{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5EF32-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5EF32-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5EF32-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF32-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-5EF32-0KA0, 3-pole molded case circuit breaker, 20 A rated at 40 °C, 187 kA breaking capacity at 240 VAC, shunt trip release.","salesMarkdown":"## SENTRON 3VA1120-5EF32-0KA0 — 20 A MCCB with Shunt Trip The Siemens 3VA1120-5EF32-0KA0 is a SENTRON 3-pole molded case circuit breaker rated 20 A continuous at 40 °C ambient, with a TM240 thermal-magnetic overcurrent release. ## Breaking Capacity by Voltage — Selectivity Planning Breaking capacity drops from 187 kA at 240 V to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500/690 V. Rated 20 A from 40 °C through 55 °C ambient; at 60 °C it derates to 19 A, holding through 70 °C. Maximum power loss is 12 W — negligible for panel heat budget but worth noting if the breaker is packed tight in a sealed enclosure.","metaTitle":"Siemens 3VA1120-5EF32-0KA0 SENTRON MCCB, 20 A, 187 kA at 240","metaDescription":"Siemens 3VA1120-5EF32-0KA0 SENTRON molded case circuit breaker, 3-pole, 20 A rated, 187 kA breaking capacity at 240 VAC. Active 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","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]":"3 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"Yes","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","Of The Supplied Basic Switch":"3VA11205EF320AA0","Design Of The Auxiliary Release":"shunt trip (STL)","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","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","Of The Integrated Auxiliary Trip Unit":"3VA9688-0BL33","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"500 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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=206584&mlfb=3VA1120-5EF32-0KA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF32-0KA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1120-5EF32-0KA0 at 240 V?","answer":"187 kA at 240 VAC, which is the highest interrupting rating for this breaker across its voltage range."},{"question":"Where can I buy 3VA1120-5EF32-0KA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."},{"question":"What is the rated current of 3VA1120-5EF32-0KA0 at 40 °C?","answer":"20 A continuous, holding through 55 °C before derating to 19 A at 60 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5EF32-0KA0","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/3VA1120-5EF32-0KA0 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}}