ABB OTOT25G1-4MSN2Plus 25 A 4-Pole Load Disconnect Switch, Panel Mount, IP65 Front, 8 kV Impulse Withstand

With a rated impulse withstand voltage of 8 kV, the ABB OTOT25G1-4MSN2Plus load disconnect switch delivers exceptional surge protection for demanding industrial environments. This 4-pole switch is rated for 25 A operational current (AC-21A, 400V) and supports voltages up to 750 V AC or 250 V DC, making it a versatile solution for safe isolation and switching of electrical circuits.

Overview

The OTOT25G1-4MSN2Plus belongs to ABB's OT series of load disconnect switches, designed for reliable performance in panel-mounted applications. Its compact G1 frame size and front-operated black handle allow for easy integration into control panels and distribution boards. The switch meets IEC 60947-3 standards, ensuring compliance with international safety and performance requirements.

What stands out

• High impulse withstand voltage (8 kV) for robust surge protection
• Wide operating temperature range from -25°C to +70°C
• IP65 protection on the front face, suitable for harsh environments
• Excellent mechanical durability of 15,000 cycles
• Versatile terminal capacity: 1.5–16 mm² solid/stranded, 1.5–10 mm² fine-strand with ferrule

Technical details

• Rated operational current (Ie): 25 A (AC-21A, 400V)
• Number of poles: 4
• Rated operational voltage: 750 V AC / 250 V DC
• Rated short-time withstand current (Icw): 1 kA (1s)
• Rated short-circuit making capacity (Icm): 2.5 kA
• Rated frequency: 50/60 Hz
• Mounting type: Panel mounting (front)
• Actuator type: Direct operated handle (black)
• Degree of protection: IP65 (front), IP20 (terminals)
• Terminal type: Screw terminals
• Electrical durability: 2000 cycles (AC-23A, 400V)
• Mechanical durability: 15000 cycles
• Standards: IEC 60947-3
• Ambient operating temperature: -25 to +70 °C
• Pollution degree: 3
• Frame size: G1

Our verdict

The ABB OTOT25G1-4MSN2Plus is a robust and reliable load disconnect switch that excels in harsh industrial environments. Its high surge protection, wide temperature range, and IP65 front seal make it an excellent choice for panel builders and maintenance professionals seeking durable isolation and switching performance.