TVS for 256V rail protection — now in end-of-life channel
The 1.5KE300CA_R2_00001: With a peak pulse power rating of 1500W (1.5kW) and a clamping voltage of 414V at 3.8A peak pulse current (10/1000µs waveform), it protects downstream semiconductors from voltage spikes in general-purpose DC bus and telecom power circuits.
Clamping and breakdown — what the ratings mean for the rail
The reverse standoff voltage of 256V is the maximum continuous DC voltage the TVS can withstand without conducting appreciably — a 240V nominal bus with 10% tolerance sits safely below this threshold. The minimum breakdown voltage of 285V is where the device starts to avalanche; the clamping voltage of 414V at the rated 3.8A peak pulse current defines the worst-case voltage the protected load sees during a transient event. In a real circuit, the actual clamping voltage at lower surge currents will be below the 414V max — the datasheet's V-I curve gives the exact clamp level for the expected transient energy. Operating temperature spans -65°C to 175°C junction, covering extreme environments from outdoor telecom cabinets to industrial control enclosures.
Package and board integration
Housed in a DO-201AE axial-lead package, this TVS is a through-hole component intended for hand-insertion or wave-solder assembly. The axial leads suit point-to-point wiring, terminal block integration, or PCB mounting with the body standing off the board for airflow.