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65.31.8.120.4000 Finder Power relay 1NO1 NC 20A 120V
Finder 65.31.8.120.4000 is a 20 A electromagnetic power relay from the Finder 65 Series with a 120 V AC coil, one normally open and one normally closed contact, rear flange mounting and Faston 250 terminals for industrial electrical switching and automation control.
£12.02
Why Choose the Finder 65.31.8.120.4000 Power Relay?
The Finder 65.31.8.120.4000 is a heavy-duty electromagnetic power relay designed for dependable electrical switching in industrial automation, machinery control and power management systems. As part of the established Finder 65 Series power relay range, it combines high-current switching capability with robust electromechanical construction, making it suitable for industrial control panels, electrical equipment manufacturers and OEM machinery applications.
This relay features a 120 V AC operating coil and a two-pole contact arrangement comprising one normally open (NO) and one normally closed (NC) contact. This configuration enables two independent electrical circuits to be controlled simultaneously, with one circuit closing and the other opening when the coil is energised. The relay provides galvanic isolation between the electromagnetic control coil and the switched contact circuits.
With a 20 A rated contact current and a 250 V AC rated contact voltage, the Finder 65.31.8.120.4000 is suitable for switching industrial electrical loads, heating equipment, lighting circuits and machinery control systems. Its rear flange mounting arrangement and Faston 250 quick-connect terminals enable convenient installation within electrical control panels and industrial equipment enclosures.
Key Advantages
- Heavy-duty 20 A electromagnetic power relay for industrial electrical switching.
- 120 V AC operating coil suitable for compatible industrial control circuits.
- One normally open and one normally closed contact provide complementary switching functions.
- 250 V AC rated contact voltage suitable for industrial electrical loads.
- 5,000 VA rated resistive switching capacity (AC1) for demanding applications.
- Faston 250 quick-connect terminals simplify wiring, installation and maintenance.
- Rear flange mounting supports secure installation in machinery and electrical panels.
- Galvanic isolation between the operating coil and switched electrical circuits.
- Robust electromechanical construction designed for repeated switching operations.
- Suitable for industrial automation, electrical distribution and machinery control applications.
Key Features
- Finder 65 Series industrial power relay.
- 120 V AC nominal coil voltage for 50/60 Hz operation.
- 20 A rated contact current.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage, subject to installation conditions.
- Two-pole contact configuration: 1 NO + 1 NC.
- 5,000 VA rated resistive switching load (AC1).
- 1,000 VA rated inductive switching load (AC15 at 230 V AC).
- 2.2 VA nominal AC coil consumption.
- Faston 250 terminals measuring 6.3 × 0.8 mm.
- Rear flange mounting for electrical control panels and industrial equipment.
- Electromechanical, non-latching operation.
- Suitable for controlling industrial electrical loads through a separate AC control circuit.
Reliable Electrical Switching for Industrial Automation
Electromagnetic power relays such as the Finder 65.31.8.120.4000 allow electrical loads to be controlled using a separate AC control circuit. When the 120 V AC coil is energised, the relay's electromagnetic mechanism closes its normally open contact and opens its normally closed contact. When the coil is de-energised, the contacts return to their normal positions, providing complementary switching functions for industrial control applications.
The Finder 65 Series is designed for applications requiring dependable high-current switching, electrical isolation and straightforward installation. Its combination of normally open and normally closed contacts enables different electrical functions to be controlled through a single relay, making it particularly useful in machinery control, electrical distribution equipment and industrial automation systems. The heavy-duty contact design and convenient Faston connections help simplify installation, maintenance and equipment replacement.
Typical Applications
- Industrial automation and electrical control panels.
- Manufacturing machinery and production equipment.
- Industrial heating systems, ovens and furnaces.
- Commercial and industrial lighting control circuits.
- Electrical power distribution and load switching equipment.
- Single-phase motor control within the specified load ratings.
- Industrial boilers, burners and temperature control systems.
- Building automation and electrical control installations.
- OEM machinery and industrial equipment manufacturing.
Technical Specifications
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| Device Type | Power Relay | |
|---|---|---|
| Terminal Type | Faston / flat-pin | |
| Switching Current (A) | 20 A | |
| Load Voltage | 400 V AC | |
| Mounting Type | Panel | |
| Manufacturer | Finder | |
| Series | 65 Series Power Relays | |
| Model | 65.31.8.120.4000 | |
| Product type | Electromagnetic power relay | |
| Contact configuration | 1 NO + 1 NC (SPST-NO + SPST-NC) | |
| Number of poles | 2 | |
| Normally open contacts | 1 | |
| Normally closed contacts | 1 | |
| Rated contact current | 20 A | |
| Rated contact voltage | 250 V AC | |
| Maximum switching voltage | 400 V AC | |
| Rated resistive load (AC1) | 5,000 VA | |
| Rated inductive load (AC15 at 230 V AC) | 1,000 VA | |
| Single-phase motor rating at 230 V AC | 1.1 kW | |
| Nominal coil voltage | 120 V AC | |
| Coil type | AC electromagnetic coil | |
| Coil frequency | 50/60 Hz | |
| Nominal coil consumption | 2.2 VA | |
| Mounting type | Rear flange / panel mounting | |
| Terminal type | Faston 250 quick-connect | |
| Terminal dimensions | 6.3 × 0.8 mm | |
| Switching mechanism | Electromechanical, non-latching | |
| Contact operation | One normally open and one normally closed contact | |
| Electrical isolation | Galvanic isolation between coil and contacts | |
| Application | Industrial electrical switching and automation control |
Frequently Asked Questions
What is the Finder 65.31.8.120.4000 used for?
The Finder 65.31.8.120.4000 is an electromagnetic power relay used for switching electrical loads in industrial automation systems, machinery control panels, heating equipment, lighting installations and electrical power management applications.
What coil voltage does the Finder 65.31.8.120.4000 require?
The relay uses a 120 V AC operating coil designed for compatible 50/60 Hz control supplies. The coil must be connected to the correct AC control voltage to ensure reliable electromagnetic operation.
What is the contact current rating of this relay?
The Finder 65.31.8.120.4000 has a 20 A rated contact current and a 250 V AC rated contact voltage. Its rated resistive switching capacity is 5,000 VA. The permissible switching current depends on the connected load, utilisation category and operating conditions.
What contact configuration does the Finder 65.31.8.120.4000 have?
The relay features one normally open (NO) contact and one normally closed (NC) contact. When the operating coil is energised, the normally open contact closes and the normally closed contact opens. These are two separate switching contacts rather than a single changeover contact.
Where is the Finder 65.31.8.120.4000 typically installed?
The relay is designed for installation in industrial electrical control panels, machinery enclosures and automation equipment. Its rear flange mounting arrangement and Faston 250 quick-connect terminals support convenient installation, wiring and maintenance.
Trusted by Industrial Automation Professionals Worldwide
Finder 65 Series power relays are used by electrical engineers, industrial automation specialists and equipment manufacturers for dependable high-current electrical switching. Combining robust electromechanical construction, versatile contact arrangements and practical installation features, the Finder 65.31.8.120.4000 provides a reliable solution for industrial control, electrical power management and automation applications.
