Fuji Electric TK-E3-1800 Thermal Overload Relay

Fuji Electric TK-E3-1800 Thermal Overload Relay is a motor protection device from Fuji Electric’s TK-E3 series, specifically rated for 12–18 A. The TK-E3-1800 designation (also listed as TKE31800) identifies this variant intended for protection within that current range. In motor control circuits, this relay provides a dedicated thermal overload function for motors by monitoring current levels in the 12–18 A window and triggering protective action to help prevent damage from overload conditions. Designed for industrial automation environments, it is commonly used in control panels alongside appropriate motor starters to safeguard motors during startup and operation. The TK-E3-1800 offers a verified, mid-range protection option from Fuji Electric when precise overload protection is required for equipment with moderate current draw, making it a suitable choice for engineers specifying a reliable, brand-specific relay within the 12–18 A range.