--- product_id: 21822822 title: "ELECTRONICS-SALON Panel Mount Momentary-Switch/Pulse-Signal Control Latching SPDT Relay Module,12V" brand: "electronics-salon" price: "£18.53" currency: GBP in_stock: true reviews_count: 11 category: "Electronics Salon" url: https://www.desertcart.co.uk/products/21822822-electronics-salon-panel-mount-momentary-switch-pulse-signal-control-latching store_origin: GB region: United Kingdom --- # 10A high-power relay Power-off state memory MCU programmable control ELECTRONICS-SALON Panel Mount Momentary-Switch/Pulse-Signal Control Latching SPDT Relay Module,12V **Brand:** electronics-salon **Price:** £18.53 **Availability:** ✅ In Stock ## Summary > 🔌 Power up your control game with smart, reliable switching! ## Quick Answers - **What is this?** ELECTRONICS-SALON Panel Mount Momentary-Switch/Pulse-Signal Control Latching SPDT Relay Module,12V by electronics-salon - **How much does it cost?** £18.53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/21822822-electronics-salon-panel-mount-momentary-switch-pulse-signal-control-latching) ## Best For - electronics-salon enthusiasts ## Why This Product - Trusted electronics-salon brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Customizable Firmware:** Built on PIC12F675 MCU, perfect for tech-savvy pros to tailor control logic to their needs. - • **Smart Power-Off Memory:** Automatically restores relay state after power loss—never lose your settings again. - • **Robust 10 Amp SPDT Relay:** Handles heavy-duty loads up to 10 Amps at 250VAC/24VDC with silver contacts for durability. - • **Versatile 4-Mode Control:** Supports onboard, single/double external momentary switches & pulse signals for ultimate flexibility. - • **Clear LED Status Indicators:** Instant visual feedback on relay set/reset actions keeps you in control at a glance. ## Overview The Electronics-Salon MD-D1022A/12V is a panel-mount latching SPDT relay module featuring a 10 Amp Hongfa power relay, four versatile control modes including onboard and external momentary switches, and pulse signal input. It boasts power-off state memory to retain relay position after outages, LED indicators for clear status, and a PIC12F675 microcontroller allowing firmware customization. Compact and robust, it’s designed for professional-grade electrical control applications. ## Description Panel Mount Momentary-Switch / Pulse-Signal Control Latching SPDT Relay Module. Part Number: MD-D1022A/12V The item no paper instructions, please download the PDF file, and before buying please read the file: https://images-na.ssl-images-desertcart.com/images/I/A1y3q2+xqYL.pdf Features: •This item has been assembled, and electrical test passed. •Support on board momentary switch, single external momentary switch, double external momentary switches and pulse signal, four control modes. •LED indication for relay set and reset action. •Hongfa JQC-3FF 10 Amp SPDT power relay. •Power off relay state memory, when the power on again, relay switch will revert to its previous state. •The control program based on MCU PIC12F675, this is a flash microcontroller, if you are familiar PIC firmware, you can redesign the program. •Panel mount version, size: 72.5 x 47.4 x 18mm (L x W x H) Electrical Parameters: •Operating voltage: 9.5 to 19VDC. •Operating current: 50mA, at 12VDC. •Relay number: JQC-3FF 12VDC. •Relay switch type: SPDT. •Relay switch capacity: 10Amp at 250VAC/24VDC. •Pulse mode signal level: High 3~5V, Low 0V. Pulse signal must hold time: High level 1mS minimum, Low level 1000mS minimum. Pulse rising is valid. Terminal block characteristic: •Wire range 26-12AWG •Mechanical Torque 0.4Nm(3.5Lb-In.) •Strip length 7mm •Dimensions Pitch 5.0mm(.197") •Screws M2.5 Review: Simple latch, multiple input options to trigger, works well. - I like the separate set/reset inputs along with the pulsing input or toggle. It works well and seems well built and simple. Through-hole design can be repaired by the hobbyist. Review: Great product & value - Although the product ships without documentation, it's easy to download and print what you need. Very versatile board, and it does exactly what it says it will do. As a bonus, the terminals are big enough to squeeze two 16AWG wires into! ## Features - This item has been assembled, and electrical test passed. - Support on board momentary switch, single external momentary switch, double external momentary switches and pulse signal, four control modes. - LED indication for relay set and reset action. 10 Amp SPDT power relay. - Power off relay state memory, when the power on again, relay switch will revert to its previous state. - The control program based on MCU PIC12F675, this is a flash microcontroller, if you are familiar PIC firmware, you can redesign the program. Panel mount version, size: 72.5 x 47.4 x 18mm (L x W x H) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B015MRQNXS | | Best Sellers Rank | #255,690 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,122 in Pushbutton Switches | | Brand Name | Electronics-Salon | | Coil Voltage | 12 Volts | | Connector Type | Screw | | Contact Current Rating | 10 Amps | | Contact Material | Silver | | Contact Type | Spdt | | Current Rating | 10 Amps | | Customer Reviews | 4.1 4.1 out of 5 stars (78) | | Manufacturer | Electronics-Salon | | Maximum Switching Current | 10 Amps | | Maximum Switching Voltage | 12 Volts | | Minimum Switching Voltage | 9.5 Volts (DC) | | Mounting Type | Panel Mount | | Number of Terminals | 1 | | Operation Mode | Electrical | | Part Number | MD-D1022A/12V-1 | | Specification Met | Ma | ## Product Details - **Connector Type:** Screw - **Contact Material:** Silver - **Contact Type:** Spdt - **Current Rating:** 10 Amps - **Mounting Type:** Panel Mount ## Images ![ELECTRONICS-SALON Panel Mount Momentary-Switch/Pulse-Signal Control Latching SPDT Relay Module,12V - Image 1](https://m.media-amazon.com/images/I/811ih6jFwUL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Simple latch, multiple input options to trigger, works well. *by J***K on December 20, 2021* I like the separate set/reset inputs along with the pulsing input or toggle. It works well and seems well built and simple. Through-hole design can be repaired by the hobbyist. ### ⭐⭐⭐⭐⭐ Great product & value *by D***Y on August 29, 2019* Although the product ships without documentation, it's easy to download and print what you need. Very versatile board, and it does exactly what it says it will do. As a bonus, the terminals are big enough to squeeze two 16AWG wires into! ### ⭐⭐⭐⭐⭐ Excellent board! *by G***S on December 28, 2025* This is a well built and well documented board that I really appreciate being offered here. I've already planned including it in a future project that I'll be working on in the next couple of months. ## Frequently Bought Together - ELECTRONICS-SALON Panel Mount Momentary-Switch/Pulse-Signal Control Latching SPDT Relay Module,12V - ELECTRONICS-SALON Panel Mount Momentary-Switch/Pulse-Signal Control Latching DPDT Relay Module,12V - HiLetgo 2pcs 12V Single Bistable Self-Locking Relay Module Push to Start and Stop --- ## 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.co.uk/products/21822822-electronics-salon-panel-mount-momentary-switch-pulse-signal-control-latching](https://www.desertcart.co.uk/products/21822822-electronics-salon-panel-mount-momentary-switch-pulse-signal-control-latching) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-19*