short-circuit protection

NEC 450.3 Quick Selector: Instantly Pick the Best Transformer Primary Protection

Cut through NEC 450.3 confusion with our quick selector that helps you instantly pick the best transformer primary protection. Friendly guidance and clear options make code compliance fast and painless.

Instant Peak Let-Through & I2t Calculator — Current-Limiting Fuse Screening Tool

Quickly screen current-limiting fuses and estimate peak let-through energy with the Instant Peak Let-Through & I2t calculator. Fast, accurate, and easy to use, it helps engineers pick the right protection in seconds.