Siemens DTNF225 - Non-Fusible Disconnect Switch 400A @ 240V (200kA AIC, NEMA 1)

Siemens DTNF225 is a non-fusible disconnect switch designed for industrial power distribution systems requiring solid-state protection and high interrupting capacity. This single-phase switch operates at 240V AC with a 400A current rating, featuring a 200kA interrupting capacity at 240V for robust fault protection. The heavy-duty construction includes a NEMA 1-rated enclosure with ferrule connections, 2 poles, and a 3" diameter operating mechanism, weighing 268 lb for stable installation. Compliant with industry standards for Class R fuse applications, it provides LI (Long-Time and Instantaneous) protection via solid-state technology. Typical applications include motor control centers, panelboards, and other MAP frame-compatible electrical distribution equipment requiring reliable circuit isolation.

Key Features & Specifications

• Type: Non-fusible disconnect switch with solid-state protection
• Voltage Rating: 240V AC
• Current Rating: 400A
• Configuration: Single-phase, 2-pole
• AIC Rating: 200kA@240V
• Connection: Ferrule terminals
• NEMA Rating: NEMA 1
• Fuse Class: R
• Protection: LI (Long-Time and Instantaneous)
• Compatible Frames: MAP
• Coil Voltage Range: 220V min/max
• Wire Size: 4 AWG
• Dimensions: 3" diameter mechanism
• Weight: 268 lb

Product Identification

• UPC: 5171255311