Why Choose the Finder 66.22.8.120.4300 Power Relay?
The Finder 66.22.8.120.4300 is a heavy-duty 30 A electromagnetic power relay designed for dependable electrical switching in industrial automation, machinery control and commercial equipment. Featuring a 120 V AC operating coil and two normally open contacts (2 NO / DPST-NO), this relay enables a single AC control signal to switch two independent electrical circuits simultaneously.
Part of the established Finder 66 Series power relay range, the 66.22.8.120.4300 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 electrical connections, while the two normally open contact sets are particularly suitable for applications requiring coordinated switching of separate power circuits.
With 30 A rated contacts, a 250 V AC rated contact voltage and a 7500 VA AC1 resistive switching capacity, the Finder 66.22.8.120.4300 is a practical choice for industrial heating equipment, commercial appliances, automated machinery and OEM control assemblies. Its 120 V AC coil supports equipment using higher-voltage AC control supplies, while its RT II flux-proof construction is designed for integration into suitably manufactured PCB assemblies.
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.
- 250 V AC rated contact voltage for industrial and commercial equipment.
- 440 V AC maximum switching voltage, subject to the applicable load ratings.
- 7500 VA AC1 switching capacity for suitable resistive loads.
- Silver tin oxide (AgSnO₂) contacts for robust switching performance.
- Direct PCB mounting for integration into electronic control assemblies.
- Bifurcated solder terminals for secure mechanical and electrical connections.
- Reinforced coil-to-contact insulation with 8 mm creepage and clearance distances.
- 6 kV impulse withstand capability between the coil and contacts.
- Monostable operation automatically opens both contacts when the coil is de-energised.
Key Features
- Finder 66 Series electromagnetic power relay.
- Type 66.22 PCB-mounted configuration.
- 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.
- 120 A maximum peak contact current for 5 ms with the specified AgSnO₂ contact system.
- 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 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 coil operating range under specified reference conditions.
- Reinforced insulation between coil and contacts.
- 8 mm coil-to-contact creepage and clearance.
- 6 kV coil-to-contact impulse withstand rating.
- RT II flux-proof environmental protection.
- 10 million mechanical operations under specified conditions.
- −40 to +70 °C ambient operating temperature range.
Reliable 30 A Dual-Pole Switching with 120 V AC Control
The Finder 66.22.8.120.4300 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 coil supply is removed, the contacts return to their normally open positions, interrupting the connected circuits.
The DPST-NO contact arrangement is particularly useful where two circuits must be energised together using a single control signal. Unlike a changeover relay, the Finder 66.22.8.120.4300 does not provide normally closed switching terminals. Its AgSnO₂ contact material and high-current contact ratings make it suitable for demanding electrical switching duties, provided the connected loads remain within the manufacturer's specified limits.
The relay also features reinforced insulation between the coil and contacts, with 8 mm creepage and clearance distances and a 6 kV impulse withstand rating. Its RT II flux-proof construction supports suitable PCB soldering processes but should not be confused with an RT III wash-tight version. Appropriate PCB conductor sizing, solder joint capacity, protective devices, electrical clearances and thermal management are essential when designing high-current switching assemblies.
Typical Applications
- Industrial automation and electrical control systems.
- 120 V AC controlled power switching circuits.
- PCB-mounted industrial power control assemblies.
- 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.
