EATON ZB32-10 Thermal Overload Relay 6.3-10 A 690 V AC Motor Protection for DILM17-DILM32

Protecting motors from overload and phase failure is essential for reliable operations. The EATON ZB32-10 thermal overload relay is engineered for direct mounting onto DILM17, DILM25 and DILM32 contactors, delivering precise protection within a 6.3 to 10 A setting range. With trip class 10A and a temperature-compensated design, it reacts quickly and dependably even in demanding environments.

Highlights

• Current setting range 6.3 - 10 A with easy-to-read scale
• Trip class 10A for fast protection without nuisance tripping
• 3-pole thermal overload detection, sensitive to phase failure
• Auxiliary contacts: 1 normally open (NO) + 1 normally closed (NC)
• Direct mounting to Eaton DILM17, DILM25, DILM32 contactors
• Manual or automatic reset, selectable via a switch
• Rated operational voltage 690 V AC; insulation voltage 690 V AC
• Impulse withstand voltage 6 kV per IEC/EN 60947
• Temperature compensation from -25 °C to +55 °C
• IP20 protection, screw terminals for secure wiring

In daily use

Installation is straightforward: the relay clips straight onto the contactor, eliminating separate mounting hardware. Rotate the dial to set the full-load current of your motor. During operation, the relay continuously measures thermal load and trips the contactor when an overload occurs. The integrated phase-failure sensor adds an extra layer of safety. The selectable reset mode lets you choose between manual acknowledgement after a fault or automatic reset for remote operation.

Full specifications

• Product type: Thermal overload relay
• Setting range: 6.3 - 10 A
• Trip class: Class 10A
• Number of poles: 3
• Auxiliary contacts: 1 NO + 1 NC
• Compatibility: Eaton DILM17, DILM25, DILM32
• Mounting: Direct to contactor
• Rated operational voltage (Ue): 690 V AC
• Rated insulation voltage (Ui): 690 V AC
• Rated impulse withstand voltage (Uimp): 6 kV
• Temperature compensation: -25 to +55 °C
• Reset function: Manual/Automatic selectable
• Degree of protection: IP20
• Phase failure sensitivity: Yes
• Terminal type: Screw terminals
• Standards: IEC/EN 60947-4-1, IEC/EN 60947-5-1

Final note

The EATON ZB32-10 (part number 278451) is a genuine Eaton component for motor starter applications. Always verify that the setting range matches the motor full-load current before installation. This relay is not a direct replacement for older ZB32-6 or other models without checking compatibility.