{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1163-5MH32-0BC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1163-5MH32-0BC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1163-5MH32-0BC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1163-5MH32-0BC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160 MCCB, breaking capacity class M, Icu=55kA @ 415V, 3-pole, TM120M starter protection, In=63A, undervoltage release 24V DC, 2 auxiliary switches HQ, nut keeper kit.","salesMarkdown":"## What this 3VA1 MCCB carries The Siemens 3VA1163-5MH32-0BC0 is a 3VA1 IEC frame 160 molded-case circuit breaker in breaking capacity class M, rated Icu=55kA at 415 V AC. It is a 3-pole unit with a TM120M thermal-magnetic trip set to In=63 A, configured for starter protection — meaning it provides short-circuit protection only, with no overload protection element active (the motor starter handles overloads). The adjustable instantaneous trip range is Ii=5...15 x In. This order code includes an undervoltage release (UVR) coil rated 24 V DC, two HQ auxiliary switches, and a nut keeper kit. ## Breaking capacity and deployment The 55 kA Icu at 415 V puts this in the M (medium) breaking class — enough for most industrial secondary distribution and motor branch circuits, but not the high-fault class H (100 kA+). On a 400 V panel with a transformer rating under 2000 kVA, this holds selectivity with upstream fuses or a larger-frame breaker. The 3-pole form factor fits standard 3VA1 mounting accessories and busbar adapters. The TM120M trip unit is a thermal-magnetic design with a fixed thermal element (not adjustable) and a magnetic adjustable range of 5–15 x In. At 63 A, that means the magnetic pickup is adjustable from 315 A to 945 A — wide enough to coordinate with motor inrush on a 30–50 hp motor across-the-line start. The 'starter protection' designation (no overload protection) means this breaker sits upstream of a contactor and overload relay; the overload relay handles running overcurrent, and the MCCB handles the short-circuit fault only. The undervoltage release (UVR) at 24 V DC is a shunt-type trip that opens the breaker when voltage drops below roughly 60% of rated. It is not a time-delay UVR — it trips immediately on undervoltage, so it is suited for emergency-stop chains or safety-rated power removal where you want the breaker to drop on control-power loss. The two HQ auxiliary switches provide form-C (NO+NC) contacts rated for standard 24 V DC control logic.","metaTitle":"Siemens 3VA1163-5MH32-0BC0 Circuit Breaker, 63A, 55kA @ 415V","metaDescription":"Siemens 3VA1163-5MH32-0BC0 IEC frame 160 MCCB, 63A, Icu=55kA @ 415V, 3-pole, TM120M trip, UVR 24V DC, 2 aux switches. Current production. Sourced to order.","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=270286&mlfb=3VA1163-5MH32-0BC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1163-5MH32-0BC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB?","answer":"The breaking capacity is Icu=55 kA at 415 V AC, which is the M (medium) breaking class for the 3VA1 IEC frame 160."},{"question":"How do I get pricing and availability for 3VA1163-5MH32-0BC0?","answer":"This part is 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 offer."},{"question":"What does the 'starter protection' designation mean on this breaker?","answer":"Starter protection means the TM120M trip unit provides short-circuit protection only; the overload protection function is not active — the motor starter's overload relay handles running overcurrent."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1163-5MH32-0BC0","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/3VA1163-5MH32-0BC0 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}}