{"product_id":"mjd127g-to252-pnp-darlington-transistor-tip127-mjd127-5pcs","title":"MJD127G TO-252 PNP Darlington Transistor — TIP127 \/ MJD127 Series (5pcs)","description":"\u003ch2\u003eMJD127G — TO-252 PNP Darlington Transistor (TIP127 \/ MJD127 Series)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eMJD127G\u003c\/strong\u003e is a \u003cstrong\u003ePNP Darlington transistor\u003c\/strong\u003e in compact \u003cstrong\u003eTO-252 SMD package\u003c\/strong\u003e, part of the \u003cstrong\u003eTIP127 \/ MJD127 series\u003c\/strong\u003e. With a collector current of \u003cstrong\u003e5A\u003c\/strong\u003e, collector-emitter voltage of \u003cstrong\u003e100V\u003c\/strong\u003e, and Darlington gain exceeding \u003cstrong\u003ehFE \u0026gt; 1000\u003c\/strong\u003e, it's ideal for high-current switching, motor drivers, and relay drivers controlled by low-current microcontroller signals. This listing provides \u003cstrong\u003e5 pieces\u003c\/strong\u003e.\u003c\/p\u003e\u003chr\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Numbers\u003c\/td\u003e\n\u003ctd\u003eMJD127G \/ MJD127 \/ TIP127 (equiv.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePNP Darlington BJT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eTO-252 (D-PAK, SMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollector-Emitter Voltage (Vceo)\u003c\/td\u003e\n\u003ctd\u003e100V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollector Current (Ic)\u003c\/td\u003e\n\u003ctd\u003e5A (continuous)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation (Pd)\u003c\/td\u003e\n\u003ctd\u003e20W (with heatsink\/PCB copper)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC Current Gain (hFE)\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;1000 (Darlington)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSaturation Voltage (Vce(sat))\u003c\/td\u003e\n\u003ctd\u003e~2V @ 3A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt-in Flyback Diode\u003c\/td\u003e\n\u003ctd\u003eYes (base-emitter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-55°C to +150°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e5 PCS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch3\u003eMJD127 vs TIP127 Comparison\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eMJD127G (TO-252)\u003c\/th\u003e\n\u003cth\u003eTIP127 (TO-220)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eTO-252 SMD\u003c\/td\u003e\n\u003ctd\u003eTO-220 Through-hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVceo\u003c\/td\u003e\n\u003ctd\u003e100V\u003c\/td\u003e\n\u003ctd\u003e100V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIc\u003c\/td\u003e\n\u003ctd\u003e5A\u003c\/td\u003e\n\u003ctd\u003e5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePd\u003c\/td\u003e\n\u003ctd\u003e20W\u003c\/td\u003e\n\u003ctd\u003e65W (with heatsink)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePCB Mount\u003c\/td\u003e\n\u003ctd\u003eSMD (compact)\u003c\/td\u003e\n\u003ctd\u003eThrough-hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch3\u003eWhy Choose MJD127G?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eDarlington gain hFE \u0026gt; 1000\u003c\/strong\u003e — 5A load switched by \u0026lt;5mA base current from MCU GPIO\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eTO-252 SMD package\u003c\/strong\u003e — compact footprint, PCB-mountable without heatsink at moderate currents\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e100V Vceo\u003c\/strong\u003e — handles inductive load voltage spikes safely\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eBuilt-in flyback diode\u003c\/strong\u003e — protects against inductive kickback from motors and relays\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eTIP127 pin-compatible\u003c\/strong\u003e — SMD equivalent for existing TIP127 designs\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eCompatible With \/ Works With\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eArduino\/ESP32 GPIO high-current switching (5V\/3.3V base drive)\u003c\/li\u003e\n\u003cli\u003eRelay coil driver (12V relay, 100mA coil current)\u003c\/li\u003e\n\u003cli\u003eDC motor driver (low-speed, low-current motors up to 5A)\u003c\/li\u003e\n\u003cli\u003eLED array driver (high-current LED matrix, common-anode)\u003c\/li\u003e\n\u003cli\u003eComplementary NPN pair: MJD117G (NPN Darlington, TO-252)\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelay Driver\u003c\/strong\u003e — Arduino GPIO drives 12V relay coil via MJD127G PNP switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Driver\u003c\/strong\u003e — high-side PNP switch for DC motor in H-bridge configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED Array Driver\u003c\/strong\u003e — common-anode LED matrix row driver with 5A capability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad Switch\u003c\/strong\u003e — high-side switch for 12V\/24V loads controlled by 3.3V MCU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Power Stage\u003c\/strong\u003e — PNP output transistor in class-AB amplifier\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Can MJD127G replace TIP127 directly?\u003c\/strong\u003e\u003cbr\u003eA: Electrically yes — same Vceo, Ic, and hFE. Package differs: MJD127G is TO-252 (SMD), TIP127 is TO-220 (through-hole). Use MJD127G for SMD PCB designs; TIP127 for through-hole or breadboard.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Does MJD127G need a base resistor when driven from Arduino?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Calculate base resistor: Rb = (Vcc - Vbe) \/ Ib. For 5V Arduino driving 1A load: Ib = 1A \/ 1000 = 1mA, Rb = (5V - 1.4V) \/ 1mA = 3.6kΩ. Use 3.3kΩ or 4.7kΩ.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the Vce(sat) of MJD127G?\u003c\/strong\u003e\u003cbr\u003eA: ~2V at 3A (Darlington transistors have higher saturation voltage than single BJTs). For low-dropout switching, consider a MOSFET (IRF4905 P-channel) instead.\u003c\/p\u003e\u003chr\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e5× MJD127G TO-252 PNP Darlington Transistor\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991482585323,"sku":"\u003cnone\u003e","price":5.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/mjd127g-to252-pnp-transistor.webp?v=1761545038","url":"https:\/\/keszoox.com\/products\/mjd127g-to252-pnp-darlington-transistor-tip127-mjd127-5pcs","provider":"Keszoox","version":"1.0","type":"link"}