ULN2004 / ULN2004A 7-Channel Darlington Array IC SOP-16 SMD – Pack of 10

ULN2004 / ULN2004A 7-Channel Darlington Array IC – SOP-16 SMD, Pack of 10

The ULN2004 / ULN2004A in SOP-16 is the surface-mount version of the classic DIP-16 Darlington array – seven high-voltage, high-current NPN Darlington transistor pairs in a compact SMD package, each capable of sinking 500mA at up to 50V. Built-in flyback diodes protect against inductive load transients from relays, solenoids, and motors. The ULN2004A variant is specifically optimized for PMOS and CMOS logic inputs (5V–15V), making it the correct choice for driving loads from Arduino, Raspberry Pi, and 5V microcontroller GPIO. This 10-piece SOP-16 pack is ideal for PCB production and repair.

Electrical Specifications

• Part Number: ULN2004 / ULN2004A / TD62004AF (SOP-16)
• Package: SOP-16 (SMD, 1.27mm pitch)
• Channels: 7 (independent NPN Darlington pairs)
• Output Voltage (max): 50V
• Output Current (per channel): 500mA (continuous), 600mA (peak)
• Input Voltage (logic HIGH): 5V – 15V (PMOS/CMOS compatible)
• Built-in Input Resistor: 10.5kΩ per channel
• Built-in Flyback Diodes: Yes (COM pin to load supply)
• VCE Saturation: ~1V at 350mA
• Operating Temperature: −40°C to +85°C

SOP-16 vs DIP-16 – Package Selection

• ULN2004A (DIP-16): Through-hole, breadboard and through-hole PCB use
• ULN2004 (SOP-16): SMD surface-mount, for PCB production and space-constrained designs
• Functionally identical – same electrical specifications, different package
• Choose SOP-16 for PCB production; choose DIP-16 for prototyping and repair

Typical Applications

• Relay driver PCBs: Drive 5V–12V relay coils from microcontroller GPIO on PCB designs
• Stepper motor driver: Drive unipolar stepper motor coils from MCU
• Solenoid valve control: Industrial and automotive solenoid driver
• High-current LED arrays: Drive LED strips and arrays beyond GPIO limits
• Industrial I/O: Interface 5V logic to 12V/24V industrial loads
• PCB repair: SMD replacement for failed ULN2004 in consumer electronics

Package Contents

• 10 × ULN2004 / ULN2004A SOP-16 7-channel Darlington array ICs

Seven channels, 500mA each, built-in flyback diodes in a compact SOP-16 SMD package – the ULN2004 is the essential relay and motor driver IC for PCB production and surface-mount designs.

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