Square D TeSys Deca Thermal Overload Relay, 12 to 18A, Class 10A

Square D TeSys Deca Thermal Overload Relay — 12 to 18A, Class 10A (Model LRD21)

The Square D TeSys Deca LRD21 is a Class 10A differential thermal overload relay with an adjustable range of 12.0 to 18.0A. Rated up to 600V AC with phase unbalance protection and screw clamp terminals, it is designed for direct mounting to TeSys D contactors to provide comprehensive motor protection in mid-range motor applications.

Key Features

• Adjustable thermal range: 12.0 to 18.0A
• Trip Class 10A for standard motor protection
• Phase unbalance protection
• Rated up to 600V AC
• Screw clamp terminal connections
• Differential trip for accurate overload detection
• Direct mount to TeSys D contactors

Specifications

• Manufacturer: Square D (Schneider Electric)
• Series: TeSys Deca
• Model: LRD21
• UPC: 78590120679
• Type: Differential Thermal Overload Relay
• Adjustment Range: 12.0 to 18.0A
• Trip Class: 10A
• Voltage Rating: Up to 600V AC
• Phase Unbalance Protection: Yes
• Connection Type: Screw Clamp Terminals
• Standards: EN/IEC 60947-4-1, EN/IEC 60947-5-1, UL 60947-4-1, UL 60947-5-1, CSA C22.2 No 60947-4-1, CSA C22.2 No 60947-5-1, GB/T 14048.4, GB/T 14048.5, EN 50495

Applications

Designed for protecting 3-phase motors in the 12 to 18A range from overload and phase unbalance conditions. Used in motor control centers, industrial machinery, and HVAC equipment starters. Direct contactor mounting pairs with TeSys D series contactors for a compact, complete motor starter assembly.