UNISONIC TECHNOLOGIES CO., LTD

GM1851

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2008 Unisonic Technologies Co., Ltd

QW-R122-007,B

GROUND FAULT

INTERRUPTER

DESCRIPTION

The UTC GM1851 can specially provide ground fault protection

for AC power outlets in consumer and industrial environments. As

ground fault currents greater than a presentable threshold value, it

will trigger an external SCR-driven circuit breaker to interrupt the

AC line and remove the fault condition. Besides of detection of

conventional hot wire to ground faults, the neutral fault condition is

detected also. In the event that noise pulses introduce unwanted

charging currents and a memory circuit that allows firing of even a

sluggish breaker on either half-cycle of the line voltage when

external full-wave rectification is used, circuitry that rapidly resets

the timing capacitor.

FEATURES

* Internal power supply shunt regulator

* Externally programmable fault current threshold

* Externally programmable fault current integration time

* Direct interface to SCR

* Operates under line reversal; both load vs line and hot vs neutral

* Detects neutral line faults

Lead-free:

GM1851L

Halogen-free: GM1851G

ORDERING INFORMATION

Ordering Number

Normal

Lead Free

Halogen Free

Package

Packing

GM1851-S08-R

GM1851L-S08-R

GM1851G-S08-R

SOP-8

Tape Reel

GM1851-D08-T

GM1851L-D08-T

GM1851G-D08-T

DIP-8

Tube