ULN2001A ST Power Distribution Switches

The ULN2001A is a high-voltage high-current Darlington transistor array from STMicroelectronics, featuring seven independent Darlington pairs with common emitters and integral suppression diodes for inductive load driving, specifically designed for 5V TTL logic . For selection, verify output voltage rating of 50V, continuous output current up to 500mA per channel, input compatible with 5V TTL logic signals, 2.7kΩ series base resistors (for ULN2001A), peak surge current capability, and operating temperature from -20°C to +85°C . Features include output clamp diodes for inductive load transient protection, collector-emitter saturation voltage of 1.6V typical at 350mA, and multiple package options. Ideal for relay drivers, stepper motor drivers, solenoid and valve controllers, LED and incandescent lamp displays, logic buffers, and any medium-current load driving application requiring 5V TTL compatibility with built-in protection. In stock at HL Electronics – request a quote for fast delivery.