FUDAN MICRO VG54123A-SO-T-G

VG54123A is a high-performance dedicated IC for residual current devices (RCDs). It integrates a regulated power supply, amplifier circuit, comparator circuit, trip controller, and trip drive circuit. External components include a trip coil, varistor, Zener diode, diodes, resistors, and capacitors.

The VG54123A RCD dedicated IC is used to detect leakage signals on the line and neutral conductors. When a leakage signal is present, the zero current transformer (ZCT) detects the electrical signal, and its secondary winding output serves as the input to the RCD chip. The leakage signal is AC type. When the RMS value of the residual current exceeds the rated current (rms) specified for the RCD, the OS output pin of the RCD generates an action level with a pulse width greater than 20ms.

• AC powered
• Direct SCR drive; OS output pulse width >30ms upon leakage signal detection
• Suitable for detecting AC-type leakage signals
• Consistent trip accuracy across all leakage signal types
• Strong EMC immunity
• Compatible with 110V~220V (50~60Hz)
• Wide temperature range (Ta=-20~+80°C)