Siemens NR423 - Fusible Disconnect Switch 3P 100A (100kA AIC @240V)

Siemens NR423 is a fusible safety disconnect switch designed for industrial power distribution protection. It features a 240V AC voltage rating and 100A current capacity in a compact 3-pole single configuration with Class R fuse compatibility. The rugged NEMA 3R-rated enclosure houses copper bus bars and weighs 20 lb, meeting UL and IEC safety standards for short-circuit interruption up to 100kA at 240V. This switch is commonly used in motor control centers, panelboards, and industrial machinery requiring reliable circuit isolation.

Key Features & Specifications

• Type: Fusible safety disconnect switch with copper contacts
• Voltage Rating: 240V AC
• Current Rating: 100A
• Configuration: Single
• Poles: 3
• Phase: 3
• Fuse Class: R
• AIC Rating: 100kA@240V
• Wire: 3
• NEMA Rating: 3R
• Compatible Frames: PJP
• Switch Style: Fusible
• Weight: 20 lb
• Standards: UL 98, IEC 60947-3
• Applications: Industrial power distribution, MCCs, panelboards