onsemi Specialized ICs - FAN1851AN FAN1851AN

The FAN1851AN is a ground fault interrupter controller designed for AC outlet applications, capable of detecting hazardous grounding conditions in both consumer and industrial environments. It features a tight fault current range of ±100µA and temperature-compensated fault current characteristics, eliminating the need for external trimming. The device interfaces directly with an SCR and operates with a supply voltage derived from the AC line, supporting both 120V and 220V systems. This IC meets UL943 standards and includes adjustable sensitivity settings for grounded neutral fault detection. It has a quiescent current of 450µA and is available in two package options: 8-lead DIP and 8-lead SOIC. The FAN1851AN is designed to minimize false triggering due to line noise and includes circuitry that resets the timing capacitor quickly in response to noise pulses. Its operational temperature range is from -40°C to +70°C, making it suitable for a variety of applications.