Bussmann RD40-3-508 - 40A, 600V, Disconnect Switch

The Bussmann RD40-3-508 Disconnect Switch is built for safety, reliability, and long-term durability in demanding industrial and commercial environments. With a 40A amperage rating and a 600V voltage rating, it provides solid electrical isolation when you need to service, maintain, or isolate equipment without compromising safety or uptime. Key advantages

• Lockout/tagout ready: Designed to support proper lockout/tagout procedures, helping you meet safety standards during maintenance and regulatory inspections.
• dependable disconnection under load: Engineered to interrupt power cleanly and reliably, reducing the risk of arcing or unintended energization while work is in progress.
• Industrial-grade durability: Built to withstand demanding environments and frequent operation, delivering long-term performance in panels, switchgear, and equipment enclosures.
• Clear specification alignment: 40A current capacity paired with a 600V rating makes it suitable for a wide range of medium-duty circuits in commercial buildings, manufacturing floors, and utility spaces.

Specifications at a glance

• Amperage Rating: 40A
• Voltage Rating: 600V
• Product Type: Disconnect Switch
• Brand: Bussmann
• Model: RD40-3-508

Ideal for

• Facilities managers overseeing electrical rooms in manufacturing plants, warehouses, and large commercial facilities
• Electrical contractors performing safe service disconnections during maintenance or panel work
• Systems that require regular isolation of equipment for testing, calibration, or periodical servicing

Practical use and best practices

• Pair with a compliant lock and tag to enforce lockout/tagout procedures and prevent inadvertent energization.
• Use in panels or switchgear where a dedicated disconnect is needed to provide a visible, physical isolation point.
• Verify isolation with a proper testing instrument before beginning any maintenance, aligning with site safety protocols and electrical codes.
• Plan for future maintenance cycles by selecting a switch with durable construction that stands up to repeated operation in busy utility or production spaces.

Why the RD40-3-508 stands out This disconnect switch from Bussmann is purpose-built to deliver reliable isolation where it matters most—during maintenance windows, safety lockouts, and routine servicing—while standing up to the rigors of commercial and industrial environments. Its combination of a solid 40A rating, 600V capability, and lockout-friendly design makes it a pragmatic, code-conscious choice for teams that value safety, reliability, and uninterrupted operations. Equip your electrical room with the RD40-3-508 to ensure quick, safe, and compliant isolation when servicing critical equipment.