{"product_id":"120355","title":"221-Z9001","description":"\u003cp\u003eDual General-Purpose Silicon NPN Transistor Array manufactured by Zenith Electronics under a proprietary master service code schema (cross-referencing directly to the industry-standard ECG706 specification layout). This 14-pin integrated circuit houses multiple matched NPN small-signal transistors sharing a common solid-state silicon substrate. It functions by allowing engineers to consolidate separate discrete transistor loops—such as driving matrix indicator lamps, switching localized control relays, or executing signal amplification cascades—into a single high-density footprint package to eliminate thermal drift variances and save printed circuit board surface space. It saw extensive architectural deployment inside legacy Zenith color television tuner circuits, cathode-ray tube (CRT) display driver paths, and vintage consumer audio-visual equipment. (Industry Exact Equals: Zenith 221-Z9001, Philips ECG706, NTE706, RCA SK3651, Texas Instruments CA3046, National Semiconductor LM3046N\u003c\/p\u003e","brand":"ZENITH","offers":[{"title":"Default Title","offer_id":32026564231221,"sku":"","price":52.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0219\/7936\/5440\/products\/ACtC-3fvUlBLMFIG80lNfyvv2fuU_cj4iImWS6SSEy8kq3Kmz3W6U5xWiNEWgJtTcdTAqRZngc7TblPUZhPu-gUen9K7AheOmHiU02UzprroUlqmGU2Y00JOeaYtgbIiDzGUM6tM1qBGvtdlGC66rcoqBvPvcg_w373-h135-no_46f67107-a2f6-43a6-9886-17282275a6f8.jpg?v=1614958499","url":"https:\/\/greenbrookonline.com\/products\/120355","provider":"Green Brook Online","version":"1.0","type":"link"}