Siemens DTNF221 - 30A, 240V, Double-Throw, Safety Switch

Meet the Siemens DTNF221, a 30A, 240V double-throw safety switch built to deliver dependable on/off isolation and overcurrent protection in demanding industrial and commercial environments. This robust unit combines compact design with maintainability, making it a smart choice for where space is at a premium and reliability is non-negotiable.

Key specifications

• Model: DTNF221
• Amperage: 30A
• Voltage: 240V

Why this Siemens safety switch stands out

• Double-Throw design provides flexible switching options and a clear, safe off-position, helping to prevent accidental re-energization during maintenance.
• Compact, maintainable fusible switch ideal for installations where control panel real estate matters and serviceability is a priority.
• Reliable isolation and protection delivers trusted on/off control while safeguarding circuits from overcurrent conditions.
• Versatile for critical power control well-suited for motor disconnects, panelboards, and branch circuit protection in busy facilities.

Ideal applications

This safety switch is purpose-built for environments that demand rugged, dependable control points. Use it as a motor disconnect to safely isolate equipment during maintenance, as a compact point of protection within panelboard configurations, or as a safe, accessible disconnect for branch circuits where space and reliability are key.

Practical guidance and maintenance

To maximize uptime, pair the DTNF221 with your protection scheme and ensure clean, dry installation conditions. Regularly inspect connections and the operating mechanism, label the switch clearly for quick identification, and schedule routine functional checks as part of your electrical safety program. The DTNF221 is designed to remain a durable, low-maintenance component in your industrial control strategy.