Eaton ZB65-40 Motor Protection Relay 24-40A 1NO+1NC

In a busy industrial control panel, a maintenance technician needs to protect a three-phase motor from overloads and phase failures. The Eaton ZB65-40 motor protection relay provides reliable thermal overload protection for motors with a current setting range of 24 to 40 A. Its compact design allows direct mounting onto Eaton DILM contactors, saving space and wiring time.

Key specifications

• Current setting range: 24 - 40 A
• Contact configuration: 1 NO + 1 NC auxiliary contacts
• Trip class: 10A
• Overload release type: Thermal
• Phase failure sensitivity: Yes
• Reset function: Manual/Automatic
• Mounting: Direct to contactor or stand-alone
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Degree of protection: IP20 (terminals)
• Ambient operating temperature: -25 to +55 °C
• Standards compliance: IEC/EN 60947-4-1
• Connection type: Screw terminals
• Auxiliary contact rated operational current (AC-15, 230V): 1.5 A
• Auxiliary contact rated operational current (DC-13, 220V): 0.5 A
• Suitable for contactor series: Eaton DILM

Why choose it

The ZB65-40 ensures motor longevity by precisely detecting overloads and phase failures. Its thermal release mechanism reacts to actual motor heating, providing accurate protection. The manual/automatic reset option offers flexibility in different operational setups. Direct mounting on DILM contactors streamlines installation and reduces panel footprint.

Ideal use cases

• Protecting three-phase motors in industrial machinery
• Motor control centers (MCCs) requiring reliable overload protection
• Pumps, fans, and conveyors with motors rated 24-40 A
• Applications where space-saving direct-to-contactor mounting is preferred

Good to know

The relay is compliant with IEC/EN 60947-4-1, ensuring international safety and performance standards. Its IP20 terminal protection is suitable for installation in enclosed panels. The wide operating temperature range allows use in harsh environments. For optimal performance, pair with Eaton DILM contactors of corresponding ratings.