{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1110-1AA42-0BC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1110-1AA42-0BC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1110-1AA42-0BC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1110-1AA42-0BC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1110-1AA42-0BC0, switch disconnector in MCCB design, 4-pole, 100 A, 690 V AC, with undervoltage release 24 V DC and 2 HQ auxiliary switches.","salesMarkdown":"It is built for load-break isolation, not overload or short-circuit protection — that distinction matters when you are filling a BOM line that calls for a disconnect switch, not a breaker. The part carries a 24 V DC undervoltage release and two HQ auxiliary switches, so it can be wired into a safety or control circuit that must drop the load on undervoltage or signal position back to a PLC. ## Thermal profile — flat to 70 °C No derating curve to calculate; the full 100 A is available even at the 70 °C upper ambient limit. That is unusual for an MCCB-frame device and simplifies panel thermal budgeting — you do not need to oversize the disconnect for a hot enclosure. ## Integration — what fits where The disconnect mounts via front terminals with busbar connection for the main circuit. Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — a 4-pole MCCB footprint that fits standard panel layouts for the 160 A frame size. The 38 W maximum power loss needs to be factored into the enclosure thermal calculation. ## Auxiliary and control wiring Two CO (changeover) contacts are built in as HQ auxiliary switches, giving you position feedback without an add-on module. The undervoltage release (UVR) is wired separately at 24 V DC; when the control voltage drops, the UVR trips the disconnect open — a standard safety function for motor feeder isolation. Note that the UVR does not include a leading contact, so the dropout is not delayed relative to the main poles.","metaTitle":"Siemens 3VA1110-1AA42-0BC0 SENTRON Switch Disconnector, 100","metaDescription":"Siemens SENTRON 3VA1110-1AA42-0BC0 switch disconnector in MCCB design. 100 A, 4-pole, 690 V AC. Includes undervoltage release 24 V DC and 2 HQ auxiliary switches. Active lifecycle,","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","Height":"130 mm","at 40 °C":"100 A","at 45 °C":"100 A","at 50 °C":"100 A","at 55 °C":"100 A","at 60 °C":"100 A","at 65 °C":"100 A","at 70 °C":"100 A","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Switch disconnector","Undervoltage Release":"Yes","Design Of The Product":"in MCCB design","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"38 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","Design Of The Auxiliary Release":"Undervoltage release (UVR)","Insulation Voltage / Rated Value":"800 V","protection class IP / on the front":"IP40","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","Product Function / Communication Function":"No","Undervoltage Release With Leading Contact":"No","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","number of CO contacts / for auxiliary contacts":"2","Mechanical Service Life (Operating Cycles) / Typical":"15 000","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=52956&mlfb=3VA1110-1AA42-0BC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1110-1AA42-0BC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1110-1AA42-0BC0?","answer":"This part is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings for 3VA1110-1AA42-0BC0?","answer":"It is a 4-pole switch disconnector rated for 100 A continuous at 690 V AC or 600 V DC, with a rated insulation voltage of 800 V. The rating is flat across the full 40 °C to 70 °C ambient range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1110-1AA42-0BC0","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/3VA1110-1AA42-0BC0 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}}