65.31.8.012.4300 Finder Power relay 1NO 30A 12VNO

Why Choose the Finder 65.31.8.012.4300 Power Relay?

The Finder 65.31.8.012.4300 is a heavy-duty 30 A electromechanical power relay designed for industrial automation, electrical control panels, machinery and high-current switching applications. Part of the Finder 65 Series, this relay combines robust contact performance with a practical flange-mounting arrangement and Faston quick-connect terminals.

Featuring a 12 V AC operating coil and one normally open contact (1 NO / SPST-NO), the Finder 65.31.8.012.4300 enables a low-voltage AC control circuit to operate a separate, higher-current electrical load. Its silver tin oxide (AgSnO₂) contact material is suited to demanding switching applications where contact durability and resistance to welding are important.

With a 30 A rated contact current, 250 V AC rated switching voltage and 7,500 VA AC1 resistive switching capacity, this relay provides substantial switching capability for industrial equipment. The minimum 3 mm open-contact gap and 2,500 V AC dielectric strength between open contacts make the -4300 configuration particularly useful where increased contact separation is required.

The relay is designed for panel mounting using its integrated flange, with 6.3 × 0.8 mm Faston 250 terminals providing convenient electrical connections.

Key Advantages

• 30 A rated contact current for high-current industrial switching applications.
• 12 V AC nominal coil for compatible low-voltage AC control circuits.
• Single normally open contact (SPST-NO) for straightforward load switching.
• 7,500 VA AC1 switching capacity for appropriately rated resistive loads.
• 120 A maximum peak current for 5 ms under specified conditions.
• Silver tin oxide (AgSnO₂) contact material provides robust switching performance.
• Minimum 3 mm contact gap for increased separation between open contacts.
• 2,500 V AC dielectric strength between open contacts.
• Integrated mounting flange supports secure panel installation.
• Faston 250 quick-connect terminals simplify wiring and maintenance.
• Monostable operation returns the contact to its open position when the coil is de-energised.
• Suitable for machinery, industrial electrical equipment and high-current control systems.

Key Features

• Finder 65 Series industrial power relay.
• Type 65.31-4300: 30 A flange-mounted relay.
• 12 V AC operating coil.
• 50/60 Hz coil operation.
• One normally open contact (1 NO / SPST-NO).
• 30 A rated contact current.
• 120 A maximum peak current for 5 ms under specified conditions.
• 250 V AC rated switching voltage.
• 400 V AC maximum switching voltage.
• 7,500 VA AC1 resistive switching capacity.
• 1,250 VA AC15 switching capacity at 230 V AC.
• 1.5 kW single-phase motor rating at 230 V AC.
• Silver tin oxide (AgSnO₂) contacts.
• Minimum 3 mm open-contact gap.
• 2.2 VA rated AC coil consumption at 50 Hz.
• 4 kV coil-to-contact impulse withstand voltage.
• Flange mounting for installation onto a suitable panel or mounting surface.
• Faston 250 terminals measuring 6.3 × 0.8 mm.

30 A High-Current Switching for Industrial Equipment

The Finder 65.31.8.012.4300 operates using an electromagnetic coil that controls a single normally open power contact. When the specified 12 V AC control voltage is applied, the relay energises and closes the contact, allowing current to flow through the connected load. When the coil is de-energised, the contact returns to its normally open position.

This arrangement enables a low-voltage control circuit to switch a separate electrical load without carrying the full load current through the control device. The relay's 30 A rated contact current and 7,500 VA AC1 switching capacity make it suitable for demanding resistive switching duties within the manufacturer's specified limits.

The relay also provides a 120 A peak-current capability for 5 ms on the normally open contact under defined conditions. This short-duration rating is relevant when assessing loads with starting or inrush currents, but it must not be interpreted as a continuous operating current.

For motors, transformers, solenoids and electronic loads, the applicable switching category and actual inrush characteristics must be considered. The relay's resistive AC1 rating cannot automatically be applied to every type of electrical load.

Minimum 3 mm Contact Gap for Enhanced Open-Contact Separation

A distinguishing feature of the Finder 65.31-4300 configuration is its minimum 3 mm contact gap. This provides increased physical separation between the contacts when the relay is de-energised.

The relay is also specified with a 2,500 V AC dielectric strength between open contacts, supporting applications where open-contact insulation performance is an important design consideration.

Although the extended gap is a valuable characteristic, it does not automatically make the relay suitable as a safety isolator or emergency switching device. Any application requiring safety isolation, protective disconnection or compliance with a particular installation standard must be assessed against the complete equipment design and relevant certification requirements.

Flange Mounting and Faston 250 Connections

The Finder 65.31.8.012.4300 features an integrated mounting flange for secure installation onto a suitable panel or mounting surface. This arrangement is particularly useful for industrial equipment where the relay must be mechanically fixed independently of its electrical connections.

The relay uses Faston 250 quick-connect terminals measuring 6.3 × 0.8 mm. These terminals allow compatible push-on connectors to be used for the coil and contact circuits.

When installing the relay, the terminal connectors, conductor sizes and protective devices must be suitable for the intended electrical load. High-current installations require particular attention to connection quality, contact resistance, conductor temperature and enclosure ventilation.

The 12 V AC coil supply must be distinguished from the contact switching voltage. The relay requires a compatible 12 V AC control supply and should not be connected directly to a 12 V DC source unless a different coil version is selected.

Typical Applications

• Industrial automation and machinery control.
• High-current electrical load switching.
• Industrial control panels and electrical equipment.
• Heating and resistive load control within specified ratings.
• Single-phase motor switching within the manufacturer's motor rating.
• Industrial process equipment.
• OEM machinery and equipment manufacturing.
• Electrical power distribution control circuits.
• Building services and HVAC control equipment.
• Maintenance and replacement in compatible Finder 65 Series installations.