{"product_id":"solder-paste-flux-solder-paste-for-smd-pcb-soldering","title":"Solder Paste – Flux Solder Paste for SMD \u0026 PCB Soldering","description":"\u003ch1\u003eFlux Solder Paste for SMD \u0026amp; PCB Soldering\u003c\/h1\u003e\n\n\u003cp class=\"product-lede\"\u003eThis rosin‑based flux solder paste delivers consistent wetting and strong adhesion for SMD components on printed circuit boards, ideal for Arduino, ESP32, Raspberry Pi, and general electronics prototyping.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eComposition\u003c\/td\u003e\n\u003ctd\u003eRosin‑based flux with Sn63\/Pb37 solder alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMelting Point\u003c\/td\u003e\n\u003ctd\u003eApproximately 183°C (eutectic)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eViscosity\u003c\/td\u003e\n\u003ctd\u003eMedium, suitable for stencil printing and syringe dispensing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlux Content\u003c\/td\u003e\n\u003ctd\u003e~2.2% by weight\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003e50 g sealed tub\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eTranslucent amber\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eSMD soldering, PCB rework, through‑hole tacking\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShelf Life\u003c\/td\u003e\n\u003ctd\u003e12 months when stored at 15‑25°C in original container\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLED Chaser Circuit:\u003c\/strong\u003e Solder a row of 10 LEDs and resistors on perfboard, controlled by an Arduino Uno for a classic blinking pattern.\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-humidity-comfort-display\"\u003e\n\u003cstrong\u003eESP32 Environmental Monitor:\u003c\/strong\u003e Assemble an SMD‑based BME280 sensor and OLED display on a custom PCB for real‑time temperature and humidity logging.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRaspberry Pi Sensor HAT:\u003c\/strong\u003e Use the paste to mount SMD connectors, resistors, and an ADC chip onto a Pi‑compatible board for analog sensor input.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCBSE Class 12 Transistor Amplifier:\u003c\/strong\u003e Soldering practice project — mount a BC547 transistor, capacitors, and resistors on a general‑purpose PCB as per the physics practical syllabus.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB.Tech Final Year IoT Node:\u003c\/strong\u003e Fabricate a compact SMD‑based ESP32 module with Li‑Po charger and sensor interface for a Smart India Hackathon energy monitoring prototype.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003ctable class=\"compat-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003cth\u003eLibrary \/ Method\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSolder header pins, SMD shield chips; no direct electrical link\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Nano\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSolder SMD parts or wires onto Nano carrier boards\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Mega 2560\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eAssembly of SMD‑based sensors and shield boards\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP8266 NodeMCU\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eUsed to solder SMD resistors\/caps on breakout PCBs for NodeMCU\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP32 Dev Board\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eReflow soldering of SMD modules on custom ESP32 carrier PCBs\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi Pico\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSolder header pins or SMD components on Pico‑based projects\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi 4 \/ 5\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eMount SMD ICs on Pi HATs; manual soldering of connectors\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWiring and Interface Notes\u003c\/h2\u003e\n\u003cp\u003eApply a small dab of solder paste onto clean PCB pads using the syringe tip or a stencil, then place the SMD component on top. Heat the joint with a soldering iron (300–350°C) or a hot‑air rework station until the paste flows and forms a shiny fillet. \u003cem\u003eTip:\u003c\/em\u003e Clean the board with isopropyl alcohol before and after soldering to remove oxidation and residual flux for maximum joint strength.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq\"\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eIs this solder paste lead‑free?\u003c\/h3\u003e\n    \u003cp\u003eNo, this paste contains a Sn63\/Pb37 alloy and is not lead‑free. For ROHS‑compliant projects, a separate lead‑free solder paste is needed.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eHow should I store the paste to make it last longer?\u003c\/h3\u003e\n    \u003cp\u003eKeep the tub tightly closed in a cool, dry drawer (ideally below 25°C). Refrigeration can extend shelf life, but let it warm to room temperature before opening to avoid moisture condensation.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Product\",\n      \"@id\": \"https:\/\/compoden.in\/products\/solder-paste-flux-solder-paste-for-smd-pcb-soldering#product\",\n      \"name\": \"Flux Solder Paste for SMD \u0026 PCB Soldering\",\n      \"description\": \"High-quality flux solder paste for SMD soldering and PCB rework. Ideal for Arduino, ESP32, Raspberry Pi. Strong adhesion, clean joints. Buy at Compoden India.\",\n      \"sku\": \"CDN-1001\",\n      \"mpn\": \"CDN-1001\",\n      \"brand\": {\"@type\": \"Brand\", \"name\": \"Compoden\"},\n      \"offers\": {\n        \"@type\": \"Offer\",\n        \"priceCurrency\": \"INR\",\n        \"price\": \"PRICE_PLACEHOLDER\",\n        \"availability\": \"https:\/\/schema.org\/InStock\",\n        \"seller\": {\"@type\": \"Organization\", \"name\": \"Compoden\", \"url\": \"https:\/\/compoden.in\"}\n      }\n    },\n    {\n      \"@type\": \"FAQPage\",\n      \"@id\": \"https:\/\/compoden.in\/products\/solder-paste-flux-solder-paste-for-smd-pcb-soldering#faq\",\n      \"mainEntity\": [\n        {\"@type\": \"Question\", \"name\": \"Is this solder paste lead‑free?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No, this paste contains a Sn63\/Pb37 alloy and is not lead‑free. For ROHS‑compliant projects, a separate lead‑free solder paste is needed.\"}},\n        {\"@type\": \"Question\", \"name\": \"How should I store the paste to make it last longer?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Keep the tub tightly closed in a cool, dry drawer (ideally below 25°C). Refrigeration can extend shelf life, but let it warm to room temperature before opening to avoid moisture condensation.\"}}\n      ]\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53454859305325,"sku":"CDN-1001","price":120.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/p_76654707-e3a1-4cfa-87b4-6da140712a49.jpg?v=1782232100","url":"https:\/\/compoden.com\/products\/solder-paste-flux-solder-paste-for-smd-pcb-soldering","provider":"Compoden","version":"1.0","type":"link"}