40.61.8.120.1000 Finder Miniature PCB relay 1pole 16A 120V

Why Choose the Finder 40.61.8.120.1000 Miniature Power Relay?

The Finder 40.61.8.120.1000 is a miniature electromechanical power relay from the Finder Series 40, designed for industrial automation, electrical control equipment and electronic switching applications. Featuring a 120 V AC operating coil, 16 A rated contact current and one changeover contact (1 CO / SPDT), this relay provides a practical interface between AC control circuits and compatible electrical loads.

Manufactured by Finder, the 40.61.8.120.1000 combines compact construction with dependable electromechanical switching. Its silver nickel (AgNi) contact material provides a cadmium-free contact solution for suitable industrial and commercial electrical applications. The changeover contact arrangement allows a common connection to switch between normally closed and normally open circuits.

The relay is designed for direct printed circuit board mounting or installation using a compatible Finder Series 95 socket. Its 5 mm contact pin pitch, compact housing and standard RT II flux-proof construction make it suitable for electronic equipment manufacturers, control panel builders and maintenance engineers requiring a miniature power relay with a 120 V AC coil.

Key Advantages

• 16 A rated contact current: Supports switching of compatible electrical loads in industrial and commercial control systems.
• 120 V AC operating coil: Suitable for control equipment designed around a 120 V AC supply.
• Single changeover contact: Provides normally open and normally closed switching functions within one compact relay.
• Silver nickel contacts: AgNi contact material offers a cadmium-free solution for appropriate switching applications.
• 250 V AC rated contact voltage: Supports compatible mains-voltage switching circuits.
• Compact Series 40 construction: Helps reduce the space required in electronic equipment and control assemblies.
• Direct PCB mounting: Allows integration into printed circuit board designs.
• Finder Series 95 socket compatibility: Provides installation and replacement flexibility when used with a suitable socket.
• Monostable operation: Returns the contacts to their normal position when the operating coil is de-energised.
• Electrical isolation: Separates the operating coil circuit from the switched contact circuit.
• RT II flux-proof protection: Supports appropriate PCB soldering processes.
• Established Finder relay platform: Suitable for industrial automation, equipment manufacture and maintenance applications.

Key Features

• Finder Series 40 miniature PCB/plug-in power relay.
• Type 40.61 single-pole electromechanical relay.
• 120 V AC nominal coil voltage.
• 50/60 Hz AC coil operation.
• Monostable, non-latching operating mechanism.
• One changeover contact (1 CO / SPDT).
• 16 A rated contact current.
• 250 V AC rated contact voltage.
• 400 V AC maximum switching voltage.
• Silver nickel (AgNi) contact material.
• Cadmium-free contact construction.
• Compact miniature relay housing.
• 5 mm contact pin pitch.
• Direct PCB or compatible Finder Series 95 socket mounting.
• RT II flux-proof environmental protection.
• 6 kV rated impulse withstand voltage between coil and contacts.
• Suitable for industrial control, automation and electrical switching equipment.

Reliable 120 V AC Control and Electromechanical Switching

The Finder 40.61.8.120.1000 provides a compact switching interface for equipment using a 120 V AC control supply. When the operating coil is energised, the relay's common contact transfers from the normally closed connection to the normally open connection. When coil power is removed, the internal spring mechanism returns the contact to its original position.

This monostable switching action is particularly useful in conventional control circuits where the output must follow the state of the operating supply. Typical functions include switching auxiliary circuits, controlling electrical loads, providing equipment status signals and interfacing between separate electrical circuits.

The relay features a 16 A rated contact current, allowing it to control compatible electrical loads within the manufacturer's specified limits. Load selection must account for the actual switching duty, particularly where motors, transformers, contactor coils, LED drivers or capacitive loads can generate significant inrush currents.

Its AgNi contact material provides a cadmium-free contact solution. Silver nickel contacts are used in a variety of general-purpose electromechanical switching applications, although the suitability of the relay for a particular load depends on current, voltage, switching frequency and electrical endurance requirements.

The 120 V AC coil is intended for equipment with an appropriately rated AC control circuit. It should not be connected directly to a 120 V DC supply or substituted for a relay with a different coil voltage. The control supply must remain within the specified operating range, and the installation must comply with the applicable electrical safety requirements.

The relay's 6 kV coil-to-contact impulse insulation and 8 mm clearance and creepage distance support electrical separation between the control and switched circuits. These characteristics are particularly useful in equipment where suitable insulation coordination is required.

For installation, the Finder Series 40 type 40.61 supports direct PCB mounting and compatible Finder Series 95 sockets. Socket selection must account for the relay's pin configuration and the socket's own electrical ratings. Where the relay is mounted directly onto a PCB, conductor dimensions, soldering procedures and electrical clearances must be appropriate for the intended load.

The standard RT II flux-proof construction helps protect the relay mechanism during suitable soldering processes. It should not be confused with RT III wash-tight construction, which is intended for different manufacturing conditions.

Typical Applications

• Industrial automation and electrical control equipment.
• Machinery control circuits using 120 V AC supplies.
• Electrical control panels and relay interface assemblies.
• Printed circuit board switching applications.
• Industrial process control and monitoring equipment.
• Building automation and electrical control systems.
• Auxiliary circuit switching and control signalling.
• Compatible lighting and electrical load control.
• OEM electronic equipment manufacturing.
• Equipment status indication and interlocking circuits.
• Control systems requiring normally open and normally closed contacts.
• Electrical maintenance and replacement applications.
• Compatible Finder Series 95 socket-based relay installations.