Siemens 3LD25550TK51 3-Pole Main Switch 63A 690V AC Rotary Handle Red/Yellow

In industrial power distribution, safely isolating a circuit under load is non-negotiable. The Siemens 3LD25550TK51 main switch provides a robust disconnect solution for three-phase systems, rated for 63 A at 690 V AC. Its red and yellow rotary handle offers clear visual status, while the 4-hole front mounting and IP65 front protection suit panel installations in demanding environments.

Who is it for

Panel builders and maintenance teams who need a reliable, manually operated disconnect switch for motor circuits, distribution boards, or machine control panels. The 3-pole design handles three-phase loads up to 22 kW at 400 V AC (AC-23A).

Main features

• 3-pole main switch with rotary handle
• Rated operational current: 63 A
• Rated operational voltage: 690 V AC
• Rated short-circuit making current: 1.26 kA
• Front mounting, 4-hole fixing
• Degree of protection: IP65 (front), IP20 (terminals)
• Operating temperature: -25 to +55 °C

Specifications

• Number of poles: 3
• Rated insulation voltage: 690 V
• Rated impulse withstand voltage: 6 kV
• Rated frequency: 50/60 Hz
• Operating mechanism: Rotary handle
• Handle colour: Red / Yellow
• Number of auxiliary contacts: 0 NO / 0 NC
• Standards: IEC 60947-3
• Width: 90 mm
• Depth: 132.5 mm
• Height: 107 mm

Tips

Verify the panel cut-out dimensions before installation. For dusty or wet environments, ensure the front seal is correctly fitted to maintain IP65 protection. The switch is suitable for use as a main disconnect in accordance with IEC 60947-3.