ABB 250K3 - 250A, Disconnect Switch

ABB 250K3 is a robust 250 A disconnect switch designed for industrial and commercial environments that demand safe electrical isolation and dependable performance when it matters most.

With a focus on reliable lockout/tagout (LOTO) procedures and disconnection under load, the 250K3 is built to keep maintenance crews and equipment safe during servicing and routine power-downs. Its sturdy construction supports long-term durability in demanding electrical installations.

Key benefits and standout features

• 250A continuous rating provides a solid service disconnect for feeders, motors, and panels, reducing the need for multiple smaller switches.
• LOTO-ready design accommodates standard padlocks and tagging devices, helping facilities stay compliant with safety standards during maintenance.
• Safe isolation under load capability means equipment can be safely isolated without waiting for a complete shutdown, minimizing downtime.
• Industrial-grade reliability and rugged construction designed for frequent operation in harsh environments.
• Brand trust with ABB backing, supported by engineering quality and global service for installation, integration, and maintenance needs.

Ideal applications

Designed for environments where reliable, immediate disconnection is essential:

• Industrial plants and manufacturing lines requiring fast, secure power isolation
• Commercial facilities with critical equipment that must be safely serviced without compromising overall system integrity
• Electrical rooms and switchgear where a dedicated service disconnect improves safety and control
• Maintenance and testing scenarios that rely on strict lockout/tagout procedures

How it integrates into your system

The ABB 250K3 is a purpose-built disconnect switch that complements existing panelboards and switchgear. Its straightforward wiring and accessible design support quick installation and clear operational control, helping technicians verify isolation quickly during audits and safety inspections.

Tips for best results

• Plan your LOTO workflow around the 250K3’s location and labeling so technicians can reliably identify the service disconnect during routine checks.
• Match wiring gauge and enclosure ratings to your installation to ensure safe clearance, insulation, and heat dissipation.
• Schedule periodic inspections of the mechanical handle, contacts, and enclosure seals to preserve reliability over time.

Technical snapshot

• Amperage rating: 250 A
• Product type: Disconnect Switch
• Brand: ABB
• Model: 250K3