Magnitudes M50L12DC-AR is the most compact LED driver on the market with a magnetic transformer core. It is equipped with an auto-reset breaker on the output which protects the driver. The driver is encased in a coated metal box that includes 2 knock-outs on the bottom to enable easy installation that complies with electrical code requirements.. Features:. Auto-reset circuit breaker. Dimmable with magnetic low-voltage dimmers. ETL listed. CSA listed.