Schneider Electric Mechanical Interlock & Surge Suppression Modules
Models: LAD4CM, LAD4RCU, LAD9R1V, LA9D09978C, LA4DA2U, LAD9R1, LAD4VU, LAD9V2
Product Overview
Schneider Electric's LAD series interlock and surge suppression modules provide critical protection and control functions for industrial electrical systems. This range includes:
Mechanical interlocks for contactor safety
Surge suppression modules for voltage spike protection
Auxiliary contact blocks for system expansion
Key Features by Category
1. Mechanical Interlocks (LAD4CM, LA9D09978C, LA4DA2U)
✔ Prevents simultaneous operation of multiple contactors
✔ Forced break-before-make operation for safety compliance
✔ Durable construction with >1 million mechanical operations
✔ Universal mounting for TeSys D/K contactors
2. Surge Suppression Modules (LAD4RCU, LAD9R1V, LAD9R1, LAD4VU, LAD9V2)
✔ Protects coils from voltage spikes (up to 1.5kV)
✔ Extends contactor life by reducing arcing
✔ Multiple voltage options: 24V DC to 600V AC
✔ Compact design for space-saving installation
Technical Specifications
Model Type Voltage Rating Current Rating Application
LAD4CM Mechanical Interlock N/A N/A Contactor safety
LAD4RCU RC Surge Suppressor 24-600V AC/DC 3A Coil protection
LAD9R1V Varistor Suppressor 120-240V AC 5A Motor controls
LA9D09978C Dual Interlock N/A N/A Reversing contactors
LA4DA2U Auxiliary + Interlock 250V AC 6A Multi-function applications
LAD4VU Voltage Suppressor 24-240V AC/DC 2A Sensitive electronics
Typical Applications
🔹 Motor Control Centers - Safe operation of reversing starters
🔹 PLC Systems - Protection from voltage transients
🔹 HVAC Equipment - Extending contactor lifespan
🔹 Industrial Automation - Preventing accidental energization
Installation & Compatibility
✔ Easy snap-on mounting for TeSys contactors
✔ Color-coded terminals for quick wiring
✔ Universal compatibility with Schneider contactor families
