Siemens Switch disconnector, emergency switch-off, 4-pole, 11.5kW Part number 3LD2203-1TL53

Product Overview

The Siemens 3LD2203-1TL53 is a SENTRON 3LD switch disconnector designed for safe isolation and emergency switching-off in low-voltage electrical installations. It is a 4-pole device with a rated operational current of 32 A and provides reliable manual disconnection for three-phase circuits including the neutral conductor. With a front-mounted red/yellow rotary operating mechanism, molded-plastic enclosure, and IP65 protection, it offers high safety performance for industrial, commercial, and utility environments.

Key Features

• SENTRON 3LD switch disconnector for emergency switching-off and safe isolation
• 4-pole design for full disconnection of three-phase systems including neutral
• Rated operational current: 32 A
• Operating power at AC-23 A (400 V): approx. 11.5 kW
• Front-mounted rotary operating mechanism with short red/yellow knob for emergency use
• Lockable in the OFF position for maintenance and safety lockout
• High protection class: IP65 — dust-tight and capable of withstanding water jets
• Mechanical service life approx. 100,000 operating cycles
• Suitable as main switch, maintenance/repair switch, and emergency-off switch

Technical Specifications

• Article Number: 3LD2203-1TL53
• Product Family: SENTRON 3LD
• Type: Switch disconnector / emergency switching-off switch
• Number of Poles: 4
• Rated Operational Current: 32 A
• Operating Power (AC-23 A): 6 kW at 240 V / 11.5 kW at 400 V
• Rated Insulation Voltage: 690 V
• Rated Surge Voltage Withstand: 6 kV
• Protection Class: IP65
• Electrical Endurance: approx. 6,000 operating cycles (AC-23 A)
• Mechanical Endurance: approx. 100,000 operating cycles
• Mounting: Front-mounted with four-hole fastening
• Connection Type: Box terminals for main circuit
• Dimensions (approx): 83 mm (H) × 67 mm (W) × 92.5 mm (D)
• Ambient Operating Temperature: −25 °C to +55 °C

Compliance & Standards

• Designed according to Siemens SENTRON standards for isolation switches
• Meets industrial safety requirements for emergency switching-off devices
• Suitable for global low-voltage installations in commercial and industrial applications

Applications

The Siemens 3LD2203-1TL53 is ideal for use as a main isolator or emergency-off switch for machinery, motor control systems, distribution boards, HVAC units, and general industrial electrical installations. Its 4-pole configuration ensures complete disconnection of all conductors, making it suitable for maintenance safety, machine servicing, and emergency shutdown scenarios in harsh or safety-critical environments.