{"product_id":"yh02a-electromagnetic-push-button-safety-switch-ip55-kld28a-kjd17a","title":"YH02A IP55 Electromagnetic Push Button Safety Switch – KLD28A KJD17A","description":"\n\u003ch2\u003eYH02A Electromagnetic Push Button Safety Switch – IP55 Waterproof | Replaces KLD28A \u0026amp; KJD17A\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eYH02A Electromagnetic Push Button Switch\u003c\/strong\u003e is a CE-certified, IP55-rated safety switch engineered for machine tools, large power tools, and garden machinery. Featuring copper contacts and a robust electromagnetic design, this switch provides dependable under-voltage and power-off protection — automatically preventing the machine from restarting after an unexpected power loss. Simply press the green start button to resume operation, keeping operators safe at all times.\u003c\/p\u003e\n\n\u003cp\u003eIt is a direct replacement for \u003cstrong\u003eKLD28A\u003c\/strong\u003e and \u003cstrong\u003eKJD17A\u003c\/strong\u003e models, making upgrades and maintenance fast and straightforward.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIP55 Waterproof Protection\u003c\/strong\u003e — Dust and water-resistant housing for demanding workshop and outdoor environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnder-Voltage \u0026amp; Power-Off Protection\u003c\/strong\u003e — Machine will NOT restart automatically after power is cut; requires a deliberate press of the green start button\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDouble Pole Cut-Off\u003c\/strong\u003e — Full disconnection of the circuit for maximum safety\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrake Function\u003c\/strong\u003e — Single-pole cut-off brake option available\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverload Protection Compatible\u003c\/strong\u003e — Can be combined with an overload protection switch for complete under-voltage and overload safeguarding\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCopper Contacts\u003c\/strong\u003e — Durable, corrosion-resistant conductivity for long service life\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4-Pin or 5-Pin Configuration\u003c\/strong\u003e — Flexible wiring to suit a variety of machine tool setups\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE Certified\u003c\/strong\u003e — Meets international safety standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYH02-A (Replaces KLD28A, KJD17A)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC 250V \/ AC 110V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8A @ AC 250V | 16A @ AC 110V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoil Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e220–240V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePin Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Pin \/ 5-Pin\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtection Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP55\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Cycles\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 × 10⁴\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT85\/55\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCopper (contacts)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLathes, milling machines, and workshop machine tools\u003c\/li\u003e\n  \u003cli\u003eTable saws, bench grinders, and large power tools\u003c\/li\u003e\n  \u003cli\u003eGarden machinery (wood chippers, lawn tractors, etc.)\u003c\/li\u003e\n  \u003cli\u003eIndustrial equipment requiring restart-prevention safety switches\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eRelated Products You May Need\u003c\/h3\u003e\n\u003cp\u003eKeep your workshop fully equipped:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0–10\/0–12\/0–25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/garden-pruner-shears-secateurs-bonsai-fruit-trees\"\u003eGarden Pruner Shears – Secateurs for Bonsai \u0026amp; Fruit Trees\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eQ: What machines is the YH02A electromagnetic push button switch compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The YH02A is widely used with machine tools (lathes, mills, grinders), large bench power tools, and garden machinery. It is a direct drop-in replacement for KLD28A and KJD17A switches, so any machine originally fitted with those models will accept the YH02A without modification.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the YH02A switch restart automatically after a power outage?\u003c\/h4\u003e\n\u003cp\u003eA: No — this is one of its most important safety features. After an unexpected power loss, the electromagnetic mechanism keeps the switch in the OFF position. An operator must deliberately press the green start button to restart the machine, preventing accidental or uncontrolled startups.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does the IP55 rating mean for this switch?\u003c\/h4\u003e\n\u003cp\u003eA: IP55 means the switch is protected against dust ingress and low-pressure water jets from any direction. This makes it suitable for dusty workshops, outdoor power equipment, and garden machinery where moisture and debris are common concerns.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can the YH02A be used with an overload protection switch?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. Both the double-pole cut-off version and the single-pole brake version can be combined with a separate overload protection switch to achieve comprehensive under-voltage and overload protection for your equipment.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What machines is the YH02A electromagnetic push button switch compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The YH02A is widely used with machine tools (lathes, mills, grinders), large bench power tools, and garden machinery. 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