Siemens SENTRON 3LD3 Load Disconnector 25A 3-Pole Rotary Switch 3LD3154-0TK53

The Siemens 3LD31540TK53 (3LD3154-0TK53) is a high-quality load disconnector from the SENTRON 3LD3 series, designed for reliable switching and isolation of electrical circuits. With a rated operational current of 25 A and a voltage rating of 690 V AC, this 3-pole main switch is ideal for industrial applications requiring safe disconnection under load.

Advantages

Robust rotary operating mechanism ensures long mechanical endurance of 100,000 switching cycles. Front mounting with IP65 protection on the front face provides dust and water ingress protection, making it suitable for harsh environments. Compact design with low power loss of 2.1 W.

Suitable for

• Industrial control panels
• Machine tools
• Distribution boards
• Main switch applications in commercial and industrial installations

Key specifications

• Series: SENTRON 3LD3
• Product Type: Load Disconnector / Main Switch
• Number of Poles: 3-pole
• Rated Operational Current (Iu): 25 A
• Rated Operational Voltage (Ue): 690 V AC
• Rated Insulation Voltage (Ui): 690 V
• Rated Impulse Withstand Voltage (Uimp): 6 kV
• Rated Short-Time Withstand Current (Icw): 0.5 kA (1s)
• Rated Conditional Short-Circuit Current (Iq): 50 kA (with 50A fuse)
• Operating Mechanism: Rotary operating mechanism
• Handle Type: Black, 65x65 mm
• Mounting Type: Front mounting
• Degree of Protection (Front): IP65
• Degree of Protection (Terminals): IP20
• Electrical Endurance: 10,000 switching cycles
• Mechanical Endurance: 100,000 switching cycles
• Power Loss: 2.1 W
• Ambient Temperature (Operation): -25 to +55 °C
• Ambient Temperature (Storage): -40 to +80 °C
• Standards: IEC 60947-3, VDE 0660 Part 107

Recommendations

For optimal performance, use with appropriate fuses or circuit breakers. Ensure proper mounting and wiring according to manufacturer guidelines.