Eaton ETR4-51-A Relè temporizzatore stella-triangolo, 24-240V AC/DC, 3-60s, 2 CO, guida DIN 031884

The ETR4-51-A stands out as a star-delta timer relay that combines a wide 24–240 V AC/DC supply range with a fixed 50 ms transition time, making it a dependable choice for motor starting applications where precise switching is critical.

Highlights

• Star time adjustable from 3 to 60 seconds
• Fixed 50 ms transition time between star and delta
• Two change-over contacts rated at 3 A
• DIN rail mounting for quick installation

In daily use

This timer relay simplifies control panel wiring with screw terminals and an IP20 housing. Its wide supply voltage range allows use in various industrial environments without additional power conversion.

Full specifications

• Supply voltage: 24–240 V AC/DC
• Output: 2 change-over contacts (2 CO)
• Rated operational current: 3 A (AC-15, 230 V; DC-13, 24 V)
• Mounting: DIN rail (35 mm)
• Connection: Screw terminals
• Degree of protection: IP20
• Operating temperature: -25 to +60 °C
• Rated impulse withstand voltage: 4 kV
• Rated insulation voltage: 250 V
• Electrical life: 100,000 operations
• Mechanical life: 30 x 10^6 operations

Final note

With its robust construction and compliance with IEC/EN 61812-1, UL, and CSA standards, the ETR4-51-A is a reliable component for motor control circuits.