A Buck & Boost Transformer is an insulating transformer with either a 120 V x 240 V primary with a 12/24 V or 16/32 V secondary, or a 240 V x 480 V primary with a 24/48 V secondary. A Buck & Boost Transformer is also useful in applications where the primary and secondary are interconnected for use as an autotransformer. The equipment enclosure is designed and constructed for indoor or outdoor use and is NEMA 3R rated. Square D Buck and Boost Transformers are UL and cUL listed. This Buck and Boost Transformer is a 1 phase, and has a NEMA 3R enclosure rating. This transformer has a primary voltage of 120 x 240 V and a secondary voltage of 16/32 V. This product have a temperature rise of 115 °C.