Siemens Switch disconnector, red/yellow, 3-pole,37kW Part number 3LD2704-0TK53

Product Overview

Siemens 3LD2704-0TK53 is a SENTRON series 3-pole switch disconnector and emergency-off switch designed for safe electrical isolation and emergency power cut-off in industrial installations. It provides robust manual control for disconnecting three-phase main circuits up to 100 A, with a front-mounted rotary handle in red/yellow for quick operation. The device is suitable as a main switch, safety switch, maintenance/repair switch and emergency stop switch, supporting secure disconnection of power in control panels and machinery systems.

Key Features

• SENTRON 3-pole switch disconnector with emergency-off capability
• Rated current: 100 A
• Front-mounted rotary operating mechanism with red/yellow handle
• Designed for manual ON/OFF operation
• Can be locked in the OFF position for safety during maintenance
• IP65 protection for front side, dust-tight and water resistant
• Suitable for use as main switch, safety switch and emergency stop switch
• Robust industrial design with 4-hole front mounting

Technical Specifications

• Article Number: 3LD2704-0TK53
• Product Family: SENTRON 3LD switch disconnectors
• Device Type: Switch disconnector / emergency stop switch
• Number of Poles: 3
• Rated Operational Current (Iu): 100 A
• Rated Insulation Voltage (Ui): 690 V
• Surge Withstand Voltage: 6 kV
• Rated Operational Voltage: 690 V AC, 50/60 Hz
• Operating Power (AC-23, 400 V): 37 kW
• Operating Power (AC-3, 400 V): 30 kW
• Main Circuit Connections: Box terminals
• Connectable Conductor Cross-Section: 4 … 50 mm² (solid/stranded)
• Mechanical Service Life: approx. 100 000 switching cycles
• Electrical Endurance (AC-23 at 690 V): approx. 6 000 cycles
• Operating Frequency: max. 50 operations/hour
• Protection Rating (front): IP65
• Protection Class: NEMA 1, 3R, 4X, 12
• Mounting Type: Front-mounted with 4-hole attachment
• Height: 107 mm
• Width: 90 mm
• Depth: 112.5 mm
• Net Weight (approx.): ~0.50 kg
• Operating Temperature Range: –25 °C to +55 °C
• Storage Temperature Range: –25 °C to +55 °C
• Auxiliary Contacts: None included (0 NO/NC)
• Locking Feature: Can be locked in OFF position

Compliance & Certifications

• Manufactured to Siemens SENTRON industrial standards
• Designed and tested for industrial safety switching applications

Applications

The Siemens 3LD2704-0TK53 switch disconnector is used for manual disconnection and emergency stop functions in electrical distribution systems, industrial control panels and machinery. It provides safe isolation of three-phase power circuits, supports emergency power cutoff and enables secure maintenance conditions by locking in the OFF position.