Why Choose the Finder 97.P2.7SMA Railway Relay Socket?
The Finder 97.P2.7SMA is a specialist 8-position push-in relay socket designed for the Finder 46.52T railway relay. Part of the Finder 97 Series, it provides a reliable connection interface for electrical control, signalling and auxiliary switching applications in railway equipment and other demanding industrial environments.
Rated at 8 A and 250 V AC, the Finder 97.P2.7SMA uses screwless push-in spring terminals to simplify conductor installation. Its eight-terminal arrangement supports the two changeover contacts and coil connections of the compatible Finder 46.52T relay, making it suitable for applications requiring two independently wired switching circuits operated by a common relay coil.
The socket supports 35 mm DIN rail or panel mounting and is supplied with a Finder 097.71 metal retaining clip. This clip helps secure the installed relay in equipment exposed to mechanical movement and vibration, while the plug-in arrangement allows straightforward relay replacement during planned maintenance.
Designed for railway applications, the Finder 97.P2.7SMA meets relevant requirements of EN 45545-2, EN 61373 and EN 50155. With IP20 protection, a -40 to +70 °C operating temperature range and compatibility with selected Finder accessories, it offers a practical connection solution for railway control equipment, rolling stock systems and industrial automation panels.
Key Advantages
- Railway-oriented relay socket designed for compatible Finder 46.52T relays.
- 8-position connection arrangement supports two changeover contacts and relay coil connections.
- 8 A nominal current rating for suitable control and auxiliary switching circuits.
- 250 V AC nominal voltage rating.
- Push-in spring terminals enable convenient screwless conductor termination.
- Metal retaining clip included to help maintain secure relay positioning.
- 35 mm DIN rail or panel mounting provides installation flexibility.
- EN 45545-2 compliance addresses railway fire protection requirements for materials.
- EN 61373 compliance addresses railway shock and vibration requirements.
- EN 50155 compliance addresses specified railway environmental requirements.
- IP20 protection rating for installation within suitable electrical enclosures.
- -40 to +70 °C operating temperature range supports demanding environments.
- Plug-in relay replacement helps simplify maintenance without disturbing permanent wiring.
Key Features
- Finder 97 Series relay socket.
- Model 97.P2.7SMA.
- 8-position relay connection interface.
- Designed for Finder 46.52T railway relays.
- Two-changeover contact arrangement with the compatible relay.
- 8 A rated current.
- 250 V AC rated voltage.
- Screwless push-in spring terminals.
- 35 mm DIN rail mounting to EN 60715.
- Panel mounting capability.
- Finder 097.71 metal retaining clip supplied with the SMA version.
- IP20 protection category.
- 6 kV impulse dielectric strength between coil and contacts under specified test conditions.
- -40 to +70 °C ambient operating temperature.
- 8 mm conductor stripping length.
- Compatible with selected Finder 097.52 and 097.42 jumper links.
- Compatible with Finder 86.30T timing accessories in suitable configurations.
- Railway fire, vibration and environmental compliance for specified installation conditions.
Technical Specifications
- Manufacturer: Finder
- Series: 97 Series
- Model: 97.P2.7SMA
- Alternative part number formatting: 97.P2.7 SMA
- Product type: Railway and industrial plug-in relay socket
- Socket configuration: 8 positions
- Compatible relay: Finder 46.52T
- Compatible relay series: Finder 46 Series railway relays
- Compatible contact arrangement: 2 changeover contacts (2 CO)
- Rated current: 8 A
- Rated voltage: 250 V AC
- Terminal type: Push-in spring terminals
- Connection method: Screwless push-in connection
- Mounting type: DIN rail or panel mounting
- DIN rail size: 35 mm
- DIN rail standard: EN 60715
- Protection category: IP20
- Ambient operating temperature: -40 to +70 °C
- Impulse dielectric strength between coil and contacts: 6 kV (1.2/50 µs)
- Conductor stripping length: 8 mm
- Minimum solid conductor cross-section: 0.5 mm²
- Minimum stranded conductor cross-section: 0.5 mm²
- Maximum solid conductor capacity: 1 × 2.5 mm² or 2 × 1.5 mm²
- Maximum stranded conductor capacity: 1 × 2.5 mm² or 2 × 1.5 mm²
- Relay retention: Metal retaining clip
- Included retaining clip: Finder 097.71
- Compatible jumper accessories: Finder 097.52 and 097.42, 2-way
- Compatible timer accessory: Finder 86.30T
- Railway fire protection standard: EN 45545-2:2020
- Railway vibration and shock standard: EN 61373, Category 1, Class B
- Railway environmental standard: EN 50155, OT4/ST1 classification
- Relay coil voltage: Determined by the installed Finder 46.52T relay
- Relay supplied: No; compatible relay selected separately
Reliable Railway Relay Connections for Vibration-Prone Control Equipment
The Finder 97.P2.7SMA provides a dedicated connection interface for the Finder 46.52T railway relay. Its eight-position arrangement accommodates the relay coil and two changeover contact sets. Each contact set has common, normally open and normally closed connections, enabling two separate circuits to change state when the relay coil is energised.
This arrangement is particularly useful in railway control and auxiliary signalling systems where multiple electrical functions must respond to a common control signal. For example, a suitable relay assembly can be used to switch one auxiliary circuit while providing a corresponding status signal through the second contact set. The actual switching capacity and operating voltage depend on the installed relay and the characteristics of the connected loads.
The push-in terminal technology helps simplify installation during railway equipment manufacturing and maintenance. Appropriately prepared conductors can be inserted into the spring terminals without conventional screw tightening. Finder specifies an 8 mm stripping length and conductor capacities up to 2.5 mm² for a single conductor, subject to the stated wiring configuration.
Railway installations can expose electrical components to vibration, mechanical shock and varying environmental conditions. The metal retaining clip helps keep the compatible relay seated in the socket, while the product's specified compliance with EN 61373 and EN 50155 supports its use in appropriately designed railway electrical equipment. Compliance of the complete equipment assembly must still be assessed against the relevant application requirements.
For additional functionality, compatible Finder 86.30T timer modules can be used in suitable relay configurations. Selected 097.52 and 097.42 jumper links can also simplify common electrical connections between appropriate sockets. The circuit must be safely isolated before relay replacement, accessory installation or maintenance.
Typical Applications
- Railway rolling stock electrical control panels.
- Train auxiliary control and signalling circuits.
- Railway equipment interface assemblies.
- Control systems exposed to vibration and mechanical shock.
- Two-changeover relay switching applications.
- Railway vehicle monitoring and status indication.
- Industrial automation and machinery control.
- Electrical interlocking and auxiliary control circuits.
- OEM railway electrical equipment manufacturing.
- Maintenance of compatible Finder 46.52T relay installations.
