66.82.9.024.4003 Finder Power relay 2pole 30A DC 24V

Why Choose the Finder 66.82.9.024.4003 Power Relay?

The Finder 66.82.9.024.4003 is a specialist electromagnetic power relay from the Finder Series 66 range, designed for reliable electrical switching in industrial automation, machinery control and power management equipment. Its ordering code identifies a 24 V DC operating coil, two changeover contacts (DPDT), silver tin oxide (AgSnO2) contact material and a special version associated with ATEX and hazardous-location applications.

The Finder 66.82 configuration combines a robust electromechanical switching mechanism with Faston 250 quick-connect terminals and top-flange mounting. This construction provides a practical solution for industrial equipment requiring secure mechanical installation, accessible wiring and reliable switching of two electrical circuits using a single control signal.

Unlike standard Series 66 relays, the .4003 special-version suffix identifies a configuration intended for applications requiring additional hazardous-location considerations. Finder documents special Series 66 variants for Ex ec nC and HazLoc Class I, Division 2 applications. These special versions have different operating conditions and may have lower contact current ratings than standard 30 A versions. The exact certification, temperature classification and permissible electrical ratings of 66.82.9.024.4003 must therefore be verified against the applicable Finder documentation before installation.

Key Advantages

• 24 V DC operating coil suitable for common industrial control supplies.
• DPDT contact arrangement provides two independent changeover switching circuits.
• Silver tin oxide (AgSnO2) contacts offer robust electrical switching characteristics.
• Special .4003 version associated with ATEX and hazardous-location applications.
• Reinforced insulation between coil and contacts supports separation of control and load circuits.
• 8 mm creepage and clearance distances in the Series 66 insulation design.
• Faston 250 quick-connect terminals simplify electrical connections and equipment assembly.
• Top-flange mounting provides secure installation in machinery and electrical enclosures.
• Two changeover contacts provide normally open and normally closed switching functions.
• Non-latching electromechanical operation returns contacts to their normal state when coil power is removed.
• Industrial Series 66 construction supports integration into demanding electrical control systems.
• Cadmium-free AgSnO2 contact material offers an alternative to silver cadmium oxide contacts.

Key Features

• Finder Series 66 industrial electromagnetic power relay.
• Manufacturer part number: 66.82.9.024.4003.
• 24 V DC nominal coil voltage.
• DC-operated electromagnetic coil.
• DPDT (2 Form C) contact configuration.
• Two changeover contacts with normally open and normally closed connections.
• Silver tin oxide (AgSnO2) contact material.
• Special hazardous-location version designation.
• Ex ec nC and HazLoc options within the Finder Series 66 range.
• 25 A contact class associated with Finder's special version 3 relay configurations, subject to the exact approved ratings.
• 250 V AC nominal switching voltage in the standard Series 66 contact specification.
• Reinforced coil-to-contact insulation.
• 6 kV coil-to-contact impulse withstand capability in the Series 66 design.
• 8 mm creepage and clearance distances between coil and contacts.
• Faston 250 (6.3 × 0.8 mm) quick-connect terminals.
• Top-flange / chassis mounting.
• Non-latching relay operation.

24 V DC Power Switching for Industrial and Hazardous-Location Control Systems

The Finder 66.82.9.024.4003 operates through a 24 V DC electromagnetic coil that controls two mechanically linked changeover contacts. When the coil is energised, each common contact transfers from its normally closed connection to its normally open connection. Removing the coil supply allows the contacts to return to their normal positions, providing straightforward switching of two circuits through a common control signal.

The DPDT configuration offers greater switching flexibility than a relay equipped only with normally open contacts. It can support circuit selection, load control, electrical interlocking and control signalling. Because normally open and normally closed contacts may have different permissible current ratings, engineers should check the applicable switching specifications for each contact path.

The silver tin oxide contacts are intended for robust electrical switching, while the Series 66 reinforced insulation design provides separation between the low-voltage DC control circuit and the connected load circuits. The standard Series 66 relay family includes 30 A contact configurations, but the special version 3 is associated with a 25 A contact class. The standard 30 A rating must not automatically be applied to this special-version part number.

For installations involving potentially explosive atmospheres, relay selection requires more than checking the contact arrangement and coil voltage. The exact ATEX, IECEx or HazLoc approval, where applicable, must be checked alongside the required equipment protection level, gas group, temperature classification, enclosure design and electrical operating limits. The Finder 66.82.9.024.4003 should only be used in a classified area when its precise approval and installation requirements have been confirmed.

The flange-mounted housing and Faston 250 terminals allow direct wiring within suitable machinery and electrical equipment. This distinguishes the Finder 66.82 design from PCB-mounted Series 66.22 relays and makes it a practical choice for industrial assemblies where secure mounting and conventional wiring are preferred.

Typical Applications

• Industrial automation and machinery control systems.
• 24 V DC control circuits requiring power relay switching.
• Electrical control equipment for potentially hazardous environments, subject to certification.
• Industrial process control and monitoring systems.
• Electrical power management and switching assemblies.
• Industrial heating and ventilation control equipment.
• Manufacturing machinery and automated production equipment.
• Electrical control panels and industrial enclosures.
• Two-circuit changeover switching applications.
• OEM equipment requiring specialist relay configurations.
• Industrial electrical interlocking and control signalling.
• Specialised electrical equipment where approved hazardous-location components are required.