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HT54123A
Earth Leakage Detector
Features
• Low Power Consumption PD =5mW, 100V/200V • Built-in Voltage Regulator • High Gain Differential Amplifier • 0.4mA Output Current Pulse to Trigger SCR' S • Low External Part Count • DIP Package (8-DIP), High Packing Density • High Noise Immunity, Large Surge Margin • Super Temperature Characteristic of Input Sensitivity • Wide Operating Temperature Range (TA = -25°C ~
+80°C) • Operation from 12 to 20V Input
Functions
• Differential Amplifier • Level Comparator • Latch Circuit
Block Diagram
Description
The HT54123 is designed for use in earth leakage circuit interrupters, for stable operation of the AC line in breakers. The input of the differential amplifier is connected to the secondary coil of ZCT(Zero Current Transformer).