ABB OTOT16G1-4BSN1Plus 4-Pole Load Disconnect Switch 16A

Panel builders and industrial electricians often need a robust, compact switch to safely isolate motor and feeder circuits. The ABB OTOT16G1-4BSN1Plus is a 4-pole load disconnect switch rated at 16 A, built for base mounting in distribution boards and control cabinets. It provides reliable manual isolation and switching under load, meeting IEC 60947-3 requirements.

Key specifications

• Switch type: Load disconnect switch (switch-disconnector)
• Number of poles: 4
• Rated operational current (Ie): 16 A (AC-21A/AC-22A/AC-23A at 400 V)
• Rated operational voltage (Ue): 690 V AC
• Rated insulation voltage (Ui): 750 V
• Rated impulse withstand voltage (Uimp): 8 kV
• Rated short-time withstand current (Icw): 0.5 kA for 1 s
• Rated conditional short-circuit current (Icc): 10 kA with 16 A gG fuse
• Terminal type: Screw terminals
• Terminal capacity: 1.5–6 mm² solid/stranded, 1.5–4 mm² fine-strand with ferrule
• Protection degree (terminals): IP20
• Operating temperature: -25 °C to +70 °C
• Storage temperature: -40 °C to +70 °C
• Electrical durability: 20,000 cycles
• Mechanical durability: 20,000 cycles
• Power loss per pole: 0.8 W
• Handle/shaft: Not included (switch body only)

Why choose it

This switch-disconnector offers dependable isolation with a high withstand rating and long service life. Its compact size and screw terminals simplify installation in tight spaces, while the IP20 terminal protection ensures safe operation in enclosures. The 4-pole design allows simultaneous disconnection of all phases and neutral, enhancing safety during maintenance.

Ideal use cases

• Isolation of motor circuits in industrial control panels
• Switching of resistive and inductive loads up to 16 A
• Manual disconnection in distribution boards for maintenance
• Use as a main switch in small machines or HVAC equipment

Good to know

The switch is supplied without a handle or shaft; a separate operating mechanism must be ordered to complete the installation. It is designed for base mounting and is suitable for use in ambient temperatures from -25 °C to +70 °C, making it versatile for various industrial environments.