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66.82.8.120.4303 Finder Power relay 2pole 30A 120/125V
Finder 66.82.8.120.4303 is a Series 66 flange-mounted electromechanical power relay featuring a 120 V AC coil, two normally open 30 A contacts, silver tin oxide contact material and Faston 250 terminals for industrial electrical switching applications.
Why Choose the Finder 66.82.8.120.4303 Power Relay?
The Finder 66.82.8.120.4303 is a robust flange-mounted electromechanical power relay designed for reliable switching of electrical loads in industrial automation, electrical control equipment and commercial machinery. As part of the established Finder Series 66 power relay range, it combines high-current switching capability with convenient Faston connections and a durable mechanical construction.
Featuring a 120 V AC operating coil and a double-pole single-throw normally open (DPST-NO) contact configuration, this relay enables two separate electrical circuits to be switched simultaneously through a common electromagnetic mechanism. Its silver tin oxide (AgSnO2) contact material provides resistance to electrical wear and contact welding, supporting dependable switching performance in industrial applications.
With a 30 A rated contact current, a 250 V AC rated contact voltage and Faston 250 quick-connect terminals, the Finder 66.82.8.120.4303 is suitable for industrial control assemblies, heating equipment, machinery and OEM electrical systems. Its panel-mounted configuration provides secure installation without requiring direct PCB soldering, while the Series 66 insulation design supports separation between the control coil and switched circuits.
Key Advantages
- Robust Finder Series 66 electromechanical power relay for industrial electrical switching.
- 120 V AC operating coil suitable for AC-powered control circuits.
- Two normally open contacts (DPST-NO) enable simultaneous switching of two electrical loads.
- 30 A rated contact current for demanding power switching applications.
- Silver tin oxide (AgSnO2) contacts provide resistance to contact welding and electrical wear.
- Flange mounting arrangement supports secure mechanical installation in electrical equipment.
- Faston 250 quick-connect terminals simplify wiring, assembly and servicing.
- Reinforced insulation between coil and contacts supports electrical separation.
- Suitable for industrial automation, HVAC equipment, electrical heating and OEM machinery.
Key Features
- Finder Series 66 power relay.
- 120 V AC nominal coil voltage.
- 50/60 Hz AC coil operation.
- Two normally open contacts (2 NO / DPST-NO).
- 30 A rated contact current for resistive loads.
- 250 V AC rated contact voltage.
- 440 V AC maximum switching voltage, subject to load conditions.
- 7500 VA rated resistive switching load (AC-1).
- Silver tin oxide (AgSnO2) contact material.
- 3.6 VA nominal AC coil consumption.
- 30 mA nominal coil current at 50 Hz.
- Faston 250 terminals measuring 6.3 × 0.8 mm.
- Flange mounting for panel and chassis installation.
- Reinforced coil-to-contact insulation with 8 mm creepage and clearance distances.
- 6 kV impulse withstand capability between coil and contacts.
- Electromagnetic, monostable relay operation.
Reliable Power Switching for Industrial Automation and Electrical Control
Electromechanical power relays such as the Finder 66.82.8.120.4303 enable an AC control circuit to switch separate electrical loads through an electromagnetic operating mechanism. When the 120 V AC coil is energised, the relay closes its two normally open contacts, allowing current to flow through the connected load circuits. When the coil is de-energised, the contacts return to their normally open positions, disconnecting the controlled loads.
The Finder Series 66 is designed for electrical switching applications requiring robust contacts, reliable operation and reinforced insulation between control and load circuits. The 66.82 configuration combines flange mounting with Faston 250 terminals, making it suitable for industrial machinery, electrical cabinets and commercial equipment where accessible electrical connections are required. Appropriate circuit protection, conductor sizing, terminal compatibility and load assessment are essential for dependable operation at higher switching currents.
Typical Applications
- Industrial automation and electrical control systems.
- Industrial machinery and equipment switching circuits.
- Heating, ventilation and air conditioning (HVAC) equipment.
- Industrial washing machines and commercial appliances.
- Electrical heating and temperature control systems.
- Industrial ovens, boilers and burner control equipment.
- Auxiliary motor and electrical load switching circuits.
- Power management and electrical distribution control equipment.
- OEM electrical assemblies requiring flange-mounted power relays.
Technical Specifications
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| Device Type | Power Relay | |
|---|---|---|
| Terminal Type | Faston / flat-pin | |
| Switching Current (A) | 30 A | |
| Load Voltage | 440 V AC | |
| Mounting Type | Panel | |
| Manufacturer | Finder | |
| Series | 66 Series Power Relays | |
| Model | 66.82.8.120.4303 | |
| Manufacturer part number | 66.82.8.120.4303 | |
| Product type | Electromechanical power relay | |
| Contact configuration | DPST-NO (2 normally open contacts) | |
| Number of poles | 2 | |
| Nominal coil voltage | 120 V AC | |
| Coil type | AC operated | |
| Coil frequency | 50/60 Hz | |
| Coil resistance | 1.05 kΩ | |
| Nominal coil current | 30 mA at 50 Hz | |
| Nominal coil consumption | 3.6 VA at 50 Hz | |
| AC coil operating voltage range | 96–137 V AC | |
| Rated contact current | 30 A | |
| Rated contact voltage | 250 V AC | |
| Maximum switching voltage | 440 V AC / 220 V DC | |
| Rated resistive switching load (AC-1) | 7500 VA | |
| DC resistive contact rating | 25 A at 24 V DC | |
| Contact material | Silver tin oxide (AgSnO2) | |
| Mounting type | Panel / chassis mounting | |
| Mounting arrangement | Flange mounting | |
| Connection type | Faston 250 quick-connect terminals | |
| Terminal dimensions | 6.3 × 0.8 mm | |
| Number of terminals | 6 | |
| Relay operation | Monostable, non-latching | |
| Operate time | 8 ms | |
| Mechanical endurance | 10 million operations | |
| Electrical endurance | 100,000 operations at rated AC-1 load | |
| Coil-to-contact insulation | Reinforced insulation | |
| Impulse withstand voltage | 6 kV between coil and contacts | |
| Dielectric strength between coil and contacts | 4000 V AC | |
| Creepage and clearance | 8 mm between coil and contacts | |
| Dielectric strength between open contacts | 1500 V AC | |
| Operating temperature range | −40 to +70 °C | |
| Dimensions (L × W × H) | 68.5 × 33.5 × 31 mm | |
| Applicable relay standard | EN 61810-1 |
Frequently Asked Questions
What is the Finder 66.82.8.120.4303 used for?
The Finder 66.82.8.120.4303 is an electromechanical power relay designed for switching electrical loads in industrial automation, machinery control, HVAC systems and commercial electrical equipment.
What coil voltage does the Finder 66.82.8.120.4303 require?
The relay features a 120 V AC nominal operating coil designed for a 50/60 Hz AC supply. The manufacturer specifies an AC coil operating range of approximately 96–137 V AC under the relevant operating conditions.
What contact configuration does this Finder relay have?
The Finder 66.82.8.120.4303 features two normally open contacts (2 NO / DPST-NO), allowing two separate electrical circuits to be switched simultaneously when the relay coil is energised.
What is the rated switching current of this relay?
The relay provides a 30 A rated contact current for suitable resistive loads, with a rated AC-1 switching capacity of 7500 VA at 250 V AC. Permissible switching loads depend on voltage, load characteristics and operating conditions.
How is the Finder 66.82.8.120.4303 mounted?
The relay is designed for panel or chassis mounting using its flange arrangement. Electrical connections are made through Faston 250 quick-connect terminals measuring 6.3 × 0.8 mm.
What contact material is used in the Finder 66.82.8.120.4303?
The relay uses silver tin oxide (AgSnO2) contacts, which provide resistance to electrical wear and contact welding during demanding power switching operations.
Does the Finder 66.82.8.120.4303 provide electrical insulation between the coil and contacts?
Yes. The Finder Series 66 incorporates reinforced insulation between the coil and contacts, with 8 mm creepage and clearance distances and a 6 kV impulse withstand capability.
Can the Finder 66.82.8.120.4303 replace a DPDT changeover relay?
Not as a direct functional replacement. The Finder 66.82.8.120.4303 has two normally open contacts, whereas a DPDT changeover relay provides both normally open and normally closed switching paths. The contact configuration, coil voltage, mounting arrangement and electrical ratings must be checked before selecting a replacement.
What is the difference between the Finder 66.82.8.110.4303 and 66.82.8.120.4303?
The main distinction is the nominal coil voltage. The Finder 66.82.8.110.4303 uses a 110 V AC coil, while the 66.82.8.120.4303 uses a 120 V AC coil. Both belong to the Finder 66.82 power relay family, but their coil supply requirements must be considered when selecting a replacement.
Trusted by Industrial Automation Engineers and Electrical Equipment Manufacturers
Finder Series 66 power relays are designed for electrical engineers, industrial automation specialists and OEM equipment manufacturers requiring dependable high-current switching solutions. The Finder 66.82.8.120.4303 combines a 120 V AC operating coil, two normally open 30 A contacts, silver tin oxide contact technology and practical flange mounting with Faston connections for integration into industrial and commercial electrical equipment.
