at 240 V. Active production. Sourced to order against RFQ.","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","Height":"130 mm","Maximum":"0 A","Minimum":"0 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"17 kA","at 690 V":"17 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]":"2.76 in","Width [In]":"4 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","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","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","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","design of the N-conductor protection":"without","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cb92add5f9c2c9f015823d71468b9757.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=487939&mlfb=3VA1120-5ED42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5ED42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of this MCCB at 240 V?","answer":"The 3VA1120-5ED42-0AA0 delivers 187 kA at 240 V AC. At 415 V it is 121 kA, and at 440 V it is 75.6 kA."},{"question":"Where can I buy the 3VA1120-5ED42-0AA0?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Current availability and pricing are confirmed at quote time — submit an RFQ for a firm commitment."},{"question":"Will the 3VA1120-5ED42-0AA0 drop into a panel built for the 3VA1110-5ED32-0AA0?","answer":"Both are 4-pole SENTRON 3VA frame breakers with the same width (101.6 mm) and mounting footprint. The 3VA1120 carries a 20 A TM210 release and higher interrupting ratings (187 kA vs lower on the 1110). Electrically they are not identical — verify the fault-current rating your panel requires before swapping. Mechanically the DIN-rail footprint is the same."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5ED42-0AA0","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/3VA1120-5ED42-0AA0 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}}