55.34.8.240.5040 Finder Miniature plugin relay 4 pole 7A 240V

Why Choose the Finder 55.34.8.240.5040 Industrial Plug-In Relay?

The Finder 55.34.8.240.5040 is a versatile 7 A, four-pole industrial electromechanical relay designed for reliable switching in automation systems, machinery control panels and electrical equipment. Part of the established Finder 55 Series, this plug-in relay combines four changeover contacts (4 CO / 4PDT), a 240 V AC operating coil and gold-plated contact technology in a compact, serviceable design.

Featuring silver nickel contacts with 5 µm gold plating (AgNi + Au), the Finder 55.34.8.240.5040 is particularly suitable for control circuits where consistent electrical contact and low-level signal switching are important. Each changeover contact has a 7 A rated current at 250 V AC for compatible resistive loads, while the relay's 15 A maximum peak contact current provides additional short-duration switching capability under specified conditions.

The .5040 version combines gold-plated contacts with the lockable test button and mechanical indicator associated with Finder's 55 Series .0040/.5040 configurations. Its 14-pin plug-in connection is compatible with appropriately selected Finder 94 Series sockets, allowing convenient installation, testing and replacement. With a −40 to +85 °C operating temperature range and a nominal coil consumption of 1.5 VA, this relay is well suited to demanding industrial control environments.

Key Advantages

• Four changeover contacts (4PDT) enable simultaneous switching of four independent circuits.
• 240 V AC nominal coil for compatible industrial AC control supplies.
• 7 A rated contact current for suitably rated electrical loads.
• 5 µm gold-plated silver nickel contacts support dependable low-level signal switching.
• Lockable test button assists commissioning, testing and maintenance.
• Mechanical indicator provides visual confirmation of the relay's operating state.
• Plug-in construction allows straightforward replacement without desoldering.
• Finder 94 Series socket compatibility supports flexible panel and DIN rail installation.
• 250 V AC rated contact voltage for compatible industrial circuits.
• 1750 VA AC1 switching capacity for suitable resistive loads.
• −40 to +85 °C operating temperature range supports demanding equipment environments.
• Compact 20.7 mm width helps conserve space in control panels.

Key Features

• Finder 55 Series miniature general-purpose industrial relay.
• 55.34 four-pole plug-in relay platform.
• 240 V AC nominal coil voltage.
• 50/60 Hz AC coil operation.
• 4 CO / 4PDT / 4 Form C contact configuration.
• 7 A rated contact current.
• 15 A maximum peak contact current.
• 250 V AC rated switching voltage.
• 1750 VA AC1 switching capacity.
• AgNi + Au contact material with approximately 5 µm gold plating.
• 19.1 kΩ nominal coil resistance.
• 5.3 mA nominal coil current.
• 1.5 VA nominal coil consumption.
• 192 to 264 V AC specified coil operating voltage range.
• 9 ms typical operate time.
• 5 ms typical release time.
• Lockable test button and mechanical status indicator.
• 14-pin plug-in terminals.
• Compatible Finder 94.14 and 94.04 socket options.
• Monostable, non-latching electromagnetic operation.

Gold-Plated Four-Pole Switching with Convenient Testing and Maintenance

The Finder 55.34.8.240.5040 operates using a 240 V AC electromagnetic coil. When the coil is energised, its four changeover contacts transfer from their normally closed positions to their normally open positions. When coil power is removed, the contacts return to their normal states. This allows a single control signal to operate four separate electrical circuits, making the relay useful for coordinated switching, auxiliary control and equipment status functions.

The relay's 5 µm gold-plated AgNi contacts are particularly advantageous in low-level control and signal circuits. Gold plating helps reduce the influence of contact surface films, supporting reliable electrical continuity when switching comparatively small currents. For applications involving both low-level signals and higher-energy loads, designers should consider that electrical arcing can damage the gold layer and alter subsequent low-level switching performance.

The lockable test button and mechanical indicator simplify inspection and commissioning. The test button permits manual operation for appropriate maintenance procedures, while the indicator shows the relay's mechanical state. Because manual testing can change the state of connected circuits, the test button should only be used under safe, controlled conditions. The relay can be fitted into a compatible Finder 94 Series socket, making routine replacement easier than with a permanently soldered relay.

Typical Applications

• Industrial automation and machinery control panels.
• Four-circuit auxiliary switching systems.
• Electrical control cabinets using 240 V AC control supplies.
• Industrial monitoring and indication circuits.
• Low-level signal switching in compatible control equipment.
• Building management and facilities automation.
• Heating, ventilation and air conditioning control systems.
• Industrial alarm and signalling equipment.
• Electrical interlocking and auxiliary control functions.
• OEM machinery and electrical panel manufacturing.
• Serviceable DIN rail relay assemblies using compatible sockets.
• Replacement of compatible Finder 55.34 plug-in relays.