KA2803 Series

Earth Leakage Detector

Catalog

Earth Leakage Detector

Part	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type	Package / Case	Package / Case [y]	Package / Case [x]	Current - Supply	Supplier Device Package	Applications	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case	Package / Case
ON Semiconductor KA2803BDTF	12 V	20 V	Surface Mount	8-SOIC	3.9 mm	0.154 in	400 çA	8-SOIC	Earth Leakage Detector	-25 °C	80 C
ON Semiconductor KA2803BD	12 V	20 V	Surface Mount	8-SOIC	3.9 mm	0.154 in	400 çA	8-SOIC	Earth Leakage Detector	-25 °C	80 C
ON Semiconductor KA2803B	12 V	20 V	Through Hole	8-DIP			400 çA	8-DIP	Earth Leakage Detector	-25 °C	80 C	0.3 in	7.62 mm
ON Semiconductor KA2803CDTF	12 V	20 V	Surface Mount	8-SOIC	3.9 mm	0.154 in	400 çA	8-SOIC	Earth Leakage Detector	-25 °C	100 °C

Catalog

Earth Leakage Detector

Key Features

• Low power consumption: 5mW, 100V/200V

• Built-in voltage regulator

• High-gain differential amplifier

• 0.4mA output current pulse to trigger SCRs

• Low external part count

• High noise immunity, large surge margin

• Super temperature characteristic of input sensitivity

• Wide operating temperature range:TA= -25°C to +100°C

• Operation from 12V to 20V input

Description

The KA2803B is designed for use in earth leakage circuit interrupters, for operation directly off the AC line in breakers. The input of the differential amplifier is connected to the secondary coil of ZCT (Zero Current Transformer). The amplified output of differential amplifier is integrated at external capacitor to gain adequate time delay specified in KSC4613. The level comparator generates a high level when earth leakage current is greater than the fixed level.