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Description：

The Eaton 066401 EMT6-DB(230V) Thermistor Overload Relay is a reliable motor protection device designed for industrial machine protection applications. As part of the Eaton Moeller® EMT6 series, this thermistor overload relay monitors motor temperature through PTC thermistors and provides fast response to overheating conditions, helping prevent motor damage and unexpected downtime. The unit operates with a 230V AC supply at 50/60Hz and features manual or remote reset functionality, LED status indication, and an integrated test button for convenient operation and diagnostics. With IP20 protection, screw terminal connections, strong EMC resistance, and compliance with IEC/EN 60947 standards, the EMT6-DB relay is suitable for demanding industrial environments such as manufacturing, machinery control, pumps, compressors, and motor-driven systems. Its compact design, reliable switching performance, and wide operating temperature range make it an effective solution for safe and continuous motor protection.

Specification：

Frequently asked questions

Q1: What is the EATON EMT6-DB 066401 used for?

A1: It is used for motor and machine protection against overheating and thermistor overload conditions.

Q2: What is the EMT6-DB 066401 air discharge rating of the relay?

A2: The EMT6-DB 066401 air discharge rating is 8 kV.

Q3: What is the EMT6-DB 066401 pollution degree of the EMT6-DB relay?

A3: The EMT6-DB 066401 pollution degree is 3.

Q4: What is the EMT6-DB 066401 trip resistance value?

A4: The EMT6-DB 066401 trip resistance is 3600 Ω.

Q5: What is the EMT6-DB 066401 maximum voltage rating of the relay?

A5: The EMT6-DB 066401 maximum voltage rating is 600 V.

Product Applications

Motor and Machine Tool Protection: Monitors PTC thermistors embedded in the main motor windings to prevent winding burnout caused by heavy-load starting, frequent start-stop, stall, or under/overvoltage.

Bearing and Gearbox Monitoring: Used in the transmission systems of large mechanical equipment to monitor bearing and gearbox overheating and provide timely warnings of mechanical failures.

Pump and Cooling Systems: Widely used for temperature safety monitoring of coolants, lubricating oils, and various industrial fluid media.

Transformer and Generator Protection: Monitors the internal winding temperature of large generator sets and dry-type/oil-immersed transformers to prevent heat accumulation and accidents.