Why Choose the Finder 66.22.8.230.4300 Power Relay?
The Finder 66.22.8.230.4300 is a heavy-duty 30 A electromechanical power relay designed for industrial automation, electrical control systems and high-current switching applications. Part of the established Finder 66 Series, this relay combines robust switching performance with a compact printed circuit board (PCB) mounting arrangement.
Featuring a 230 V AC operating coil and two normally open contacts (2 NO / DPST-NO), the Finder 66.22.8.230.4300 enables two separate electrical circuits to be switched simultaneously using a single control signal. Its silver tin oxide (AgSnO₂) contacts provide dependable performance for demanding electrical loads, including applications where switching inrush current is an important consideration.
With a 30 A rated contact current, 250 V AC rated switching voltage and 7,500 VA AC1 resistive switching capacity, this relay is suitable for industrial equipment, heating systems, machinery and power control applications. Its PCB mounting design allows integration into electronic assemblies and industrial control equipment.
The 66.22.8.230.4300 combines high-current switching capability with reinforced insulation between the coil and contacts, making it a practical choice for equipment manufacturers, electrical engineers and industrial maintenance professionals.
Key Advantages
- 30 A rated contact current for high-current industrial switching applications.
- 230 V AC nominal coil for compatible mains-voltage control circuits.
- Two normally open contacts (DPST-NO) allow simultaneous switching of two separate circuits.
- Silver tin oxide (AgSnO₂) contact material provides robust performance for demanding switching duties.
- 7,500 VA AC1 resistive switching capacity for appropriately rated electrical loads.
- 250 V AC rated switching voltage with a maximum switching voltage of 440 V AC.
- 120 A maximum peak contact current for 5 ms under specified conditions.
- Direct PCB mounting supports integration into industrial electronic equipment.
- Reinforced coil-to-contact insulation supports electrical separation between control and load circuits.
- 8 mm creepage and clearance distance between coil and contacts.
- Monostable operation automatically opens the contacts when the coil is de-energised.
- Suitable for industrial automation, OEM equipment and electrical power control systems.
Key Features
- Finder 66 Series industrial power relay.
- Type 66.22: Two-pole PCB mounting power relay.
- 230 V AC nominal operating coil.
- 50/60 Hz AC coil operation.
- Two normally open contacts (2 NO / DPST-NO).
- 30 A rated contact current.
- 120 A maximum peak current for 5 ms under specified conditions.
- 250 V AC rated switching voltage.
- 440 V AC maximum switching voltage.
- 7,500 VA AC1 resistive switching capacity.
- 1,200 VA AC15 inductive switching capacity at 230 V AC.
- 1.5 kW single-phase motor rating at 230 V AC.
- Silver tin oxide (AgSnO₂) contacts.
- 3.6 VA nominal AC coil consumption at 50 Hz.
- 6 kV coil-to-contact impulse withstand voltage.
- 8 mm coil-to-contact creepage and clearance.
- PCB solder-terminal mounting.
- Compact body dimensions: approximately 51.5 × 33.5 × 31 mm.
30 A Two-Pole Switching for Industrial Power Control
The Finder 66.22.8.230.4300 operates using an electromagnetic coil that controls two mechanically linked normally open contacts. When the specified 230 V AC control voltage is applied, the relay energises and closes both contacts, allowing current to flow through the connected circuits.
When the coil supply is removed, the contacts return to their normally open positions. This monostable switching arrangement makes the relay suitable for applications where connected loads should be energised only while the control signal is present.
The 2 NO / DPST-NO contact configuration allows two separate circuits to be switched simultaneously. This can be useful for switching two conductors of a supply, operating separate loads or controlling multiple electrical functions from a common signal, provided the complete circuit design meets the applicable safety requirements.
Each normally open contact is rated at 30 A under the specified conditions. The relay's 7,500 VA AC1 rating applies to suitable resistive loads, while inductive loads, motors and electronic equipment may require lower switching currents.
A key feature of the Finder 66.22.8.230.4300 is its AgSnO₂ contact material. Silver tin oxide contacts are commonly used in power relays where resistance to contact welding and dependable performance under challenging switching conditions are important.
The relay's normally open contacts are specified for a maximum peak current of 120 A for 5 ms under defined conditions. This short-duration capability is relevant when evaluating loads that produce substantial inrush currents during switching.
However, the 120 A peak rating must not be interpreted as a continuous current rating. The relay's nominal contact current remains 30 A, and the permissible load depends on the current waveform, switching frequency, power factor and operating environment.
For equipment such as transformers, motors, heating systems and electronic power supplies, the actual load characteristics should be checked against the manufacturer's contact ratings before selecting the relay.
PCB Mounting and Reinforced Electrical Insulation
The Finder 66.22.8.230.4300 is designed for direct printed circuit board mounting. Its solder terminals provide a permanent connection to a suitably designed PCB, making it useful for industrial electronic assemblies and original equipment manufacturing.
The relay provides reinforced insulation between the coil and contacts, with an 8 mm creepage and clearance distance. This supports electrical separation between the control circuit and the switched load circuits.
Because the relay can switch substantial current, PCB layout is particularly important. The circuit board must provide suitable conductor cross-sections, copper track capacity, thermal performance and electrical spacing for the intended application.
The relay itself is not designed for direct DIN rail mounting. Where installation in a control cabinet is required, it is normally incorporated into a suitable PCB assembly or an appropriately engineered mounting arrangement.
The 230 V AC coil supply must be distinguished from the contact switching voltage. The coil is designed for a compatible AC control circuit, while the contacts are rated for switching electrical loads within their specified limits.
Typical Applications
- Industrial automation and machinery control.
- High-current printed circuit board switching.
- Industrial electrical control equipment.
- Heating and resistive load control.
- OEM electrical and electronic equipment.
- Two-pole power switching applications.
- Single-phase motor control within specified ratings.
- Industrial process and production machinery.
- Building management and HVAC equipment.
- Power supply and auxiliary load control systems.
