Why Choose the Finder 65.31.9.220.4000 Power Relay?
The Finder 65.31.9.220.4000 is a heavy-duty 20 A industrial electromechanical power relay designed for high-current electrical switching in industrial automation, machinery and control systems. Part of the Finder 65 Series, this relay features a 220 V DC nominal operating coil and a 1 NO + 1 NC contact configuration, providing separate normally open and normally closed switching functions.
With silver tin oxide (AgSnO₂) contacts, a 20 A rated contact current and a 5,000 VA AC1 resistive switching capacity, the Finder 65.31.9.220.4000 is designed for switching compatible industrial electrical loads. Its 250 V AC rated contact voltage makes it suitable for a range of electrical power-control applications, provided the relevant load ratings and installation requirements are observed.
The relay's 220 V DC coil makes it particularly relevant to industrial equipment, electrical power installations and control systems designed around high-voltage DC control supplies. Faston 250 quick-connect terminals and a rear flange mounting arrangement support practical installation in compatible equipment.
Specification note: The contact and construction details below describe the Finder 65.31-4000 configuration. Exact coil resistance, operating voltage limits and availability of the 220 V DC variant should be checked against Finder's current part-specific documentation before ordering or installation.
Key Advantages
- 20 A rated contact current for industrial electrical load switching.
- 220 V DC nominal coil for compatible high-voltage DC control circuits.
- 1 NO + 1 NC contact configuration for complementary switching functions.
- Two independently wired contact circuits for flexible electrical control.
- Silver tin oxide (AgSnO₂) contacts for robust industrial switching.
- 5,000 VA AC1 resistive switching capacity for appropriately rated loads.
- Faston 250 quick-connect terminals for convenient wiring.
- Rear flange mounting for secure installation on compatible panels or chassis.
- Non-latching operation returns the contacts to their normal positions when coil power is removed.
- Industrial-grade construction for machinery and electrical control equipment.
- Separate control and load circuits for electrically operated switching.
- Suitable for industrial automation, power-control equipment and maintenance applications.
Key Features
- Finder 65 Series industrial power relay.
- 20 A rated contact current.
- 220 V DC nominal coil voltage.
- One normally open contact (1 NO).
- One normally closed contact (1 NC).
- SPST-NO + SPST-NC contact arrangement.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage, subject to the manufacturer's specified conditions.
- 5,000 VA AC1 resistive load rating.
- Silver tin oxide (AgSnO₂) contact material.
- Faston 250 quick-connect terminals, measuring 6.3 × 0.8 mm.
- Rear flange mounting arrangement.
- Six electrical terminals for the coil and two separate contact circuits.
- Monostable, non-latching operation.
- Finder 65 Series industrial switching construction.
Reliable 20 A Switching for 220 V DC Control Systems
The Finder 65.31.9.220.4000 operates as an electrically controlled switching device. When the 220 V DC coil is energised within its specified operating range, the normally open contact closes while the normally closed contact opens. When coil power is removed, both contacts return to their original states.
This 1 NO + 1 NC configuration is useful where one circuit needs to be activated while another is disconnected. Typical functions include auxiliary equipment control, industrial signalling and complementary switching arrangements.
Unlike a conventional changeover relay, the Finder 65.31-4000 arrangement provides two independently wired contacts rather than a shared common terminal. This distinction is important when designing wiring arrangements or selecting a replacement relay.
The silver tin oxide contacts are intended for repeated switching of compatible electrical loads. The 20 A rated contact current and 5,000 VA AC1 resistive switching capacity provide a practical switching solution for industrial electrical equipment.
However, the 220 V DC coil rating is not the same as the relay's DC contact breaking capacity. The coil voltage identifies the control supply required to operate the relay; the permissible DC voltage and current across its contacts must be assessed separately using the manufacturer's DC switching characteristics.
Installation and Electrical Compatibility
The Finder 65.31.9.220.4000 is intended for installation in compatible industrial electrical equipment. Its rear flange mounting arrangement allows the relay to be secured to a suitable panel or chassis, while Faston 250 terminals provide connections for the coil and load circuits.
Before installation, verify that the control supply is suitable for the relay's 220 V DC nominal coil. Because high-voltage DC can present significant electrical hazards, installation and maintenance should be undertaken by appropriately qualified personnel using suitable isolation and protection procedures.
Check the connected load's steady-state current, inrush current, voltage and switching characteristics against the relay's published ratings. Inductive loads, motors and high-voltage DC loads may require additional protective components and careful assessment.
Typical Applications
- Industrial automation and electrical control panels.
- Equipment using nominal 220 V DC control supplies.
- Industrial machinery and manufacturing equipment.
- Electrical load switching and auxiliary equipment control.
- Complementary normally open and normally closed switching functions.
- Industrial heating and temperature control equipment.
- Commercial and industrial lighting control.
- Electrical signalling and equipment status circuits.
- Industrial process control systems.
- Electrical power management equipment.
- Power generation and distribution auxiliary control systems.
- Ventilation and HVAC equipment control.
- Conveyor systems and material handling equipment.
- Maintenance and replacement of compatible industrial relays.
- Applications requiring a 220 V DC coil and 20 A 1 NO + 1 NC contact configuration.
