66.22.8.120.4301 Finder Power relay 2pole 30A 120/125V

Why Choose the Finder 66.22.8.120.4301 Power Relay?

The Finder 66.22.8.120.4301 is a heavy-duty 30 A electromagnetic power relay designed for reliable electrical switching in industrial automation, machinery control and commercial electrical equipment. Featuring a 120 V AC operating coil and two normally open contacts (2 NO / DPST-NO), it enables a single control signal to switch two separate electrical circuits simultaneously.

Part of the established Finder 66 Series power relay range, the 66.22.8.120.4301 combines silver tin oxide (AgSnO₂) contact material, direct printed circuit board (PCB) mounting and reinforced insulation between the coil and contacts. Its bifurcated PCB solder terminals provide secure connections for appropriately designed electronic assemblies, while its dual normally open contact arrangement is particularly suitable for coordinated load switching.

A key advantage of this particular model is its RT III wash-tight construction, identified by the final digit 1 in the manufacturer's ordering code. Unlike the standard RT II flux-proof version, this relay is designed to withstand suitable PCB washing processes when handled in accordance with Finder's instructions. With a 30 A rated contact current, 250 V AC rated contact voltage and 7500 VA AC1 resistive switching capacity, it offers a robust solution for OEM control boards, industrial heating equipment and automated machinery.

Key Advantages

• 30 A rated normally open contacts for suitable high-current electrical loads.
• 120 V AC operating coil for compatible industrial AC control systems.
• Two normally open contacts (DPST-NO) for simultaneous switching of two independent circuits.
• RT III wash-tight protection for PCB assemblies requiring compatible washing processes.
• Silver tin oxide (AgSnO₂) contacts for demanding electrical switching duties.
• 250 V AC rated contact voltage for industrial and commercial electrical equipment.
• 440 V AC maximum switching voltage, subject to the applicable load ratings.
• 7500 VA AC1 resistive switching capacity for suitable loads.
• Direct PCB mounting for efficient integration into electronic control assemblies.
• Bifurcated solder terminals for secure electrical and mechanical connections.
• Reinforced coil-to-contact insulation with 8 mm creepage and clearance distances.
• Monostable operation automatically opens both contacts when the coil is de-energised.

Key Features

• Finder 66 Series electromagnetic power relay.
• Manufacturer part number: 66.22.8.120.4301.
• Type 66.22 PCB-mounted construction.
• 120 V AC nominal coil voltage.
• 50/60 Hz AC coil operation.
• Two normally open contacts (2 NO / DPST-NO).
• 30 A rated current per normally open contact.
• 250 V AC rated contact voltage.
• 440 V AC maximum switching voltage.
• 7500 VA AC1 resistive switching capacity.
• 1200 VA AC15 switching capacity at 230 V AC.
• 1.5 kW single-phase motor switching rating at 230 V AC.
• Silver tin oxide (AgSnO₂) contact material.
• 3.6 VA nominal AC coil consumption at 50 Hz.
• 96–132 V AC standard coil operating range under specified reference conditions.
• RT III wash-tight environmental protection.
• Reinforced insulation between coil and contacts.
• 8 mm coil-to-contact creepage and clearance.
• 6 kV coil-to-contact impulse withstand capability.
• Direct PCB mounting with bifurcated solder terminals.
• 10 million mechanical operations under specified conditions.
• −40 to +70 °C standard operating temperature range.

Technical note: The specifications above reflect the Finder 66 Series 2 NO contact platform and its ordering-code conventions. For final equipment design, confirm the latest revision of the manufacturer's documentation for this exact part number, particularly contact material, maximum peak current, certifications and application-specific load ratings.

Reliable 30 A Dual-Pole Switching with 120 V AC Control

The Finder 66.22.8.120.4301 uses a 120 V AC electromagnetic coil to operate two independent normally open contact circuits. When the coil is energised, both contacts close, allowing electrical current to flow through their respective loads. When the control supply is removed, the contacts return to their normally open positions, interrupting the connected circuits.

Its DPST-NO configuration is particularly useful where two electrical circuits need to be energised together from a single control signal. Unlike a changeover relay, the 66.22.8.120.4301 does not provide normally closed switching terminals. This makes it suitable for coordinated equipment enable functions, heating control, power distribution control and other applications requiring straightforward dual-pole switching.

The RT III wash-tight enclosure is an important feature for PCB manufacturing processes involving compatible cleaning operations. It offers a higher level of protection against washing-related ingress than the standard RT II flux-proof version. However, wash-tight classification does not mean the finished relay is suitable for continuous immersion or unrestricted exposure to water. PCB conductor sizing, solder joint capacity, electrical clearances, thermal management and appropriate load protection remain essential for reliable high-current operation.

Typical Applications

• Industrial automation and electrical control systems.
• 120 V AC controlled power switching circuits.
• PCB-mounted industrial power control assemblies.
• Electronic assemblies requiring compatible post-solder washing processes.
• Machinery requiring two normally open switching functions.
• Industrial heating and temperature control equipment.
• Commercial ovens and catering equipment.
• Boiler, burner and furnace control assemblies.
• Industrial washing machines and commercial appliances.
• Single-phase motor switching within the applicable load ratings.
• HVAC and ventilation control equipment.
• Electrical power management and distribution control boards.
• Industrial process control and automated production equipment.
• OEM electronic control boards and industrial machine building.