---
product_id: 424907755
title: "BT41D4 Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase)"
brand: "blackt electrotech"
price: "COP 127231"
currency: COP
in_stock: true
reviews_count: 5
category: "Blackt Electrotech"
url: https://www.desertcart.co/products/424907755-bt41d4-digital-timer-switch-relay-din-rail-25-amps-programmable
store_origin: CO
region: Colombia
---

# 16 programmable ON/OFF cycles 25A high load capacity 60-day backup battery BT41D4 Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase)

**Brand:** blackt electrotech
**Price:** COP 127231
**Availability:** ✅ In Stock

## Summary

> ⚙️ Automate like a pro — never miss a beat with Blackt Electrotech BT41D4!

## Quick Answers

- **What is this?** BT41D4 Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase) by blackt electrotech
- **How much does it cost?** COP 127231 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/424907755-bt41d4-digital-timer-switch-relay-din-rail-25-amps-programmable)

## Best For

- blackt electrotech enthusiasts

## Why This Product

- Trusted blackt electrotech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Powerhouse Performance:** Handles heavy-duty 25A resistive loads, perfect for streetlights, pumps, and commercial gear.
- • **Seamless Manual Override:** Switch between AUTO and MANUAL modes effortlessly to suit your dynamic needs.
- • **Uninterrupted Reliability:** Built-in backup battery safeguards your settings through power outages—no resets, no hassle.
- • **Space-Savvy DIN Rail Design:** Compact, sleek form factor fits snugly into your electrical panel without crowding.
- • **Precision Scheduling Mastery:** Customize up to 16 daily ON/OFF programs with 7-day flexibility for ultimate control.

## Overview

The Blackt Electrotech BT41D4 is a robust, programmable digital timer switch designed for single-phase AC 220V systems. Supporting up to 16 ON/OFF programs with 7-day scheduling, it offers precise automation for residential, commercial, and agricultural applications. Its 25A contact capacity handles high loads reliably, while a built-in backup battery ensures settings persist through outages. Compact DIN rail mounting and flexible manual override modes make it a versatile, space-efficient solution for smart power management.

## Description

New BlackT Electrotech AC 220V 25A Digital Programmable Timer Switch. Switch ON/OFF automatically various of electric equipments according to the fixed time. Ideal for home appliance,agriculture facilities,broadcasting equipment,etc. usage. AC 220V 25A digital programmable timer switch. Switch ON/OFF automatically various of electric equipments according to the fixed time. Ideal for home appliance,agriculture facilities,broadcasting equipment,etc. usage. Specifications: *Display: LCD *Color: white *Material: ABS *Frequency: 50~60Hz *Power Reserve: 60 days *Clock Error: 1s/24h 25 Celsius *Build-in Battery: DC 1.2V/40MAH *Power Consumption: appro.1.5VAC *Contact Capacity: 25A 220V AC(Resistive Load) *Open/Close Time: 16 Times Day/Week Circle *Ambient Temperature: -25 Celsius to 60 Celsius *Size: 99X56X42mm/3.86" X2.17" X1.57"(L*W*H) Package Included: 1 x AC 220V 25A Din Rail Digital Programmable Electronic Timer Switch 1 x Manual

Review: Quite useful product - The product is quite good. Even instructions are also quite helpful (see the official video of company on youtube). Now I had faced the problem of E1 or E2 error codes. After watching their official video I got the hint and corrected. I had searched for the solution to E1,E2 error codes but could not find. So briefly mentioning what is procedure So here is the sequence. 1) take a thin (like a ball pen tip) object press the soft cushion reset button just below the red led on right edge. This will RESET every thing. now the timer will show 00:00 2) now first you need to enter the Day : Hours : Minute as described in videos/instruction manual. In case the keyboard is locked. press the BIG RED unlock button. 3) after setting the time now press P BUTTON . it will show 1 ON set the on time as you want (as explained above) press P BUTTON again repeat same for OFF time and repeat this process as many times as you want multiple ON OFF times. 4) NOW TO COME OUT OF PROGRAMMING MODE PRESS THE "CLOCK BUTTON ON RIGHT SIDE OF P BUTTON. (May pressing other button landed me into E1, E2 problem.) Now you had come to TIME DISPLAY mode. 5) Now for safety press BIG RED button to lock this keypad. 6)If anywhere you missed sequence / pressed wrong button and get into E1 E2 business, 'LIKE ME' repeat the process with that thin object (ball pen tip). BY THE WAY SEE only THE OFFICIAL VIDEO FOR ACCURATE INFO/less confusion. I am using this product for a sump motor. The sump motor had come with it's own starter box. Now this output of this timer is given as input to that starter box. secondly i had kept in another plastic box since I did not have the DIN rack ) purchased in Sep/25 added review on may/2 say after >7 months This product is working is working without an issue. I am using it to start another starter for my sump-submersible water motor/pump. This small unit I kept in a shaded area. Though I can program it in multiple ways at present it switches it on two times a day for 5 mins each. Whether we are at home or outside this does it's job well.
Review: Value for money. - Good performance. Skill is required to set the timer. Value for money. Quality is good.

## Features

- [Programmable Automation]: Easily set up to 16 On/Off programs with 7-day scheduling options, perfect for customizing operation for any day or combination of days.
- [Wide Applications]: Ideal for controlling streetlights, neon signs, water heaters, air conditioners, agricultural tools, and more. A versatile solution for homes, offices, and commercial setups.
- [Backup Battery for Reliability]: Built-in backup battery retains your settings during power outages, ensuring uninterrupted operation and convenience.
- [Flexible Operation Modes]: Switch effortlessly between AUTO (timed) and MANUAL (manual on/off) modes for full control at your fingertips.
- [Compact DIN Rail Design]: Space-saving and portable, it fits seamlessly into your setup while maintaining access to other outlets.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07NBBYN4N |
| Battery Type | DC 1.2V/40MAH |
| Best Sellers Rank | #127,737 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #77 in Wall Timer Switches |
| Brand | Blackt Electrotech |
| Brand Name | Blackt Electrotech |
| Color | White |
| Colour | White |
| Customer Reviews | 4.0 out of 5 stars 629 Reviews |
| Included Components | false |
| Item Dimensions D x W x H | 4.2D x 5.5W x 10H centimeters |
| Item Weight | 130 Grams |
| Item weight | 130 Grams |
| Manufacturer | Blackt Electrotech |
| Manufacturer Part Number | BT-21252 |
| Material | Acrylonitrile Butadiene Styrene |
| Material Type | Acrylonitrile Butadiene Styrene |
| Model Number | BT-21252 |
| Number of Items | 1 |
| Number of settings | 1 |
| Product dimensions | 4.2D x 5.5W x 10H centimeters |
| Screen Size | 99 Millimeters |
| UPC | 710918665375 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Blackt Electrotech
- **Colour:** White
- **Item weight:** 130 Grams
- **Material:** Acrylonitrile Butadiene Styrene
- **Product dimensions:** 4.2D x 5.5W x 10H centimeters

## Images

![BT41D4 Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase) - Image 1](https://m.media-amazon.com/images/I/614E06+DavL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quite useful product
*by P***D on 18 September 2025*

The product is quite good. Even instructions are also quite helpful (see the official video of company on youtube). Now I had faced the problem of E1 or E2 error codes. After watching their official video I got the hint and corrected. I had searched for the solution to E1,E2 error codes but could not find. So briefly mentioning what is procedure So here is the sequence. 1) take a thin (like a ball pen tip) object press the soft cushion reset button just below the red led on right edge. This will RESET every thing. now the timer will show 00:00 2) now first you need to enter the Day : Hours : Minute as described in videos/instruction manual. In case the keyboard is locked. press the BIG RED unlock button. 3) after setting the time now press P BUTTON . it will show 1 ON set the on time as you want (as explained above) press P BUTTON again repeat same for OFF time and repeat this process as many times as you want multiple ON OFF times. 4) NOW TO COME OUT OF PROGRAMMING MODE PRESS THE "CLOCK BUTTON ON RIGHT SIDE OF P BUTTON. (May pressing other button landed me into E1, E2 problem.) Now you had come to TIME DISPLAY mode. 5) Now for safety press BIG RED button to lock this keypad. 6)If anywhere you missed sequence / pressed wrong button and get into E1 E2 business, 'LIKE ME' repeat the process with that thin object (ball pen tip). BY THE WAY SEE only THE OFFICIAL VIDEO FOR ACCURATE INFO/less confusion. I am using this product for a sump motor. The sump motor had come with it's own starter box. Now this output of this timer is given as input to that starter box. secondly i had kept in another plastic box since I did not have the DIN rack ) purchased in Sep/25 added review on may/2 say after >7 months This product is working is working without an issue. I am using it to start another starter for my sump-submersible water motor/pump. This small unit I kept in a shaded area. Though I can program it in multiple ways at present it switches it on two times a day for 5 mins each. Whether we are at home or outside this does it's job well.

### ⭐⭐⭐⭐ Value for money.
*by K***L on 17 August 2025*

Good performance. Skill is required to set the timer. Value for money. Quality is good.

### ⭐⭐⭐⭐⭐ One of the best automation products!
*by N***R on 24 March 2021*

Works like a charm. Installed it few days ago, using it to control my staircase and gate lights. Let's see how good it performs in a long run. Strongly recommended automation product for all size homes and offices. Not recommended for very heavy usage, experiences and reliability may differ. Will update on the performance after few months of usage. I wish it came with a face cover to protect the soft input buttons.

## Frequently Bought Together

- Blackt Electrotech (BT41D4) : Digital Electronic Timer Switch 220V 25Amp DIN Rail Programmable
- Blackt Electrotech 230V 24x7 Energy Saving Socket Timer Digital Programmable Plastic (White)
- Blackt Electrotech BT31P2 White Water Proof 230Volt Auto Day/Night on and Off Photocell, Ldr Sensor Switch for Lighting (5 Pic 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://www.desertcart.co/products/424907755-bt41d4-digital-timer-switch-relay-din-rail-25-amps-programmable](https://www.desertcart.co/products/424907755-bt41d4-digital-timer-switch-relay-din-rail-25-amps-programmable)

---

*Product available on Desertcart Colombia*
*Store origin: CO*
*Last updated: 2026-09-02*