Relay BLOW 3026# (Finder F4.052.9.005) 8 A coil 5 V

The BLOW 3026# relay (compatible with Finder F4.052.9.005) is an electromechanical single-pole changeover device designed for control and switching tasks in automation, instrumentation and small electrical equipment. It features a 5 Vdc coil and contacts rated to switch currents up to 8 A, providing galvanic isolation between the coil and contact circuits. The relay is suitable for PCB mounting or for use with compatible sockets in modular systems where a low-voltage control signal drives a higher-current load.

Advantages

This relay offers reliable mechanical switching with clear electrical separation between control and load sides, reducing the risk of interference in sensitive circuits. The 5 V coil allows direct drive from common low-voltage control electronics, while the 8 A contact rating supports a range of small motors, lamps and resistive loads. Its compact form factor and compatibility with established socket formats simplify integration into existing designs and maintenance operations.

Suitable for

• Industrial and building automation control circuits
• Signal and instrumentation switching
• Control boards and PCB-mounted relay sockets
• Small motor and lamp switching within the 8 A limit
• Prototyping and repair of low-voltage control systems

Key specifications

• Coil voltage: 5 V DC
• Contact configuration: single-pole changeover (SPDT)
• Maximum switching current: 8 A
• Contact type: electromechanical silver-alloy or equivalent contacts for general-purpose loads
• Mounting options: PCB mounting or compatible socket mounting
• Galvanic isolation: coil to contact isolation provides separation of control and load circuits

How to use

Mount the relay on the printed circuit board or insert it into an appropriate socket, ensuring correct pin alignment and secure electrical connections. Drive the 5 V coil with a suitable low-voltage control source; include a flyback diode or other suppression device if the coil is driven by DC switching transistors to protect the driver from inductive voltage spikes. Ensure the switched load does not exceed the 8 A rating and that contact material and load type are compatible with electromechanical relay operation.

Usage recommendations

For dependable operation, verify coil voltage and contact current requirements in your circuit, provide adequate heat dissipation and avoid switching highly inductive loads without appropriate suppression. For long service life in frequent-switching applications, consider relay derating and periodic inspection of contact condition.