Tracopower tof open frame power supplies tracopower tof 30 12sm the tracopower tof 30 12sm 30w open frame power supply 12v 25a is the ideal power supply for a demanding application as it features compact dimensions and a low profile this well designed unit is easy to install and connect via a molex pin connector while a chassis and cover kit are also available as an accessory compliance with international safety standards ceul and emc requirements qualify this product for worldwide use