48.31.7.048.0050SPA Finder 1 CO Contacts DC Modular Interface Relay with Green LED + varistor Indication

Why Choose the Finder 48.31.7.048.0050SPA Modular Interface Relay?

The Finder 48.31.7.048.0050SPA is a compact modular interface relay designed to provide reliable electrical isolation between PLC control circuits and field devices in industrial automation systems. It features a single changeover contact (1 CO / SPDT) and a 48 V DC control coil, enabling dependable switching of loads from controllers, sensors and automation equipment. :contentReference[oaicite:0]{index=0}

This version includes an integrated green LED status indicator together with a varistor suppression circuit, allowing clear visual indication when the relay coil is energised while protecting control electronics from voltage spikes caused by coil switching. Designed as part of the Finder Series 48 relay interface modules, it is widely used in PLC interface assemblies and control cabinets. :contentReference[oaicite:1]{index=1}

The relay is typically installed with compatible Finder relay sockets on a 35 mm DIN rail, creating modular control interfaces that simplify wiring, maintenance and replacement in industrial panels. :contentReference[oaicite:2]{index=2}

Key Features

• 1 changeover contact (SPDT / 1 CO) for flexible control switching.
• 48 V DC coil voltage suitable for industrial control circuits.
• Integrated green LED indicator showing coil energised status.
• Built-in varistor suppression for protection against switching transients.
• Rated contact current up to 10 A for industrial loads.
• DIN rail mounting interface module for control cabinets.
• Compact 15.8 mm module width for high-density control panels.
• AgNi contact material for long electrical life and reliable switching.

Technical Specifications

• Manufacturer: Finder
• Series: 48 Series relay interface modules
• Model: 48.31.7.048.0050SPA
• Product type: Modular interface relay
• Contact configuration: 1 CO (SPDT)
• Rated contact current: 10 A
• Rated switching voltage: 250 V AC
• Maximum switching voltage: 400 V AC
• DC switching rating: 10 A at 30 V DC
• Coil voltage: 48 V DC
• Indicator: Green LED
• Coil suppression: Varistor
• Operate / release time: approx. 12 ms / 12 ms
• Contact material: Silver Nickel (AgNi)
• Mechanical life: approx. 10 × 10⁶ operations
• Electrical life: approx. 100 × 10³ operations at rated load
• Mounting: DIN rail interface module
• Terminal type: Screw terminals
• Protection rating: IP20
• Operating temperature: −40 °C to +70 °C
• Dimensions: approx. 78.6 × 15.8 × 75 mm

Typical Applications

• PLC output interface modules.
• Industrial automation control panels.
• Machine control and signal isolation.
• Building automation and HVAC control systems.
• Industrial process control equipment.

Trusted by Automation Engineers

Finder interface relays are widely used by panel builders and automation engineers worldwide for reliable signal isolation and control switching in industrial control cabinets.