Obsolete 1.5kW bidirectional TransZorb — what the ratings mean for a BOM replacement decision
The 1.5KE100CA/54: The part is listed as obsolete by the manufacturer.
Parametric guardrails for the replacement search
Above that, breakdown occurs at a minimum of 95 V, and the device clamps at 137 V maximum — the voltage the protected circuit must survive without damage. Peak pulse current is 10.9 A for the 10/1000 µs double-exponential waveform. The 1500 W rating is the product of clamp voltage and peak current at that waveform; a shorter pulse (8/20 µs) will sustain a higher peak current, but the 10/1000 µs figure is the standard comparison point for mains-borne transients. The DO-201AA axial-lead package (also known as DO-27) is a through-hole form factor. The junction temperature range spans -55°C to +175°C, covering military and industrial thermal environments without derating at the high end.
Sourcing an obsolete TVS — what to expect
Vishay lists the 1.5KE100CA/54 as obsolete. No official successor order code is recorded in the lifecycle data. Replacement sourcing relies on surplus or broker inventory — each lot is verified for authenticity and traceability before shipment. A functionally equivalent bidirectional TVS in the same package (DO-201AA) with a standoff voltage of 85.5 V and a 1500 W peak pulse rating can be sourced as a cross-reference, but pin-compatibility is package-defined — the axial leads are identical across the form factor. The replacement must match the clamp voltage and breakdown window to preserve the protection level.