{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TF42-24","brand":"ABB","brandSlug":"abb","productSlug":"TF42-24","canonicalUrl":"https://aoctrl.com/abb/TF42-24","factsUrl":"https://aoctrl.com/api/mcp/products/TF42-24","rawCanonicalId":null},"summary":{"shortDescription":"Eaton A-Line TF42-24, NEMA type, 3-pole thermal overload relay, 20-0 - 24.0 A adjustment range, Trip Class 10, for AF9-AF38 contactors.","salesMarkdown":"The Eaton TF42-24 is a 3-pole thermal bimetallic overload relay with a 20.0 to 24.0 Amp adjustment range, Trip Class 10, and selectable manual or automatic reset. It is designed for use with AF Series contactors in the AF9 through AF38 frame sizes — meaning it mounts directly to those contactor bodies without additional hardware, saving panel space and wiring time. That is the standard for standard-duty motor starting — fast enough to protect the motor winding during a stalled-rotor condition but slow enough to ride through normal inrush. For a 24 A motor load, set the dial to the motor nameplate FLA; the 20-24 A window covers NEMA frame sizes up to about 7.5 HP at 460 V. ## Integration with AF contactors The TF42-24 snaps directly onto AF9 through AF38 contactors — no separate mounting kit or bus bar required. The thermal bimetal element is in the power path between the contactor output and the motor leads, so the wiring sequence is line → contactor → overload relay → motor. The selectable manual/automatic reset is a DIP-style lever on the front face; set it to manual for applications where an automatic restart after a trip could be a safety hazard (conveyors, presses), and automatic for remote or unattended installations like HVAC or pump stations.","metaTitle":"Eaton TF42-24 Overload Relay, 24 A, 3-Pole, Trip Class 10","metaDescription":"Eaton TF42-24 thermal overload relay, 20-24 A adjustment, 3-pole, Trip Class 10. For AF9-AF38 contactors. Current lifecycle stage. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Amps":"24","Type":"NEMA","Poles":"3","title":"TF42-24","Amps Range":"20 - 24","description":"20.0 - 24.0 Amp, IEC, Overload Relay|20.0 - 24.0 Amp, IEC, Overload Relay, Type: Thermal Bi-Metallic, Trip Class 10. Selectable Manual or Automatic Reset. For use with AF Series, AF9 - AF38 Frame Contactors.","Family / Style":"A-Line","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$27.94","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/76b9873ddd72eed8fd30a52ee6f035e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the adjustment range for the TF42-24?","answer":"The TF42-24 adjusts from 20.0 to 24.0 Amps, covering motor full-load currents in that window."},{"question":"What contactors does the TF42-24 work with?","answer":"It is designed for use with AF Series contactors in frame sizes AF9 through AF38."},{"question":"Where can I buy the TF42-24 and get current pricing?","answer":"The TF42-24 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 price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/TF42-24","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/abb/TF42-24 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}