Square D H221N - 30A, 240V, 2-Pole, Fused Disconnect Switch

When reliable power isolation is non-negotiable, the Square D H221N delivers. This 30A, 240V fused disconnect switch is purpose-built for indoor industrial and commercial environments where safe maintenance and dependable operation go hand in hand. Its two-pole design guarantees that both hot conductors are disconnected together, reducing the risk of backfeed and helping technicians perform lockout/tagout with confidence.

Designed for long-term durability, the H221N combines rugged construction with a straightforward disconnect mechanism. The fused protection helps guard equipment from overcurrent events, while the compact enclosure fits neatly into control panels and machine bays. Its indoor-friendly NEMA 1 enclosure provides solid protection against dust and incidental debris, making it a reliable choice for everyday daily-use applications.

Why this fused disconnect switch stands out

• Precise, safe isolation—a true two-pole disconnect that ensures both lines are interrupted simultaneously, streamlining maintenance and improving safety.
• Lockout/tagout compatibility—engineered to support standard safety procedures, helping teams lock devices out during service to prevent accidental energization.
• Load-ready performance—designed to reliably interrupt current when needed, providing dependable disconnection under typical operating conditions.
• Durable, indoor-ready enclosure—NEMA 1-rated housing protects the switch in everyday industrial and commercial settings, reducing exposure to dust and incidental contact.

Ideal applications and use cases

Perfect for control panels, equipment rooms, and service points where motors, pumps, conveyors, or HVAC components require a safe, code-aligned power shutoff. The H221N is well-suited for maintenance rooms, machine spaces, and areas where regular isolation is performed as part of routine servicing or line maintenance.

Technical specifications

• Amperage Rating: 30A
• Voltage Rating: 240V
• Number of Poles: 2-Pole
• Enclosure Rating: NEMA 1
• Product Type: Fused Disconnect Switch
• Brand: Square D
• Model: H221N

For professionals who value consistent, safe electrical isolation in everyday operations, the Square D H221N fuses a robust build with practical features that support efficient maintenance, safer lockout/tagout workflows, and durable performance in demanding environments. If you’re updating control panels or equipping service points with a trusted disconnect, this model delivers clear, enduring value.