--- product_id: 54940104 title: "DC 12V Delay Relay Module with Adjustable Timer, Switch Module for Turn On/Off Control, Opto-couplers Isolator, 0-25 Second Delay Timer Board" brand: "walfront" price: "฿933" currency: THB in_stock: true reviews_count: 13 category: "Walfront" url: https://www.desertcart.co.th/products/54940104-dc-12v-delay-relay-module-with-adjustable-timer-switch-module store_origin: TH region: Thailand --- # 0-25s adjustable delay 10A high current rating 12V DC coil voltage DC 12V Delay Relay Module with Adjustable Timer, Switch Module for Turn On/Off Control, Opto-couplers Isolator, 0-25 Second Delay Timer Board **Brand:** walfront **Price:** ฿933 **Availability:** ✅ In Stock ## Summary > ⏳ Power your projects with precision timing — don’t let your automation lag behind! ## Quick Answers - **What is this?** DC 12V Delay Relay Module with Adjustable Timer, Switch Module for Turn On/Off Control, Opto-couplers Isolator, 0-25 Second Delay Timer Board by walfront - **How much does it cost?** ฿933 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/54940104-dc-12v-delay-relay-module-with-adjustable-timer-switch-module) ## Best For - walfront enthusiasts ## Why This Product - Trusted walfront brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Triggering:** Compatible with both high and low-level signals, perfect for diverse industrial and smart home setups. - • **Robust Power Handling:** Supports up to 10 Amps with silver alloy contacts ensuring reliable, high-current switching. - • **Opto-coupler Isolation:** Enhanced electrical isolation protects your sensitive circuits and boosts system stability. - • **Precision Timing Control:** Adjust delay from 0 to 25 seconds with a smooth potentiometer dial for tailored automation. - • **Wide Application Spectrum:** Ideal for robotics, alarm systems, car lamp delays, and intelligent automation projects. ## Overview The Walfront DC 12V Delay Relay Module offers an adjustable 0-25 second delay timer with a normally open relay and 10A current capacity. Featuring opto-coupler isolation and compatibility with both high and low-level triggers, it’s engineered for reliable, repeatable switching in industrial control, smart home automation, and electronic development projects. ## Description DC 12V Delay Relay Module with Adjustable Timer, Switch Module for Turn On/Off Control, Opto-couplers Isolator, 0-25 Second Delay Timer Board : desertcart.co.uk: DIY & Tools Review: Worked like a charm - Followed the photos here as the instructions were t the best, but overall very happy. Works well and seems good quality. Review: Works Great - Great little product. I wanted a relay that would stay on after the signal had stopped. I’m using it as part of a alarm system for driveway beams. ## Features - NORMALLY OPEN MODULE-- 12V trigger delay normally open relay module, repeatedly triggering effective - WITH POTENTIOMETER-- Delay time can be adjusted by potentiometer, default 0-25 seconds, if you need more time, simply replace a larger capacitance or potentiometer - FUNCTION-- Power supply terminal has anti-reverse diode for - WIDE APPLICATION-- Trigger can be high level or low level signals, suitable for industrial control, the module can be triggered repeatedly - USED FOR-- It can be used in robotics, car lamp delay, intelligent product development, automation equipment, PLC development, intelligent home, burglar alarm delay, and development of electronic ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0761XBPT2 | | Brand | Walfront | | Coil Voltage | 12 Volts (DC) | | Connector Type | Clamp | | Contact Current Rating | 10 Amps | | Contact Material | Silver Alloy | | Contact Type | Normally Open | | Country Of Origin | China | | Current Rating | 10 Amps | | Customer Reviews | 4.0 4.0 out of 5 stars (256) | | Item Weight | 0.02 Kilograms | | Manufacturer | Walfront | | Manufacturer Part Number | Walfrontf5r0cut9y4 | | Maximum Switching Voltage | 12 Volts | | Minimum Switching Voltage | 12 Volts (DC) | | Model Number | EXPSFN019067 | | Mounting Type | DIN Rail Mount | | Number of Terminals | 2 | | Operating Time | 25 Seconds | | Operation Mode | Automatic | | Release Time | 25 Seconds | | UPC | 663862243048 | ## Product Details - **Connector type:** Clamp - **Contact material:** Silver Alloy - **Contact type:** Normally Open - **Current rating:** 10 Amps - **Mounting type:** DIN Rail Mount ## Images ![DC 12V Delay Relay Module with Adjustable Timer, Switch Module for Turn On/Off Control, Opto-couplers Isolator, 0-25 Second Delay Timer Board - Image 1](https://m.media-amazon.com/images/I/71P23fIoy3S.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked like a charm *by C***R on 3 August 2021* Followed the photos here as the instructions were t the best, but overall very happy. Works well and seems good quality. ### ⭐⭐⭐⭐⭐ Works Great *by K***V on 10 April 2022* Great little product. I wanted a relay that would stay on after the signal had stopped. I’m using it as part of a alarm system for driveway beams. ### ⭐⭐⭐⭐ Nice little unit, but has limitations *by E***O on 5 June 2019* I have tested this module thoroughly and can now describe its behaviour. I tested the unit on my workbench, while connected to a 12V DC power supply (12.14V to be exact). When operating from this power supply, the current requirements are as follows: • Quiescent (standby) current : 6.5mA • Operating current (relay energised) : 26-30mA • Opto-coupler drive current : adds another 10mA I started drawing out the circuit diagram of the module, but didn't get very far. At least, I have discovered that there's a series diode for reverse-polarity protection at the 'VCC' power input terminal. The 'SVCC' signal terminal is routed to the anode of an opto-isolator via a 1k resistor, and the 'SIG' terminal is directly connected to the cathode of the same diode (see my sketch). Hence, you can elect to have the unit triggered either by the application of +12V to the 'SVCC' terminal, or by connecting the 'SIG' terminal to GND - provided you hard-wire the opposite signal terminal to the opposite power rail. I have yet to trace where the output of the opto-coupler connects, but it doesn't matter. Suffice it to say that when the opto-coupler diode is driven, the relay is IMMEDIATELY energised. Then, when current to the opto-isolator input is interrupted, the time delay starts counting down. If and when the preset time is reached, the relay de-energises. If the signal to the opto-coupler is re-applied before the delay time is reached, the 'countdown' starts again from the beginning. In summary, this module behaves as a 'run back timer'. That is: the relay energises immediately upon receiving the trigger input, and de-energises n seconds after the trigger is removed. It cannot be used as a 'delayed start' timer - which, unfortunately, is what I bought it for. (I need a timer module to delay switch-on of a Mobius dashcam until the car's power supply has stabilised after starting the engine; else the camera locks up.) One anomaly I discovered with this unit is that when connecting the permanent 12V feed to the 'VCC' terminal (while leaving the opto-coupler input disconnected), there's about a 50/50 chance whether the unit starts up with the relay energised. In my mind, this is erroneous behaviour. This means that you can't switch the system on/off via the 'VCC' input and expect a reliable outcome. Logically, if the signal input(s) are not driven, then the unit should NEVER start up with the relay energised. Thankfully, if it does start up with the relay energised, it will de-energise once the preset time delay has expired and will then work correctly from that point onwards. Finally, a word about the time delay potentiometer setting. I discovered that rotating the trim pot clockwise DECREASES the time delay - this is counter-intuitive. Also, if you turn the pot too far clockwise, it disables the device altogether, and the relay will not operate. EVER! Perhaps this is the condition that some reviewers have experienced, and declared their units to be non-functional. ## Frequently Bought Together - DC 12V Delay Relay Module Board 0-25second Adjustable Timer Relay Turn On/Turn Off Switch Module with Opto-couplers Isolator - DC 5V/12V/24V Delay Timer Relay, Self-locking Delay On Off Time Switch Super 555 Timer (DC12V) - 12V Timer Relay Adjustable Automation Control Switch Module LED Display --- ## 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.th/products/54940104-dc-12v-delay-relay-module-with-adjustable-timer-switch-module](https://www.desertcart.co.th/products/54940104-dc-12v-delay-relay-module-with-adjustable-timer-switch-module) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-05-09*