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.
Silver Tin Oxide Contacts for Demanding Switching Applications
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.
Technical Specifications
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Terminal Type
PCB / pins
Switching Current (A)
30 A
Load Voltage
440 V AC
Mounting Type
PCB
Manufacturer
Finder
Series
66 Series
Manufacturer part number
66.22.8.230.4300
Product type
Industrial electromechanical power relay
Relay operation
Monostable / non-latching
Number of poles
2
Contact configuration
2 NO (DPST-NO)
Contact material
Silver tin oxide (AgSnO₂)
Rated contact current
30 A
Maximum peak contact current
120 A for 5 ms, under specified conditions
Rated switching voltage
250 V AC
Maximum switching voltage
440 V AC
Rated resistive load (AC1)
7,500 VA
Rated inductive load (AC15)
1,200 VA at 230 V AC
Single-phase motor rating
1.5 kW at 230 V AC
DC1 breaking capacity at 30 V DC
25 A
DC1 breaking capacity at 110 V DC
0.7 A
DC1 breaking capacity at 220 V DC
0.3 A
Minimum switching load
1,000 mW (10 V / 10 mA)
Nominal coil voltage
230 V AC
Coil supply type
AC
Coil frequency
50/60 Hz
Rated AC coil consumption
3.6 VA at 50 Hz
Nominal coil resistance
Approximately 4,000 Ω
Nominal coil current
Approximately 15.7 mA
AC coil operating range
80–110% of nominal voltage
Approximate operating voltage range
184–253 V AC
Operate time
Approximately 8 ms
Release time
Approximately 10–15 ms, depending on operating conditions
Coil-to-contact dielectric strength
6,000 V AC
Coil-to-contact impulse withstand voltage
6 kV (1.2/50 µs)
Coil-to-contact creepage and clearance
8 mm
Mechanical life
10 million operations, standard 66 Series rating
Electrical life at rated AC1 load
100,000 operations, standard 66 Series rating
Operating temperature
−40 to +70 °C
Mounting type
Direct PCB mounting
Terminal type
PCB solder pins
Approximate body dimensions
51.5 × 33.5 × 31 mm
Typical application
High-current industrial switching and PCB power control
Frequently Asked Questions
What is the Finder 66.22.8.230.4300 used for?
The Finder 66.22.8.230.4300 is a 30 A electromechanical power relay used for industrial automation, high-current PCB switching and electrical control applications. It features a 230 V AC coil and two normally open contacts.
What coil voltage does the Finder 66.22.8.230.4300 require?
The relay requires a 230 V AC nominal coil supply at 50/60 Hz. Its standard AC coil operating range is approximately 184–253 V AC, corresponding to 80–110% of nominal voltage.
Does the Finder 66.22.8.230.4300 have normally open or changeover contacts?
The 66.22.8.230.4300 has two normally open contacts (2 NO / DPST-NO). Both contacts close when the coil is energised and open when the coil is de-energised. This specific version does not provide normally closed switching contacts.
Can the Finder 66.22.8.230.4300 switch 30 A loads?
Yes. The relay has a 30 A rated contact current and a 7,500 VA AC1 resistive switching capacity under specified conditions. The permissible load may be lower for motors, inductive circuits and equipment with high inrush currents. The short-duration 120 A peak rating is not a continuous current rating.
Can the Finder 66.22.8.230.4300 be mounted directly onto a DIN rail?
No. The Finder 66.22.8.230.4300 is designed for direct PCB mounting using solder terminals. It is intended for integration into a compatible printed circuit board or engineered electronic assembly rather than direct DIN rail installation.
Trusted by Industrial Automation and Electrical Engineering Professionals
Finder 66 Series power relays provide robust electromechanical switching solutions for industrial machinery, electronic equipment and high-current electrical control systems. Combining 30 A switching capability, reinforced insulation and PCB-compatible construction, the 66.22 range supports electrical engineers, equipment manufacturers, automation specialists and industrial maintenance teams.
Terminal Type
PCB / pins
Switching Current (A)
30 A
Load Voltage
440 V AC
Mounting Type
PCB
Manufacturer
Finder
Series
66 Series
Manufacturer part number
66.22.8.230.4300
Product type
Industrial electromechanical power relay
Relay operation
Monostable / non-latching
Number of poles
2
Contact configuration
2 NO (DPST-NO)
Contact material
Silver tin oxide (AgSnO₂)
Rated contact current
30 A
Maximum peak contact current
120 A for 5 ms, under specified conditions
Rated switching voltage
250 V AC
Maximum switching voltage
440 V AC
Rated resistive load (AC1)
7,500 VA
Rated inductive load (AC15)
1,200 VA at 230 V AC
Single-phase motor rating
1.5 kW at 230 V AC
DC1 breaking capacity at 30 V DC
25 A
DC1 breaking capacity at 110 V DC
0.7 A
DC1 breaking capacity at 220 V DC
0.3 A
Minimum switching load
1,000 mW (10 V / 10 mA)
Nominal coil voltage
230 V AC
Coil supply type
AC
Coil frequency
50/60 Hz
Rated AC coil consumption
3.6 VA at 50 Hz
Nominal coil resistance
Approximately 4,000 Ω
Nominal coil current
Approximately 15.7 mA
AC coil operating range
80–110% of nominal voltage
Approximate operating voltage range
184–253 V AC
Operate time
Approximately 8 ms
Release time
Approximately 10–15 ms, depending on operating conditions
Coil-to-contact dielectric strength
6,000 V AC
Coil-to-contact impulse withstand voltage
6 kV (1.2/50 µs)
Coil-to-contact creepage and clearance
8 mm
Mechanical life
10 million operations, standard 66 Series rating
Electrical life at rated AC1 load
100,000 operations, standard 66 Series rating
Operating temperature
−40 to +70 °C
Mounting type
Direct PCB mounting
Terminal type
PCB solder pins
Approximate body dimensions
51.5 × 33.5 × 31 mm
Typical application
High-current industrial switching and PCB power control
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