--- product_id: 361228457 title: "NooElec SMA DC Block In-Line 50 Ohm 50kHz-8GHz Connector Blocks DC Voltage from your Radio or RF Test Equipment. Ultra-Low Insertion Loss (<0.3dB to 6GHz) and 2 Watts Maximum Power" brand: "nooelec" price: "$54.81" currency: USD in_stock: true reviews_count: 5 category: "Noo Elec" url: https://www.desertcart.us/products/361228457-nooelec-sma-dc-block-in-line-50-ohm-50khz-8ghz store_origin: US region: United States of America --- # Blocks up to 50V DC voltage 50kHz-8GHz ultra-wide freq range Ultra-low insertion loss <0.3dB NooElec SMA DC Block In-Line 50 Ohm 50kHz-8GHz Connector Blocks DC Voltage from your Radio or RF Test Equipment. Ultra-Low Insertion Loss (<0.3dB to 6GHz) and 2 Watts Maximum Power **Brand:** nooelec **Price:** $54.81 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate your RF game with precision blocking power! ## Quick Answers - **What is this?** NooElec SMA DC Block In-Line 50 Ohm 50kHz-8GHz Connector Blocks DC Voltage from your Radio or RF Test Equipment. Ultra-Low Insertion Loss (<0.3dB to 6GHz) and 2 Watts Maximum Power by nooelec - **How much does it cost?** $54.81 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/361228457-nooelec-sma-dc-block-in-line-50-ohm-50khz-8ghz) ## Best For - nooelec enthusiasts ## Why This Product - Trusted nooelec brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Broadband Compatibility:** Operate confidently across an expansive 50kHz to 8GHz spectrum—future-proof your setup. - • **Seamless Signal Integrity:** Maintain crystal-clear RF signals with <0.3dB insertion loss up to 6GHz—because every decibel counts. - • **Trusted Support & Warranty:** Enjoy peace of mind with a full 2-year direct support service from NooElec—because reliability matters. - • **Powerful Voltage Protection:** Safeguard your sensitive radio gear by blocking DC voltages up to 50V effortlessly. - • **Precision Laser-Etched Markings:** Durable, fade-resistant labels ensure your gear stays organized and professional-looking for years. ## Overview The NooElec SMA DC Block is a compact, high-performance inline coaxial connector designed to block DC voltages up to 50V while maintaining ultra-low insertion loss (<0.3dB to 6GHz) across a wide frequency range of 50kHz to 8GHz. Featuring laser-etched markings for durability and backed by a 2-year manufacturer support, it’s the essential accessory for professional-grade radio and RF test equipment setups. ## Description A high-quality in-line SMA DC Block. 50kHz-8GHz operation. The maximum power is 2W and maximum blocking voltage is 50V. Insertion loss of <0.3dB below 6GHz and <0.8dB below 8GHz. Max VSWR is <1.2 below 6GHz and <1.3 below 8GHz. Laser-etched labeling. Full 2 year support & service! Review: Parfait ! - Accessoire qui fonctionne parfaitement bien. Discret et esthétique, il trouve sa place très facilement dans une installation SDR. Je recommande à 100%. Review: 安全性の確保 - ＳＤＲ用の保護とスペアナの保護に使っています。 もう少し長さが短いと使い勝手が良いのですが、長過ぎます。 ## Features - A high-quality in-line SMA DC Block designed for operation from 50kHz-8GHz - Designed to block a voltage of up to 50V and for a maximum RF power of 2W - Insertion loss of less than 0.3dB all the way up to 6GHz - The outer markings are laser-etched to ensure longevity of the labeling for the life of the device - Full 2 year support & service direct through Nooelec ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07YYLHJKS | | Best Sellers Rank | #97,678 in Electronics ( See Top 100 in Electronics ) #210 in Radio Communication Products | | Brand | NooElec | | Color | Silver | | Colour | Silver | | Compatible Devices | Cell Phones, Game Consoles, Headset, Tablets, Laptop, Cameras, Amplifiers, Speakers, Monitors, Projectors, PC, MP3 Players, Musical Instruments, Printers, GPS | | Compatible devices | Cell Phones, Game Consoles, Headset, Tablets, Laptop, Cameras, Amplifiers, Speakers, Monitors, Projectors, PC, MP3 Players, Musical Instruments, Printers, GPS Compatible devices Cell Phones, Game Consoles, Headset, Tablets, Laptop, Cameras, Amplifiers, Speakers, Monitors, Projectors, PC, MP3 Players, Musical Instruments, Printers, GPS See more | | Connector Type | Coaxial | | Connector type | Coaxial | | Current Rating | 50 Amps | | Customer Reviews | 4.5 out of 5 stars 215 Reviews | | Finish | Laser | | Input Voltage | 50 Volts | | Item Dimensions | 10 x 10 x 20 millimeters | | Item Weight | 5 Grams | | Item dimensions L x W x H | 10 x 10 x 20 millimeters | | Manufacturer | NooElec | | Mfr Part Number | 100816 | | Model Number | Nooelec 8GHz SMA DC Block | | Nominal Power | 2 Watts | | Number of Items | 1 | | Number of Ports | 1 | | Package Quantity | 1 | | Power Plug Type | No Plug | | Specific Uses For Product | Antenna | | Specific uses for product | Antenna | | UPC | 616469146625 | | Warranty Type | Limited | ## Product Details - **Colour:** silver - **Connector type:** Coaxial - **Item dimensions L x W x H:** 10 x 10 x 20 millimeters - **Specific uses for product:** Antenna ## Images ![NooElec SMA DC Block In-Line 50 Ohm 50kHz-8GHz Connector Blocks DC Voltage from your Radio or RF Test Equipment. Ultra-Low Insertion Loss (<0.3dB to 6GHz) and 2 Watts Maximum Power - Image 1](https://m.media-amazon.com/images/I/61P600j7t3L.jpg) ![NooElec SMA DC Block In-Line 50 Ohm 50kHz-8GHz Connector Blocks DC Voltage from your Radio or RF Test Equipment. Ultra-Low Insertion Loss (<0.3dB to 6GHz) and 2 Watts Maximum Power - Image 2](https://m.media-amazon.com/images/I/615z+VgxBSL.jpg) ## Questions & Answers **Q: Is this an inner/outer dc block? in other words, does it block dc through the center conductor and the through the outer shield?** A: There is no way for it to block power through the outer shield as there is no insulator on the exterior metal. Power is only blocked through the center connection. **Q: Does this go in between the lna and the sdr or betwen the lna and the antenna ?** A: Hi, it depends on what you are using it for! If you contact us at support.nooelec.com with details we'll be happy to help, thanks :) **Q: Is this what you use between noaa and goes lnas and the sdrs nooelec makes? is it enough to use the power plugs for the lna's?** A: Its to protect your SDR from the power an LNA uses that might feed back through the antenna connection. For that it's worked great for me. **Q: which way do I connect this?** A: Doesn't matter. Thanks ## Customer Reviews ### ⭐⭐⭐⭐⭐ Parfait ! *by N***1 on 10 May 2020* Accessoire qui fonctionne parfaitement bien. Discret et esthétique, il trouve sa place très facilement dans une installation SDR. Je recommande à 100%. ### ⭐⭐⭐⭐ 安全性の確保 *by H***ー on 20 July 2022* ＳＤＲ用の保護とスペアナの保護に使っています。 もう少し長さが短いと使い勝手が良いのですが、長過ぎます。 ### ⭐⭐⭐⭐⭐ Matches Spec *by Z***S on 4 February 2024* Remember, these are for SHORT TERM use. You do not use them at the top of it's rated DC power while doing TX or RX for long periods (multiple hours), They will get hot, and that will impact your signal. ## Frequently Bought Together - NooElec SMA DC Block in-Line 50 Ohm 50kHz-8GHz Connector Blocks DC Voltage from Your Radio or RF Test Equipment. Ultra-Low Insertion Loss (<0.3dB to 6GHz) and 2 Watts Maximum Power - Nooelec Lana - Ultra Low-Noise Amplifier (LNA) Module for RF & Software Defined Radio (SDR) with Enclosure & Accessories. Wideband 20MHz-4000MHz Frequency Capability with Bias Tee & USB Power Options - SDTC Tech 5pcs Coaxial Coax Cable Assembly SMA Male to SMA Male Antenna Extender Cable Adapter Jumper(6 inch/15cm) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/361228457-nooelec-sma-dc-block-in-line-50-ohm-50khz-8ghz](https://www.desertcart.us/products/361228457-nooelec-sma-dc-block-in-line-50-ohm-50khz-8ghz) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-10*