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65.31.8.120.4309 Finder Power relay 1NO1 NC 20A 120V
Finder 65.31.8.120.4309 is a 30 A single-pole normally open electromagnetic power relay with a 120 V AC coil, silver tin oxide contacts, a minimum 3 mm contact gap and Faston 250 terminals for high-current industrial electrical switching and automation control.
Why Choose the Finder 65.31.8.120.4309 Power Relay?
The Finder 65.31.8.120.4309 is a heavy-duty electromagnetic power relay designed for reliable high-current electrical switching in industrial automation, machinery control and electrical power management systems. As part of the established Finder 65 Series power relay range, it combines robust electromechanical construction with a high-capacity normally open contact, 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 single-pole normally open contact arrangement (SPST-NO). The high-capacity contact design provides a minimum 3 mm contact gap when open, offering enhanced contact separation for industrial electrical switching applications. Its silver tin oxide (AgSnO2) contact material provides resistance to electrical wear and dependable performance when switching demanding electrical loads.
With a 30 A rated contact current, a 250 V AC rated contact voltage and a 7,500 VA resistive switching capacity, the Finder 65.31.8.120.4309 is suitable for controlling industrial heating equipment, lighting systems, electrical machinery and high-current load circuits. Its Faston 250 quick-connect terminals and panel-mounting construction support straightforward installation within electrical control panels and industrial equipment enclosures.
Key Advantages
- Heavy-duty 30 A electromagnetic power relay for industrial electrical switching.
- 120 V AC operating coil suitable for compatible industrial control circuits.
- Single-pole normally open contact (SPST-NO) for straightforward load switching.
- Minimum 3 mm contact gap provides enhanced separation between open contacts.
- 7,500 VA rated resistive switching capacity (AC1) for demanding electrical loads.
- Silver tin oxide (AgSnO2) contacts provide resistance to contact wear and reliable switching performance.
- Faston 250 quick-connect terminals simplify wiring, installation and maintenance.
- 2.2 VA AC coil consumption supports efficient electromagnetic operation.
- Galvanic isolation between the operating coil and switched load circuit.
- Robust construction suitable for industrial automation, heating and electrical power control applications.
Key Features
- Finder 65 Series industrial power relay.
- 120 V AC nominal coil voltage with 50/60 Hz operation.
- 30 A rated switching current for resistive loads.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage.
- Single-pole normally open contact configuration (SPST-NO).
- Minimum 3 mm contact gap when the relay is de-energised.
- AgSnO2 contact material for durable high-current switching.
- 7,500 VA rated resistive switching load (AC1).
- 1,250 VA rated inductive switching load (AC15 at 230 V AC).
- 120 A maximum peak contact current for a 5 ms duration.
- Faston 250 terminals measuring 6.3 × 0.8 mm.
- Electromechanical, non-latching operation for conventional relay control systems.
- Suitable for industrial machinery, electrical distribution and high-current load switching.
Reliable High-Current Switching for Industrial Automation
Electromagnetic power relays such as the Finder 65.31.8.120.4309 allow high-current 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, allowing current to flow through the connected load. When the coil is de-energised, the contact returns to its open position, interrupting the switched circuit.
The Finder 65 Series is designed for industrial applications requiring dependable high-current switching, electrical isolation and robust construction. The 30 A normally open contact with a minimum 3 mm contact gap provides a practical solution for switching demanding electrical loads. Its silver tin oxide contacts, electromechanical operating mechanism and convenient Faston connections make it suitable for industrial heating systems, machinery control and electrical power distribution equipment.
Typical Applications
- Industrial automation and electrical control panels.
- High-current electrical load switching systems.
- Industrial heating equipment, ovens and furnaces.
- Commercial and industrial lighting control circuits.
- Manufacturing machinery and production equipment.
- Single-phase motor control within the specified load ratings.
- Electrical power distribution and switching equipment.
- 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) | 30 A | |
| Load Voltage | 400 V AC | |
| Mounting Type | Panel | |
| Manufacturer | Finder | |
| Series | 65 Series Power Relays | |
| Model | 65.31.8.120.4309 | |
| Product type | Electromagnetic power relay | |
| Contact configuration | SPST-NO (single-pole normally open) | |
| Number of poles | 1 | |
| Number of normally open contacts | 1 | |
| Contact gap | ≥3 mm | |
| Rated contact current | 30 A | |
| Maximum peak contact current | 120 A for 5 ms | |
| Rated contact voltage | 250 V AC | |
| Maximum switching voltage | 400 V AC | |
| Rated resistive load (AC1) | 7,500 VA | |
| Rated inductive load (AC15 at 230 V AC) | 1,250 VA | |
| Single-phase motor rating at 230 V AC | 1.5 kW | |
| DC1 switching current at 24 V DC | 30 A | |
| Nominal coil voltage | 120 V AC | |
| Coil type | AC electromagnetic coil | |
| Coil frequency | 50/60 Hz | |
| Nominal coil consumption | 2.2 VA at 50 Hz | |
| Nominal coil current | Approximately 18.6 mA | |
| Coil resistance | Approximately 1.94 kΩ | |
| AC coil operating range | 80–110% of nominal voltage | |
| Contact material | Silver tin oxide (AgSnO2) | |
| Mounting type | Panel / chassis mounting | |
| Terminal type | Faston 250 quick-connect | |
| Terminal dimensions | 6.3 × 0.8 mm | |
| Switching mechanism | Electromechanical, non-latching | |
| Contact operation | Normally open, closes when the coil is energised | |
| Electrical life at rated AC1 load | 30,000 cycles | |
| Mechanical life | 10,000,000 cycles | |
| Operate time | 15 ms | |
| Release time | 4 ms | |
| Rated impulse withstand voltage between coil and contacts | 4 kV | |
| Dielectric strength between open contacts | 2,500 V AC | |
| Operating temperature range | −40 to +75 °C | |
| Environmental protection category | RT I | |
| Application | Industrial high-current electrical switching and automation control |
Frequently Asked Questions
What is the Finder 65.31.8.120.4309 used for?
The Finder 65.31.8.120.4309 is a high-current electromagnetic power relay used for switching electrical loads in industrial automation, machinery control, heating equipment, lighting installations and electrical power management systems.
What coil voltage does the Finder 65.31.8.120.4309 require?
The relay uses a 120 V AC operating coil designed for 50/60 Hz control supplies. Its nominal AC coil consumption is approximately 2.2 VA, and it must be connected to a compatible AC control circuit for reliable operation.
What is the contact current rating of this relay?
The Finder 65.31.8.120.4309 has a 30 A rated contact current and a 250 V AC rated contact voltage, providing a resistive switching capacity of 7,500 VA. The permissible switching current depends on the connected load, utilisation category and operating conditions.
What contact configuration does the Finder 65.31.8.120.4309 have?
The relay features a single-pole normally open contact (SPST-NO) with a minimum 3 mm contact gap. The contact closes when the electromagnetic coil is energised and opens when the coil is de-energised. Unlike changeover relays, this version does not provide a normally closed contact.
Where is the Finder 65.31.8.120.4309 typically installed?
The relay is suitable for installation in industrial electrical control panels, machinery enclosures and automation equipment. Its panel-mounting construction 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, automation specialists and industrial equipment manufacturers for dependable high-current electrical switching. Combining robust electromechanical construction, durable silver tin oxide contacts and practical installation features, the Finder 65.31.8.120.4309 provides a reliable solution for industrial control, electrical power management and automation applications.
