UNISONIC TECHNOLOGIES CO., LTD

GF4146

CMOS IC

www.unisonic.com.tw

1 of 5

Copyright © 2017 Unisonic Technologies Co., Ltd

QW-R121-032.B

GROUND FAULT INTERRUPTER

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DESCRIPTION

The UTC GF4146 is a two-wire low-power controller for Residual

Current Devices (RCD) and AC outlet Appliance Leakage Circuit

Interrupters (ALCI) . The UTC GF4146 detects hazardous grounding

conditions and open circuits the line before a harmful shock occurs.

Internally, the UTC GF4146 contains a diode rectifier, 12V shunt

regulator using a precision temperature-compensated bandgap

filter, window-detection comparators, and a SCR driver. With the

addition of a minimum number of external components, the UTC

GF4146

detects and protects against a hot-wire-to-ground fault.

The UTC GF4146 circuitry has a built-in rectifier and shunt

regulator that operates with a low quiescent current. This allows for a

high-value, low-wattage-series supply resistor.

The internal temperature compensated shunt regulator, sense amplifier, and bias circuitry provide for precision

feedback signal. This eliminates the large 50/60Hz AC-coupling capacitor. The internal delay filter rejects

high-frequency noise spikes common with inductive loads. This decreases false nuisance tripping. The internal

SCR driver is temperature compensated and designed to satisfy the current requirements for a wide selection of

external SCRs.

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FEATURES

* For Two-Wire ALCI and RCD Applications

* Precision Sense Amplifier and Bandgap Reference

* Built-in AC Rectifier

* Direct DC Coupled to Sense Coil

* Low-Voltage SCR Disable

* Adjustable Sensitivity

* Built-in Noise Filter

* SCR Gate Driver

* Minimum External Components

* Meets UL 943B Requirements

* Ideal for 120V or 220V Systems

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ORDERING INFORMATION

Ordering Number

Lead Free

Halogen Free

Package

Packing

GF4146L-AG6-R

GF4146G-AG6-R

SOT-26

Tape Reel

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MARKING