What the 1N6275A is and where it fits
The 1N6275A is a Zener-type transient voltage suppressor from onsemi's Mosorb™ series, designed for general-purpose circuit protection. It clamps transients at a minimum breakdown voltage of 14.3V and handles 1500W peak pulse power. The DO-201AD axial package suits through-hole board layouts where a replaceable, high-surge component is preferred over surface-mount. The 12.8V reverse standoff voltage means it starts conducting only above normal 12V rail levels, making it a fit for 12V system transient protection — automotive, industrial control, or telecom line-side clamping.
Obsolete — sourcing reality for the 1N6275A
onsemi lists the 1N6275A as Obsolete. No official successor is cited. For a BOM line that needs this exact order code, the only channel is the independent market — we source and quote to order against your quantity. The base product number 1N6275 shares the same die and package; the 'A' suffix typically indicates a tighter tolerance on breakdown voltage. If your application can tolerate the standard tolerance, the non-A variant may be a drop-in alternative — confirm the clamping voltage spec against your design margin.
Key ratings and what they mean for your BOM
The 1500W peak pulse power rating is specified at 10/1000 µs waveform — the standard TVS test condition. For shorter pulses (e.g. 8/20 µs), the diode can absorb significantly more peak current; for longer transients, derate accordingly. This rating sets the upper bound on the surge energy the diode can clamp before failure. Operating temperature range -65°C to 175°C covers military and industrial extremes. The junction temperature limit of 175°C means the device can sit in a hot enclosure or near a heatsink without derating the pulse capability, as long as the average power dissipation stays within the package limits.