--- product_id: 56864898 title: "40A Relay" brand: "baomain" price: "EC$130" currency: XCD in_stock: true reviews_count: 9 category: "Baomain" url: https://grenada.desertcart.com/products/56864898-40a-relay store_origin: GD region: Grenada --- # 40A high current capacity Ultra-fast 10ms switching Copper base for superior heat dissipation 40A Relay **Brand:** baomain **Price:** EC$130 **Availability:** ✅ In Stock ## Summary > ⚡ Elevate your industrial control game with silent, powerful switching! ## Quick Answers - **What is this?** 40A Relay by baomain - **How much does it cost?** EC$130 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [grenada.desertcart.com](https://grenada.desertcart.com/products/56864898-40a-relay) ## Best For - baomain enthusiasts ## Why This Product - Trusted baomain brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power Up with Precision:** Seamlessly controls 3-phase AC loads from 24V to 480V with a simple DC trigger—perfect for any industrial setup. - • **Stay Cool Under Pressure:** Thick pure copper base plate guarantees efficient heat transfer, extending relay lifespan during continuous heavy use. - • **Built for Heavy-Duty Performance:** Handles up to 40 Amps with zero mechanical wear, ensuring silent, spark-free operation even under high-frequency switching. - • **Plug & Play Industrial Reliability:** Equipped with 8 secure screw terminals and a clear flame-retardant cover for safe, dust-free wiring and instant LED status monitoring. - • **Engineered for Automation Excellence:** Ideal for CNC machinery, temperature controllers, and industrial ovens—empower your automation with trusted solid-state switching. ## Overview The BAOMAIN JGX-3340A is a robust 3-phase solid state relay designed for industrial automation, capable of switching up to 40A AC loads (24-480V) with a fast 10ms response. Featuring a pure copper base for superior heat dissipation, secure screw terminals, and LED status indicators, it ensures reliable, silent operation in CNC machinery, temperature controllers, and heavy-duty industrial applications. ## Description BAOMAIN 3 Phase Solid State Relay, JGX-3340A DC to AC 40A SSR, Three Phase Relay for CNC Machinery, Temperature Controller, Industrial Automation: desertcart.com: Industrial & Scientific Review: Great for my purpose. - Needed a heavy duty SSR to control a line-voltage baseboard heater with an off-the-shelf thermostat - one that went down to 35 degrees. The mechanical ones I've looked at for this purpose, have at least one picture of some catastrophic burn-out failure, and using these in a remote cabin, wasn't comfortable having something like that around - attended or not. These transfer the 240VAC power feed to the heaters while the control side from the thermostat is 12 VDC. Have two of them hooked up and so far no issues at all - no sound - very clean and efficient. They are oversized for the application but the cost was very reasonable. Did mount them on heatsinks nonetheless. 11/25: Well, had one that finally died, not completely, but for last two years, had issues with intermittent operation. Always thought maybe it was bad coating on the terminals, but after dealing with intermittent operation yet again, i substituted the original with a spare I had, everything working properly. The other 5 I have for same application are working fine. this one just has some internal issue so will order another to have on hand as a spare. Review: Good relay. - I used this relay for a project I was working on, and it works great for the purpose. One issue: On the original relay I was sent, the V+ terminal was totally disconnected from inside of the relay. The whole post would come out of the plastic housing. desertcart took care of it and quickly shipped a replacement, and the replacement has passed all of the tests I put it against, and appears to be working great. ## Features - 【3-Phase Power Control】 Reliably switches AC 24-480V loads using a simple DC 4-32V signal. Compatible with 110V, 220V, and 380V systems for stable ON/OFF switching (Note: Not a voltage regulator) - 【High 40A Capacity】 Safely manages up to 40 Amps with a rapid response time of 10ms. Ideal for high-frequency switching without the sparks or noise of traditional mechanical contactors - 【Superior Heat Dissipation】 Built with a thickened pure copper base plate for efficient thermal transfer. Maintains stable performance and extends service life even during continuous heavy-duty operation - 【Safe & Easy Monitoring】 Features 8 secure screw terminals for stable wiring and a built-in LED indicator for instant signal status. Includes a transparent flame-retardant cover for dust and touch protection - 【Industrial Applications】 A must-have component for CNC machinery, electric furnace thermostats, industrial ovens, and automation systems where precise temperature and motor control are required ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01JI21U1S | | Best Sellers Rank | #397,639 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #221 in Solid State Relays | | Brand | Baomain | | Brand Name | Baomain | | Coil Voltage | 32 volts_of_direct_current | | Connector Type | Screw | | Contact Current Rating | 40 A | | Contact Material | Gold Flash | | Contact Type | Solid-state | | Current Rating | 40 A | | Customer Reviews | 4.4 out of 5 stars 34 Reviews | | Manufacturer | Baomain Electric Co.,Ltd | | Maximum Switching Current | 40 A | | Model | JGX-3340A | | Mounting Type | Panel/Direct mount | | Operation Mode | Automatic | | Part Number | JGX-3340A | | Specification Met | Ma | | Wattage | 19200 watts | ## Product Details - **Connector Type:** Screw - **Contact Material:** Gold Flash - **Contact Type:** Solid-state - **Current Rating:** 40 Amps - **Mounting Type:** Panel/Direct mount ## Images ![40A Relay - Image 1](https://m.media-amazon.com/images/I/71NINmdnrRL.jpg) ## Questions & Answers **Q: Is this a random or zero crossing type SSR?** A: I do not know. I haven't checked. I suspect it is a random triggering because of its cost. **Q: Could this SSR work for 240vac split phase (usa)? that is not three phase ?** A: I use these in several applications - mainly to use a off-the-shelf low-voltage thermostat to control 220V baseboard heaters. Using a cheap 12vdc power adapter to provide input through the thermostats, and then I'm switching both hots, and the neutral via the SSR prior to the baseboard - never had a lot of confidence in the line-voltage thermostats they offered, and I wanted a garage thermostat that I could set down as low as 35 degrees. I did install them with heat sinks but I'm not pushing them anywhere near their 40A max. **Q: Does this relay makes a "click" sound when switching on?** A: No there aren't any mechanical parts to click in an SSR as in a relay. **Q: are they zero crossing or random firing** A: They are Zero Crossing. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great for my purpose. *by J***N on February 8, 2021* Needed a heavy duty SSR to control a line-voltage baseboard heater with an off-the-shelf thermostat - one that went down to 35 degrees. The mechanical ones I've looked at for this purpose, have at least one picture of some catastrophic burn-out failure, and using these in a remote cabin, wasn't comfortable having something like that around - attended or not. These transfer the 240VAC power feed to the heaters while the control side from the thermostat is 12 VDC. Have two of them hooked up and so far no issues at all - no sound - very clean and efficient. They are oversized for the application but the cost was very reasonable. Did mount them on heatsinks nonetheless. 11/25: Well, had one that finally died, not completely, but for last two years, had issues with intermittent operation. Always thought maybe it was bad coating on the terminals, but after dealing with intermittent operation yet again, i substituted the original with a spare I had, everything working properly. The other 5 I have for same application are working fine. this one just has some internal issue so will order another to have on hand as a spare. ### ⭐⭐⭐⭐⭐ Good relay. *by A***S on May 7, 2022* I used this relay for a project I was working on, and it works great for the purpose. One issue: On the original relay I was sent, the V+ terminal was totally disconnected from inside of the relay. The whole post would come out of the plastic housing. Amazon took care of it and quickly shipped a replacement, and the replacement has passed all of the tests I put it against, and appears to be working great. ### ⭐⭐⭐⭐⭐ Great product for controlling Electric Heaters using PWM *by T***C on August 15, 2021* This product is reliable and zero crossing so no issues. Love it! ## Frequently Bought Together - Baomain 3 Phase Solid State Relay JGX-3340A 4-32 VDC Input 480VAC 40 Amp Output DC/AC - Baomain Heat Sinks Aluminum for 3 Phase Solid State Relay 10A-100A 110mm X 100mm X 80mm - Silver Thermal Grease CPU Heatsink Compound Paste Syringe (5-pack) --- ## 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://grenada.desertcart.com/products/56864898-40a-relay](https://grenada.desertcart.com/products/56864898-40a-relay) --- *Product available on Desertcart Grenada* *Store origin: GD* *Last updated: 2026-11-09*