The Schneider Electric LA9D09978 is an interlock device designed for use with specific Schneider Electric contactor series, typically within the 9 to 25 Ampere frame size range. This accessory ensures safe operation by preventing simultaneous energization of opposing circuits, commonly found in motor control and power distribution applications.

Technical details

• Product Type: Contactor Interlock Accessory
• Manufacturer Series Compatibility: Designed for Schneider Electric contactors within the 9-25A frame size range. Specific contactor series compatibility should be verified against manufacturer documentation.
• Function: Mechanical interlock to prevent simultaneous closing of two contactors.
• Mounting Type: Side-mounted accessory for direct attachment to compatible contactor units.
• Operating Principle: Prevents the mechanical actuation of one contactor if the other is already closed or in the process of closing.
• Environmental Rating: Standard industrial environmental specifications apply; consult datasheet for precise ratings.
• Material: Durable industrial-grade plastic construction for longevity in demanding environments.

Applications & compatibility

This interlock is essential for applications requiring fail-safe operation, such as reversing motor starters, dual-power source switching, or any system where two contactors must not be energized concurrently. It is commonly integrated into control panels for machinery in the food and beverage processing, material handling, and HVAC industries.

Available from Industrial Automation Co as new, refurbished, or surplus stock, backed by a 2-year warranty with same-day shipping on in-stock items. Request a quote for the LA9D09978 or contact our technical team for cross-reference assistance with compatible Schneider Electric control components.