TECO Electric & Machinery RHU-10 4A1 Overload Relay

Description:

The TECO Electric & Machinery RHU-10 4A1 Overload Relay is used to protect three-phase electric motors from overload and phase failure conditions in industrial motor control systems. Commonly installed in motor starters, pump control panels, conveyors, compressors, HVAC equipment, machine tools, and industrial automation systems requiring dependable thermal overload protection. Maintenance teams and system integrators use this part for repair, retrofit, expansion, or replacement of industrial motor protection systems.

Applications:

The TECO Electric & Machinery RHU-10 4A1 is a thermal overload relay from the RHU series designed to operate with TECO magnetic contactors and motor starters. It provides adjustable motor overload protection, phase-loss protection, automatic temperature compensation, and manual or automatic reset functionality to help prevent motor damage caused by excessive current. The relay is widely used in manufacturing facilities, HVAC systems, water and wastewater treatment plants, conveyors, compressors, pumps, elevators, and industrial automation equipment. 

Technical Specifications:

• Manufacturer: TECO Electric & Machinery Co., Ltd.
• Manufacturer Part Number (MPN): RHU-10 4A1
• Product Type: Thermal Overload Relay
• Relay Series: RHU-10
• Protection Type: Thermal Overload and Phase Failure Protection (A Type)
• Rated Current Setting: 4 A
• Compatible Contactor Series: TECO CU-11, CU-18, CU-25, CU-32R Magnetic Contactors
• Rated Frequency: 50/60 Hz
• Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)
• Reset Function: Manual or Automatic Reset Selectable
• Test Function: Integrated STOP / TEST Button
• Temperature Compensation: Automatic Ambient Temperature Compensation
• Terminal Protection: IP20 Finger-Safe Terminal Cover
• Mounting Style: Direct Contactor Mount or Independent Base Mount
• Standards: UL, CSA, TÜV, cRUus, cULus Certified
• Applications: Motor starters, pumps, compressors, conveyors, HVAC equipment, elevators, cranes, refrigeration equipment, and industrial motor protection circuits.

Common Replacements:

• TECO RHU-10 4K1
• TECO RHU-10 4M1
• TECO RHN-180 4A1