{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5GD42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5GD42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5GD42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5GD42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-5GD42-0AA0, 4-pole molded case circuit breaker, 20 A rated current, TM210 thermal-magnetic release, interrupting capacity 187 kA at 240 V AC.","salesMarkdown":"The TM210 thermal-magnetic release gives it a continuous current rating of 20 A that holds flat from 40 °C through 55 °C, then derates to 19 A at 60–70 °C — useful to know if the breaker sits in a warm enclosure or next to other heat sources. Interrupting capacity is the headline here: 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. Physical footprint: 130 mm height, 101.6 mm width (4 inches), 70 mm depth. The 4-inch width is standard for a 4-pole MCCB in this class — it occupies the same DIN-rail or mounting-plate slot as other SENTRON 3VA four-pole units. The optional motor drive (listed as available) allows remote tripping or reclose in automated panels. Power loss is 12 W maximum at rated load. In a densely packed panel, that's modest but not trivial — factor it into your thermal budget if the enclosure is sealed or tightly louvered.","metaTitle":"Siemens 3VA1120-5GD42-0AA0 SENTRON MCCB, 4P, 20A, 187kA at 2","metaDescription":"Siemens 3VA1120-5GD42-0AA0 SENTRON 4-pole MCCB, 20 A rated, TM210 release, 187 kA at 240 V AC. Current 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","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","Number Of Poles":"4","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":"800 V","Courant permanent assigné Iu":"20 A","Ground-Fault Monitoring Version":"Without","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":"100%","reference code / acc. to IEC 81346-2":"Q","Max. rated operational voltage Ue with DC":"600 V","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"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":"M","Max. rated operational current of the frame size":"160 A","Mechanical Service Life (Switching Cycles) / Typical":"20 000","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"17 x 6.5 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/53a65cee93f4b2847e2a1be10ad29911.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=304447&mlfb=3VA1120-5GD42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5GD42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3VA1120-5GD42-0AA0 and get a price?","answer":"This MCCB is sourced through independent distribution channels and quoted to order against an RFQ. Submit a request for quote (RFQ) to receive current availability and pricing — no stock-on-shelf figure is published here."},{"question":"What is the interrupting capacity of the 3VA1120-5GD42-0AA0?","answer":"187 kA at 240 V AC, 121 kA at 415 V AC, 75.6 kA at 440 V AC, and 17 kA at both 500 V and 690 V AC. These figures apply to the full 4-pole configuration."},{"question":"Will the 3VA1120-5GD42-0AA0 drop into a panel designed for the 3VA1020-3ED36-0AA0 without rewiring?","answer":"Both are 4-pole SENTRON 3VA MCCBs with the same 20 A continuous rating, so the footprint and pole configuration match. The 3VA1120-5GD42-0AA0 carries a TM210 thermal-magnetic release versus the 3VA1020-3ED36-0AA0's electronic release — verify the trip-curve coordination and any auxiliary wiring differences before swapping, but the mechanical fit and bus connections are shared across the 3VA platform."},{"question":"What compliance documentation does Siemens provide for the 3VA1120-5GD42-0AA0?","answer":"Standard Siemens documentation includes CE declaration, UL listing, and IEC 60947-2 compliance. RoHS and REACH declarations are available on request through the manufacturer's support portal or your distributor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5GD42-0AA0","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/3VA1120-5GD42-0AA0 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}}