1N4148W/WS-HF Switching Diodes Comchip Technology 1N4148W/WS-HF Switching Diodes are fast switching devices with high-reliability and high stability. The 1N4148W/WS-HF diodes feature power dissipation of 200mW to 500mW, 100V peak reverse voltage, and low reverse leakage. This 1N4148WS-HF switching diode operates at 125°C temperature and 1N4148W-HF switching diode at 150°C temperature. The 1N4148W/WS-HF switching diodes come with SOD-123 and SOD-323 with a molded plastic case and the color band denotes cathode end polarity.