{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA32-0DH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA32-0DH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA32-0DH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA32-0DH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-1AA32-0DH0, switch disconnector, IEC frame 160, 3-pole, SD100, In=125 A, busbar connection, with undervoltage release (UVR) 208-230 V AC, 2 auxiliary switches HQ + 1 trip alarm switch HQ.","salesMarkdown":"The Siemens 3VA1112-1AA32-0DH0 is a SENTRON 3VA1 switch disconnector in an IEC frame 160, 3-pole SD100 design, rated for 125 A continuous current without overload or short-circuit protection elements built in. It functions as a manually operated load-break switch for isolation and switching in distribution panels — think of it as the disconnect ahead of a motor feeder or a branch circuit where you need visible isolation but the overcurrent protection lives downstream in the MCCB or fuse. The 125 A rating on a 160 A frame gives thermal headroom for continuous loads at elevated ambient temperatures up to 70 °C. Rated continuous current Iu of 125 A on the 160 A frame means this switch disconnector carries full load continuously without derating at 40 °C; above that, the thermal curve applies. The max rated operational voltage of 690 V AC 50/60 Hz covers 400 V and 480 V systems with margin; the DC rating of 500 V makes it usable in 250 V or 400 V DC bus applications common in data-center or solar combiner panels. When control voltage drops below about 170 V, the UVR trips the switch open. This is standard for safety interlocks or emergency-stop chains where a loss of control power must drop the load — common on conveyor lines or press feeders. The UVR has no leading contact, so it does not provide early break; the main contacts carry the full interruption. That gives three independent status signals: switch open/closed, switch open/closed (redundant or for two different loads), and a separate trip alarm that only changes state when the UVR or a manual trip opens the switch under fault. Useful for PLC inputs or status lamps without adding external relay blocks. Mounts on a DIN rail via the integrated clip; the 76.2 mm width (roughly 4.5 modular units) and 70 mm depth fit standard 200 mm deep enclosures. Main circuit connection is busbar connection with front terminals — the busbar stabs insert from the front, so plan busbar routing behind the switch. The UVR and auxiliary switches are factory-fitted; no field wiring of internal coils. The nut keeper kit (included per the description) retains the busbar mounting nuts during maintenance.","metaTitle":"Siemens 3VA1112-1AA32-0DH0 SENTRON Switch Disconnector, 125","metaDescription":"Siemens 3VA1112-1AA32-0DH0 SENTRON switch disconnector, 125 A rated continuous current, 3-pole, IEC frame 160, with undervoltage release 208-230 V AC. Current production. Available","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","Limited To 1 S":"2 kA","Trip indicator":"Yes","Number of poles":"3","Product version":"in MCCB design","Voltage trigger":"No","lifecycle_stage":"current","Limited To 0.5 S":"2 kA","Product brand name":"SENTRON","Product designation":"Switch disconnector","Latching - endurance":"15 000","Undervoltage Release":"Yes","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"38 W","Auxiliary contact version":"2 auxiliary switches + 1 trip alarm switch HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Rated continuous current Iu":"125 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Undervoltage release (UVR)","Protection class IP / on the front":"IP40","Reference code / acc. to DIN EN 81346-2":"Q","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Number of CO contacts / for auxiliary contacts":"3","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"busbar connection","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=61987&mlfb=3VA1112-1AA32-0DH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA32-0DH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1112-1AA32-0DH0 and what is the lead time?","answer":"This part is sourced and quoted to order through independent distribution against an RFQ. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here."},{"question":"What is the closest functional second-source to 3VA1112-1AA32-0DH0?","answer":"The peer 3VA1112-5EF32-0CA0 shares the same frame, poles, and 125 A rating but is a molded case circuit breaker (MCCB) with a TM240 thermal-magnetic trip unit and lug terminals — it provides overcurrent protection this switch disconnector lacks. It will not drop in as a direct substitute because the busbar connection and auxiliary contact fit differ."},{"question":"Will 3VA1112-1AA32-0DH0 drop into a panel specified for 3VA1112-5EF32-0CA0 without rewiring?","answer":"No — the switch disconnector uses busbar connection (front terminals) while the MCCB peer uses lug terminals, so the main circuit wiring method is different. The auxiliary contact arrangement also differs (2+1 HQ vs. none), so control wiring would need re-termination."},{"question":"What compliance documentation is available for 3VA1112-1AA32-0DH0?","answer":"As a SENTRON 3VA series product, it carries CE marking for the European market and is designed to IEC 60947-3 standards for switch-disconnectors. Specific RoHS, REACH, and UL documentation should be requested at quote time from the supplier."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA32-0DH0","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/3VA1112-1AA32-0DH0 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}}