Eaton EMT6-DBK Thermistor Motor Protection Relay, 24-240V AC/DC, 1NO+1NC 066168

Monitor PTC thermistors and protect motors from thermal overload with the Eaton EMT6-DBK, a thermistor motor protection relay that operates on a wide 24-240V AC/DC control voltage and offers both normally open and normally closed contacts for flexible integration.

Overview

The Eaton EMT6-DBK (066168) is a thermistor motor protection relay designed to monitor PTC thermistors embedded in motor windings. It provides reliable thermal overload protection by tripping when the thermistor resistance exceeds approximately 3.4 kΩ and automatically resetting when resistance falls to about 1.65 kΩ. The unit is suitable for DIN rail mounting and features screw terminals for secure wiring.

What stands out

• Wide control voltage range: 24-240V AC/DC for versatile applications.
• Dual contact configuration: 1 NO + 1 NC for alarm and control signaling.
• Automatic reset function simplifies operation after a trip event.
• LED indicator provides clear fault status at a glance.
• Supports up to 6 PTC thermistors in series for comprehensive motor protection.

Technical details

• Product type: Thermistor motor protection relay
• Control voltage: 24-240V AC/DC
• Contacts: 1 NO + 1 NC
• Rated operational current: 3 A (AC-15, 230V), 1 A (DC-13, 24V)
• Mounting: DIN rail (EN 60715)
• Protection degree: IP40 (housing), IP20 (terminals)
• Ambient operating temperature: -25°C to +60°C
• Response resistance: trip approx. 3.4 kΩ, reset approx. 1.65 kΩ
• Terminal type: screw terminals
• Rated impulse withstand voltage: 4000 V

Our verdict

A robust and versatile motor protection relay that combines wide voltage compatibility with essential monitoring features, making it a dependable choice for industrial motor control applications.