For three hours, Aris fell down the rabbit hole. He discovered the manufacturer, "Semicoa," had been dissolved in a merger in 2005. That merger was absorbed by another in 2011. The new parent company’s archive only went back ten years. He emailed them anyway. The automated reply was polite and utterly useless.
Aris didn't run. He walked slowly, reverently, to the shelf. The binder was gray, held together with duct tape. He opened it. The smell of old pulp, ink, and dust filled his nose. And there it was, sandwiched between a 2N3055 transistor sheet and a note about thermal runaway: a single, stapled datasheet. c10ph zener diode datasheet pdf
The search engine, that great and indifferent god, returned nothing. A cascade of obsolete part aggregators, a forum post in Korean from 2003, and a link to an eBay listing for a "mystery lot" that included a blurry photo of something that might have been a C10PH. No PDF. No specs. No pinout. For three hours, Aris fell down the rabbit hole
As Aris closed his notebook, he looked at the cracked C10PH on his desk. He didn't throw it away. He taped the photocopied datasheet to a fresh piece of paper, stapled the broken diode next to it, and filed it under 'C' in "The Tomb." The new parent company’s archive only went back ten years