About the 78155-77A
The 78155-77A module is a heat sink that was designed and manufactured by Reliance Electric. This product was also manufactured by Asea Brown Boveri and Reliance Electric. Should you need to purchase the 78155-77A heat sink, then be sure to call or email us. Despite the fact that it has been discontinued by the manufacturer and therefore is deemed as an obsolete product, AX Control tends to have it in stock.
The purpose of the 78155-77A heat sink, like all other heat sinks, is to collect the heat that is present in the device and disperse it away. Heat sinks can be used in many different kinds of high temperature devices, but the 78155-77A heat sink was specifically meant to be used within a Reliance Electric rectifier stack.
The 78155-77A heat sink, in comparison to the rest of the rectifier stack that it is meant to be attached to, is a relatively flat device. In the center of the 78155-77A heat sink, you can see four holes which help to facilitate the installation into a rectifier stack. On the side of this heat sink, you can see an extended piece which contains a few electric components on its surface. It has a metal oxide varistor that has two wires with connection pieces attached to it. This MOV is held down to the rest of the device using an adhesive material. In addition to that, there is a large resistor unit. This particular resistor unit has the product number 63481-40AX, which has a rating of 50 Watts and 30 Ohms.
The 78155-77A rectifier stack has a weight of approximately 0.99 lbs. or 0.45 kg., but that does not include any packaging materials.
