{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LC7K120045B7","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LC7K120045B7","canonicalUrl":"https://aoctrl.com/schneider/LC7K120045B7","factsUrl":"https://aoctrl.com/api/mcp/products/LC7K120045B7","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys K LC7K120045B7, 4-pole contactor, 24 V AC 50/60 Hz coil, AC-1 resistive load, PCB mount, 57 mm depth.","salesMarkdown":"The Schneider Electric TeSys K LC7K120045B7 is a 4-pole contactor with 4 normally open (NO) main poles, controlled by a 24 V AC 50/60 Hz silent coil. It's rated for AC-1 utilisation category, meaning it's designed for resistive loads — think heater banks, lighting, or transformer primaries — not motor starting. The part mounts on printed circuit boards via solder pins, so it's a compact, board-level switching solution rather than a DIN-rail panel contactor. This contactor carries approvals across EN/IEC 60947-4-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, and JIS C8201-4-1, so it's accepted in North American, European, and Japanese panels. The IP2X finger protection (per VDE 0106) means the live terminals are shielded from accidental contact — expected for a board-level component, but worth noting if it's exposed in an open chassis. The headline rating here is the AC-1 resistive load capability: the LC7K120045B7 is rated for 20 A at up to 440 V, with an electrical durability of 0.3 million cycles at that load. That's a solid service life for a resistive-switching application — a heater or lighting contactor that cycles a few times an hour will run for years before the contacts wear out. The mechanical durability is 10 million cycles, so the mechanism itself outlasts the electrical contacts by a wide margin. The control circuit is 24 V AC at 50/60 Hz, with an inrush of 3 VA at 20 °C. The coil operates between 0.85 and 1.1 times the rated voltage, and drops out between 0.1 and 0.75 Uc. That's a standard AC coil curve — it holds in well under brownout conditions, but drops reliably when the control signal is removed. The operating time is 30 to 40 ms for closing, and 30 ms for opening, which is typical for a contactor this size. Rated insulation voltage is 600 V per UL 508 and CSA C22.2 No 14, and 690 V per IEC 60947-4-1. The rated breaking capacity is 110 A at 440 V, 80 A at 500 V, and 70 A at 660 to 690 V — these are the fault-clearing numbers, not the continuous rating. The associated fuse recommendation is 25 A gG or aM for the power circuit, so the upstream protection is sized to let the contactor do its job without nuisance tripping. The part carries a B10d safety reliability rating of 1,369,863 cycles at nominal load per EN/ISO 13849-1, and 20 million cycles with mechanical load. That's relevant if this contactor is used in a safety-related control circuit — it gives you the data point for calculating the MTTFd in a safety function. ## Integration Notes This is a PCB-mount contactor, not a DIN-rail part. The solder pins accept a busbar cross-section of 1.5 x 0.9 mm. The heat dissipation is 3 W, so account for that in the enclosure thermal budget if it's running continuously. The maximum operating rate is 3,600 cycles per hour — one cycle per second. That's fast enough for most resistive-load cycling applications, but not for high-speed switching like a PWM load. The average impedance of the power circuit is 3 mOhm at 20 A, 50 Hz, so the voltage drop across the contacts is negligible at rated current.","metaTitle":"Schneider TeSys K LC7K120045B7 Contactor, 24 V AC, 4P","metaDescription":"Schneider Electric TeSys K LC7K120045B7 contactor, 4 NO poles, 24 V AC 50/60 Hz coil, AC-1 resistive load, 0.3 Mcycles electrical durability, 10 Mcycles mechanical. Current lifecyc","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"57 mm","Range":"TeSys","Width":"45 mm","title":"LC7K120045B7","Height":"58 mm","Standards":"EN/IEC 60947-4-1 GB/T 14048.4 UL 60947-4-1 CSA C22.2 No 60947-4-1 JIS C8201-4-1","description":"TeSys K contactor, 4P (4 NO), AC,1 <= 440 V 20 A, 24 V AC coil","Product name":"TeSys K","Operating time":"30...40 ms coil energisation and NO closing 30 ms coil de-energisation and NO opening","lifecycle_stage":"current","Flame retardance":"V1 conforming to UL 94 Requirement 2 conforming to NF F 16-101 Requirement 2 conforming to NF F 16-102","Heat dissipation":"3 W","Mounting support":"Printed circuit boards","Range of product":"TeSys K","Average impedance":"3 mOhm - Ith 20 A 50 Hz for power circuit","Device short name":"LC7K","Poles description":"4P","Compatibility code":"LC7K","Device application":"Control","Inrush power in VA":"3 VA (at 20 °C)","Operating altitude":"2000 m without derating","Control circuit type":"AC at 50/60 Hz silent","Overvoltage category":"III","Protective treatment":"TC conforming to IEC 60068 TC conforming to DIN 50016","Utilisation category":"AC-1","Contactor application":"Resistive load","Electrical durability":"0.3 Mcycles 20 A AC-1 at Ue <= 440 V","Mechanical durability":"10 Mcycles","Mechanical robustness":"Shocks contactor closed, on X axis: 10 Gn for 11 ms conforming to IEC 60068-2-27 Shocks contactor closed, on Y axis: 15 Gn for 11 ms conforming to IEC 60068-2-27 Shocks contactor closed, on Z axis: 15 Gn for 11 ms conforming to IEC 60068-2-27 Shocks contactor opened, on X axis: 6 Gn for 11 ms conforming to IEC 60068-2-27 Shocks contactor opened, on Y axis: 10 Gn for 11 ms conforming to IEC 60068-2-27 Shocks contactor opened, on Z axis: 10 Gn for 11 ms conforming to IEC 60068-2-27 Vibrations contactor closed: 4 Gn, 5...300 Hz conforming to IEC 60068-2-6 Vibrations contactor opened: 2 Gn, 5...300 Hz conforming to IEC 60068-2-6","Associated fuse rating":"25 A gG at 25 A aM for power circuit","Maximum operating rate":"3600 cyc/h","Connections - terminals":"Solder pins - busbar cross section: 1.5 x 0.9 mm","IP degree of protection":"IP2X conforming to VDE 0106","Rated breaking capacity":"110 A at 440 V conforming to IEC 60947 80 A at 500 V conforming to IEC 60947 70 A at 660...690 V conforming to IEC 60947","Pole contact composition":"4 NO","Safety reliability level":"B10d = 1369863 cycles contactor with nominal load conforming to EN/ISO 13849-1 B10d = 20000000 cycles contactor with mechanical load conforming to EN/ISO 13849-1","Product or component type":"Contactor","Irms rated making capacity":"144 A AC for power circuit conforming to NF C 63-110 144 A AC for power circuit conforming to IEC 60947","Signalling circuit frequency":"<= 400 Hz","[Uc] control circuit voltage":"24 V AC 50/60 Hz","[Ui] rated insulation voltage":"Power circuit: 600 V conforming to UL 508 Power circuit: 690 V conforming to IEC 60947-4-1 Power circuit: 600 V conforming to CSA C22.2 No 14","Control circuit voltage limits":"Operational: 0.85...1.1 Uc (at Drop-out: 0.1...0.75 Uc (at <50 °C)","[Ie] rated operational current":"20 A (at 16 A (at <70 °C) at 690 V AC AC-1 for power circuit","[Ue] rated operational voltage":"Power circuit: 690 V AC 50/60 Hz","Hold-in power consumption in VA":"3 VA (at 20 °C)","Ambient air temperature for storage":"-50...80 °C","[Uimp] rated impulse withstand voltage":"8 kV","[Icw] rated short-time withstand current":"115 A 50 °C - 1 s for power circuit 105 A 50 °C - 5 s for power circuit 100 A 50 °C - 10 s for power circuit 75 A 50 °C - 30 s for power circuit 55 A 50 °C - 1 min for power circuit 50 A 50 °C - 3 min for power circuit 25 A 50 °C - >= 15 min for power circuit","[Ith] conventional free air thermal current":"20 A (at 50 °C) for power circuit"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/046e3ba31599666ca44113aa6f0ff828.pdf","sourceUrl":"https://www.se.com/in/en/product/LC7K120045B7/tesys-k-contactor-4p-4-no-ac1-440-v-20-a-24-v-ac-coil/"},"ai":{"faq":[{"question":"What are the key ratings for this contactor?","answer":"The LC7K120045B7 is a 4-pole, 4 NO contactor rated for AC-1 resistive loads. The control voltage is 24 V AC 50/60 Hz. It has an electrical durability of 0.3 million cycles at 20 A AC-1, and a mechanical durability of 10 million cycles. The rated insulation voltage is 600 V (UL) / 690 V (IEC)."},{"question":"What compliance standards does this part meet?","answer":"The LC7K120045B7 complies with EN/IEC 60947-4-1, GB/T 14048.4, UL 60947-4-1, CSA C22.2 No 60947-4-1, and JIS C8201-4-1. It also carries IP2X finger protection per VDE 0106 and a V1 flame retardance rating per UL 94."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LC7K120045B7","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/LC7K120045B7 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}}