Finder 50.12.9.006.1000 – 50 Series Relays with forcibly guided contacts

Why Choose the Finder 50.12.9.006.1000 Force-Guided Safety Relay?

The Finder 50.12.9.006.1000 is a compact 8 A force-guided electromechanical relay designed for printed circuit board integration in industrial control, monitoring and safety-related applications. Part of the Finder 50 Series, this specialist PCB relay features mechanically linked contacts manufactured in accordance with EN 61810-3 Type B, previously EN 50205, providing defined contact behaviour that can be used in appropriately designed monitoring and diagnostic circuits.

Featuring a 6 V DC nominal operating coil and two changeover contacts (2 CO / DPDT), the Finder 50.12.9.006.1000 provides flexible electrical switching in a compact PCB-mounted package. Its 8 A rated contact current, silver nickel (AgNi) contacts and 50 Ω nominal coil resistance make it suitable for compatible industrial and electronic control circuits where reliable contact operation and defined switching behaviour are important.

Unlike a conventional general-purpose relay, the Finder 50.12 uses a force-guided contact mechanism intended to prevent specified normally open and normally closed contacts from being closed simultaneously under defined fault conditions. The relay also provides 8 mm coil-to-contact insulation separation, 6 kV impulse withstand capability and RT II flux-proof construction. Its compact dimensions of approximately 29 × 12.4 × 25 mm make it particularly suitable for densely populated industrial control PCBs.

Key Advantages

• Force-guided contact construction designed for monitoring and safety-related control circuits.
• EN 61810-3 Type B contact arrangement supports defined mechanical contact behaviour.
• 6 V DC nominal coil for compatible low-voltage electronic control systems.
• Two changeover contacts (DPDT) provide flexible switching and feedback possibilities.
• 8 A contact rating for suitably rated electrical loads.
• Silver nickel (AgNi) contacts offer dependable general-purpose switching characteristics.
• PCB through-hole mounting allows direct integration into electronic assemblies.
• 5 mm contact pin pitch supports compact PCB layouts.
• 6 kV coil-to-contact impulse insulation supports electrical separation.
• RT II flux-proof enclosure supports conventional PCB soldering processes.
• Compact 12.4 mm housing width helps conserve circuit board space.
• Suitable for industrial monitoring, control equipment and appropriately engineered safety circuits.

Key Features

• Finder 50 Series force-guided PCB relay.
• 50.12 two-pole relay platform.
• 6 V DC nominal operating coil.
• 2 CO (DPDT / 2 Form C) contact configuration.
• 8 A rated contact current.
• Silver nickel (AgNi) contact material.
• EN 61810-3 Type B force-guided contacts.
• 50 Ω nominal coil resistance.
• 0.7 W nominal coil consumption.
• 4.5 V DC minimum operating voltage under specified conditions.
• 7.2 V DC maximum coil voltage under specified conditions.
• 6 kV coil-to-contact impulse withstand voltage.
• 8 mm coil-to-contact insulation separation.
• RT II flux-proof construction.
• Through-hole PCB solder terminals.
• 5 mm contact pin pitch.
• Approximately 29 × 12.4 × 25 mm housing dimensions.
• −40 to +70 °C operating temperature range.
• Monostable electromagnetic relay operation.
• Suitable for contact monitoring and fault-detection circuit designs.

Force-Guided Contacts for Safety Monitoring and Fault Detection

The distinguishing feature of the Finder 50.12.9.006.1000 is its force-guided contact mechanism. In an ordinary relay, normally open and normally closed contacts may not have a defined relationship after certain mechanical failures. Force-guided relays use mechanically linked contact elements so that, under the conditions defined by the relevant standard, a welded contact prevents the corresponding monitored contact from returning to an apparently normal state.

The Type B contact arrangement requires particular care when designing safety-monitoring circuits. Although the relay has two changeover contacts, the standard's force-guided relationship applies to specified normally open and normally closed contact combinations, rather than treating every possible contact pairing as an independent safety-rated combination. Circuit designers should use the manufacturer's approved contact combinations and PCB terminal diagram when implementing feedback monitoring.

When the 6 V DC coil is energised, the relay changes the state of its contacts; removing the coil supply allows the mechanism to return to its rest position. The relay's 8 mm insulation separation, 6 kV impulse withstand rating and compact PCB footprint support integration into industrial electronic equipment. A force-guided relay is a component of a safety-related system, not a complete safety function by itself; the required safety integrity or performance level must be established for the finished circuit.

Typical Applications

• Safety-related industrial control circuit assemblies.
• Relay contact monitoring and diagnostic circuits.
• Industrial machinery control electronics.
• Emergency-stop monitoring equipment when incorporated into a suitably designed safety system.
• Safety interlock monitoring circuits.
• Industrial automation printed circuit boards.
• Electrical control and supervision equipment.
• Fault-detection and contact feedback systems.
• Low-voltage DC electronic control interfaces.
• OEM safety and control module manufacturing.
• Industrial monitoring and alarm equipment.
• Replacement of compatible Finder 50 Series PCB relays.