Diode 1N2637 is a semiconductor diode that is used as a replacement for vacuum lamps such as 3B28, 866 and 866A in microwave and radio circuits.

This diode is especially used in RF amplifiers and microwave transformers.

Key Technical Specifications:

• Maximum Inverse Voltage (PIV): 4.3V

• Forward Current: 1 mA

• Basic Structure: UX4 (2 Pins, American Standard)

• Dimensions: 1.5mm (1.2.5 inches)

• Structure: Silicone, with the same performance of vacuum lamps

• Common Applications: Replacement for Vacuum Lams in RF and Microwave Circuits

Benefits of Vacuum Lamps:

• Longer life and longer stability

• Volume and less weight

• Higher performance at high frequencies

• more reasonable price than vacuum lamps

Price and availability:

• Currently, the diode is priced at online markets like Langrex about £ 5 (approximately US $ 2).

Practical Applications:

• RF amplifiers at high frequencies

• Microwave transformer to produce microwave signals

• Radio circuits that require high inverted voltage