{"product_id":"auirf4905s-p-channel-mosfet-55v-d2pak","title":"AUIRF4905S P-Channel MOSFET - 55V 42A Power Transistor D2PAK","description":"\u003ch2\u003eAUIRF4905S P-Channel MOSFET | 55V 42A Automotive-Grade Power Transistor in D2PAK\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAUIRF4905S\u003c\/strong\u003e is a \u003cstrong\u003e55V P-Channel power MOSFET\u003c\/strong\u003e in the \u003cstrong\u003eD2PAK (TO-263) surface-mount package\u003c\/strong\u003e, automotive-grade qualified for repetitive avalanche capability and 175°C operation. P-channel MOSFETs are the high-side switch of choice for power-management circuits where a single supply rail simplifies gate-drive design — common on motor controllers, battery protection circuits, and reverse-polarity protection blocks.\u003c\/p\u003e\n\u003cp\u003eHeadline specs: \u003cstrong\u003eVDS 55V, ID 42A continuous (70A pulsed), RDS(on) 20mΩ at VGS = 10V, Qg 120nC typical, ±20V VGS range, 170W power dissipation, 175°C operation\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhen You Need the AUIRF4905S\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-side switch failure\u003c\/strong\u003e on motor controllers, EV power management, or DC distribution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery protection circuit repair\u003c\/strong\u003e — failed P-channel pass element.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReverse-polarity protection block\u003c\/strong\u003e needs replacement after a wrong-polarity event.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible damage\u003c\/strong\u003e on the D2PAK package — burnt or cracked.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAUIRF4905S Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eP-Channel MOSFET\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVDS (Drain-Source Voltage)\u003c\/td\u003e\n\u003ctd\u003e55V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eID (Continuous Drain Current)\u003c\/td\u003e\n\u003ctd\u003e42A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eID (Pulsed)\u003c\/td\u003e\n\u003ctd\u003e70A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRDS(on) @ VGS = 10V\u003c\/td\u003e\n\u003ctd\u003e20mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQg (Gate Charge) typical\u003c\/td\u003e\n\u003ctd\u003e120nC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVGS Range\u003c\/td\u003e\n\u003ctd\u003e±20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e170W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Junction Temperature\u003c\/td\u003e\n\u003ctd\u003e175°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQualification\u003c\/td\u003e\n\u003ctd\u003eAutomotive-grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eD2PAK (TO-263 SMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eFAQ — AUIRF4905S MOSFET\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: P-Channel vs N-Channel — when do I need each?\u003c\/strong\u003e\u003cbr\u003eA: P-channel is for high-side switching (load between drain and ground, switch between supply and drain) — simplifies gate-drive when no boost circuit is available. N-channel is for low-side switching with simpler drive but requires a bootstrap circuit for high-side use. The AUIRF4905S is specifically the P-channel variant.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I test a P-channel MOSFET?\u003c\/strong\u003e\u003cbr\u003eA: Multimeter in diode-test mode. Probe source-to-drain: healthy P-channel shows ~0.5V body-diode drop with positive lead on drain, OL with reversed polarity. Shorted = ~0V both ways; open = OL both ways. Note polarity is opposite to N-channel testing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: D2PAK rework?\u003c\/strong\u003e\u003cbr\u003eA: Standard SMD reflow at 250°C peak with proper preheat. The exposed tab on the D2PAK must reflow with the PCB thermal pad — apply solder paste to the thermal pad before placing the device.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Bulk pricing?\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\/ncep60t18-60v-n-channel-mosfet-asic-psu\"\u003eNCEP60T18 60V N-Channel MOSFET (180A)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/2sd882tp-npn-semiconductor-triode-high-performance-avalon-miner-repair\"\u003e2SD882T-P NPN Transistor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/2sc4672t100q-dk-npn-silicon-epitaxial-transistor-lovecore-loveminer-a1-psu-repair\"\u003e2SC4672T100Q NPN Transistor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/d100n06esl-100a-60v-n-channel-mosfet-asic-miner-psu\"\u003eD100N06ESL 100A 60V MOSFET\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRepair benches stocking AUIRF4905S P-Channel MOSFETs in volume? Email \u003ca href=\"mailto:contact@lys-sz.com\"\u003econtact@lys-sz.com\u003c\/a\u003e for bulk pricing. Worldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":44632957943987,"sku":null,"price":4.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/Original-AUIRF4905S-P-Channel-MOSFET-55V-42A-Automotive-Grade-Power-Transistor-D2PAK.webp?v=1745371017","url":"https:\/\/lys-sz.com\/products\/auirf4905s-p-channel-mosfet-55v-d2pak","provider":"LYS Shenzhen","version":"1.0","type":"link"}