Finder 50.14.9.012.4220 – 50 Series Relays with forcibly guided contacts

Why Choose the Finder 50.14.9.012.4220 Force-Guided Safety Relay?

The Finder 50.14.9.012.4220 is a high-quality 8 A, four-pole force-guided electromechanical relay designed for industrial machinery, safety-related control circuits and equipment monitoring applications. Part of the established Finder 50 Series, this compact PCB-mounted relay combines a 12 V DC coil, four mechanically linked contacts and robust electrical insulation in a space-efficient industrial component.

Featuring a 2 normally open (2 NO) and 2 normally closed (2 NC) contact configuration, the Finder 50.14.9.012.4220 provides separate switching and monitoring contacts with a mechanically constrained operating relationship. Its force-guided contact construction, Type A according to EN 61810-3, makes it particularly suitable for safety-related applications where contact-state monitoring and fault detection are important.

This model incorporates silver tin oxide (AgSnO₂) contacts, a 0.8 W DC coil and 6 kV coil-to-contact impulse withstand insulation. Its compact 40 × 13 × 16.5 mm housing, through-hole PCB terminals and RT III wash-tight construction make it a practical choice for automation engineers, OEM equipment designers and manufacturers of industrial safety-related control systems.

Key Advantages

• Force-guided contacts according to EN 61810-3, Type A support contact monitoring and fault detection in appropriately designed safety circuits.
• 12 V DC nominal coil for compatible low-voltage DC control systems.
• Four-pole contact arrangement provides two normally open and two normally closed contacts.
• 8 A rated contact current for suitably rated industrial switching applications.
• Silver tin oxide (AgSnO₂) contacts provide dependable switching characteristics for industrial electrical loads.
• 800 mW coil consumption supports efficient DC-operated relay control.
• 6 kV coil-to-contact impulse withstand voltage supports robust electrical insulation.
• 8 mm coil-to-contact insulation separation helps maintain separation between the coil and switched circuits.
• PCB through-hole mounting enables direct integration into electronic control assemblies.
• Compact 13 mm housing width helps conserve space on printed circuit boards.
• RT III wash-tight environmental protection supports compatible PCB manufacturing and cleaning processes.
• −40 to +70 °C operating temperature range supports demanding industrial environments.
• Cadmium-free contact materials support modern electrical equipment design requirements.
• Monostable operation returns the contacts to their normal positions when coil power is removed.

Key Features

• Finder 50 Series force-guided relay.
• Type 50.14 four-pole safety-related relay.
• 12 V DC nominal coil voltage.
• 2 NO + 2 NC contact configuration.
• Four mechanically force-guided contacts.
• 8 A rated contact current.
• 250 V AC rated contact voltage.
• 400 V AC maximum switching voltage.
• 220 V DC maximum switching voltage, subject to the DC switching characteristic.
• Silver tin oxide (AgSnO₂) contact material.
• 180 Ω nominal coil resistance.
• Approximately 66.7 mA nominal coil current.
• 0.8 W nominal coil consumption.
• 10 ms typical operate time.
• 4 ms typical release time.
• 6 kV coil-to-contact impulse withstand voltage.
• 8 mm coil-to-contact insulation separation.
• PCB through-hole solder-pin mounting.
• 5 mm terminal pitch.
• RT III wash-tight construction.
• −40 to +70 °C operating ambient temperature.
• 40 × 13 × 16.5 mm housing dimensions.
• EN 61810-3 Type A force-guided contact design.

Force-Guided Contact Technology for Safety-Related Control

The Finder 50.14.9.012.4220 incorporates a force-guided contact mechanism designed to maintain a defined mechanical relationship between its normally open and normally closed contacts. This is an important feature in safety-related control systems because it can support the detection of certain contact failures, including specified welded-contact conditions.

Its 2 NO + 2 NC contact arrangement provides four separate contact paths rather than two changeover contacts. The normally open contacts can be used for appropriately rated switching functions, while the normally closed contacts can support monitoring or feedback arrangements in a suitably designed circuit.

The relay's Type A force-guided contact design according to EN 61810-3 is particularly relevant where a safety system needs to monitor whether contact operation has occurred as expected. However, the relay is not a complete safety controller. The achieved safety performance depends on the complete electrical architecture, diagnostic coverage, component ratings and system validation.

Compact PCB Relay with Efficient 12 V DC Coil Operation

The 12 V DC coil provides an accessible control voltage for industrial electronic equipment. With a nominal resistance of 180 Ω, the relay draws approximately 66.7 mA at its rated voltage, corresponding to a nominal coil power of 0.8 W.

When the coil is energised, the two normally open contacts close and the two normally closed contacts open. When the control voltage is removed, the relay returns to its normal contact positions. Its typical 10 ms operate time and 4 ms release time support appropriately designed control and monitoring functions.

The 40 × 13 × 16.5 mm housing and PCB through-hole terminals allow the relay to be integrated into dedicated electronic assemblies. Its RT III wash-tight construction provides protection suitable for specified manufacturing processes, while the 6 kV coil-to-contact impulse withstand voltage contributes to the relay's robust insulation design.

Designers should follow Finder's recommended PCB footprint, terminal arrangement, soldering requirements and coil suppression guidance. External suppression components may affect the relay's release time and should be considered when timing is important to the application.

Typical Applications

• Safety-related industrial control circuits.
• Machinery monitoring and fault-detection systems.
• Emergency-stop monitoring interfaces within validated safety architectures.
• Industrial automation and machine control equipment.
• Safety-related contact feedback circuits.
• Lift and escalator control assemblies.
• Hoists, cranes and lifting machinery.
• Warehouse automation and material handling equipment.
• Industrial processing and manufacturing machinery.
• Electrical interlocking and monitoring systems.
• PCB-based industrial safety modules.
• OEM electronic control assemblies.
• Equipment requiring mechanically force-guided contacts.
• Industrial systems using 12 V DC relay control.