{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TDA7850","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TDA7850","canonicalUrl":"https://icboms.com/stmicroelectronics/TDA7850","factsUrl":"https://icboms.com/api/mcp/products/TDA7850","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TDA7850, Class AB quad audio amplifier, 85W x 4 @ 2 Ohm, 8V to 18V supply, through-hole 25-Flexiwatt (formed leads), -55°C to 150°C junction temperature.","salesMarkdown":"The STMicroelectronics TDA7850 is a Class AB quad-channel audio amplifier delivering 85W per channel into a 2 Ohm load. It runs directly off a standard 12V automotive electrical system — the 8V to 18V supply range means no extra regulator needed for car audio head units or external amp modules. The through-hole 25-Flexiwatt package with formed leads is serviceable with a soldering iron; no hot-air station required for a field swap. Built-in mute, standby, and short-circuit/thermal protection reduce external BOM count and protect the speaker load during fault conditions. The headline rating of 85W x 4 into 2 Ohm tells you this amp is designed for low-impedance automotive speakers or parallel-wired loads. At 4 Ohm (typical aftermarket coaxials) the output will be lower, but the 2 Ohm capability gives headroom for subwoofer or high-power midbass channels without clipping. The Class AB linear topology means clean audio but higher quiescent current than a Class D — budget for adequate heatsinking in a sealed enclosure. ## Temperature range — under-hood or trunk, it survives The 150°C TJ max is the silicon limit, not the case temperature — the 25-Flexiwatt package needs a proper heatsink to keep the junction below that in continuous operation at 85W.","metaTitle":"TDA7850 Class AB Quad Audio Amp, 85W x 4 @ 2 Ohm","metaDescription":"STMicroelectronics TDA7850 Class AB quad audio amplifier, 85W per channel into 2 Ohm. Active, ROHS3, through-hole 25-Flexiwatt. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"Class AB","Package":"Tube","Features":"Mute, Short-Circuit and Thermal Protection, Standby","Output Type":"4-Channel (Quad)","Mounting Type":"Through Hole","Package / Case":"25-Flexiwatt (Formed Leads)","lifecycle_stage":"eol_hot","Voltage - Supply":"8V ~ 18V","Operating Temperature":"-55°C ~ 150°C (TJ)","Supplier Device Package":"25-Flexiwatt (Vertical)","Max Output Power x Channels @ Load":"85W x 4 @ 2Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.41","priceTiers":[{"qty":1,"price":"$11.41000","currency":"USD"},{"qty":10,"price":"$10.30300","currency":"USD"},{"qty":25,"price":"$9.82400","currency":"USD"},{"qty":100,"price":"$8.53020","currency":"USD"},{"qty":250,"price":"$8.14684","currency":"USD"},{"qty":500,"price":"$7.91176","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ba5696c8a700f9bc8a62b8f26daf524b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TDA7850/alternatives.json"},"ai":{"faq":[{"question":"Is TDA7850 available via RFQ confirmation and available for immediate shipping?","answer":"Stock levels and lead times vary by batch. The part is sourced to order against an RFQ; availability and shipping timeline are confirmed at quote time. No stock count or shipping promise is published here."},{"question":"What is the equivalent or replacement for TDA7850?","answer":"The TDA7850A is the closest functional second-source — same 85W output, same 4-channel Class AB architecture, same 25-Flexiwatt package. The TDA7563B is a 75W alternative with I²C control. Neither is a drop-in without checking the pinout and feature set against your PCB layout."},{"question":"How does TDA7850 compare to TDA7560 or other quad audio amps?","answer":"The TDA7850 delivers 85W per channel into 2 Ohm, while the TDA7560 family typically tops out at 75W. The TDA7850 lacks I²C bus control (no volume/balance via digital interface), so it is a simpler analog amp for applications where you control gain with external resistors or a potentiometer. The TDA7801 is a Class D alternative with digital inputs (I²S) but lower power (72W) and a narrower temperature range."},{"question":"Can TDA7850 be used in a 12V car audio system directly?","answer":"Yes. The 8V to 18V supply range covers a nominal 12V automotive system, including engine cranking dips and alternator overvoltage. No external regulator is needed — just a clean 12V feed from the battery or distribution block."},{"question":"Is TDA7850 compatible with TDA7560?","answer":"The TDA7850 and TDA7560 share the same 4-channel Class AB architecture and 25-Flexiwatt package, but the TDA7560 is a 75W part with I²C bus control. The TDA7850 is a simpler analog amp without digital interface. Check the pinout — they are not guaranteed drop-in compatible without reviewing the datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TDA7850","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TDA7850 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}