{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ULN2803ANG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ULN2803ANG4","canonicalUrl":"https://icboms.com/texas-instruments/ULN2803ANG4","factsUrl":"https://icboms.com/api/mcp/products/ULN2803ANG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ULN2803ANG4, 8 NPN Darlington transistor array, 50 V Vceo, 500 mA Ic, 1.6 V Vce sat, through-hole 18-DIP (0.300\"), -40 to 85 °C.","salesMarkdown":"## Eight Darlington pairs in a DIP — the workhorse relay driver The ULN2803ANG4 is an 8-channel NPN Darlington transistor array from Texas Instruments, packaged in a through-hole 18-DIP (0.300\", 7.62 mm body). Each pair can sink 500 mA continuous with a collector-emitter breakdown of 50 V, and the saturation voltage is held to 1.6 V max at 350 mA load — tight enough to keep a 12 V relay coil fully energised without excessive heat in the package. The 500 mA per-channel limit is per Darlington, not per package — if you drive all eight channels at 350 mA, the total die dissipation is 8 × 1.6 V × 0.35 A ≈ 4.5 W, which the DIP can handle with adequate copper on the board or a socket with airflow. The 50 V Vceo gives headroom for 24 V industrial loads and snubbing transients; stay below 40 V steady-state if you want margin on the avalanche rating. Operating temperature spans -40 to 85 °C, so this array is comfortable in motor-drive cabinets, outdoor telecom pedestals, and factory-floor panels where the ambient can swing. The 18-PDIP body is socket-friendly — a turned-pin socket makes field replacement straightforward if a channel fails shorted. Expect last-time-buy pricing on remaining stock; no further factory orders are being accepted.","metaTitle":"ULN2803ANG4 8 NPN Darlington Array, 50V, 500mA, Obsolete","metaDescription":"ULN2803ANG4 8-channel NPN Darlington driver, 50V Vceo, 500mA Ic, 1.6V Vce sat. Through-hole 18-DIP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tube","Power - Max":"-","Mounting Type":"Through Hole","Package / Case":"18-DIP (0.300\\\", 7.62mm)","Product Status":"Obsolete","Transistor Type":"8 NPN Darlington","lifecycle_stage":"eol_hot","Base Product Number":"ULN2803","Operating Temperature":"-40°C~85°C(TA)","Frequency - Transition":"-","Supplier Device Package":"18-PDIP","Vce Saturation (Max) @ Ib, Ic":"1.6V @ 500µA, 350mA","Current - Collector (Ic) (Max)":"500mA","Current - Collector Cutoff (Max)":"-","DC Current Gain (hFE) (Min) @ Ic, Vce":"-","Voltage - Collector Emitter Breakdown (Max)":"50V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.8400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/21b2b800bbdd24fddb5cb19410f89e2d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ULN2803ANG4/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy ULN2803ANG4?","answer":"The ULN2803ANG4 is obsolete from Texas Instruments. No factory stock remains; supply is limited to existing distributor and broker inventories."},{"question":"What is the replacement for ULN2803ANG4?","answer":"Texas Instruments has not published a direct replacement order code for the ULN2803ANG4. The broader ULN2803A family (e.g., ULN2803A in PDIP) is functionally identical — same 8 NPN Darlington array, 50 V Vceo, 500 mA Ic, and 1.6 V Vce sat — but verify the exact suffix for package and temperature grade compatibility with your BOM."},{"question":"Is ULN2803ANG4 obsolete?","answer":"Yes, the ULN2803ANG4 is listed as obsolete by Texas Instruments. No further factory production is planned. Sourcing is limited to the surplus and broker channel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ULN2803ANG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ULN2803ANG4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T18:01:16.860Z","lastPublished":"2026-07-16T18:01:16.860Z","indexable":true}}