Why Choose the Finder 50.12.9.005.5000 5 V DC 8 A Force-Guided Safety Relay?
The Finder 50.12.9.005.5000 is a compact PCB-mounted electromechanical safety relay from the Finder Series 50 range, featuring forcibly guided contacts designed for safety-related monitoring and control applications. With a 5 V DC operating coil, two 8 A changeover contacts and gold-plated silver-nickel contact material, this relay provides dependable switching in industrial automation, machinery safety circuits and electronic control equipment.
A defining characteristic of the Finder 50.12 is its forcibly guided contact system in accordance with EN 61810-3 Type B, formerly referenced as EN 50205. This mechanically linked contact arrangement enables appropriately selected normally open and normally closed contacts to be used for contact-state monitoring and fault detection. It is particularly valuable in safety-related control architectures where feedback on contact operation is required.
The 50.12.9.005.5000 features silver-nickel contacts with gold plating (AgNi + Au), supporting reliable operation in suitable low-level switching circuits. Its compact 29 × 12.4 × 25 mm housing, through-hole PCB terminals, reinforced coil-to-contact insulation and flux-proof construction make it a practical component for integration into industrial electronic equipment.
Key Advantages
- Forcibly guided contacts support safety-related contact monitoring and fault-detection circuit designs.
- EN 61810-3 Type B contact construction provides mechanically linked contact operation for appropriately selected NO and NC contacts.
- 5 V DC operating coil is suitable for compatible low-voltage electronic control systems.
- Two 8 A changeover contacts provide flexible switching and monitoring functions.
- Gold-plated silver-nickel contacts support reliable low-level signal switching.
- 6 kV coil-to-contact impulse withstand capability supports electrical separation between control and switched circuits.
- 8 mm coil-to-contact separation contributes to the relay's insulation performance.
- Compact PCB mounting design allows integration into space-constrained electronic assemblies.
- 700 mW nominal coil consumption supports efficient low-voltage relay control.
- RT II flux-proof construction supports suitable PCB assembly processes.
- Operating temperature range of -40 °C to +70 °C supports industrial environmental conditions.
Key Features
- Finder Series 50 forcibly guided contact relay.
- Finder Type 50.12 with two changeover contacts.
- 5 V DC nominal coil voltage.
- 3.8–6 V DC coil operating range.
- 35 Ω nominal coil resistance.
- 143 mA nominal coil current.
- 700 mW nominal coil power consumption.
- 2 CO / DPDT contact configuration.
- 8 A rated contact current.
- 15 A maximum peak contact current.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage.
- 2,000 VA rated resistive switching capacity (AC1).
- Silver-nickel contacts with gold plating (AgNi + Au).
- Forcibly guided contact construction, EN 61810-3 Type B.
- 6 kV impulse insulation between coil and contacts.
- 5 mm PCB terminal pitch.
- Through-hole PCB mounting with solder terminals.
- Flux-proof RT II environmental protection.
- Monostable, non-latching electromechanical operation.
Reliable Force-Guided Switching for Safety-Related Control Systems
The Finder 50.12.9.005.5000 uses a 5 V DC electromagnetic coil to operate two mechanically linked changeover contact sets. When the coil is energised, the contact mechanism transfers the common connections from their normally closed positions to their normally open positions. When the coil is de-energised, the contacts return to their normal positions.
Unlike conventional general-purpose relays, the Finder 50.12 incorporates forcibly guided contact construction. In an appropriately designed monitoring circuit, the mechanical relationship between selected normally open and normally closed contacts helps identify certain contact faults, including welded-contact conditions. For the Type B configuration, only the manufacturer-specified NO and NC contact combinations are treated as forcibly guided; the entire DPDT contact arrangement must not automatically be assumed to provide two independent safety feedback channels.
The relay's gold-plated AgNi contacts make it suitable for consideration in circuits where low-level switching reliability is important. Its 8 A rated contact current also supports appropriately rated switching duties, although contact behaviour and gold-plating characteristics should be considered when moving between low-level and higher-current applications.
The 6 kV coil-to-contact impulse withstand rating, compact PCB construction and RT II flux-proof protection support integration into industrial control electronics. However, a forcibly guided relay is a component rather than a complete safety controller. The required safety integrity or performance level must be established through the design, diagnostics, redundancy and validation of the complete safety-related control system.
Typical Applications
- Safety-related industrial control circuits.
- Emergency-stop monitoring and feedback systems.
- Machinery safety control equipment.
- Safety relay modules and electronic control boards.
- Lift and escalator control systems.
- Industrial hoists and crane control equipment.
- Automated warehouse and material-handling systems.
- Woodworking and industrial processing machinery.
- Medical and dental equipment control assemblies.
- Low-level signal monitoring circuits.
- Industrial automation and PCB-mounted control interfaces.
- OEM safety-related electronic equipment manufacturing.
