M54223

DESCRIPTION 

The UTC M54223 is a semiconductor integrated circuit with 

amplifier for a high-speed earth leakage circuit breaker. 

For the amplifying parts of earth leakage circuit breaker, the 

UTC M54223 consists of differential amplifier, latch circuit and 

voltage regulator. 

In normal operating, the UTC M54223 should be connected to 

the secondary side of the ZCT (zero current transformers). Here 

the ZCT detects leakage current different amplifiers’ both input. 

Then the signals which have been amplified are integrated by 

an external capacitor. The integrated signal connects to the input 

terminal whose output is suitable for the characteristics of highspeed earth leakage circuit breaker. 

UTC M54223 have not the latch circuit. When the leakage 

signal is released, the circuit is automatically reset. 

FEATURES 

* With good input sensitivity current temperature characteristics 

* High input sensitivity :VT=6.1mV (Typ.) 

* Only need low external component count 

* High noise and surge-proof 

* Low power dissipation :PD=5mW (Typ.) 

* May be used both as 100V and 200V. 

* Wide temperature range : from -20 °C to +80°C 

规格书M54223