Obsolete 1.5kW bidirectional transient suppressor
The 1.5KE150CA-B is a 1500W bidirectional TVS diode from Diodes Incorporated, now classified as obsolete by the manufacturer. It protects a single line against transient overvoltage events, clamping at 207V maximum for a 7.2A peak pulse current (10/1000µs waveform). With a 128V reverse standoff voltage and a minimum breakdown of 143V, this part sits in the 120V-150V DC bus protection range — common for 3-phase rectified mains or 110VAC telecom power feeds where the nominal rail is around 120-130V.
Housed in a DO-201AA / DO-27 axial-lead package (supplier device package DO-201), the 1.5KE150CA-B is a through-hole part. The axial leads require manual or wave-solder assembly — no reflow profile to worry about, but the lead bend radius and body standoff from the board need to be controlled to avoid stress on the glass passivation. Operating junction temperature range is -55°C to +175°C, which covers military and industrial thermal environments. The 1500W peak pulse rating is derated linearly above 25°C; at 175°C the effective power handling drops to near zero, so keep the ambient below 100°C for full surge capability.
Sourcing and lifecycle reality
Sourcing is through independent surplus and broker channels. We can quote this part against an RFQ — availability is lot-specific and confirmed at quote time.