Why Choose the Finder 40.61.6.012.4000 Bistable PCB Relay?
The Finder 40.61.6.012.4000 is a miniature 16 A bistable electromechanical relay designed for electrical switching in industrial automation, electronic control equipment and power management systems. Part of the Finder Series 40, this relay combines a single changeover contact with a mechanically maintained switching mechanism, making it suitable for applications where the relay must retain its selected contact position without continuous coil energisation.
Featuring a 12 V AC/DC operating coil and one changeover contact (1 CO / SPDT), the Finder 40.61.6.012.4000 provides switching capability for compatible electrical loads. Its 16 A rated contact current and 250 V AC rated contact voltage make it a practical choice for control circuits, electronic switching assemblies and automation equipment.
Unlike a conventional monostable relay, the 40.61.6.012.4000 uses a single-coil bistable mechanism. Its contact position is mechanically retained after an appropriate operating impulse, reducing the need for continuous coil power. With silver tin oxide (AgSnO2) contacts, compact dimensions and PCB or compatible socket mounting, it provides a versatile switching solution for electrical engineers and equipment manufacturers.
Key Advantages
- 16 A rated switching current for compatible electrical loads.
- 12 V AC/DC operating coil supports suitable low-voltage control circuits.
- Single-coil bistable operation maintains the selected switching state without continuous coil energisation.
- 1 CO / SPDT contact configuration provides normally open and normally closed switching paths.
- 250 V AC rated contact voltage supports suitable mains-voltage switching applications.
- Silver tin oxide contacts provide dependable switching performance for compatible loads.
- Compact miniature construction supports space-efficient electronic equipment design.
- PCB mounting capability enables integration into electronic control assemblies.
- Compatible Finder Series 95 sockets provide alternative mounting arrangements.
- Mechanically maintained contact position helps reduce holding power requirements.
- Single changeover contact provides flexibility for control and signalling applications.
- Suitable for industrial automation, electrical control and electronic switching systems.
Key Features
- Finder Series 40 miniature electromechanical relay.
- Type 40.61 with one changeover contact.
- Single-coil bistable operating mechanism.
- 12 V AC/DC rated operating voltage.
- 16 A rated contact current.
- 1 CO / SPDT contact arrangement.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage, subject to applicable installation conditions.
- Silver tin oxide (AgSnO2) contact material.
- 1 W nominal coil power.
- 130 Ω nominal coil resistance.
- Mechanically maintained switching state.
- PCB or compatible socket mounting.
- 5 mm contact pin pitch.
- Compact 29 × 12.4 × 25 mm body.
- Suitable for control circuits requiring bistable switching.
Reliable Bistable Switching for Industrial Control Systems
The Finder 40.61.6.012.4000 uses a single-coil bistable switching mechanism to maintain its selected contact position after an appropriate control impulse. Unlike a conventional monostable relay, which returns to its normal position when coil power is removed, a bistable relay retains its last mechanically selected switching state without continuous energisation.
Its 1 CO / SPDT contact arrangement provides a common contact that can connect to either the normally open or normally closed switching path. This makes the relay suitable for applications requiring alternative circuit selection, maintained control states or switching functions where the contact position must remain unchanged between operating impulses.
The 12 V AC/DC coil allows integration with compatible low-voltage control systems. The relay's bistable operating sequence must be implemented according to the Finder connection diagram, including the required control impulse duration and any specified switching arrangements. A minimum impulse duration of 20 ms applies to the bistable Series 40 design.
With a 16 A rated contact current, the relay can switch compatible electrical loads within the manufacturer's specified utilisation categories. Its AgSnO2 contacts are suited to electrical switching applications, although the actual permissible load depends on operating voltage, load type and switching inrush current.
The relay's compact 29 × 12.4 × 25 mm construction allows installation directly onto suitable printed circuit boards or through compatible Finder Series 95 sockets. Socket-based installation can simplify servicing and replacement in electrical control equipment, while PCB mounting supports compact electronic assemblies.
Typical Applications
- Industrial automation and control equipment.
- Electronic control and switching circuits.
- Printed circuit board relay assemblies.
- Power management and load control systems.
- Electrical circuits requiring mechanically maintained switching.
- Industrial machinery control.
- Building automation and control electronics.
- Alternative circuit selection and changeover switching.
- Control systems using 12 V AC/DC operating supplies.
- Electronic equipment requiring reduced relay holding power.
- Compatible lighting and electrical load switching.
- Relay interface assemblies using suitable Finder Series 95 sockets.
- Equipment requiring bistable contact retention following control impulses.
