Finder 6K.04.9.072.4809 – 6K Series Industrial contactors

Finder 6K.04.9.072.4809 – 9 A Industrial Contactor, 72 V DC Coil, 3 NO + 1 NO

The Finder 6K.04.9.072.4809 is a compact industrial electromagnetic contactor from the Finder 6K Series, designed for reliable three-phase motor control, electrical switching and industrial automation. Featuring a 72 V DC operating coil, three normally open main contacts and one normally open auxiliary contact, this contactor provides dependable power switching and integrated control functionality for industrial electrical systems.

With a rated operational current of 9 A AC-3 at 400 V AC and a corresponding 4 kW three-phase motor rating, the Finder 6K.04.9.072.4809 is suitable for appropriately rated motor starters, pumps, fans, conveyors and automated machinery. Its integrated normally open auxiliary contact supports holding circuits, contactor status indication and auxiliary control functions.

Designed for industrial control panels and machinery installations, this contactor combines 72 V DC electromagnetic operation, a modular construction and busbar-type main contact connections. Its AC-3 and AC-4 ratings support selection for different motor-switching applications, while its compact design makes it a practical component for industrial electrical control assemblies.

Key Advantages

• 72 V DC operating coil: Designed for industrial DC control circuits and automation equipment.
• 9 A AC-3 rated current: Supports three-phase motor switching at 400 V AC.
• 4 kW motor rating: Suitable for appropriately rated three-phase motors at 400 V AC.
• Three normally open main contacts: Enable simultaneous switching of three-phase electrical loads.
• One normally open auxiliary contact: Provides additional control, signalling and feedback functionality.
• Integrated auxiliary switching: Reduces the need for an additional contact block in straightforward control circuits.
• AC-3 and AC-4 utilisation ratings: Supports evaluation for different motor switching duties.
• Modular construction: Designed for integration into industrial electrical control assemblies.
• Busbar-type main contact connection: Supports electrical power connections according to the manufacturer's installation requirements.
• Electromagnetic operation: Provides controlled switching through an external DC control supply.
• Finder 6K Series design: Suitable for industrial motor control, machinery and electrical automation.

Key Features

• Finder 6K Series industrial electromagnetic contactor.
• Manufacturer part number 6K.04.9.072.4809.
• 72 V DC nominal control voltage.
• Three normally open main contacts for three-phase switching.
• One normally open auxiliary contact for control and signalling.
• 3 NO + 1 NO contact arrangement.
• 9 A AC-3 rated operational current at 400 V AC.
• 4 kW AC-3 motor power rating at 400 V AC.
• 9 A AC-4 rated operational current at 400 V AC.
• 4 kW AC-4 listed motor power rating at 400 V AC.
• Busbar-type main contact connections.
• Modular contactor version.
• Electromagnetic, non-latching switching operation.
• Suitable for appropriately designed motor starter assemblies.
• Designed for industrial electrical control and automation applications.

Reliable Three-Phase Motor Control with 72 V DC Operation

The Finder 6K.04.9.072.4809 uses an electromagnetic coil supplied with 72 V DC to operate its switching mechanism. When the coil is energised, the three normally open main contacts close, allowing electrical power to reach a connected three-phase load. At the same time, the normally open auxiliary contact closes, providing an additional electrical path for control or signalling.

When the control supply is removed, the electromagnetic mechanism releases and the main and auxiliary contacts return to their normally open positions. This operating principle makes the contactor suitable for conventional motor starters, automated machinery and electrical switching systems where the load must be controlled through an external signal.

The contactor has a 9 A AC-3 rating at 400 V AC, corresponding to a 4 kW three-phase motor rating. Product specifications also list 9 A and 4 kW under AC-4 conditions at 400 V AC. Actual suitability must be assessed against the motor characteristics, switching frequency, duty cycle and manufacturer's electrical endurance information.

Integrated Normally Open Auxiliary Contact

The 4809 configuration incorporates one normally open auxiliary contact in addition to the three normally open main contacts. This auxiliary contact closes when the contactor is energised and opens when the coil is de-energised.

The integrated auxiliary contact can be used in appropriately rated control circuits for holding circuits, operating status indication, auxiliary signalling and electrical interlocking. Its inclusion within the contactor assembly can simplify wiring and reduce additional component requirements in basic motor control installations.

Unlike the normally closed mirror-contact arrangement found on certain other Finder 6K.04 variants, the 6K.04.9.072.4809 provides a normally open auxiliary contact. This distinction is important when selecting the correct contactor for a particular electrical control schematic.

Typical Applications

• Three-phase industrial motor starting and stopping.
• 72 V DC industrial control circuits.
• Industrial automation and machinery control panels.
• Motor starter assemblies with suitable overload protection.
• Pumps and water handling systems.
• Fans and industrial ventilation equipment.
• Conveyors and material handling machinery.
• Heating, ventilation and air conditioning installations.
• Industrial processing and manufacturing equipment.
• Auxiliary holding circuits and contactor status signalling.
• Electrical distribution and OEM machinery control systems.

Installation and Motor Protection

The Finder 6K.04.9.072.4809 is designed for integration into suitable industrial electrical equipment and control enclosures. Its 72 V DC coil must be connected to an appropriately rated DC control supply, with the main and auxiliary connections wired according to the manufacturer's installation instructions.

For three-phase motor applications, the contactor should be combined with suitable thermal overload protection and upstream short-circuit protection. Protective equipment must be selected according to the motor nameplate current, starting characteristics, installation conditions and applicable coordination requirements.

The 9 A AC-3 rating applies to the specified motor-switching utilisation category and must not be treated as a universal current rating for every load type. Applications involving frequent reversing, plugging, jogging or other demanding operating conditions require assessment against the appropriate utilisation category and switching endurance requirements.