Siemens Load disconnector 3LD3, red/yellow, 3-pole, 63A, 22.0kW Part number 3LD3440-0TK13

Product Overview

The Siemens 3LD3440-0TK13 is a 3-pole load-disconnector switch from the 3LD3 series. It has a rated operational current of 63 A and is designed for use as a main switch, switch-disconnector or safety switch in industrial installations.

Key Features

• 3-pole design for three-phase applications
• Rated current Iu = 63 A
• Rated operating power up to 22 kW at 400 V (AC-23A) for the AC-23A utilization category
• Selectable red/yellow toggle drive for ON/OFF operation
• Lockable in the OFF position for safety and maintenance
• Protection rating front: IP65, suitable for industrial environments
• Built to fulfill functions of main switch, switch-disconnector, emergency-off switch, safety switch and maintenance/repair switch

Technical Specifications

• Article Number: 3LD3440-0TK13
• Series: Siemens 3LD3 Load Disconnector Series
• Rated Operational Current (Iu): 63 A (at AC-21 utilisation category)
• Rated Operating Power: Up to 22 kW at 400 V (AC-23A category)
• Rated Insulation Voltage (Ui): 690 V
• Surge Voltage Resistance: 6 kV
• Poles: 3
• Protection Rating (Front): IP65
• Short-Circuit Protection Device Required: gL/gG fuse 63 A

Compliance & Certifications

• Manufactured to Siemens industrial switchgear standards
• Complies with low-voltage switchgear requirements (e.g., IEC/EN standards for switch-disconnectors)
• Designed for harsh industrial environments thanks to high protection class and durability

Applications

This load-disconnector is used as a main switch, emergency-off switch, or safety switch in industrial installations, switch-rooms, machine control panels and power distribution systems. Its 63 A rating and high ingress protection make it suitable for low-voltage power distribution in manufacturing, automation, and infrastructure switchgear assemblies.