{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"WB1KB125","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"WB1KB125","canonicalUrl":"https://aoctrl.com/schneider/WB1KB125","factsUrl":"https://aoctrl.com/api/mcp/products/WB1KB125","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys contactor coil, WB1KB125, for CR1B contactors, 257-280 V AC / 222-243 V DC control voltage, low consumption.","salesMarkdown":"The Schneider Electric WB1KB125 is a replacement contactor coil from the TeSys range, designed specifically for CR1B contactors (models.31.32.33). This is the part you need when the coil on a CR1B fails and you want to keep the existing contactor base rather than swapping the whole assembly. The coil accepts a wide control voltage range — 257...280 V AC at 50-400 Hz, or 222...243 V DC — making it suitable for panels with mixed AC/DC control supplies. It's a low-consumption design, drawing only 0.15...0.2 W hold-in power on a single-pole configuration, which keeps the control transformer lightly loaded. ## Electrical Fit — What the Ratings Mean The control voltage range is the critical fit parameter. The WB1KB125 pulls in on 257-280 V AC or 222-243 V DC, so verify your panel's control supply matches one of those bands. The inrush power hits 380...520 W on a single-pole configuration, dropping to the low hold-in figures once the contactor seals — the control transformer must handle that momentary surge. Heat dissipation varies by pole count: 7...10 W for 1P, up to 35...45 W for 4P at 50-400 Hz. If the coil lives in a densely packed enclosure, that heat adds up — account for it in your thermal budget. Not a high-cycle solenoid, but adequate for standard motor starting or resistive load switching.","metaTitle":"Schneider Electric WB1KB125 TeSys Contactor Coil, Obsolete","metaDescription":"Schneider Electric WB1KB125 TeSys contactor coil for CR1B contactors. Obsolete status — sourced to order against RFQ. 257-280 V AC / 222-243 V DC control voltage.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Reversing Contactors"],"specifications":{"Range":"TeSys","Category":"18402-WORLD SERVICE PARTS(CONTROL ACCESS)","Coil type":"Low consumption","lifecycle_stage":"current","Heat dissipation":"15...20 W 50...400 Hz 2P 24...30 W 50...400 Hz 3P 35...45 W 50...400 Hz 4P 7...10 W 50...400 Hz 1P","Inrush power in W":"1100...1400 W 4P 380...520 W 1P 600...800 W 2P 900...1100 W 3P","Average resistance":"128 Ohm 68 °F (20 °C)","Inrush power in VA":"1100...1300 VA 3P 1300...1600 VA 4P 450...620 VA 1P 720...1000 VA 2P","Control circuit type":"AC DC","Mechanical durability":"1200000 cycles","Nbr. of units in pkg.":"1","Product or Component Type":"Contactor coil","[Uc] control circuit voltage":"257...280 V AC 50...400 Hz 319...359 V AC 50...400 Hz 373...408 V AC 50...400 Hz 380...400 V AC 50...400 Hz 419...462 V AC 50...400 Hz 440 V AC 50...400 Hz 222...243 V DC 250 V DC 280...310 V DC 328...360 V DC 369...408 V DC","Hold-in power consumption in W":"0.15...0.2 W 1P 0.35...0.5 W 2P 0.7...1 W 3P 1.2...1.6 W 4P","Hold-in power consumption in VA":"0.15...0.2 VA 50...400 Hz 1P 0.35...0.5 VA 50...400 Hz 2P 0.7...1 VA 50...400 Hz 3P 1.2...1.6 VA 50...400 Hz 4P"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/53db4506fc7679d074ece527e6cfce51.pdf","sourceUrl":"https://www.se.com/be/en/product/WB1KB125/coil-wb1k-for-cr1b-31-32-33/","alternativesUrl":"https://aoctrl.com/api/mcp/products/WB1KB125/alternatives.json"},"ai":{"faq":[{"question":"What contactor does this coil fit?","answer":"This coil is designed for the Schneider Electric CR1B contactor series, specifically models.31.32, and.33. It is a direct replacement coil for those contactor bases."},{"question":"What control voltage does the WB1KB125 coil accept?","answer":"The coil accepts 257...280 V AC at 50-400 Hz and 222...243 V DC. It also covers several other voltage bands within the AC and DC ranges listed in the specifications, including 319-359 V AC, 373-408 V AC, 380-400 V AC, 419-462 V AC, 440 V AC, 250 V DC, 280-310 V DC, 328-360 V DC, and 369-408 V DC."},{"question":"How do I source the WB1KB125 since it's obsolete?","answer":"Since the WB1KB125 is obsolete, it is sourced through the surplus and new-old-stock market. Submit an RFQ with your quantity and target price; we can check available inventory across our network and quote accordingly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/WB1KB125","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/WB1KB125 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}}