272-114-JBW is a part of a Residual Current Device (RCD) produced by the company, Eaton. It is designed to provide protection for wiring and circuit systems from over-current, as well as to protect against electric shock. It is also designed to detect and trip in the event of an excessive leak current, which may indicate a fault in the wiring system or a potential shock hazard. The part is rated for a maximum current of 30 amps, with a rated voltage of up to 250 volts AC or DC. It is single pole, and includes a red and yellow test button.