{"product_id":"ksd9700-thermal-protector-5pcs","title":"5X KSD9700 Temperature Switch 5A 250V, NC\/NO Thermostat for Motor, Battery","description":"## 5Pcs KSD9700 Thermal Protector – NC\/NO Bimetallic Temperature Switch\u003cbr\u003e\n\u003cbr\u003e\nThe KSD9700 is the small bimetallic snap thermostat you'll find inside power\u003cbr\u003e\ntool battery packs, chargers, transformers, motors, ballasts and switch-mode\u003cbr\u003e\nsupplies. When thetemperature at the case reaches its rated trip point, the\u003cbr\u003e\ndisc snaps over and opens (or closes) the circuit – no electronics, no power\u003cbr\u003e\nneeded, and it resets itself once things cool down.\u003cbr\u003e\n\u003cbr\u003e\nFive pieces per pack, so you can fix a tool pack and still have spares on the\u003cbr\u003e\nshelf.\u003cbr\u003e\n\u003cbr\u003e\n### Choose the Right Version\u003cbr\u003e\n\u003cbr\u003e\n| Option | What it does |\u003cbr\u003e\n|---|---|\u003cbr\u003e\n| **NC – Normally Closed** | Conducts when cold, **opens** at the rated temperature. Used to cut power to a heating element or motor when it overheats. |\u003cbr\u003e\n| **NO – Normally Open** | Open when cold, **closes** at the rated temperature. Used to switch on a fan or an alarm once a threshold is reached. |\u003cbr\u003e\n\u003cbr\u003e\n**These are not interchangeable.** Swapping one for the other makes the circuit\u003cbr\u003e\nbehave backwards.\u003cbr\u003e\n\u003cbr\u003e\n### Specifications\u003cbr\u003e\n\u003cbr\u003e\n| Item | Specification |\u003cbr\u003e\n|---|---|\u003cbr\u003e\n| Model | KSD9700 |\u003cbr\u003e\n| Type | Bimetallic snap-action thermal protector, auto-reset |\u003cbr\u003e\n| Switch type | NC or NO ** |\u003cbr\u003e\n| Action temperature | 40°C – 150°C ** |\u003cbr\u003e\n| Temperature tolerance | ±3°C \/ ±5°C ** |\u003cbr\u003e\n| Rated voltage | 250 V AC |\u003cbr\u003e\n| Rated current – resistive | AC 250V \/ 5A, AC 125V \/ 8A |\u003cbr\u003e\n| Rated current – DC | DC 12V \/ 12A, DC 24V \/ 10A |\u003cbr\u003e\n| Contact resistance | ≤50 mΩ ** |\u003cbr\u003e\n| Insulation resistance | \u0026gt;100 MΩ |\u003cbr\u003e\n| Dielectric strength | \u0026gt;800 VAC |\u003cbr\u003e\n| Cycle life | \u0026gt;100,000 cycles ** |\u003cbr\u003e\n| Response | Snaps at the rated temperature; tested at a rate of rise ≤1°C\/min |\u003cbr\u003e\n| Case | Metal or plastic *(按变体)* |\u003cbr\u003e\n| Case size | 20 × 7.4 × 3.8 mm (metal case) \/ 20 × 8.0 × 4.0 mm (plastic case) |\u003cbr\u003e\n| Leads | Tinned copper wire, insulated ** |\u003cbr\u003e\n\u003cbr\u003e\n### Current Ratings – Read This\u003cbr\u003e\n\u003cbr\u003e\nThe 5A figure applies to **resistive loads** (heating elements). Motors,\u003cbr\u003e\ntransformers, solenoids and other **inductive loads** produce a large inrush\u003cbr\u003e\nand back-EMF at switch-off, which welds contacts far sooner than a resistive\u003cbr\u003e\nload does. For inductive or DC loads, derate heavily or add a suppression\u003cbr\u003e\ndiode \/ snubber across the load.\u003cbr\u003e\n\u003cbr\u003e\n### Typical Applications\u003cbr\u003e\n\u003cbr\u003e\n- Lithium and NiMH **power tool battery packs** – cell temperature cutoff\u003cbr\u003e\n- **Chargers and adapters** – overheating protection on the transformer or\u003cbr\u003e\n  heatsink\u003cbr\u003e\n- **Motors** – embedded in the winding to guard against stall and overload\u003cbr\u003e\n- **Switch-mode power supplies and ballasts**\u003cbr\u003e\n- **Heaters, humidifiers, coffee makers** – overtemperature cutoff\u003cbr\u003e\n- **DIY** – fan control, enclosure overheat alarms, 3D printer heated beds\u003cbr\u003e\n\u003cbr\u003e\n### Installation Notes\u003cbr\u003e\n\u003cbr\u003e\n1. **Thermal contact is everything.** Mount the case flat against the surface\u003cbr\u003e\n   you want to monitor. Use thermal adhesive, a clamp, or a mounting bracket –\u003cbr\u003e\n   an air gap makes it trip late or not at all.\u003cbr\u003e\n2. **Do not solder close to the case.** Conducted heat can trip or damage the\u003cbr\u003e\n   disc. Use crimp terminals or keep the iron well away and heatsink the lead.\u003cbr\u003e\n3. **Insulate the terminals** with heat-shrink so they can't short against the\u003cbr\u003e\n   housing.\u003cbr\u003e\n4. Match the rating to the job: the trip temperature should sit just above the\u003cbr\u003e\n   normal running temperature, not at it.\u003cbr\u003e\n\u003cbr\u003e\n### FAQ\u003cbr\u003e\n\u003cbr\u003e\n**Does it reset itself?**\u003cbr\u003e\nYes – it's an auto-reset thermostat. Once the temperature falls back below the\u003cbr\u003e\ntrip point (typically 15–30°C lower), the contacts close again. If you need a\u003cbr\u003e\none-shot cutoff, you want a thermal fuse instead.\u003cbr\u003e\n\u003cbr\u003e\n**What temperature will I receive?**\u003cbr\u003e\nThe temperature is selected as the variant – check the dropdown before\u003cbr\u003e\nordering. Each variant is a single rated temperature, not a mixed range.\u003cbr\u003e\n\u003cbr\u003e\n**Is it AC and DC?**\u003cbr\u003e\nBoth, but the ratings differ. 5A at 250V AC resistive, or 12A at 12V DC. Do\u003cbr\u003e\nnot exceed the rating for your load type.\u003cbr\u003e\n\u003cbr\u003e\n**NC or NO – which do I need?**\u003cbr\u003e\nIf you want to *stop* something getting too hot, you usually want NC. If you\u003cbr\u003e\nwant to *start* something (a fan) once it's hot, you want NO.\u003cbr\u003e\n\u003cbr\u003e\n### Package Includes\u003cbr\u003e\n\u003cbr\u003e\n- 5 × KSD9700 thermal protector (type and temperature as selected)","brand":"DIYMars","offers":[{"title":"40℃ \/ Normally closed","offer_id":53517118439735,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"40℃ \/ Normally open","offer_id":53517118472503,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"45℃ \/ Normally closed","offer_id":53517118505271,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"45℃ \/ Normally open","offer_id":53517118538039,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"50℃ \/ Normally closed","offer_id":53517118570807,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"50℃ \/ Normally open","offer_id":53517118603575,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"55℃ \/ Normally closed","offer_id":53517118636343,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"55℃ \/ Normally open","offer_id":53517118669111,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"60℃ \/ Normally closed","offer_id":53517118701879,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"60℃ \/ Normally open","offer_id":53517118734647,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"65℃ \/ Normally closed","offer_id":53517118767415,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"65℃ \/ Normally open","offer_id":53517118800183,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"70℃ \/ Normally closed","offer_id":53517118832951,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"70℃ \/ Normally open","offer_id":53517118865719,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"75℃ \/ Normally closed","offer_id":53517118898487,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"75℃ \/ Normally open","offer_id":53517118931255,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"80℃ \/ Normally closed","offer_id":53517118964023,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"80℃ \/ Normally open","offer_id":53517118996791,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"85℃ \/ Normally closed","offer_id":53517119029559,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"85℃ \/ Normally open","offer_id":53517119062327,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"90℃ \/ Normally closed","offer_id":53517119095095,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"90℃ \/ Normally open","offer_id":53517119127863,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"95℃ \/ Normally closed","offer_id":53517119160631,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"95℃ \/ Normally open","offer_id":53517119193399,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"100℃ \/ Normally closed","offer_id":53517119226167,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"100℃ \/ Normally open","offer_id":53517119258935,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"105℃ \/ Normally closed","offer_id":53517119291703,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"105℃ \/ Normally open","offer_id":53517119324471,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"110℃ \/ Normally closed","offer_id":53517119357239,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"110℃ \/ Normally open","offer_id":53517119390007,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"115℃ \/ Normally closed","offer_id":53517119422775,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"115℃ \/ Normally open","offer_id":53517119455543,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"120℃ \/ Normally closed","offer_id":53517119488311,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"120℃ \/ Normally open","offer_id":53517119521079,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"125℃ \/ Normally closed","offer_id":53517119553847,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"125℃ \/ Normally open","offer_id":53517119586615,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"130℃ \/ Normally closed","offer_id":53517119619383,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"130℃ \/ Normally open","offer_id":53517119652151,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"135℃ \/ Normally closed","offer_id":53517119684919,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"135℃ \/ Normally open","offer_id":53517119717687,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"140℃ \/ Normally closed","offer_id":53517119750455,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"140℃ \/ Normally open","offer_id":53517119783223,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"145℃ \/ Normally closed","offer_id":53517119815991,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"145℃ \/ Normally open","offer_id":53517119848759,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"150℃ \/ Normally closed","offer_id":53517119881527,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"150℃ \/ Normally open","offer_id":53517119914295,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"155℃ \/ Normally closed","offer_id":53517119947063,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"155℃ \/ Normally open","offer_id":53517119979831,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"160℃ \/ Normally closed","offer_id":53517120012599,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true},{"title":"160℃ \/ Normally open","offer_id":53517120045367,"sku":null,"price":3.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/5562\/4503\/files\/57_d500b9ce-36c8-4b23-b4c5-88cc803e4444.jpg?v=1793845348","url":"https:\/\/www.diymars.com\/pt\/products\/ksd9700-thermal-protector-5pcs","provider":"DIYMars","version":"1.0","type":"link"}