{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3GD42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3GD42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3GD42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3GD42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, 4-pole, breaking capacity class N, 25kA @ 415V, 20A, TM210, FTFM, line protection, nut keeper kit for DC Power OEM in China.","salesMarkdown":"The Siemens 3VA1120-3GD42-0AA0-ZD00 is a 4-pole circuit breaker from the 3VA1 IEC frame 160 series, rated at 20 A with a breaking capacity class N of 25 kA at 415 V. It uses a TM210 thermal-magnetic trip unit with fixed overload protection (Ir = 20 A) and fixed short-circuit protection set at 16 x In. The FTFM (Fixed Thermal Fixed Magnetic) design means no field-adjustable trip settings — what you see on the nameplate is what you get, which simplifies coordination studies but locks in the protection curve. The fixed Ir = 20 A and Ii = 16 x In (320 A magnetic pickup) make it a drop-in replacement for a line needing a non-adjustable 20 A feeder breaker. The 4-pole configuration with 100% N protection is typical for 3-phase + neutral systems where the neutral is not oversized; if your design expects a reduced neutral (50% or 0%), this breaker will trip on neutral overloads that a reduced-neutral breaker would ignore. ## Integration Note Mounts on standard DIN rail in the enclosure. The nut keeper kit is a mechanical aid for panel builders terminating DC Power OEM assemblies — it retains the terminal nuts during wiring, saving time on repetitive builds. The 3VA1 frame is the compact IEC variant; verify that the panel cutout and busbar spacing match the 160 A frame footprint, not the larger 250 A frame.","metaTitle":"Siemens 3VA1120-3GD42-0AA0-ZD00 Circuit Breaker, 20A, 25kA @","metaDescription":"Siemens 3VA1120-3GD42-0AA0-ZD00 circuit breaker, IEC frame 160, 4-pole, 20A, 25kA breaking capacity @ 415V. Lifecycle stage: current. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/feb8ea332ac3f31759e152eb9ecac94c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667621&mlfb=3VA1120-3GD42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3GD42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this breaker?","answer":"The breaking capacity class N gives 25 kA Icu at 415 V. That is the maximum fault current it can safely interrupt at that voltage level."},{"question":"Where can I buy the 3VA1120-3GD42-0AA0-ZD00?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3GD42-0AA0-ZD00","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/3VA1120-3GD42-0AA0-ZD00 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}}