{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TDA7850A","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TDA7850A","canonicalUrl":"https://icboms.com/stmicroelectronics/TDA7850A","factsUrl":"https://icboms.com/api/mcp/products/TDA7850A","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TDA7850A, Class AB, 4-Channel (Quad) audio amplifier, 85W x 4 @ 2Ohm, 8V ~ 18V supply, -55°C ~ 150°C, 27-Flexiwatt (Formed Leads), Through Hole, Tube.","salesMarkdown":"The ST TDA7850A is a Class AB quad audio amplifier in a 27-Flexiwatt through-hole package, delivering 85W per channel into 2Ω loads. It's built for car radio head units, marine audio, and any 12V nominal system that needs clean linear output without the switching noise of Class D. The headline number is 85W x 4 into 2Ω. That's the maximum output per channel when driving a 2-ohm speaker — typical for subwoofers or multi-driver door pods. At 4Ω the power drops roughly by half, so budget your speaker impedance and wiring gauge accordingly. The TDA7563B sibling tops out at 75W x 4 into 2Ω and adds I²C bus control for diagnostics; the TDA7850A keeps it simpler with hardwired mute and standby pins, no digital interface. ## Protection features that save a board swap Short-circuit and thermal protection are built in — the amp shuts down before the output stage or the speaker coil cooks. The standby pin lets a microcontroller or head-unit logic pull the amp into low-current sleep when the radio is off, avoiding battery drain. Mute pin holds the outputs at zero during power-up transients so you don't get a thump through the speakers. The TDA7850A is Active with ROHS3 compliance. No end-of-life notice on record.","metaTitle":"STMicroelectronics TDA7850A Class AB Audio Amp, 85W x 4 @ 2Ω","metaDescription":"ST TDA7850A Class AB quad audio amplifier, 85W x 4 channels at 2Ω, 8V-18V supply, -55°C to 150°C, mute/protection. Active production, 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":"27-Flexiwatt (Formed Leads)","lifecycle_stage":"eol_hot","Voltage - Supply":"8V ~ 18V","Operating Temperature":"-55°C ~ 150°C (TJ)","Supplier Device Package":"27-Flexiwatt (Vertical)","Max Output Power x Channels @ Load":"85W x 4 @ 2Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.77","priceTiers":[{"qty":1,"price":"$11.77000","currency":"USD"},{"qty":10,"price":"$10.62900","currency":"USD"},{"qty":25,"price":"$10.13480","currency":"USD"},{"qty":100,"price":"$8.80000","currency":"USD"},{"qty":250,"price":"$8.40452","currency":"USD"},{"qty":500,"price":"$8.16200","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9642c8899eea896a988b99029db915d2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TDA7850A/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum output power of TDA7850A?","answer":"85W per channel into 2Ω loads, four channels total."},{"question":"Does TDA7850A have thermal protection?","answer":"Yes, it includes short-circuit and thermal protection, plus mute and standby functions."},{"question":"Can TDA7850A replace TDA7850?","answer":"The TDA7850A is functionally equivalent to the TDA7850 — same 85W output, same protection features, same 27-Flexiwatt package. It's a direct drop-in replacement."},{"question":"What is the pinout of TDA7850A?","answer":"The pinout is defined in the STMicroelectronics datasheet for the 27-Flexiwatt (Vertical) package. The part uses formed leads for through-hole mounting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TDA7850A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TDA7850A 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}}