{"product_id":"tyn1225-to220-scr-thyristor-25a-1200v-ac-switch-5pack","title":"TYN1225 TO-220 SCR Thyristor 25A 1200V High-Power AC Switch (5-Pack)","description":"\u003ch2\u003eTYN1225 TO-220 SCR Thyristor — 25A \/ 1200V High-Power AC Switch (5-Pack)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eTYN1225\u003c\/strong\u003e is a high-power SCR (Silicon Controlled Rectifier) thyristor from STMicroelectronics in a \u003cstrong\u003eTO-220\u003c\/strong\u003e through-hole package, rated at \u003cstrong\u003e25A RMS\u003c\/strong\u003e and \u003cstrong\u003e1200V\u003c\/strong\u003e blocking voltage. With a low gate trigger current of just \u003cstrong\u003e15mA\u003c\/strong\u003e, it is ideal for \u003cstrong\u003eAC motor speed control, phase-angle power control\u003c\/strong\u003e, and soft-start circuits in industrial and consumer applications.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eTYN1225\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eTO-220 (through-hole)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRMS On-State Current (IT)\u003c\/td\u003e\n\u003ctd\u003e25A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Repetitive Voltage (VDRM)\u003c\/td\u003e\n\u003ctd\u003e1200V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGate Trigger Current (IGT)\u003c\/td\u003e\n\u003ctd\u003e15mA max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGate Trigger Voltage (VGT)\u003c\/td\u003e\n\u003ctd\u003e1.5V max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHolding Current (IH)\u003c\/td\u003e\n\u003ctd\u003e30mA typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-State Voltage (VT)\u003c\/td\u003e\n\u003ctd\u003e1.55V @ 25A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTurn-Off Time (tq)\u003c\/td\u003e\n\u003ctd\u003e~100μs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e−40°C to +125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e5 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eSCR vs TRIAC — When to Use SCR\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSCR (TYN1225)\u003c\/th\u003e\n\u003cth\u003eTRIAC (BTA12-600C)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConduction\u003c\/td\u003e\n\u003ctd\u003eHalf-wave (one direction)\u003c\/td\u003e\n\u003ctd\u003eFull-wave (both directions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Control\u003c\/td\u003e\n\u003ctd\u003eRequires 2 SCRs for full-wave\u003c\/td\u003e\n\u003ctd\u003eSingle device for full-wave\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC Switching\u003c\/td\u003e\n\u003ctd\u003eYes (with commutation circuit)\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003eUp to 1200V+\u003c\/td\u003e\n\u003ctd\u003eTypically up to 800V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eHigh-voltage, DC, half-wave control\u003c\/td\u003e\n\u003ctd\u003eAC load control, dimmers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose TYN1225?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1200V Blocking Voltage\u003c\/strong\u003e — Safe margin for 230V\/400V AC mains applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25A Current Rating\u003c\/strong\u003e — Controls loads up to ~5.75kW @ 230V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Gate Trigger (15mA)\u003c\/strong\u003e — Easily driven by optocoupler (MOC3021) or MCU via transistor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSTMicroelectronics Quality\u003c\/strong\u003e — Consistent parameters for reliable industrial designs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTO-220 Package\u003c\/strong\u003e — Standard heatsink mounting for high-power operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAC motor soft-start circuit (induction motor)\u003c\/li\u003e\n\u003cli\u003ePhase-angle power control (heater, lamp dimmer)\u003c\/li\u003e\n\u003cli\u003eBattery charger rectifier stage\u003c\/li\u003e\n\u003cli\u003eCrowbar overvoltage protection circuit\u003c\/li\u003e\n\u003cli\u003eAC power switch for industrial loads\u003c\/li\u003e\n\u003cli\u003eWelding machine power control\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Gate Drive Circuit\u003c\/h3\u003e\u003cp\u003eUse \u003cstrong\u003eMOC3021\u003c\/strong\u003e optocoupler for isolated gate drive from MCU. Gate resistor: 100–470Ω between optocoupler output and SCR gate. Add RC snubber (100Ω + 10nF) across anode-cathode for dV\/dt protection.\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I turn off a conducting SCR?\u003c\/strong\u003e\u003cbr\u003eA: SCRs latch on once triggered. To turn off: reduce anode current below holding current (IH = 30mA) by removing load or using a commutation circuit. In AC circuits, the SCR turns off naturally at each zero-crossing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can TYN1225 control a 3-phase motor?\u003c\/strong\u003e\u003cbr\u003eA: Yes — use three pairs of back-to-back SCRs (one pair per phase) for 3-phase AC power control. Each pair replaces one TRIAC in a 3-phase controller.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e5× TYN1225 TO-220 SCR Thyristor\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991509094635,"sku":"\u003cnone\u003e","price":9.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/tyn1225-25a-1200v-scr-thyristor-semiconductor.webp?v=1761365635","url":"https:\/\/keszoox.com\/products\/tyn1225-to220-scr-thyristor-25a-1200v-ac-switch-5pack","provider":"Keszoox","version":"1.0","type":"link"}