Finder 55.34.8.230.0000T – 55 Series Miniature General Purpose Relays – Railway

Why Choose the Finder 55.34.8.230.0000T Industrial Plug-In Relay?

The Finder 55.34.8.230.0000T is a 7 A, four-pole electromechanical relay from the Finder 55 Series, designed for electrical switching in industrial automation, machinery control and railway-related equipment. Featuring four changeover contacts (4 CO / 4PDT), the relay provides flexible control of multiple circuits from a single operating coil.

Its 230 V AC nominal coil makes it suitable for compatible AC control supplies, while the four silver nickel (AgNi) changeover contacts provide a 7 A rated current per pole and a 250 V AC rated contact voltage. The relay is based on Finder's established 55.34 plug-in platform, offering convenient replacement and compatibility with appropriately selected Finder 94 Series sockets.

The T suffix identifies a special version associated with Finder's railway relay range. Finder documents 55.34T relays for applications involving vibration, shock and demanding transport environments. However, the precise combination 55.34.8.230.0000T has not been independently confirmed in an exact-part manufacturer datasheet; the railway-specific compliance and operating conditions of this 230 V AC variant should therefore be verified before use in a regulated railway installation.

Key Advantages

• Four changeover contacts provide versatile multi-circuit switching.
• 230 V AC nominal operating coil for compatible AC control circuits.
• 7 A contact rating for appropriately rated electrical loads.
• 250 V AC rated contact voltage for industrial switching applications.
• 1750 VA AC1 switching capacity for compatible resistive loads.
• Silver nickel (AgNi) contacts provide established general-purpose switching performance.
• Plug-in relay construction enables straightforward replacement during maintenance.
• Finder 94 Series socket compatibility supports flexible panel installation.
• Compact four-pole design helps conserve space in electrical assemblies.
• Monostable operation provides automatic return when coil power is removed.
• Industrial temperature capability supports use in demanding control environments, subject to variant-specific limits.
• Railway-oriented T-series designation makes it relevant for specialist transport equipment when the exact variant is approved.

Key Features

• Finder 55 Series miniature general-purpose relay.
• 55.34 four-pole plug-in relay platform.
• 230 V AC nominal coil voltage.
• 50/60 Hz AC coil operation.
• 4 CO / 4PDT contact configuration.
• 7 A rated contact current.
• 15 A maximum peak contact current for the standard 55.34 contact system.
• 250 V AC rated contact voltage.
• 1750 VA rated AC1 switching capacity.
• 350 VA AC15 switching capacity at 230 V AC.
• AgNi contact material.
• 17 kΩ nominal coil resistance for the standard 230 V AC version.
• 1.5 VA nominal AC coil consumption.
• 14-pin plug-in connection arrangement.
• Compatible with appropriately selected Finder 94 Series relay sockets.
• Suitable for socket-based panel or DIN rail installations.
• Non-latching electromagnetic switching mechanism.
• Four independent normally open/normally closed contact paths.
• Optional indication and suppression accessories available through compatible socket systems.
• Special T-version ordering designation.

Specification note: The electrical figures above are supported by published data for the standard Finder 55.34.8.230.0000 and the wider 55.34 relay platform. Exact T-suffix specifications, particularly railway compliance, temperature limits and approvals, require confirmation from Finder for part number 55.34.8.230.0000T.

Four-Pole Switching for Industrial and Transport Control Systems

The Finder 55.34.8.230.0000T uses a conventional electromagnetic switching mechanism. When the 230 V AC coil is energised, the relay changes the position of its four contact sets. Each pole provides a common terminal, a normally closed terminal and a normally open terminal. Removing the coil supply allows the contacts to return to their original positions.

This four-pole changeover arrangement is useful where one control command must operate several circuits simultaneously. For example, separate contacts can be allocated to equipment enable functions, auxiliary switching, indication and interlocking logic. Each contact must remain within its specified switching limits, with particular attention to inductive loads, inrush currents and the total thermal loading of the relay and socket.

Finder's 55.34T railway relay family is intended for specialist transport applications, including onboard lighting, air conditioning, auxiliary equipment and information systems. Published Finder railway documentation references EN 45545-2, EN 61373 and EN 50155 for specified 55.34T variants. These standards should not automatically be assumed to apply to the exact 230 V AC SKU without confirmation of its approved configuration.

Typical Applications

• Industrial automation and control panel assemblies.
• Four-circuit auxiliary switching systems.
• Machinery control and electrical interlocking.
• Industrial equipment using 230 V AC control supplies.
• Electrical monitoring and indication circuits.
• Building automation and facilities control.
• Heating, ventilation and air conditioning control equipment.
• Industrial alarm and signalling systems.
• OEM electrical equipment and panel manufacturing.
• Railway lighting and auxiliary equipment, subject to variant approval.
• Transport information and onboard control systems, where specified.
• Replacement of compatible Finder 55.34 plug-in relays.