--- product_id: 570087844 title: "Supco Tradefox Jumper King Bypass Low Voltage Thermostat to Activate The Circuit" brand: "supco" price: "¥26346" currency: JPY in_stock: true category: "Supco" url: https://www.desertcart.jp/products/570087844-supco-tradefox-jumper-king-bypass-low-voltage-thermostat-to-activate store_origin: JP region: Japan --- # 0–30V low voltage range 20 interchangeable adapter ends Built-in resettable fuse protection Supco Tradefox Jumper King Bypass Low Voltage Thermostat to Activate The Circuit **Brand:** supco **Price:** ¥26346 **Availability:** ✅ In Stock ## Summary > ⚡ Master HVAC diagnostics with the ultimate low-voltage jumper—never miss a beat! ## Quick Answers - **What is this?** Supco Tradefox Jumper King Bypass Low Voltage Thermostat to Activate The Circuit by supco - **How much does it cost?** ¥26346 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/570087844-supco-tradefox-jumper-king-bypass-low-voltage-thermostat-to-activate) ## Best For - supco enthusiasts ## Why This Product - Trusted supco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Fail-Safe Operation:** Resettable popper fuse ensures no shorts or damage—work confidently without battery dependency. - • **Ultimate Versatility:** Includes 20 magnetic, alligator, spade, and insulation piercing tips to tackle any HVAC troubleshooting scenario. - • **Hands-Free Efficiency:** Equipped with magnets and a fold-out hook for secure, hands-free operation during complex repairs. - • **Organized Portability:** Durable zip-up EVA case keeps all adapters and leads neatly stored and ready for on-the-go professionals. - • **Precision Circuit Control:** Innovative selector switch lets you activate any HVAC lead or circuit instantly for pinpoint diagnostics. ## Overview The Supco Tradefox Jumper King is a professional-grade low voltage thermostat bypass tool designed for HVAC technicians. Operating safely within 0–30V circuits, it features 20 interchangeable adapters and a built-in resettable fuse for reliable, battery-free troubleshooting of compressors, relays, and thermostat circuits. Its magnetic tips and fold-out hook enable hands-free use, all housed in a rugged zip-up case for field-ready convenience. ## Description Supco Tradefox's Jumper King Multi Jumper with Selector One hookup allows you to safely bypass any low voltage thermostat and activate the leads/circuit of your choice. Eliminates compressor short cycling and start the system safely when your ready to start it Innovative circuit selector switches to activate leads/circuits of your choosing at any timeResettable popper fuse - will never short outNo batteries required - powered by the low voltage in the A/C unitWorks on multi stage units including heat pumpsIncludes 20 interchangeable ends2 Spade Adapter6 Alligator Clamps6 Magnetic Tips6 Self Piercing Insulation Tips6 Jumper Leads1 Hard Zip-Up EVA Sectioned Case1 Jumper King Thermostat Bypass ToolEquipped with Magnets and Fold-Out Hook for Hands Free Work ## Features - Quickly bypass thermostats and activate HVAC circuits for fast troubleshooting and system diagnostics. - Includes interchangeable adapters such as magnetic tips, alligator clips, spade connectors, and self-piercing insulation probes. - Ideal for testing compressors, relays, contactors, and thermostat circuits during AC or heat pump service. - Designed for use on 0–30V HVAC control circuits with built-in resettable fuse protection. - Comes with 20 interchangeable ends and a durable zip-up carrying case for organized field service. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BHLMJNMR | | Best Sellers Rank | #111,105 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #104 in Home Thermostat Accessories | | Brand | Supco | | Brand Name | Supco | | Color | Orange | | Compatible Devices | HVAC systems, heat pumps, air conditioners | | Customer Reviews | 4.7 out of 5 stars 308 Reviews | | Item Weight | 0.78 Kilograms | | Manufacturer | Supco | | Measurement Type | Voltmeter | | Min. Operating Voltage | 1 Volts | | Minimum Operating Voltage | 1 Volts | | Model | TFXJK | | Part Number | TFXJK | | Power Source | Low Voltage | | Specification Met | CE | | UPC | 687152291489 | | Unit Count | 20.0 Count | | Upper Temperature Rating | 150 Degrees Fahrenheit | ## Product Details - **Brand:** Supco - **Color:** Orange - **Item Weight:** 0.78 Kilograms - **Min. Operating Voltage:** 1 Volts - **Power Source:** Low Voltage ## Images ![Supco Tradefox Jumper King Bypass Low Voltage Thermostat to Activate The Circuit - Image 1](https://m.media-amazon.com/images/I/71Yc6CmPaaL.jpg) ![Supco Tradefox Jumper King Bypass Low Voltage Thermostat to Activate The Circuit - Image 2](https://m.media-amazon.com/images/I/61+TWmQrVsL.jpg) ![Supco Tradefox Jumper King Bypass Low Voltage Thermostat to Activate The Circuit - Image 3](https://m.media-amazon.com/images/I/718DsFof6uL.jpg) ![Supco Tradefox Jumper King Bypass Low Voltage Thermostat to Activate The Circuit - Image 4](https://m.media-amazon.com/images/I/71VJqzTcm8L.jpg) ![Supco Tradefox Jumper King Bypass Low Voltage Thermostat to Activate The Circuit - Image 5](https://m.media-amazon.com/images/I/61cSrSjM2PL.jpg) ## Frequently Bought Together - Supco Tradefox Jumper King Bypass Low Voltage Thermostat to Activate The Circuit - HVAC Guys - The Fuse Saver | HVAC Circuit Tester | 3 AMP & 5 AMP Fuses | Fuse Tester for Circuit Breaker - UL Rated 24V AC/DC & 125/250V AC - Supco FPRO100 Furnace Pro Switch Clip --- ## 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.jp/products/570087844-supco-tradefox-jumper-king-bypass-low-voltage-thermostat-to-activate](https://www.desertcart.jp/products/570087844-supco-tradefox-jumper-king-bypass-low-voltage-thermostat-to-activate) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-11*