The Hammond 171A is a 100VA plug-in isolation transformer providing robust circuit isolation for various industrial applications. It utilizes a primary voltage of 115VAC and a secondary voltage of 115VAC, ensuring electrical separation between circuits. Key features include electrostatic shielding to attenuate surges and noise, a built-in circuit breaker for enhanced safety, and a standard three-wire grounded plug and receptacle. The transformer is equipped with a 5-foot primary cord and a 1-foot secondary 'pig tail' cord, making it suitable for easy integration into existing systems. It is UL listed and designed for indoor use only.