{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ESP32-S2-SOLO-N4","brand":"Espressif Systems","brandSlug":"espressif","productSlug":"ESP32-S2-SOLO-N4","canonicalUrl":"https://icboms.com/espressif/ESP32-S2-SOLO-N4","factsUrl":"https://icboms.com/api/mcp/products/ESP32-S2-SOLO-N4","rawCanonicalId":null},"summary":{"shortDescription":"Espressif Systems ESP32-S2-SOLO-N4 WiFi module, 802.11b/g/n, 2.4GHz, 150Mbps, 4MB Flash, 128kB ROM, 336kB SRAM, PCB trace antenna, 40-SMD module, -40°C to 85°C.","salesMarkdown":"## 4 MB flash, PCB trace antenna — the BOM-fit decision The ESP32-S2-SOLO-N4 packs a single-core Xtensa LX7 CPU with 4 MB flash and 336 kB SRAM — enough headroom for a TLS 1.3 stack and a small web server without external memory. The 128 kB ROM holds bootloader and crypto acceleration routines, so the flash is free for the application image. On the RF side, the integrated PCB trace antenna saves the cost of a ceramic chip or external whip, but the trade-off is placement sensitivity: the antenna pattern is printed on the module substrate, so metal enclosures or ground pours within 15 mm of the module edge will detune the match. Budget a pre-scan if the enclosure is shielded. Receiver sensitivity at -97 dBm (DSSS, 1 Mbps) gives a usable link margin of about 20 dB at 30 metres indoors through one drywall partition — enough for most IoT gateways. The 19.5 dBm TX power (802.11b, 1 Mbps) is the regulatory ceiling in most regions; plan for a 2-3 dB back-off if the device must pass FCC modular certification without a conducted measurement. ## Industrial temp range and supply rail Current draw peaks at 310 mA during 802.11b TX at 19.5 dBm — size the 3.3 V rail for at least 500 mA to cover the module plus any external sensors or pull-ups. Receive current is a steadier 71–75 mA, so the thermal load during continuous listening is low. ## Active lifecycle — no last-time-buy pressure No NRND flag, no EOL notice on file. This means the module is still in volume production and qualified for new designs — no need to stockpile or plan a last-time-buy. The base product number ESP32-S2 covers a family of modules; the -N4 suffix specifically denotes the 4 MB flash variant. If a BOM later needs more flash, the -N8 (8 MB) sibling is a drop-in footprint replacement, though the pinout and firmware image size differ. No single-source risk; the ESP32-S2 ecosystem has multiple module vendors (Espressif, third-party) using the same IC, but the -SOLO-N4 is the first-party Espressif module with full certification and support collateral.","metaTitle":"Espressif ESP32-S2-SOLO-N4 WiFi Module, 4MB Flash","metaDescription":"Active-production Espressif ESP32-S2-SOLO-N4 WiFi module with 4MB Flash, 802.11b/g/n, PCB trace antenna, -97dBm sensitivity. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF & Wireless ICs"],"specifications":{"Mfr":"Espressif Systems","Series":"ESP32","Package":"Cut Tape (CT)","Protocol":"802.11b/g/n","Data Rate":"150Mbps","Frequency":"2.4GHz","Modulation":"-","Memory Size":"4MB Flash, 128kB ROM, 336kB SRAM","Sensitivity":"-97dBm","Antenna Type":"PCB Trace","Mounting Type":"Surface Mount","Package / Case":"40-SMD Module","Power - Output":"19.5dBm","Product Status":"Active","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Serial Interfaces":"ADC, GPIO, I²C, I²S, SPI, PWM, UART, USB","RF Family/Standard":"WiFi","Utilized IC / Part":"ESP32-S2","Base Product Number":"ESP32-S2","Current - Receiving":"71mA ~ 75mA","Operating Temperature":"-40°C ~ 85°C (TA)","Current - Transmitting":"165mA ~ 310mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.1500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6bf4d9e814ff72b06259e949c58b1913.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the ESP32-S2-SOLO-N4?","answer":"Within the same ESP32-S2 module family, the ESP32-S2-SOLO-N8 (8 MB flash) shares the same 40-SMD footprint and pinout. The firmware image size and memory map differ, but the PCB layout is identical. No pin-compatible alternative exists outside the Espressif module line."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/espressif/ESP32-S2-SOLO-N4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/espressif/ESP32-S2-SOLO-N4 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}}