Siemens Switch disconnector, emergency switch off, 11.5kW Part number 3LD2203-0TK53

Product Overview

Siemens SENTRON switch disconnector (3LD2203-0TK53) is an emergency switching-off switch designed for safe load switching and reliable isolation in low-voltage industrial installations. This 3-pole, front-mounted switch disconnector features a rotary operating mechanism with a short rotary knob and a highly visible red/yellow handle, making it well suited for main switching, maintenance isolation and emergency OFF functions in control panels and machinery.

Key Features

• Emergency switching-off switch disconnector (SENTRON 3LD series)
• 3-pole, front-mounted switch disconnector (Size 2)
• Rotary operating mechanism with short rotary knob
• Handle/actuator colour: Red/yellow handle with red actuating element
• Lockable in OFF position (suitable for maintenance isolation procedures)
• 4-hole front mounting of the handle
• High mechanical service life for frequent switching operations
• Front protection: IP65 (suitable for panel door mounting environments)

Technical Specifications

• Article Number: 3LD2203-0TK53
• Brand / Product Family: SENTRON, 3LD switch disconnectors
• Product Type: Switch disconnector (Emergency switching-off switch)
• Number of Poles: 3
• Mounting / Design: Front-mounted, fixed mounting, 4-hole front mounting (handle)
• Switch Position Indicator: Manual operation, 1 ON – 0 OFF
• Actuating Element: Short rotary knob
• Actuating Element Colour: Red
• Handle Design / Colour: Rotary operating mechanism, red/yellow
• Rated Insulation Voltage (Ui): 690 V
• Rated Surge Voltage Withstand (Uimp): 6 kV
• Rated Operating Voltage (AC): 690 V
• Rated Frequency: 50–60 Hz
• Rated Current (AC-21): 32 A (at 400 V / 690 V)
• Rated Current (AC-23A): 22 A (at 400 V)
• Operating Power (AC-23A): 12 kW (at 400 V) / 11.5 kW (at 440 V)
• Operating Power (AC-3): 10 kW (at 400 V) / 9.5 kW (at 690 V)
• Mechanical Service Life (typical): 100,000 operating cycles
• Electrical Endurance: 6,000 operating cycles (AC-23A at 690 V)
• Maximum Operating Frequency: 50 operations/hour
• Protection Rating: IP65 (front), NEMA 1, 3R, 4X, 12
• Power Loss (per pole): 1.8 W
• Ambient Temperature (operation): -25 °C to +55 °C
• Dimensions (H × W × D): 83 mm × 67 mm × 93 mm
• Net Weight (approx.): 202 g

Compliance & Certifications

• Designed and manufactured to Siemens SENTRON low-voltage switching standards
• Suitable for use as: main switch, switch disconnector, EMERGENCY OFF switch, safety switch, and maintenance/repair switch
• IP65 front protection supports robust panel door applications
• RoHS compliant (Siemens product compliance)

Applications

The Siemens 3LD2203-0TK53 is used in industrial control panels, machinery switchboards and low-voltage distribution systems where a clearly identifiable emergency OFF switch and dependable isolation are required. Typical uses include main incoming isolation on small distribution panels, machine maintenance isolation points, and emergency switching-off functions on equipment skids and automation cabinets.