{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ULN2802A","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"ULN2802A","canonicalUrl":"https://icboms.com/stmicroelectronics/ULN2802A","factsUrl":"https://icboms.com/api/mcp/products/ULN2802A","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics ULN2802A 8 NPN Darlington array, 50V Vceo, 500mA per channel, 1000 min hFE, 2.25W, 18-DIP through-hole, Tube.","salesMarkdown":"## Eight-channel Darlington relay and solenoid driver The STMicroelectronics ULN2802A integrates eight NPN Darlington pairs in a single 18-pin DIP, each rated for 500 mA continuous collector current and a 50 V collector-emitter breakdown. The 1000 minimum DC current gain at 350 mA means the base-drive current from a logic gate or microcontroller output stays below 500 µA per channel — no external driver transistor needed between a 5 V CMOS output and a 24 V relay coil. With a maximum Vce saturation of 1.6 V at 500 µA base current and 350 mA load, the on-state voltage drop across the output transistor stays low enough that the power dissipated in the package (2.25 W total across all eight channels) does not force a heatsink in most bench or panel applications — provided the combined load current stays within the package thermal budget. ## Through-hole DIP package and thermal profile Housed in the standard 18-lead 0.300-inch wide DIP (EIAJ/IPC 18-DIP), the ULN2802A mounts directly into a through-hole socket or solders into a plated-through-hole PCB. The 7.62 mm row spacing matches legacy prototyping boards and industrial I/O modules that still use DIP footprints — a deliberate choice for designs that need hand-solderability or socketed replacement. The junction temperature range spans -20°C to 150°C, which covers most indoor industrial and commercial enclosures. The 2.25 W total power dissipation is the sum of all eight channels' conduction loss plus any transient peaks; derating applies above 25°C ambient, and a 150°C junction ceiling means the part survives brief overloads without immediate failure. ## Active production and compliance posture The part ships in Tube packaging and carries a ROHS3 compliance rating, which covers the ten restricted substances plus the four phthalates under EU 2015/863. No REACH or UL documentation is confirmed in the listing, but the ROHS3 declaration is the baseline for EU-market shipments. For a BOM that needs a proven Darlington array in a through-hole package, this part is a direct drop-in for the industry-standard pinout shared by the ULN2003A family (though the ULN2802A offers eight channels versus seven). The active status means authorized-channel supply is the normal route; if a shortage hits, independent inventory with date-code traceability is the fallback — but the laser etch and package markings should match ST's plant font for the week code on the tube label.","metaTitle":"STMicroelectronics ULN2802A 8 NPN Darlington Array, 500mA","metaDescription":"STMicroelectronics ULN2802A 8 NPN Darlington array. 500mA per channel, 50V Vceo, hFE 1000 min. Active, RoHS3. 18-DIP through-hole. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Power - Max":"2.25W","Mounting Type":"Through Hole","Package / Case":"18-DIP (0.300\\\", 7.62mm)","Transistor Type":"8 NPN Darlington","lifecycle_stage":"eol_hot","Operating Temperature":"-20°C ~ 150°C (TJ)","Supplier Device Package":"18-DIP","Vce Saturation (Max) @ Ib, Ic":"1.6V @ 500µA, 350mA","Current - Collector (Ic) (Max)":"500mA","DC Current Gain (hFE) (Min) @ Ic, Vce":"1000 @ 350mA, 2V","Voltage - Collector Emitter Breakdown (Max)":"50V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.96","priceTiers":[{"qty":1,"price":"$2.96000","currency":"USD"},{"qty":10,"price":"$2.65800","currency":"USD"},{"qty":25,"price":"$2.50720","currency":"USD"},{"qty":100,"price":"$2.13630","currency":"USD"},{"qty":250,"price":"$2.00592","currency":"USD"},{"qty":500,"price":"$1.75516","currency":"USD"},{"qty":1000,"price":"$1.65582","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d45d0fb16f9f0d1f4ccb53c7b5e84fce.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ULN2802A/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum collector current per channel on the ULN2802A?","answer":"Each of the eight NPN Darlington pairs is rated for 500 mA continuous collector current (Ic max). The 50 V collector-emitter breakdown voltage (Vceo) and 1000 minimum DC current gain at 350 mA mean the base drive stays under 500 µA per channel for typical relay or solenoid loads."},{"question":"What package does the ULN2802A come in?","answer":"The ULN2802A is supplied in an 18-lead DIP package (18-DIP, 0.300-inch width, 7.62 mm row spacing) with through-hole mounting. The supplier device package is also 18-DIP. It ships in Tube packaging."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/ULN2802A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/ULN2802A 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}}