{"product_id":"firduo-ip68-waterproof-connector-5a-for-efoil-rov-marine-wiring","title":"Firduo 5A IP68 Waterproof Signal Connector 3-Core \/ 4-Core for eFoil, ROV \u0026 Marine Wiring","description":"\u003ch3\u003e🔌\u003cspan\u003e \u003c\/span\u003eMulti-Core. Fully Sealed. Signal-Ready.\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eFirduo FD05-5A IP68 Waterproof Connector\u003c\/strong\u003e is a precision multi-core circular connector designed for reliable, moisture-proof signal and low-power connections in wet and outdoor environments. Available in \u003cstrong\u003e5A 3-core\u003c\/strong\u003e and \u003cstrong\u003e5A 4-core\u003c\/strong\u003e configurations with a rear-nut panel-mount socket, it features a threaded locking mechanism, gold-plated T2J copper contacts, and a full \u003cstrong\u003eIP68 waterproof rating\u003c\/strong\u003e. Purpose-built for eFoil sensor wiring, ROV\/AUV signal cables, BMS communication, and any marine or outdoor multi-wire application requiring a secure, re-mateable waterproof connection.\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"max-width: 100%;\" alt=\"Firduo FD05-5A IP68 waterproof connector 3-core 4-core overview\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0227\/7805\/2685\/files\/d9c7fd0ac1dbe3aeddbb954be62341b4.jpg?v=1782224054\"\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e⚡ Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eIP68 Waterproof Rating\u003c\/strong\u003e — fully sealed for continuous underwater submersion\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eTwo Configurations:\u003c\/strong\u003e 5A 3-core (3-wire signal) and 5A 4-core (4-wire signal\/power)\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eRear-Nut Panel-Mount Socket\u003c\/strong\u003e — secure enclosure wall installation without tools\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eGold-Plated T2J Copper Contacts\u003c\/strong\u003e — high conductivity, oxidation-resistant, corrosion-resistant\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eThreaded Locking Mechanism\u003c\/strong\u003e — clockwise to secure, counter-clockwise to release; vibration-proof\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eAnti-Misfit Circular Design\u003c\/strong\u003e — keyed to prevent incorrect mating\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eFinger Protection\u003c\/strong\u003e — recessed contacts prevent accidental touch on live pins\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e500-Cycle Rated\u003c\/strong\u003e — durable for repeated connect\/disconnect over the product lifetime\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eWide Temperature Range: -10–80°C\u003c\/strong\u003e — suitable for cold water and high-heat environments\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eRated 380V DC\/AC\u003c\/strong\u003e — safe for multi-wire signal and low-power applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e📋 Full Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f0f0f0;\"\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd; text-align: left;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd; text-align: left;\"\u003e5A-3Core\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd; text-align: left;\"\u003e5A-4Core\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eFD05-5A-3C\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eFD05-5A-4C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fafafa;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRated Current\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5A\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eNumber of Cores\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e3\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fafafa;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRated Voltage\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e380V DC\/AC\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e380V DC\/AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eWaterproof Rating\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eIP68\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eIP68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fafafa;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eTemperature Range\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e-10–80°C\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e-10–80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eCable OD Range\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e4–6.5mm\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e4–6.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fafafa;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eContact Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eT2J copper, gold-plated\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eT2J copper, gold-plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBody Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003ePA66\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003ePA66\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fafafa;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSocket Type\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRear-nut panel mount\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRear-nut panel mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eWiring Method\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSoldering\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSoldering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fafafa;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eMating Cycles\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e500 cycles\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e500 cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eLocking\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eThreaded nut (CW to lock)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eThreaded nut (CW to lock)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fafafa;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eColor\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBlack \/ Blue\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBlack \/ Blue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eNet Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e~15g\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e~15g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"margin: 20px 0px; text-align: left;\"\u003e\u003cstrong\u003eDimensions and mounting holes\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; margin: 20px 0;\"\u003e\n\u003cimg style=\"max-width: 100%; margin-bottom: 12px;\" alt=\"Firduo FD05-5A 3-core IP68 waterproof connector dimensions and pin layout\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0227\/7805\/2685\/files\/5-3.jpg?v=1782265992\"\u003e \u003cimg style=\"max-width: 100%;\" alt=\"Firduo FD05-5A 4-core IP68 waterproof connector dimensions and pin layout\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0227\/7805\/2685\/files\/5-4.jpg?v=1782265993\"\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003ch2\u003e📦 What's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5A-3Core:\u003c\/strong\u003e 1× Connector set (plug + rear-nut socket)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5A-4Core:\u003c\/strong\u003e 1× Connector set (plug + rear-nut socket)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eEach set includes one plug (male) and one rear-nut socket (female). \u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔗 Compatible Builds \u0026amp; Recommended Pairings\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eeFoil \/ Electric Surfboard\u003c\/strong\u003e — 3-core for PPM remote receiver signal (GND + VCC + signal);Hall sensor: GND + VCC + output); 4-core for UART remote receiver signal+motor temperature sensor + hall sensor wiring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eROV \/ AUV \/ Underwater Robot\u003c\/strong\u003e — IP68 for continuous submersion; ideal for multi-wire thruster control and sensor signal penetrations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS \/ Battery Management\u003c\/strong\u003e — 3-core or 4-core for CAN bus, UART, or balance wire connections through waterproof enclosures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eeBike \/ Electric Scooter\u003c\/strong\u003e — brake sensor (3-core), throttle + brake combined (4-core) waterproof connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine \/ Boat Wiring\u003c\/strong\u003e — navigation sensor feeds, bilge pump controls, multi-wire signal penetrations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePair with:\u003c\/strong\u003e \u003ca rel=\"noopener\" title=\"Firduo IP68 Waterproof Connector 10A\/24A for eFoil, ROV \u0026amp; Marine Wiring\" href=\"https:\/\/firduo.com\/collections\/other\/products\/firduo-24a-waterproof-plug-socket-for-electric-hydrofoil-surfboard\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(0, 0, 255);\"\u003eFirduo FD05 10A\/24A Waterproof Connector\u003c\/span\u003e\u003c\/a\u003e — for higher-current single or dual-wire connections in the same build\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePair with:\u003c\/strong\u003e \u003cspan style=\"color: rgb(0, 0, 255);\"\u003e\u003ca href=\"https:\/\/firduo.com\/collections\/other\/products\/firduo-120a-ip68-waterproof-plug-socket-efoil-hydrofoil-surfboard\" title=\"Firduo 120A High Current and High Voltage Waterproof Plug Socket for Electric Hydrofoil \u0026amp; Surfboard\" style=\"color: rgb(0, 0, 255);\" rel=\"noopener\" target=\"_blank\"\u003eFirduo 120A High-Current Waterproof Connector\u003c\/a\u003e\u003c\/span\u003e— for motor phase power connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePair with:\u003c\/strong\u003e \u003ca href=\"https:\/\/firduo.com\/collections\/other\/products\/firduo-ip68-waterproof-cable-connector-outdoor\" title=\"Firduo IP68 Waterproof Cable Connector for Outdoor Use\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(0, 0, 255);\"\u003eFirduo IP68 Cable Gland Connector\u003c\/span\u003e\u003c\/a\u003e — for cable penetration sealing through enclosure walls\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e🛠️ Setup Guide (Quick Start)\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelect the correct variant\u003c\/strong\u003e — Use \u003cstrong\u003e5A-3Core\u003c\/strong\u003e for 3-wire signal connections (e.g. PPM receiver: GND + VCC + signal; hall sensor: GND + VCC + output). Use \u003cstrong\u003e5A-4Core\u003c\/strong\u003e for 4-wire connections (e.g. motor temperature + hall sensor combined; CAN bus: GND + VCC + CAN-H + CAN-L). Both are rated 5A per pin — do not exceed 5A per conductor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare your cables\u003c\/strong\u003e — Strip 3–4mm of insulation from each wire end. Ensure cable outer diameter is within \u003cstrong\u003e4–6.5mm\u003c\/strong\u003e. Multi-core cables with individual conductors must fit within this OD range for the rubber seal to compress correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread cable through connector body first\u003c\/strong\u003e — Before soldering, slide the rubber seal gland and connector body over the cable. This step cannot be done after soldering — do not skip it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolder wires to contacts\u003c\/strong\u003e — Tin each wire end and contact pin. Flow solder briefly into each contact cup. With 3 or 4 pins in close proximity, use minimal solder to avoid bridging adjacent contacts. Allow to cool fully before assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat the contact assembly\u003c\/strong\u003e — Push the soldered contact assembly into the connector body. Verify each pin is fully seated before tightening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount the rear-nut socket\u003c\/strong\u003e — Insert the socket through your enclosure panel hole from the outside. Thread the rear nut from the inside and tighten to secure the socket flush against the panel. Apply PTFE thread tape or Waterproof silicone for additional sealing if needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTighten the plug locking nut \u0026amp; test\u003c\/strong\u003e — Align plug and socket (anti-misfit keying ensures correct orientation), push together, and rotate the locking nut \u003cstrong\u003eclockwise\u003c\/strong\u003e until firm. For eFoil\/ROV use, submerge the mated pair for 30 minutes to verify the seal before full deployment. To disconnect: rotate nut counter-clockwise and pull apart.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003chr\u003e\n\u003ch2\u003e❓ FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: What is the difference between 3-core and 4-core, and which should I choose?\u003c\/strong\u003e\u003cbr\u003eChoose \u003cstrong\u003e5A-3Core\u003c\/strong\u003e for 3-wire signal connections — common uses include PPM\/PWM remote receiver (GND + VCC + signal), hall effect sensors, or any 3-wire sensor\/signal cable. Choose \u003cstrong\u003e5A-4Core\u003c\/strong\u003e for 4-wire connections — common uses include CAN bus (GND + VCC + CAN-H + CAN-L), motor temperature + hall sensor combined, or 4-wire throttle assemblies. Both variants are rated 5A per pin and share the same IP68 housing and cable OD range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: How does this connector differ from the FD05 10A\/24A variants?\u003c\/strong\u003e\u003cbr\u003eThe FD05-5A (this product) is optimized for \u003cstrong\u003emulti-core signal wiring\u003c\/strong\u003e — 3 or 4 conductors at up to 5A each. The \u003ca rel=\"noopener\" title=\"Firduo IP68 Waterproof Connector 10A\/24A for eFoil, ROV \u0026amp; Marine Wiring\" href=\"https:\/\/firduo.com\/collections\/other\/products\/firduo-24a-waterproof-plug-socket-for-electric-hydrofoil-surfboard\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(0, 0, 255);\"\u003eFD05 \u003c\/span\u003e\u003c\/a\u003e\u003ca rel=\"noopener\" href=\"https:\/\/firduo.com\/products\/firduo-24a-waterproof-plug-socket-for-electric-hydrofoil-surfboard\" target=\"_blank\"\u003e10A-2Core and 24A-1Core\u003c\/a\u003e variants are designed for fewer conductors at higher current (10A or 24A). Use the 5A multi-core for signal and sensor wiring; use the 10A\/24A variants for power connections. All share the same IP68 rating, PA66 body, and gold-plated contacts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: What cable sizes are compatible?\u003c\/strong\u003e\u003cbr\u003eThe FD05-5A accepts cables with an outer diameter of \u003cstrong\u003e4–6.5mm\u003c\/strong\u003e. For multi-core cables, the total OD of the jacketed cable must fall within this range. Common 3-core and 4-core signal cables (12AWG–10AWG conductors) typically have a jacketed OD of 4–6mm — verify your cable OD before ordering. Cables outside the 4–6.5mm range will not seal correctly and the IP68 rating will not be achieved.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: Is IP68 maintained after repeated mating cycles?\u003c\/strong\u003e\u003cbr\u003eYes, within the rated \u003cstrong\u003e500 mating cycles\u003c\/strong\u003e and provided the rubber seal is undamaged. After each disconnection, inspect the seal gland for cuts, compression set, or debris before re-mating. Rinse with fresh water after salt water use. If the seal shows wear or the locking nut no longer holds firmly, replace the connector set.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5: Can I use this connector for salt water \/ marine applications?\u003c\/strong\u003e\u003cbr\u003eYes. The PA66 body and gold-plated T2J copper contacts are corrosion-resistant and rated for salt water environments. Always rinse with fresh water after salt water exposure and inspect contacts periodically. The gold plating significantly extends contact life compared to bare copper or tin-plated alternatives. For critical marine installations, perform a 30-minute submersion test after assembly to verify seal integrity before deployment.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopifycdn.net\/s\/files\/1\/0227\/7805\/2685\/files\/4_-1_1024x1024.jpg?v=1599466314\" alt=\"Firduo FD05 IP68 waterproof connector application scenarios eFoil marine outdoor\" style=\"float: none;\"\u003e\u003c\/div\u003e","brand":"FIRDUO","offers":[{"title":"5A-3Core","offer_id":47617844838578,"sku":"5A-3C","price":3.0,"currency_code":"USD","in_stock":true},{"title":"5A-4Core","offer_id":47617844871346,"sku":"5A-4C","price":3.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0227\/7805\/2685\/files\/5A-3_4.jpg?v=1782265967","url":"https:\/\/firduo.com\/products\/firduo-ip68-waterproof-connector-5a-for-efoil-rov-marine-wiring","provider":"Firduo","version":"1.0","type":"link"}