50.12.9.110.5000 Finder Safety relay 2pole 8A DC 110V

Why Choose the Finder 50.12.9.110.5000 Force-Guided Safety Relay?

The Finder 50.12.9.110.5000 is a high-performance 8 A force-guided electromechanical relay designed for industrial control, machinery monitoring and safety-related switching applications. Part of the Finder 50 Series, this compact PCB-mounted relay combines a 110 V DC coil, two changeover contacts and mechanically linked contact operation in a robust industrial component.

Featuring a double-pole double-throw (DPDT / 2 CO) contact configuration, the Finder 50.12.9.110.5000 provides two changeover contact sets for appropriately designed control and monitoring circuits. Its force-guided contact mechanism is particularly valuable in applications where the relationship between normally open and normally closed contact positions must remain mechanically constrained, including safety monitoring and fault-detection systems.

The relay incorporates silver nickel contacts with gold plating (AgNi + Au), a 700 mW nominal DC coil and 6 kV coil-to-contact impulse withstand insulation. With compact dimensions of approximately 29 × 12.4 × 25 mm, through-hole PCB mounting and an operating temperature range of −40 to +70 °C, it offers a practical solution for OEM manufacturers, automation engineers and designers of industrial control equipment.

Key Advantages

• Force-guided contact mechanism supports safety-related monitoring and fault-detection applications.
• 110 V DC nominal coil for compatible industrial DC control systems.
• Two changeover contacts (DPDT / 2 CO) provide flexible switching and monitoring arrangements.
• 8 A rated contact current for appropriately rated electrical loads.
• Gold-plated silver nickel contacts provide suitable contact characteristics for industrial control circuits.
• 700 mW nominal coil consumption supports efficient DC control operation.
• 6 kV coil-to-contact impulse withstand voltage provides robust electrical insulation.
• PCB through-hole mounting simplifies integration into electronic control assemblies.
• Compact 12.4 mm housing width helps conserve PCB space.
• −40 to +70 °C operating temperature range supports demanding industrial environments.
• Fast electromechanical switching with approximately 10 ms operate time.
• Flux-protected construction supports compatible PCB soldering processes.
• Suitable for machinery safety interfaces, auxiliary monitoring and industrial automation.

Key Features

• Finder 50 Series force-guided relay.
• Type 50.12 PCB-mounted relay.
• 110 V DC nominal coil voltage.
• DPDT / 2 CO contact configuration.
• Two mechanically linked changeover contact sets.
• 8 A rated contact current.
• 250 V AC resistive contact rating.
• 400 V AC maximum switching voltage.
• 220 V DC maximum switching voltage, subject to the DC load characteristic.
• Silver nickel contacts with gold plating (AgNi + Au).
• 17.25 kΩ nominal coil resistance.
• Approximately 6.4 mA nominal coil current.
• Approximately 700 mW nominal coil consumption.
• 82.5 V DC specified must-operate voltage.
• 11 V DC specified must-release voltage.
• 10 ms typical operate time.
• 4 ms typical release time.
• 6 kV coil-to-contact impulse withstand voltage.
• PCB solder-pin connections.
• 5 mm terminal pitch.
• −40 to +70 °C operating temperature range.
• 29 × 12.4 × 25 mm compact housing.

Force-Guided Contacts for Safety-Related Control Systems

A distinguishing feature of the Finder 50.12.9.110.5000 is its force-guided contact construction. Unlike conventional general-purpose relays, force-guided relays use a mechanical arrangement that constrains the relative movement of normally open and normally closed contacts. This arrangement can support the detection of certain contact faults when the relay is incorporated into a properly designed monitoring circuit.

The relay provides two changeover contact sets, allowing control and feedback functions to be incorporated into the same compact component. In a suitable safety-related design, these contacts may be used as part of a monitoring strategy intended to identify abnormal switching conditions. However, the relay itself is not a complete safety controller; the required safety performance depends on the overall circuit architecture, diagnostics, protective measures and applicable machinery safety standards.

For applications requiring functional safety, designers should assess the complete system against relevant requirements and verify the manufacturer's current contact-guidance and approval documentation for the exact part number.

Efficient 110 V DC Operation and Compact PCB Integration

The 110 V DC electromagnetic coil allows the Finder 50.12.9.110.5000 to be operated from compatible DC control circuits. With a nominal resistance of 17.25 kΩ and power consumption of approximately 700 mW, the coil provides a practical balance between operating power and electromechanical switching performance.

When the coil is energised, the relay transfers its changeover contacts from their normal positions. Removing the coil voltage allows the contacts to return to their de-energised positions. The specified 10 ms operate time and 4 ms release time make it suitable for appropriately designed industrial control and monitoring functions.

The PCB through-hole construction, 5 mm terminal pitch and compact 29 × 12.4 × 25 mm housing support integration into dedicated electronic assemblies. Engineers should follow the manufacturer's PCB footprint, soldering guidance and recommended coil suppression practices when designing the surrounding circuitry.

Typical Applications

• Safety-related industrial control circuits.
• Machinery monitoring and diagnostic systems.
• Emergency-stop monitoring interfaces within suitable safety architectures.
• Industrial automation and machine control equipment.
• Lift and escalator control assemblies.
• Hoists, cranes and lifting equipment.
• Warehouse automation and material handling systems.
• Woodworking and industrial processing machinery.
• Medical and dental equipment control circuits.
• Electrical interlocking and auxiliary monitoring.
• PCB-based industrial control modules.
• OEM safety-related electronic assemblies.
• Industrial switching systems requiring mechanically guided contacts.
• Equipment requiring compact, dual-changeover relay operation.