Y08SV-272B

The Sankosha Y08SV-272B is a 2-electrode gas discharge tube (GDT) designed for protecting electronic equipment from induced voltage surges. It is suitable for applications such as communication equipment, AC power supplies, CATV systems, televisions, and antennas.

Key electrical specifications include a DC discharge start voltage ranging from 2430-3000V, an impulse discharge start voltage of ≤ 3900V, and an insulation resistance of ≥ 100 MΩ at DC 1000V. The device features a low capacitance of ≤ 1.0 pF at 1 MHz and an impulse current capacity of 3 kA (8/20 μs). Its impulse life is rated for 300 times at 8/20 μs with 100A.

This GDT is constructed with a ceramic envelope, providing excellent heat and mechanical shock resistance. It is also broadband compatible and designed for high voltage applications, supporting AC withstand voltage tests. The lead wire diameter is 0.8mm, and the internal electrode gap is 3.1mm, meeting VDE requirements.

Applications include transient voltage surge suppression (TVSS), AC line input protection, power supplies, CATV systems, televisions, antennas, and set-top boxes. It is noted that in circuit board applications, the area beneath the gas tube should be clear of copper traces. For AC power supply applications, a series resistance, typically an MOV, is required to limit follow-on current.