Siemens 3LD20842GP21 3-Pole Load Disconnect Switch, 25 A, 690 V AC, IP65 Front

Rated at 25 A and 690 V AC, this 3-pole switch disconnector handles up to 9.5 kW (AC-23A at 400 V) and features a red/yellow rotary mechanism with IP65 front protection.

Overview

The Siemens 3LD20842GP21 is a 3-pole load disconnect switch designed for reliable isolation and switching in industrial applications. It offers a rated operational current of 25 A and a rated operational voltage of 690 V AC, making it suitable for a wide range of low-voltage circuits.

What stands out

• High switching capacity: rated power of 9.5 kW at AC-23A, 400 V.
• Robust construction: IP65 protection on the front and IP20 on the rear.
• Integrated auxiliary contacts: 1 NO + 1 NC for status signaling.
• Long service life: 100,000 mechanical and electrical switching cycles.
• Wide operating temperature range: -25 °C to +55 °C.

Technical details

• Number of poles: 3
• Rated operational current (Ie): 25 A
• Rated operational voltage (Ue): 690 V AC
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Rated power (AC-23A at 400 V): 9.5 kW
• Rated short-circuit current (Icw): 1 kA (1 s)
• Rated short-circuit making capacity (Icm): 1 kA
• Power loss: 2.8 W
• Mounting type: front mounting, 4-hole mounting
• Operating mechanism: rotary, red/yellow
• Degree of protection: IP65 (front), IP20 (rear)
• Terminal type: box terminal
• Terminal cross-section: 1.5–16 mm²
• Electrical endurance: 100,000 cycles
• Mechanical endurance: 100,000 cycles
• Ambient operating temperature: -25 to +55 °C

Our verdict

A dependable switch disconnector with high ratings and long endurance, ideal for demanding industrial environments.