The 5KP170CA-B ESD Suppressors / TVS Diodes TVS Hi-Power Axial from Littelfuse is a 5.0 kilovolt unidirectional, dual-line ESD protection device. It is intended to protect RC and RJ testing ports from electrostatic discharge (ESD) pulses in accordance with IEC-61000-4-2 Level 4. This device is designed with a proprietary, low-capacitance, high-power technology for lines up to 2KV common mode. It features high-power capability, excellent clamping capability, low leakage current, and fast response time.