Siemens NF221DTK - 30A, 240V, 2-Pole, Double-Throw, Switch

Meet the Siemens NF221DTK—a rugged 30A, 240V, 2-Pole, Double-Throw switch engineered for dependable on/off isolation and overcurrent protection in demanding industrial and commercial environments. This two-pole design delivers precise control, enabling you to switch between circuits or sources while maintaining safe, mechanical isolation when maintenance is required.

Key specifications

• Model: NF221DTK
• Amperage: 30A
• Voltage: 240V
• Poles: 2-Pole
• Configuration: Double-Throw
• Type: Industrial switch for isolation and switching applications

Why this Siemens switch stands out

• Compact footprint that fits cleanly into panelboards and tight electrical enclosures, helping you maximize space without compromising performance.
• Rugged construction designed for frequent operation and reliable isolation under demanding service conditions.
• Clear, positive actuation with straightforward maintenance, reducing downtime during servicing.
• Ideal for motor disconnects and branch circuit protection where a robust, maintainable switch is required.
• Ease of servicing and replacement supports long-term reliability in busy industrial environments.

Ideal use cases

• Motor disconnects for conveyors, pumps, fans, and other equipment in manufacturing facilities or large buildings.
• Panelboard applications needing a compact, dependable isolation switch for safe energization and de-energization.
• Branch circuit protection in warehouses, data centers, and processing environments where quick, safe isolation is critical.
• Maintenance and commissioning projects requiring reliable, repeatable switching without complex setup.

Practical tips and buying considerations

• Pair the NF221DTK with appropriate lockout/tagout practices to ensure safe maintenance and compliance.
• Confirm that the connected load matches the 30A, 240V rating to prevent nuisance trips and extend life.
• Assess the installation environment (dust, moisture, temperature) and select compatible enclosures and mounting to maximize durability.
• Maintain a small stock of spare contact components or related parts to minimize downtime during routine service.