Why Choose the Finder 40.61.6.024.4000 Bistable Miniature Power Relay?
The Finder 40.61.6.024.4000 is a compact 16 A bistable miniature power relay designed for electrical load switching, industrial automation and electronic control systems. Part of the Finder Series 40, this electromechanical relay combines a high-current changeover contact with a single-coil latching mechanism, making it suitable for applications where the switching state must be maintained without continuously energising the coil.
Featuring a 24 V AC/DC nominal control coil, a single changeover contact (SPDT / 1 CO) and 16 A rated contact current, the Finder 40.61.6.024.4000 provides flexible switching of compatible electrical loads. Its silver tin oxide (AgSnO2) contacts are designed for robust switching performance, including applications involving higher inrush currents.
Unlike conventional monostable relays, this bistable relay retains its last switching position after the control pulse has ended. Its compact 12.4 × 29 × 25 mm housing supports PCB installation or mounting in a compatible relay socket, making it a practical choice for machine builders, control panel manufacturers and electronics engineers.
Key Advantages
- 16 A rated contact current for switching compatible electrical loads.
- 24 V AC/DC bistable coil for pulse-operated control systems.
- Single changeover contact (SPDT / 1 CO) provides normally open and normally closed switching paths.
- Bistable operation maintains the selected contact position without continuous coil energisation.
- Reduced continuous coil power consumption compared with a relay requiring permanent energisation.
- Silver tin oxide (AgSnO2) contacts offer robust switching characteristics.
- Suitable for compatible loads with elevated switching inrush currents.
- Compact miniature housing supports space-efficient equipment design.
- PCB and compatible socket mounting provide installation flexibility.
- Electromechanical contacts provide physical separation between open contact terminals.
- Useful for industrial automation, switching control and state-retention applications.
Key Features
- Finder Series 40 miniature power relay.
- Type 40.61 with one changeover contact.
- 24 V AC/DC nominal coil voltage.
- Single-coil bistable switching mechanism.
- 16 A rated contact current.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage.
- 4000 VA rated AC1 switching capacity.
- SPDT / 1 Form C / 1 CO contact configuration.
- Silver tin oxide (AgSnO2) contact material.
- 40 Ω coil resistance.
- 1 W nominal DC coil power.
- Contact position retained after the operating pulse.
- PCB mounting or installation in a compatible relay socket.
- 12.4 mm body width.
- -40 to +85 °C operating temperature range.
- Designed for switching compatible resistive and industrial control loads.
Energy-Efficient Bistable Switching for Electrical Control Systems
The Finder 40.61.6.024.4000 uses a single-coil bistable switching mechanism to change and retain its contact position. Unlike a conventional monostable relay, which requires continuous coil energisation to maintain its operated state, a bistable relay maintains its selected position after the control pulse has ended. This makes it particularly useful in applications where electrical loads must remain in their selected state without a continuous control supply.
The relay's single changeover contact provides a common terminal that can connect to either a normally closed or normally open contact path. This arrangement supports flexible circuit design, including load selection, control logic and electrical switching functions. The AgSnO2 contact material is well suited to applications requiring robust switching performance, provided that the connected load remains within the manufacturer's specified electrical ratings.
Correct pulse polarity, duration and switching sequence are important when operating a single-coil bistable relay. Installers should follow the manufacturer's wiring diagram rather than treating the relay as a conventional continuously energised device. When used with an appropriate PCB footprint or compatible socket, the Finder 40.61.6.024.4000 provides a compact solution for control systems requiring retained switching states.
Typical Applications
- Industrial automation and electrical control systems.
- Pulse-operated load switching circuits.
- Energy-conscious control applications requiring retained relay states.
- Industrial machinery and automated equipment.
- Building automation and electrical switching systems.
- Electronic control and interface circuits.
- Control panels and modular electrical assemblies.
- Electrical load selection and changeover circuits.
- Equipment requiring maintained switching positions.
- OEM machinery and PCB-based control assemblies.
- Lighting control circuits with compatible electrical loads.
- Applications involving compatible higher-inrush electrical loads.
