{"product_id":"chz02s112la2-power-relay-whatsminer-p221c-p222c","title":"CHZ02-S-112LA2 Power Relay for Whatsminer P221C P222C PSU","description":"\u003ch2\u003eCHZ02-S-112LA2 Power Relay | Whatsminer P221C and P222C PSU Replacement\u003c\/h2\u003e\n\u003cp\u003eEnsure reliable power control for the \u003cstrong\u003eWhatsminer P221C and P222C power supply units\u003c\/strong\u003e with the \u003cstrong\u003eCHZ02-S-112LA2 power relay\u003c\/strong\u003e. This essential PSU component manages the AC input switching stage — driving the high-current relay that connects mains AC to the converter front-end — and a degraded relay quickly translates into PSU startup failures, intermittent shutdowns, or full PSU loss on a P221C \/ P222C board.\u003c\/p\u003e\n\u003cp\u003eMeasuring a compact \u003cstrong\u003e29.2 × 12.8 × 20.9mm\u003c\/strong\u003e, the relay carries a \u003cstrong\u003e12V coil with 4 pins\u003c\/strong\u003e in both sensitive and standard variants. Built around \u003cstrong\u003esilver-alloy contacts\u003c\/strong\u003e for excellent conductivity and durability, with an initial \u003cstrong\u003econtact resistance of ≤100mΩ at 6VDC, 1A\u003c\/strong\u003e, the part establishes efficient electrical connections that hold their characteristics across the relay's mechanical service life. The 16A switching capability provides headroom over the typical AC-input current of a single ASIC PSU.\u003c\/p\u003e\n\u003ch3\u003eReliable Performance and Wide Compatibility — CHZ02-S-112LA2 Power Relay\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum switching voltage 250VAC \/ 30VDC\u003c\/strong\u003e — handles the AC input switching stage on standard ASIC PSU designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum switching current 16A\u003c\/strong\u003e with \u003cstrong\u003emaximum switching power 4000VA \/ 480W\u003c\/strong\u003e — full headroom for ASIC PSU input duty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilver-alloy contacts\u003c\/strong\u003e with ≤100mΩ initial contact resistance for clean electrical performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation resistance ≥1000MΩ at 500VDC\u003c\/strong\u003e, dielectric strength 5000VAC between coils and 1000VAC across open contacts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurge voltage 10000V (1.2\/50µs)\u003c\/strong\u003e between coil and contact — solid protection against transient events.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-40°C to +85°C ambient\u003c\/strong\u003e operating range — covers the full deployment envelope of mining-farm conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere the CHZ02-S-112LA2 Fits\u003c\/h3\u003e\n\u003cp\u003eThis is the workhorse power relay on the Whatsminer P221C and P222C PSU boards — exactly the part that engages when the PSU receives the start command from the miner controller. When the relay degrades, the symptoms show up as a PSU that won't start, that requires multiple power cycles to come up, that drops the load mid-mining session, or that produces an audible chatter on power-up (sticky \/ partial contact engagement). Replacing the CHZ02-S-112LA2 with a fresh unit restores the input switching stage and brings the PSU back to spec.\u003c\/p\u003e\n\u003ch4\u003eCHZ02-S-112LA2 Power Relay Features\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Material\u003c\/td\u003e\n\u003ctd\u003eSilver Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInitial Contact Resistance\u003c\/td\u003e\n\u003ctd\u003eMaximum 100mΩ @ 6VDC, 1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Switching Voltage\u003c\/td\u003e\n\u003ctd\u003e250VAC \/ 30VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Switching Current\u003c\/td\u003e\n\u003ctd\u003e16A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Switching Power\u003c\/td\u003e\n\u003ctd\u003e4000VA \/ 480W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation Resistance\u003c\/td\u003e\n\u003ctd\u003e1000MΩ min (500VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDielectric Strength\u003c\/td\u003e\n\u003ctd\u003eBetween coils: 5000VAC, Open contact: 1000VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge Voltage (Coil ↔ Contact)\u003c\/td\u003e\n\u003ctd\u003e10000V (1.2\/50µs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C (no icing or condensation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient Humidity Operation\u003c\/td\u003e\n\u003ctd\u003e20% to 85% relative humidity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoil Voltage\u003c\/td\u003e\n\u003ctd\u003e12V (4 pins, sensitive \u0026amp; standard variants)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e29.2 × 12.8 × 20.9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eFAQ — CHZ02-S-112LA2 Power Relay\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I tell if the relay is the failed component vs another part of the PSU?\u003c\/strong\u003e\u003cbr\u003eA: Three signs point to relay failure: (1) audible chatter or buzzing on power-up; (2) PSU requires multiple power cycles to start; (3) bench-tested coil drive shows correct 12V but contacts don't make. Confirm with a multimeter in continuity mode across the contacts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Sensitive vs standard coil — which one do I need?\u003c\/strong\u003e\u003cbr\u003eA: Both variants share the same physical footprint and switching specs; they differ only in coil current draw. Confirm with our sales team which variant your specific P221C \/ P222C board uses before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I substitute a different brand of 12V \/ 16A relay?\u003c\/strong\u003e\u003cbr\u003eA: Pin-compatible 12V \/ 16A SPDT relays in the same footprint may work, but the original CHZ02-S-112LA2 is the OEM-spec part — we recommend matching it for repair work, especially on PSUs returning to production duty.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does it work on P221B \/ P222B as well?\u003c\/strong\u003e\u003cbr\u003eA: The CHZ02-S-112LA2 is specified for P221C \/ P222C. Earlier B-revision boards may use a different relay — confirm before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Bulk pricing available?\u003c\/strong\u003e\u003cbr\u003eA: Yes — email contact@lys-sz.com for tray-quantity pricing.\u003c\/p\u003e\n\u003ch3\u003eRelated products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/hfd4-5-signal-relay-dpdt-2a-250v-switching-dip8-industrial-grade\"\u003eHFD4\/5 DPDT Signal Relay (DIP-8)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/slm346-isolated-gate-driver-whatsminer-p221-p222-power-supply\"\u003eSLM346 Isolated Gate Driver – Whatsminer P221\/P222 PSU\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/ob2276cp-pwm-control-ic-power-management-whatsminer-p222b\"\u003eOB2276CP PWM Control IC (Whatsminer P222B)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/whatsminer-c19-16a-power-socket-250v-connector-psu\"\u003eWhatsminer C19 16A Power Socket (P21\/P222 PSU)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eP221C \/ P222C repair benches ordering CHZ02-S-112LA2 relays in volume? Email \u003ca href=\"mailto:contact@lys-sz.com\"\u003econtact@lys-sz.com\u003c\/a\u003e for bulk pricing and matched PSU repair kits. Worldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":42630453887155,"sku":null,"price":0.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/CHZ02-S-112LA2-Power-Relay-Whatsminer-P221C-P222C-Power-Supply.webp?v=1773987189","url":"https:\/\/lys-sz.com\/products\/chz02s112la2-power-relay-whatsminer-p221c-p222c","provider":"LYS Shenzhen","version":"1.0","type":"link"}