RV4145AN

The RV4145AN from On Semiconductor is a specialized integrated circuit designed for use in AC outlet ground fault interrupters (GFIs). This low-power controller is capable of detecting hazardous grounding conditions, such as when equipment connected to opposite phases of the AC line comes into contact with water. Upon detection, it rapidly opens the circuit to prevent potentially harmful or lethal electric shocks.

Internally, the RV4145A integrates a 26V Zener shunt regulator, an operational amplifier, and an SCR driver. With the addition of external components like sense transformers, a bridge rectifier, an SCR, and a relay, this IC can provide protection against both hot-wire-to-ground and neutral-wire-to-ground faults. Its design emphasizes ease of application and long-term reliability, making it suitable for both 120V and 220V systems.

The device features adjustable sensitivity and grounded neutral fault detection. It requires no external potentiometer for its operation and offers direct interface to a Silicon-Controlled Rectifier (SCR). The RV4145AN operates within a temperature range of -35°C to 85°C and is available in an 8-DIP package suitable for through-hole mounting.

Key features include a quiescent current of 450 µA and a supply current of 18 mA. The RV4145AN meets U.L. 943 standards and is a Pb-Free device, aligning with environmental regulations.