Finder 55.34.8.125.0040 – 55 Series Miniature General Purpose Relays

Why Choose the Finder 55.34.8.125.0040 Industrial Plug-In Relay?

The Finder 55.34.8.125.0040 is a versatile four-pole industrial electromechanical relay from the Finder Series 55 range, designed for industrial automation, machinery control, electrical panels and auxiliary switching applications. Featuring a 125 V AC operating coil and four changeover contacts (4 CO / 4PDT), this relay provides multiple independent switching paths controlled by a single electromagnetic coil.

Part of Finder's established Series 55 general-purpose relay family, the 55.34 is designed for plug-in socket mounting, enabling convenient installation and replacement within industrial control equipment. Its four changeover contacts allow designers to switch, signal or interlock several circuits simultaneously, making it useful in applications requiring multiple auxiliary contacts.

The 55.34.8.125.0040 is a practical solution for systems requiring an AC-operated, multi-contact relay with dependable electromechanical switching. Its compact construction and compatibility with suitable Finder relay sockets make it particularly useful for panel builders, OEM equipment manufacturers and maintenance engineers.

Key Advantages

• 125 V AC operating coil for compatible AC control circuits.
• Four changeover contacts provide flexible switching across multiple circuits.
• 4PDT contact configuration offers normally open and normally closed functions on each pole.
• Plug-in relay construction simplifies maintenance and replacement.
• Compact industrial design supports efficient use of control-panel space.
• Electromechanical operation provides physical contact switching between control and load circuits.
• Socket-mounting compatibility allows integration into DIN rail-mounted relay assemblies using suitable accessories.
• Multi-contact operation supports signalling, interlocking and auxiliary control functions.
• Suitable for industrial automation, machinery, building services and electrical control equipment.

Key Features

• Finder Series 55 industrial general-purpose relay.
• Finder Type 55.34 four-pole configuration.
• 125 V AC nominal coil voltage.
• AC electromagnetic coil operation.
• Four changeover contacts (4 CO).
• Four-pole double-throw (4PDT) switching arrangement.
• 7 A rated contact current for the standard 55.34 contact configuration.
• 250 V AC rated contact voltage.
• Independent common, normally open and normally closed connections for each pole.
• Plug-in terminals for compatible relay sockets.
• Monostable, non-latching operation.
• Suitable for auxiliary switching and industrial control applications.

Selection note: Confirm the socket type, coil supply tolerance, switching duty and any special features associated with the complete 55.34.8.125.0040 ordering code against the applicable Finder documentation before installation. Contact ratings must be applied according to the electrical load and utilisation category.

Reliable Four-Pole Switching for Industrial Control Systems

The Finder 55.34.8.125.0040 operates through an electromagnetic coil supplied at its nominal 125 V AC rating. When the coil is energised, the relay mechanism transfers each of the four common contacts from its normally closed position to its normally open position. When the supply is removed, the relay returns to its normal contact state.

The four changeover contact arrangement allows a single control signal to operate multiple circuits. This is useful for auxiliary signalling, equipment interlocking, status indication and coordinated switching functions within machinery and electrical control panels.

Its plug-in construction supports straightforward relay replacement when installed in a compatible socket. This reduces the need to disturb fixed panel wiring during routine servicing and helps simplify maintenance in industrial installations.

For reliable operation, the connected load must remain within the relay's applicable switching ratings. Inductive loads, motors, solenoids and contactor coils may require additional consideration of inrush current, electrical endurance and suppression of switching transients.

Typical Applications

• Industrial automation and machinery control.
• Electrical control panels and relay cabinets.
• Auxiliary control and signalling circuits.
• Electrical interlocking arrangements.
• Motor starter auxiliary control systems.
• Building management and HVAC control equipment.
• Industrial alarm and monitoring circuits.
• Equipment status indication.
• OEM machinery and control assemblies.
• Replacement relays in compatible industrial installations.