{"product_id":"uln2003a-sop16-7-channel-darlington-transistor-array-relay-stepper","title":"ULN2003A SOP-16 7-Channel Darlington Transistor Array IC — Relay \u0026 Stepper Driver (5-Pack)","description":"\u003ch2\u003eULN2003A SOP-16 7-Channel Darlington Transistor Array IC — Relay \u0026amp; Stepper Motor Driver (5-Pack)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eULN2003A\u003c\/strong\u003e is a high-voltage, high-current Darlington transistor array in a \u003cstrong\u003eSOP-16\u003c\/strong\u003e surface-mount package, containing \u003cstrong\u003eseven NPN Darlington pairs\u003c\/strong\u003e each rated at \u003cstrong\u003e50V \/ 500mA\u003c\/strong\u003e with built-in \u003cstrong\u003eflyback protection diodes\u003c\/strong\u003e. It is the standard IC for driving relays, stepper motors, solenoids, and LED arrays from 3.3V\/5V MCU GPIO signals.\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\u003eULN2003A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eSOP-16 (SMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Channels\u003c\/td\u003e\n\u003ctd\u003e7 (independent Darlington pairs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage (Max)\u003c\/td\u003e\n\u003ctd\u003e50V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current (per channel)\u003c\/td\u003e\n\u003ctd\u003e500mA continuous (600mA peak)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage (Logic HIGH)\u003c\/td\u003e\n\u003ctd\u003e2.4V – 5V (TTL\/CMOS compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current (per channel)\u003c\/td\u003e\n\u003ctd\u003e~1mA @ VIN=5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlyback Diodes\u003c\/td\u003e\n\u003ctd\u003eBuilt-in (one per channel, common anode to COM pin)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSaturation Voltage (VCE(sat))\u003c\/td\u003e\n\u003ctd\u003e~1.1V @ 350mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e−40°C to +85°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\u003eULN2003A vs ULN2803A\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eULN2003A\u003c\/th\u003e\n\u003cth\u003eULN2803A\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eDIP-16 \/ SOP-16\u003c\/td\u003e\n\u003ctd\u003eDIP-18 \/ SOP-18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Logic\u003c\/td\u003e\n\u003ctd\u003e5V TTL\/CMOS\u003c\/td\u003e\n\u003ctd\u003e5V TTL\/CMOS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current\u003c\/td\u003e\n\u003ctd\u003e500mA per channel\u003c\/td\u003e\n\u003ctd\u003e500mA per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eStepper motor (28BYJ-48), 7-relay bank\u003c\/td\u003e\n\u003ctd\u003e8-relay bank, 8-channel driver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose ULN2003A?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e7 Channels in One IC\u003c\/strong\u003e — Drives 7 relays, 7 LEDs, or 4-phase stepper motor from a single package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in Flyback Diodes\u003c\/strong\u003e — Protects MCU from inductive kickback when switching relays and solenoids\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50V \/ 500mA Per Channel\u003c\/strong\u003e — Handles 5V, 12V, and 24V relay coils and solenoids\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.3V\/5V Input Compatible\u003c\/strong\u003e — Directly driven from ESP32, Arduino, Raspberry Pi GPIO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSOP-16 SMD Package\u003c\/strong\u003e — Compact footprint for modern PCB relay driver designs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e28BYJ-48 stepper motor driver (4-phase unipolar, uses 4 of 7 channels)\u003c\/li\u003e\n\u003cli\u003e7-channel relay bank driver from Arduino\/ESP32\u003c\/li\u003e\n\u003cli\u003eSolenoid valve driver for pneumatic and hydraulic systems\u003c\/li\u003e\n\u003cli\u003eHigh-current LED array driver (up to 500mA per LED string)\u003c\/li\u003e\n\u003cli\u003eLamp and incandescent bulb switching from MCU\u003c\/li\u003e\n\u003cli\u003eIndustrial output module for PLC I\/O expansion\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I connect ULN2003A to drive a 12V relay from Arduino?\u003c\/strong\u003e\u003cbr\u003eA: Connect Arduino GPIO to ULN2003A input pin (IN1–IN7). Connect relay coil between 12V supply and ULN2003A output pin (OUT1–OUT7). Connect COM pin to 12V supply (for flyback diode). Connect GND to Arduino GND and 12V GND.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can ULN2003A drive a 28BYJ-48 stepper motor?\u003c\/strong\u003e\u003cbr\u003eA: Yes — the 28BYJ-48 ULN2003 driver board uses exactly this IC. Connect IN1–IN4 to Arduino pins 8–11, OUT1–OUT4 to stepper motor coils, VCC to 5V.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e5× ULN2003A SOP-16 Darlington Transistor Array IC\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"10PCS-ULN2003A","offer_id":46991509324011,"sku":"14:350852#10PCS-ULN2003A","price":5.12,"currency_code":"USD","in_stock":true},{"title":"20PCS-ULN2003A","offer_id":46991509356779,"sku":"14:10#20PCS-ULN2003A","price":6.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/uln2003a-sop16-darlington-transistor-array-ic-chip-smd.webp?v=1761364751","url":"https:\/\/keszoox.com\/products\/uln2003a-sop16-7-channel-darlington-transistor-array-relay-stepper","provider":"Keszoox","version":"1.0","type":"link"}