The FUJI ELECTRIC SZ-HD is a versatile thermal overload relay base unit designed for seamless integration with electromagnetic switching systems. Ideal for industrial applications, this unit can be combined with the TK-E2 series thermal overload relays for enhanced motor protection. Featuring a 35mm DIN rail or panel mount adapter, the SZ-HD ensures reliable performance and easy installation in various motor control setups. Perfect for those seeking durable and efficient motor control solutions, this base unit is a key component in safeguarding motors against overload conditions.