1.5kW bidirectional Zener TVS in DO-201
The 1.5KE18CA-B: The DO-201 (DO-27) axial-lead package suits through-hole assembly on boards where a replaceable, high-surge TVS is preferred over surface-mount — common in PSU input stages, battery circuits, and field-serviceable equipment.
Obsolete — surplus-channel sourcing
Sourcing runs through independent surplus and broker channels; each lot is verified for date-code consistency and original packaging before quoting.
What the ratings mean for the BOM
The 15.3 V reverse standoff (working voltage) means the TVS does not conduct at normal 12 V or 15 V rail levels — leakage is negligible below that threshold. Clamping at 25.2 V limits the voltage seen by downstream components during a surge; the 59.5 A peak pulse current handling ensures the diode absorbs the transient without failing short.