> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # Floodgate Power Switch (XT30, Current Sensing) **Type:** Product page · **SKU:** GB-3103-0005-0001 · **Brand:** [goBilda](https://core-electronics.com.au/brands/gobilda) **Page:** https://core-electronics.com.au/gobilda-floodgate-power-switch-xt30-current-sensing-mosfet-50a.html ([markdown](https://core-electronics.com.au/gobilda-floodgate-power-switch-xt30-current-sensing-mosfet-50a.html.md)) Open the floodgates to more performance, data, and ease-of use in your projects with the XT30 Current-Sensing Floodgate..... ## Pricing - **Price:** $98.60 (inc GST) — $89.64 AUD, exc GST - **Quantity discounts:** 6+ $86.95 (exc GST) · 12+ $85.15 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 25 and Sep 01. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=GB-3103-0005-0001:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/GB-3103-0005-0001:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description Open the floodgates to **more performance, data, and ease-of use** in your projects with the XT30 Current-Sensing Floodgate Power Switch! It’s a robust **mosfet-based rocker switch** designed from the heft of FIRST Tech Challenge (FTC) experience in the goBILDA® R&D lab. ## A Rocker Switch with (Almost) No Resistance The power switches that are most commonly used in low-voltage robotics applications flow current through two strips of conductive material that move into and out of contact with one another based on the position of the “switch” that you interact with. Those common “contact-based rocker switches” are bulletproof and simple—and they come with a key disadvantage: the contact formed by those strips is imperfect, and that imperfect contact creates an **electrical resistance** through which your battery voltage will “sag” more under load, and your batteries will die sooner! According to our testing, for example, a contact-based rocker switch sees 30mO of resistance, and since a new battery generally comes with an internal resistance value of 100mO, the addition of 30mO via a switch is significant. This Floodgate Power Switch, however, doesn't rely on the switch you flip to carry the current! Instead, it commands the internal control architecture to activate a set of very powerful **mosfets**: extremely powerful transistors that allow current to flow only when commanded. These mosfets—which provide the magic behind many electrical gadgets you use day-to-day—add much less resistance than contact-based rocker switches. Compared to those switches’ 30mO internal resistance value, the mosfet-based Floodgate only has **3mO**, and this **resistance will not increase over time**. ## Data and Protection Features The Flootgate’s reduced resistance creates **ultra-dependable brawn** that comes with a suite of **versatile and safety-conscious brains**: ### Smart Analog Current Monitoring The Floodgate has a **0-3.3V analog output**, which conveys the value of the current that is flowing through the switch. You can read this with a microcontroller or robotics control system to **gain insight into the overall power draw of your robot** and make smarter decisions about what to prioritize within your battery’s power budget. ### A Fortress of Electrical Safety When we packed the Floodgate with the most robust safety features we could imagine, we refused to settle! 1. We massively over-designed the Floodgate’s electrical control architecture and mosfet array. Its many smart features, and a dual mosfet array capable of pushing over 400A of current, achieve a **superbly high safety factor** beyond what was required. It's absolutely glowing with safety, and that's why the Floodgate **shines green** to indicate "all systems nominal!" 2. It boasts a **50A “smart” current limit**. If 50A of current draw is detected across the switch for even 1µs, the switch will disable the output, and the lights will go from green to red. After 1 second, the switch will attempt to re-enable the output. This feature performs double-duty as a traditional current limit as well as **short-circuit protection**: if your wiring has a shorted circuit, the Floodgate will continue to retry to enable the output until the short is cleared. Each time the output is enabled for that smidgeon of time, the resulting smidgeon of current will flow to the short and keep your robot, actuators, wiring, and batteries safe, in spite of the short-circuit event. 3. The Flootgate even rocks a **60A built-in fuse** as a final protection method—if the current limit were to somehow fail, and the switch is continuously carrying more than 60A, this fuse will break. ### Specs | Included Hardware | [20mm Length M4 Socket Head Screw](https://core-electronics.com.au/m4-x-0-7mm-zinc-plated-socket-head-screw-20mm-length-25-pack/) x 4, [M4 x 0.7mm Nylock Nut](https://core-electronics.com.au/m4-x-0-7mm-nylock-nut/) x 4 | |---|---| | Input Voltage Range | 5V ~ 21V | | Resistance | 3mO | | Resettable Current Limit | 50A | | Internal Fuse Rating | 60A | | Current Draw (Output and LED Enabled) | 16mA | | Current Draw (Output Enabled, LED Disabled) | 2mA | | Current Draw (Output Disabled) | 0.0005mA | | Power Input Connector | XT30 (FH-MC) | | Power Output Connector | XT30 (MH-FC) | | Current Sensor Connector | 3-Pos JST PH \[FH-MC\] | | Current Sensor Analog Voltage Output | 0V ~ 3.3V | | Current Sensor Max Measured Current | 50A | ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/G/B/GB-3103-0005-0001-1.jpg)