ULN 2804

The ULN 2804 is a high-voltage, high-current Darlington transistor array designed to simplify the interface between low-level control signals and substantial power loads. It integrates seven open-collector Darlington pairs in a single package to reduce circuit complexity and save board space while enabling reliable load driving across a variety of applications. Seven open-collector Darlington pairs in one compact package for multi-channel driving. Maximum collector current rating of 500 mA per channel for robust load handling. Collector-emitter voltage support up to 50 V suitable for higher-voltage uses. Built-in free-wheeling diodes provide protection for inductive loads and enhance device reliability. Thermally optimized design to handle power dissipation efficiently under load. By employing Darlington pairs, the ULN 2804 delivers high current gain so that minimal input current is required from the control circuitry. The integrated free-wheeling diodes prevent damaging voltage spikes from inductive loads, protecting downstream components and improving system longevity. Its combination of elevated voltage and current handling, multiple channels, and protective features makes the ULN 2804 well suited for driving relays, motors, lamps, and similar loads in industrial and consumer electronics. The compact integration of these functions simplifies wiring and layout while providing stable operation under demanding conditions.