Bussmann ER12-40N3PR - 40A, Disconnect Switch

The Bussmann ER12-40N3PR is a 40A disconnect switch engineered for safe, reliable electrical isolation in demanding industrial and commercial environments. Designed to support proper lockout/tagout procedures, it delivers dependable disconnection under load, helping maintenance teams work with confidence and reduce downtime. Built for long-term durability, this model stands up to the rigors of everyday use in busy facilities.

Why the ER12-40N3PR stands out

• 40A amperage rating provides solid isolation for a wide range of control circuits, feeders, and equipment
• Lockout/tagout compatibility supports compliant, verifiable de-energization during servicing
• Reliable switching under load minimizes the risk of unexpected energization when personnel are working on equipment
• Rugged, durable construction designed to withstand the temperatures, dust, and vibration common in industrial settings
• Ease of integration fits into existing electrical systems and control panels without major redesigns

Ideal uses and scenarios

This disconnect switch is a practical choice for facilities that prioritize safety and uptime. Use it to isolate equipment during routine maintenance, repair work, or emergency shutdowns. It’s well suited for service panels in manufacturing lines, distribution rooms, and commercial plants where reliable isolation is essential for worker safety and process integrity.

What problems it solves

• Reduces the risk of accidental re-energization during maintenance through robust lockout/tagout support
• Provides a clear, verifiable means of de-energization even when circuits are actively loaded
• Extends equipment life by enabling safe, controlled disconnection without forcing downtime or improvisation

Technical snapshot

• Brand: Bussmann
• Product Type: Disconnect Switch
• Model: ER12-40N3PR
• Amperage Rating: 40A