TRANSTECTOR's I2R-75KS127 127 VAC, one-pole, single-phase, two-wire module protector. This single-phase, 20 kA modular AC surge protection device is engineered for industrial communications. Through superior design, each I2R combines a robust 75 kA surge capacity that also eliminates back-up fusing requirements thus providing network operators with a quick to install, safe, and reliable product set for AC network surge protection.