Description
The M54128L/FP is a semiconductor integrated circuit having leakage detection and abnormal voltage detection functions for high-speed earth leakage interruption, and was developed for use in earth leakage breakers.

FEATUREs
• Lightning surge protection
   Two-count method adopted
   Improved dead-time performance for lightning impulses
• IEC support: 1.5 count method switching
• High input impedance
   Filter circuit can be configured using external capacitor, resistor
   Improved high-frequency, high harmonic superposition performance
• High input sensitivity: VT=6.5 Vrms
• Abnormal voltage detection (N open) function
   Neutral line open-phase protection in single-phase three-wire designs
   Function halt control (circuit current reduction)
• Low-voltage operation 7 to 12 V (versus 12 to 20 V in previous series)
   Standby: 820 µA standard (VS = 9 V, Ta = 25°C)
   SCR on: 740 µA standard (VS = 9 V, Ta = 25°C)
• Highly stable design
   Circuit designed for minimum characteristic fluctuation with changes in power supply voltage, ambient temperature

APPLICATIONs
• Earth leakage breaker