Siemens Sentron Switch disconnector, 3-pole, 400V, 100A Part number 3LD2704-0TK51

Product Overview

The Siemens 3LD2704-0TK51 is a 3-pole switch-disconnector from the SENTRON 3LD series, designed for front-panel mounting with a rotary knob. It is rated for 100 A operational current, supports use as a main switch or safety switch and offers high performance in industrial power distribution systems with a rated power of 37 kW at 400 V AC-23.

Key Features

• 3-pole switch-disconnector (size 4) for fixed mounting
• Rated continuous current (Ie) up to 100 A
• Rated operating power up to 37 kW at 400 V (AC-23) and up to 30 kW at 690 V
• Rated insulation voltage: 690 V; surge withstanding: 6 kV
• Lockable in OFF position for safe maintenance isolation
• Protection rating: front IP65 — suitable for harsh industrial environments
• Designed for front-panel, 4-hole handle mounting with short rotary knob

Technical Specifications

• Article Number: 3LD2704-0TK51
• Series: SENTRON 3LD
• Number of Poles: 3
• Rated Continuous Current (Ie): 100 A
• Rated Operating Power: 37 kW at 400 V (AC-23); 30 kW at 690 V
• Rated Insulation Voltage (Ui): 690 V
• Surge Withstand Voltage (Uimp): 6 kV
• Mechanical Service Life: ~100,000 switching operations
• Mounting Type: Fixed built-in, front panel, 4-hole handle
• Dimensions (approx): Width 90 mm × Height 107 mm × Depth 112.5 mm

Compliance & Certifications

• Designed according to IEC/EN low-voltage switchgear standards
• Rated for use as main switch, switch-disconnector or safety switch

Applications

Ideal for use in industrial switchboards, machine-tool power panels, and main distribution cabinets where reliable disconnection and high performance are required. The 3LD2704-0TK51 is well suited for large power feeders, maintenance isolation and applications demanding high continuous current and rated power.