Finder Solid State Relay 77B390248671, 40 A, 660 V AC, Instantaneous Switching, 24 V DC Control

The Finder 77B390248671 solid state relay switches up to 40 A at 660 V AC with instant response, eliminating the mechanical wear and contact bounce of electromechanical relays. Its zero-crossing-free instantaneous output suits precise load control in industrial heating, motor, and lighting circuits.

Highlights

• Rated load current: 40 A
• Maximum load voltage: 660 V AC
• Control voltage: 24 V DC
• Instantaneous switching type
• Panel mount with screw terminals
• Isolation voltage: 4000 V AC between input and output

In daily use

The relay accepts a 24 V DC control signal and draws approximately 10 mA, making it compatible with PLC outputs and industrial controllers. Its self-extinguishing plastic housing and IP20 rating suit installation inside control panels. The operating temperature range spans -20 °C to +80 °C, and the non-repetitive surge current reaches 400 A for 10 ms.

Full specifications

• Product type: Solid State Relay
• Series: Finder Series 77B
• Output configuration: 1 Normally Open (NO)
• Output type: AC
• Off-state leakage current: < 1 mA
• Input current: 10 mA (at 24 V DC)
• Mounting type: Panel Mount
• Terminal type: Screw Terminals
• Protection degree: IP20
• Housing material: Self-extinguishing plastic
• Operating temperature range: -20 to +80 °C
• Surge current (non-repetitive): 400 A (10 ms)

Final note

The Finder 77B390248671 provides reliable solid-state switching for demanding AC loads, with isolation and surge handling suited to industrial environments.