The DS3800NPCS1B1B is a part of the Speedtronic Mark IV by GE. The DS3800NPCS1B1B is known as a Field EXC Snubber Turbine Control. A snubber is a board that is used to snub or limit voltage spikes in an electrical system. If there is an electrical surge the snub board assists in 1) if there is an electrical surge it may cause electromagnetic interference (EMI) which can cause the device itself to malfunction or can have a negative effect on devices nearby. 2) if an electrical spike happens that is higher than the device can handle it can cause the significant if not unrepairable damage to the device itself. The snubber board is used as a short-term alternative path for a current around a switching device so the inductive element can be discharged quietly and safely. Snubbers are used to prevent arcing across switches and relays to prevent power surges and damage. The DS3800NPCS1B1B has four (4) metal oxide varistors and four (4) yellow rectangular capacitors in the center of the board. The DS3800NPCS1B1B also has four (4) large power resistors and four (4) small power resistors, used to dispense high power like during a power surge. Along the left side of the board are a series of copper-colored pegs. The board also features several multi-colored resistors. Every component is outlined and labeled in white letters and numbers for easy identification. Along the bottom of the board is the serial number for the device, written in white numbers and letters.