D4140 Low power two-wire leakage protector control circuit
D4140 is a low power controller for leakage circuit breakers of AC socket appliances. These devices can detect dangerous earthed current paths, such as when a device falls into water. A circuit breaker breaks the line before a harmful or fatal shock can occur.
The D4140 has a built-in rectifier bridge, Zener regulator, operational amplifier, current reference, delay circuit, latch and thyristor driver.
A thyristor external relay, three capacitors and an external resistor are designed using the circuit architecture. Simple layout and minimum number of components ensure ease of application and long-term reliability.
D4140 takes the encapsulation form SOP8 and DIP8.
● High input sensitivity (typical VT=6.0mV)
Ac direct power supply
● Latch output direct drive thyristor
● Delay time adjustable
● Special for two wire system
● 110V and 220V AC power supply
● 350μ A Static current
Comply with UL943 standard
● Less external devices required