Siemens DTNF221 - 30A, 240V, 2-Pole, Disconnect Switch

The Siemens DTNF221 30A, 240V, 2-Pole Disconnect Switch is purpose-built for demanding industrial and commercial environments where safe, reliable electrical isolation is essential. Designed to support lockout/tagout procedures, this disconnect switch provides a clear, definitive break in both hot lines, helping to protect technicians during maintenance and service while minimizing downtime.

Why the DTNF221 stands out

• True two-pole isolation: disconnects both conductors, guaranteeing complete de-energization of connected equipment.
• Lockout/tagout compatibility: designed to integrate with standard safety protocols, helping you meet regulatory and safety requirements with confidence.
• Reliable under-load performance: engineered to deliver dependable disconnection even when circuits are energized, reducing risk during critical maintenance windows.
• Durable, field-ready design: built to endure the rigors of busy industrial environments, offering long-term service life in commercial settings.

Key specifications

• Amperage rating: 30A
• Voltage rating: 240V
• Poles: 2-Pole
• Product type: Disconnect Switch
• Brand: Siemens
• Model: DTNF221

Ideal applications

• Maintenance shutdowns for motors, conveyors, pumps, and control panels where full isolation is critical
• Service disconnects in industrial or commercial electrical rooms and equipment enclosures
• Safety-critical processes that require reliable lockout/tagout procedures
• Control circuits and feeder lines where quick, clean disconnection is needed without compromising other systems

Practical insights and usage tips

• Pair the DTNF221 with standard lockout/tagout practices to ensure personnel safety during servicing.
• Use in applications where both supply lines must be isolated to prevent backfeed and ensure safe maintenance conditions.
• Verify compatibility with your cabinet or enclosure mounting and ensure proper clearances for safe operation.
• Consider this device when you need a dedicated isolation point that balances ease of use with robust, long-term reliability in high-demand environments.