{"product_id":"ebyte-sw433-th32dn-high-quality-spring-antenna-433mhz-50ω-1dbi-stable-and-reliable","title":"Ebyte SW433-TH32DN Spring Antenna 433MHz 50Ω 1dBi","description":"\u003csection class=\"module-view\"\u003e\u003c!-- 1. Product Overview --\u003e\n\u003cdiv class=\"module-news\"\u003e\n\u003cdiv class=\"module-right\"\u003e\n\u003cdiv class=\"module-ti\"\u003e\u003cstrong\u003eEbyte SW433-TH32DN — 433MHz Helical Spring Antenna, 50Ω, 1dBi, Through-Hole\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-in\"\u003e\n\u003cp\u003e\u003cb\u003eModel:\u003c\/b\u003e SW433-TH32DN\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFrequency:\u003c\/b\u003e 433 MHz (ISM band, 420–450 MHz)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eImpedance:\u003c\/b\u003e 50 Ω\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eGain:\u003c\/b\u003e 1 dBi (omnidirectional)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eConnector \/ Mount:\u003c\/b\u003e Through-hole (TH) spring, direct PCB solder\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePolarization:\u003c\/b\u003e Vertical, linear\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCompliance:\u003c\/b\u003e RoHS\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCompatible Modules:\u003c\/b\u003e Ebyte E30-433T20D, E22-400T22S, E220-400T22S, and all 433 MHz UART\/SPI RF modules with 50Ω antenna port\u003c\/p\u003e\n\u003cimg loading=\"lazy\" alt=\"Ebyte SW433-TH32DN 433MHz helical spring antenna — through-hole PCB mount, 50Ω 50 ohm 1dBi omnidirectional\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/1200_981a2ced-a45c-473e-93ee-2c4db47f9071.jpg?v=1763697052\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Technical Specifications --\u003e\n\u003cdiv id=\"module\" class=\"specificate\"\u003e\n\u003cdiv class=\"parameters-table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003cth\u003eRemark\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCenter Frequency\u003c\/td\u003e\n\u003ctd\u003e433 MHz\u003c\/td\u003e\n\u003ctd\u003eISM band, 420–450 MHz usable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImpedance\u003c\/td\u003e\n\u003ctd\u003e50 Ω\u003c\/td\u003e\n\u003ctd\u003eStandard RF impedance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e1 dBi\u003c\/td\u003e\n\u003ctd\u003eOmnidirectional, vertical polarization\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVSWR\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003ctd\u003eMeasured at 433 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Input Power\u003c\/td\u003e\n\u003ctd\u003e1 W (30 dBm)\u003c\/td\u003e\n\u003ctd\u003eContinuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRadiation Pattern\u003c\/td\u003e\n\u003ctd\u003eOmnidirectional\u003c\/td\u003e\n\u003ctd\u003e360° horizontal coverage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePolarization\u003c\/td\u003e\n\u003ctd\u003eVertical, linear\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eThrough-hole (TH)\u003c\/td\u003e\n\u003ctd\u003eDirect PCB solder, no connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp.\u003c\/td\u003e\n\u003ctd\u003e−40 to +85 ℃\u003c\/td\u003e\n\u003ctd\u003eIndustrial grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eRoHS\u003c\/td\u003e\n\u003ctd\u003eLead-free materials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Product Details \/ Key Features --\u003e\n\u003cdiv class=\"containers\"\u003e\n\u003cdiv class=\"product-introduct\"\u003e\n\u003cdiv class=\"product-pbott\"\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003e50Ω Impedance Matching — Maximum Power Transfer to Your RF Module\u003c\/h3\u003e\n\u003cp\u003eThe SW433-TH32DN is wound and tuned to present a 50Ω impedance at 433 MHz, matching the standard output impedance of all Ebyte RF modules (E30, E22, E220 series) and virtually all commercial 433 MHz transceivers. Proper impedance matching minimizes reflected power (VSWR ≤2.0), ensuring the full transmit power reaches the antenna and maximizing effective range without additional matching components.\u003c\/p\u003e\n\u003ch3\u003eThrough-Hole PCB Mount — Mechanically Robust, No Connector Loss\u003c\/h3\u003e\n\u003cp\u003eThe spring antenna solders directly to a PCB through-hole pad, eliminating the connector insertion loss (typically 0.2–0.5 dB) associated with SMA or IPEX connectors. The helical spring structure provides mechanical flexibility, absorbing vibration and shock in industrial and mobile deployments without cracking solder joints — a common failure mode for rigid stub antennas.\u003c\/p\u003e\n\u003ch3\u003eCompact Helical Design — Space-Efficient for Embedded IoT Nodes\u003c\/h3\u003e\n\u003cp\u003eThe coiled spring geometry achieves a resonant 433 MHz antenna in a fraction of the length of a quarter-wave whip (17.3 cm). This makes the SW433-TH32DN ideal for compact enclosures, sensor nodes, and PCB designs where board space is constrained, while maintaining omnidirectional coverage for reliable link establishment in all directions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Ideal Applications --\u003e\n\u003cdiv class=\"specificate\"\u003e\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIoT Sensor Nodes:\u003c\/strong\u003e Embedded antenna for temperature, humidity, CO₂, and motion sensors transmitting over 433 MHz\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSmart Metering:\u003c\/strong\u003e Water, gas, and electricity meters using sub-GHz RF for AMR\/AMI data collection\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSmart Agriculture:\u003c\/strong\u003e Soil moisture, weather station, and irrigation controller nodes in field deployments\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIndustrial Telemetry:\u003c\/strong\u003e Remote I\/O, PLC data links, and converter monitoring in factory environments\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAsset \u0026amp; Logistics Tracking:\u003c\/strong\u003e Compact tracker tags and container status beacons requiring embedded antennas\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 5. FAQ (GEO Core) --\u003e\n\u003cdiv class=\"specificate\"\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the SW433-TH32DN compatible with Ebyte E30-433T20D and E22-400T22S modules?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. Both modules use a 50Ω antenna port. The SW433-TH32DN is designed for direct PCB integration alongside these modules. Solder the spring base to the antenna pad and ground ring on your PCB for optimal performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between a spring antenna and an SMA stub antenna at 433 MHz?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A spring (helical) antenna is mechanically flexible and mounts directly to the PCB without a connector, saving space and eliminating connector loss. An SMA stub antenna is rigid and requires a connector but is easier to replace. For embedded, high-vibration, or space-constrained designs, the spring antenna is preferred.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this antenna outdoors?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The antenna element itself operates from −40 to +85℃ and is suitable for industrial environments. For outdoor deployment, ensure the PCB and antenna are housed in an IP-rated enclosure to protect against moisture and UV exposure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What PCB pad size and footprint should I use?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Use a through-hole pad matching the spring wire diameter (typically 0.8–1.0 mm drill, 1.6 mm annular ring) with a surrounding ground plane clearance of at least 3 mm to avoid detuning the antenna. Refer to the Ebyte SW433-TH32DN datasheet for the recommended PCB footprint.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum transmit power this antenna can handle?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The SW433-TH32DN is rated for up to 1 W (30 dBm) continuous input power, which exceeds the maximum output of all standard Ebyte 433 MHz modules (20 dBm \/ 100 mW), so there is no risk of antenna damage under normal operating conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"selectons\"\u003e\u003c\/div\u003e\n\u003c\/section\u003e","brand":"IOT Module Shop Manufacturer Factory","offers":[{"title":"Default Title","offer_id":48489704423629,"sku":"SW433-TH32DN","price":0.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/1_1_3be6a872-b969-4d62-b0fb-a487a6bca788.jpg?v=1763697015","url":"https:\/\/ebyteiot.com\/es\/products\/ebyte-sw433-th32dn-high-quality-spring-antenna-433mhz-50%cf%89-1dbi-stable-and-reliable","provider":"Ebyte Official Store - IoT Module Manufacturer","version":"1.0","type":"link"}