{"product_id":"ksd302x-250v-20a-bipolar-temperature-switch-4pin-manual-reset","title":"KSD302X 250V 20A Bipolar Temperature Switch 4-Pin Manual Reset","description":"\u003ch2\u003eKSD302X 250V 20A Bipolar Temperature Switch — 4-Pin Manual Reset Thermostat\u003c\/h2\u003e\n\n\u003cp\u003eKeep your heating appliances and electrical equipment running safely and efficiently with the \u003cstrong\u003eKSD302X Bipolar Temperature Switch\u003c\/strong\u003e. This compact, durable thermostat switch is engineered to monitor and control temperature within a precise 75–95°C range, automatically interrupting the circuit when a set threshold is reached and restoring it via manual reset. It's an essential component for DIY appliance repair, custom heater builds, and industrial wiring projects.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Voltage \u0026amp; Current:\u003c\/strong\u003e 250V AC \/ 20A — handles demanding electrical loads with confidence\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e 75°C – 95°C operating thresholds to suit a variety of heating applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4-Pin Bipolar Design:\u003c\/strong\u003e Interrupts both poles of the circuit simultaneously for enhanced safety\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManual Reset:\u003c\/strong\u003e Requires deliberate reset after activation, preventing unintentional restart\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e 6 × 40 mm metal housing fits neatly into tight enclosures and appliance panels\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Metal Construction:\u003c\/strong\u003e Robust build quality suitable for repeated thermal cycling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Application:\u003c\/strong\u003e Ideal for water heaters, coffee makers, hair dryers, industrial heating elements, and more\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKSD302X T\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e75°C – 95°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePin Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Pin Bipolar\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReset Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eManual Reset\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMetal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 × 40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat Is a Bipolar Temperature Switch?\u003c\/h3\u003e\n\u003cp\u003eA bipolar (double-pole) temperature switch opens both the live and neutral conductors simultaneously when the target temperature is reached. This is a critical safety feature in many heating appliances, ensuring that no residual voltage remains in the circuit after a thermal event. The manual reset mechanism means the device must be physically reset before the appliance can operate again — adding an extra layer of protection against repeated overheating cycles.\u003c\/p\u003e\n\n\u003cp\u003eFor guidance on electrical component safety standards, refer to the U.S. Consumer Product Safety Commission (CPSC), which provides resources on safe use and compliance for electrical and appliance components.\u003c\/p\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDomestic \u0026amp; commercial water heaters\u003c\/li\u003e\n  \u003cli\u003eElectric kettles and coffee machines\u003c\/li\u003e\n  \u003cli\u003eHair dryers and personal care appliances\u003c\/li\u003e\n  \u003cli\u003eIndustrial heating elements and ovens\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and appliance repair projects\u003c\/li\u003e\n  \u003cli\u003eCustom thermal protection circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does the KSD302X 4-pin bipolar temperature switch do?\u003c\/h4\u003e\n\u003cp\u003eA: The KSD302X is a manual-reset thermostat switch that monitors circuit temperature and interrupts power on both poles simultaneously when the set threshold (between 75°C and 95°C) is reached. This helps protect appliances and heating elements from overheating. Once tripped, it must be manually reset before the circuit can be re-energized.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between bipolar and single-pole temperature switches?\u003c\/h4\u003e\n\u003cp\u003eA: A bipolar (double-pole) switch opens both the live and neutral lines at the same time, completely isolating the load from the power source. A single-pole switch only interrupts one conductor. For appliances where full circuit isolation is required for safety, a bipolar switch like the KSD302X is the preferred choice.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the KSD302X compatible with 110V\/120V systems as well as 250V?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The KSD302X is rated at 250V AC \/ 20A, meaning it can safely operate at voltages below its rating, including 110V and 120V systems, as long as the current does not exceed 20A.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I select the correct temperature rating (75°C, 80°C, 85°C, etc.) for my application?\u003c\/h4\u003e\n\u003cp\u003eA: Choose a trip temperature slightly above your appliance's normal maximum operating temperature but well below its damage threshold. For example, if your heater typically runs at 70°C, an 80°C or 85°C rated switch provides a suitable safety margin. The available range for this model is 75–95°C.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the KSD302X 4-pin bipolar temperature switch do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The KSD302X is a manual-reset thermostat switch that monitors circuit temperature and interrupts power on both poles simultaneously when the set threshold (between 75°C and 95°C) is reached. This helps protect appliances and heating elements from overheating. 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