{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3GE42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3GE42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3GE42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3GE42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3GE42-0AA0, molded case circuit breaker, 20 A, 4-pole, TM220 thermal-magnetic release, line protection, interrupting capacity 75.6 kA at 240 V.","salesMarkdown":"## SENTRON 3VA1120-3GE42-0AA0 — 20 A MCCB, 4-Pole, TM220 The Siemens 3VA1120-3GE42-0AA0 is a SENTRON-series molded case circuit breaker (MCCB) rated for 20 A continuous current across the full 40–55 °C ambient range, with only a 1 A derating step at 60–70 °C. Its 4-pole configuration and TM220 thermal-magnetic release make it a direct fit for line-protection duty in distribution panels. ## Interrupting Capacity & Voltage Ratings This MCCB delivers 75.6 kA interrupting capacity at 240 VAC, 52.5 kA at 415 VAC, 32 kA at 440 VAC, and 11.9 kA at 500 V and 690 VAC. Those numbers tell the panel designer where the part can clear a fault without upstream coordination — at 240 V it handles high available fault current typical of service-entrance positions; at 415 V and above it fits downstream distribution where fault levels are lower. ## Panel Fit & Integration Dimensions are 70 mm depth, 101.6 mm width, 130 mm height; the 4-pole width (101.6 mm) matches standard MCCB panel cutouts for this class. Maximum power loss is 12 W, worth factoring into enclosure thermal calculations.","metaTitle":"Siemens 3VA1120-3GE42-0AA0 SENTRON MCCB, 20 A, 4-Pole, 75.6","metaDescription":"Siemens SENTRON 3VA1120-3GE42-0AA0 molded case circuit breaker, 20 A rated, 4-pole, TM220 release. Interrupting capacity 75.6 kA at 240 VAC. Active production. Quoted to order.","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":"20 A","Minimum":"20 A","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 500 V":"11.9 kA","at 690 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]":"2.76 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":"TM220","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":"100%","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":"N","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/fc2a8c7f585b9ad285f8f8bcc0b3524f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=217375&mlfb=3VA1120-3GE42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3GE42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of this MCCB at different voltages?","answer":"75.6 kA at 240 VAC, 52.5 kA at 415 VAC, 32 kA at 440 VAC, and 11.9 kA at both 500 V and 690 VAC."},{"question":"Where can I buy the 3VA1120-3GE42-0AA0 and get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial response."},{"question":"Does the 3VA1120-3GE42-0AA0 drop into a panel specified for the 3VA1020-2ED32-0DD0?","answer":"The 3VA1120-3GE42-0AA0 is a 4-pole MCCB with a 101.6 mm width, while the 3VA1020-2ED32-0DD0 is a different variant; verify panel cutout dimensions and wiring diagram before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3GE42-0AA0","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/3VA1120-3GE42-0AA0 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}}