Siemens Switch disconnector, main switch, rotary, 3-pole, 16A Part number 3LD2054-0TK51

Product Overview

The Siemens 3LD2054-0TK51 is a 3-pole switch-disconnector (main-switch) from the SENTRON 3LD series. It serves as a manual isolator or main disconnect switch, providing a secure means to break supply to downstream circuits for maintenance, safety, or system isolation. Its compact design and robust construction make it suitable for control panels, distribution boards, and switchgear enclosures.

Key Features

• 3-pole switch-disconnector — ideal for three-phase load isolation
• Front-mounted rotary handle (black), with clear ON/OFF position indication (“1 / 0”)
• Compact 3LD series design — space-efficient for panel mounting
• Rated operational current: 16 A (at rated conditions)
• Rated insulation voltage: 690 V — suitable for typical low-voltage AC systems
• High surge-voltage resistance: 6 kV — robust against electrical transients
• Mechanical service life: ~100,000 switching cycles — reliable for frequent use
• Electrical endurance: up to 6,000 switching cycles under specified AC-23 A load conditions
• Protection class: IP65 (front) — dust- and water-jet resistant when installed correctly, suitable for demanding environments
• Can be used for main isolation, maintenance shut-off, or as a general circuit disconnect switch

Technical Specifications

• Article Number: 3LD2054-0TK51
• Product Type: 3-pole switch-disconnector (SENTRON 3LD series)
• Number of Poles: 3 (for 3-phase supply)
• Rated Operational Current (Iu): 16 A
• Rated Insulation Voltage: 690 V AC
• Surge Voltage Withstand: 6 kV
• Switching Duty / Use Category: Suitable for AC-21 / AC-23 A operations
• Mechanical Service Life: ~100,000 switching cycles
• Electrical Endurance: ~6,000 switching cycles (under AC-23 A, 690 V)
• Mounting / Operation: Front-mounted rotary handle, fixed installation
• Protection Class (front): IP65 — requires proper sealing and enclosure for full protection rating
• Use Cases: Main switch, maintenance isolation, safety isolation, circuit isolation in control cabinets / distribution boards

Compliance & Standards

• Engineered as part of the SENTRON 3LD switch-disconnector product range — adhering to industrial isolation and safety norms
• Rated for typical low-voltage 3-phase AC systems up to 690 V
• Designed for both front-panel installation and robust environmental protection when mounted correctly (IP65 front protection)

Applications

The 3LD2054-0TK51 is ideal for use as a main isolator or maintenance switch in distribution panels, machine control cabinets, or general switchgear. It can be used to manually disconnect power for maintenance, serve as a safety isolation point, or act as a general on/off switch for three-phase loads. Suitable for both industrial and commercial electrical installations.