Siemens Switch disconnector, 3- pole, 11.5kW, 32A Part number 3LD2264-0TB53

Product Overview

The Siemens 3LD2264-0TB53 is a SENTRON 3LD switch disconnector used as an emergency switching-off switch for low-voltage installations. It is a 3-pole device with a rated operational current Iu of 32 A and an operating power of 11.5 kW at AC-23 A, 400 V. Housed in a molded-plastic encapsulation for metric cable glands and equipped with a red/yellow rotary operating mechanism and short rotary knob, it provides reliable manual disconnection and emergency shutdown capability with a high degree of protection (IP65) for industrial environments.

Key Features

• SENTRON 3LD switch disconnector for emergency switching-off
• 3-pole design for three-phase disconnection
• Rated operational current Iu: 32 A
• Operating power at AC-23 A, 400 V: 11.5 kW
• Molded-plastic encapsulation suitable for metric cable glands
• Rotary operating mechanism with short rotary knob, red/yellow for clear emergency stop identification
• High degree of protection: IP65 on the front and enclosure
• Mechanical service life typically 100 000 operating cycles
• Electrical endurance at AC-23 A, 690 V: approx. 6 000 operating cycles
• Conditional short-circuit current up to 50 kA with line-side gG fuse at 690 V

Technical Specifications

• Article Number: 3LD2264-0TB53
• Product Type: Switch disconnector / emergency switching-off switch
• Brand / Family: Siemens SENTRON 3LD
• Number of Poles: 3
• Size of Switch Disconnector: Size 2
• Rated Operational Current Iu: 32 A
• Operating Power at AC-23 A: 6 kW at 240 V, 11.5–12 kW at 400–690 V (as per datasheet)
• Utilization Categories: AC-21, AC-23 A
• Rated Insulation Voltage: 690 V
• Rated Surge Voltage Withstand: 6 kV
• Degree of Protection: IP65, NEMA 1 / 4X / 12 (front)
• Mechanical Service Life: approx. 100 000 operating cycles
• Max Operating Frequency: up to 50 switching operations per hour
• Suitable as: main switch, switch disconnector, EMERGENCY OFF switch, safety switch, maintenance/repair switch
• Short-circuit Protection: conditional short-circuit current 50 kA at 690 V with gG 40 A fuse
• Connection Type (main circuit): Box terminals for copper conductors 1.5–16 mm²

Compliance & Standards

• Designed as a manual switch disconnector and emergency switching-off device in accordance with low-voltage switchgear standards
• Meets Siemens SENTRON system requirements for main switch and safety switch applications
• UL/CSA ratings available for use as manual motor controller and disconnecting means according to applicable North American standards (per Siemens documentation)

Applications

The 3LD2264-0TB53 is ideal as a main isolator or emergency-stop switch for machinery, motor feeders, small distribution boards and industrial control panels. Its 3-pole design and 32 A rating make it suitable for three-phase loads requiring safe manual disconnection, while the red/yellow rotary handle, molded-plastic IP65 enclosure and high short-circuit capability ensure reliable operation in demanding industrial, commercial and utility environments.