55.34.9.048.2040 Finder Miniature plugin relay 4 pole 7A DC 48V

Why Choose the Finder 55.34.9.048.2040 Industrial Relay?

The Finder 55.34.9.048.2040 is a versatile 7 A, 48 V DC plug-in industrial relay designed for reliable electrical switching in industrial automation, machinery control and electrical control panels. Part of the Finder Series 55 miniature general-purpose relay range, it combines four independent changeover contacts with convenient socket mounting and practical manual testing features.

Featuring a four-pole double-throw (4PDT, 4 CO) contact configuration, the Finder 55.34.9.048.2040 enables four separate electrical circuits to be switched using a single electromagnetic coil. Its 48 V DC nominal coil voltage makes it suitable for compatible DC control systems, while its 7 A rated contacts support a range of industrial switching applications.

This variant features silver cadmium oxide (AgCdO) contacts, a lockable manual test button and a mechanical status indicator. The test button allows convenient manual operation during commissioning and maintenance, while the mechanical indicator provides visual feedback of the relay's operating state. Its plug-in construction is designed for compatible Finder Series 94 relay sockets, making it particularly suitable for serviceable industrial control installations.

Key Advantages

• Four changeover contacts (4PDT, 4 CO) provide flexible switching of four independent electrical circuits.
• 48 V DC nominal coil voltage supports compatible industrial DC control systems.
• 7 A rated contact current provides dependable switching for general-purpose industrial loads.
• Silver cadmium oxide (AgCdO) contacts offer a robust contact system for electrical switching applications.
• Lockable manual test button enables convenient functional checks during commissioning and maintenance.
• Mechanical status indicator provides visual confirmation of relay actuation.
• Plug-in socket mounting allows straightforward replacement without disturbing fixed wiring.
• Compatible with suitable Finder Series 94 sockets, including DIN rail mounting options.
• Monostable operation returns the contacts to their normal positions when coil power is removed, provided the test button is not mechanically locked.
• Compact construction helps conserve space in electrical control panels and industrial equipment.

Key Features

• Finder Series 55 miniature general-purpose industrial relay.
• Type 55.34 with four changeover contacts.
• 48 V DC nominal coil voltage.
• 4PDT (4 CO, 4 Form C) contact configuration.
• 7 A rated contact current.
• 250 V AC rated contact voltage.
• 1,750 VA rated AC1 switching load.
• 2.4 kΩ nominal coil resistance.
• 20 mA nominal coil current.
• Approximately 0.96 W nominal DC coil consumption.
• Silver cadmium oxide (AgCdO) contact material.
• Lockable manual test button for commissioning and functional testing.
• Mechanical status indicator for visual confirmation of relay operation.
• Monostable, non-latching electromagnetic operation.
• Plug-in terminals for compatible Finder Series 94 relay sockets.
• Suitable for industrial automation, electrical interlocking and multi-circuit switching.

Reliable Four-Pole Switching with Manual Testing and Status Indication

Electromechanical relays such as the Finder Series 55 use an electromagnetic coil to operate mechanically linked electrical contacts. When the coil is energised, all four changeover contacts transfer from their normally closed positions to their normally open positions. When the coil supply is removed, the contacts return to their original positions during normal operation. This enables a single control signal to operate four separate electrical circuits while maintaining galvanic isolation between the coil and contact systems.

The Finder 55.34.9.048.2040 is particularly useful in industrial installations requiring multiple switching functions from a single relay. Its 4PDT contact arrangement supports auxiliary control, status signalling, electrical interlocking and equipment switching, while the 48 V DC coil allows operation from an appropriately rated DC control supply.

A distinguishing feature of the 2040 variant is its lockable test button and mechanical indicator. The test button allows maintenance engineers to actuate the contacts manually during functional testing, while the indicator provides visual feedback of the relay's mechanical position. As locking the test button can hold the contacts in an actuated state independently of coil power, testing should be performed only under appropriate electrical safety procedures. The plug-in design also simplifies relay replacement when used with a compatible Finder Series 94 socket.

Typical Applications

• Industrial automation and process control systems.
• Electrical control panels and relay interface assemblies.
• 48 V DC industrial control circuits.
• PLC-controlled auxiliary switching applications.
• Industrial machinery and OEM electrical equipment.
• Building automation and building management systems.
• Electrical interlocking and multi-circuit control.
• Control circuit testing, commissioning and maintenance.
• Electrical status signalling and auxiliary control.
• Maintenance-friendly plug-in relay installations.