1500W axial TVS for general-purpose transient suppression
The 1.5KE200A A0G: With a 171V reverse standoff voltage and a 274V clamping point at 5.7A, it sits in the 170V rail range — common for 120/240VAC secondary rectification, industrial DC buses, and telecom line cards that need a single-direction clamp. The DO-201AA axial package (also known as DO-27) is through-hole, which means it survives rework cycles well — the leads take the heat, not the die. Pin 1 is the cathode band; orientation is unambiguous under a hot-air station or wave solder.
For a 170V DC bus, that clamp gives about 60% headroom above the rail — enough margin for most downstream semiconductors rated at 300V or higher. The 5.7A peak pulse current is the current the diode shunts at the clamp voltage. In a real fault, the source impedance determines the actual current; this rating confirms the diode can handle the full 1500W pulse without failing short. The wide range also means derating at high ambient is predictable; at 125°C ambient the pulse power capability drops to roughly 75% of the 1500W rating, per standard Zener derating curves.
Active production — sourcing and compliance
The part is supplied in Tape & Box (TB) packaging, which is the standard bulk format for axial diodes — suitable for hand insertion or vibratory bowl feeders.