---
product_id: 111162674
title: "Blackt Electrotech BT41D4 : Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase)"
brand: "blackt electrotech"
price: "€ 19.52"
currency: EUR
in_stock: true
reviews_count: 8
category: "Blackt Electrotech"
url: https://www.desertcart.nl/products/111162674-blackt-electrotech-bt41d4-digital-timer-switch-relay-din-rail-25
store_origin: NL
region: Netherlands
---

# 25A heavy-duty relay capacity Backup battery for power outage retention 30 programmable ON/OFF cycles Blackt Electrotech BT41D4 : Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase)

**Brand:** blackt electrotech
**Price:** € 19.52
**Availability:** ✅ In Stock

## Summary

> ⏰ Power your schedule, never miss a beat!

## Quick Answers

- **What is this?** Blackt Electrotech BT41D4 : Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase) by blackt electrotech
- **How much does it cost?** € 19.52 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/111162674-blackt-electrotech-bt41d4-digital-timer-switch-relay-din-rail-25)

## 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

- • **Dual Mode Flexibility:** Seamlessly switch between AUTO timed control and MANUAL override for on-demand operation.
- • **Robust 25 Amp Relay Power:** Handles high-load single-phase devices like pumps, ACs, and industrial equipment with ease.
- • **Space-Smart DIN Rail Design:** Compact, easy-to-install form factor fits perfectly in control panels without clutter.
- • **Precision Scheduling Mastery:** Customize up to 30 daily/weekly ON/OFF programs for ultimate control and energy efficiency.
- • **Uninterrupted Settings Backup:** Built-in battery ensures your timer settings stay intact even during power failures.

## Overview

The Blackt Electrotech BT41D4 is a compact, DIN rail-mounted digital timer switch relay designed for precise, programmable control of single-phase electrical devices up to 25 amps. Featuring up to 30 customizable ON/OFF programs with 7-day scheduling, a backup battery to retain settings during outages, and flexible AUTO/MANUAL modes, it’s ideal for automating lighting, HVAC, pumps, and industrial equipment in homes, offices, and commercial environments.

## Description

Product Description Precision Digital Timer for Automatic Control The Blackt Electrotech BT41D4 is a high-performance digital timer switch relay designed for precise control of electrical devices. With its fully programmable automatic ON/OFF function, it ensures devices operate exactly when needed, improving convenience, efficiency, and energy savings. Perfect for lighting systems, pumps, motors, and other single-phase appliances, this timer is a reliable solution for home, office, and industrial automation. DIN Rail Mounted for Easy Installation This timer switch features a DIN rail mounting design, allowing for quick and secure installation in distribution boxes, control panels, and other setups. The compact form factor ensures it takes up minimal space while remaining easily accessible for programming and maintenance. Fully Programmable for Flexible Scheduling The BT41D4 offers daily and weekly programmable settings, enabling users to schedule multiple ON/OFF cycles according to specific needs. This flexibility makes it perfect for applications like timed lighting, water pumps, factory machinery, and HVAC systems.

Review: Good product... Match the requirements well - Working properly and very useful
Review: A good Digital Timer Switch. - A good Digital Timer Switch Relay. But time with main clock. It goes slow. Has to readjusted after some months.

## Features

- 🕒 Programmable Automation: Easily set up to 30 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 |
| Best Sellers Rank | #10,982 in Home Improvement ( See Top 100 in Home Improvement ) #29 in Wall Timer Switches |
| Brand | Blackt Electrotech |
| Colour | White |
| Country of Origin | India |
| Customer Reviews | 4.1 out of 5 stars 627 Reviews |
| Display Size | 99 Millimetres |
| Enclosure Material | Polycarbonate |
| Importer Contact Information | Blackt Electrotech |
| Included Components | false |
| Item Dimensions D x W x H | 10D x 6W x 8H Centimeters |
| Item Type Name | timer |
| Item Weight | 130 Grams |
| Manufacturer | Blackt Electrotech, www.blackt.in |
| Manufacturer Contact Information | www.blackt.in |
| Manufacturer Part Number | BT-21252 |
| Material | Polycarbonate |
| Model number | BT-21252 |
| Number of settings | 16 |
| Packer Contact Information | Blackt Electrotech |
| Product Dimensions | 10D x 6W x 8H Centimeters |
| UPC | 710918665375 |
| Unit Count | 1.00 Count |

## Product Details

- **Brand:** Blackt Electrotech
- **Colour:** White
- **Item Weight:** 130 Grams
- **Material:** Polycarbonate
- **Product Dimensions:** 10D x 6W x 8H Centimeters

## Images

![Blackt Electrotech 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)
![Blackt Electrotech BT41D4 : Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase) - Image 2](https://m.media-amazon.com/images/I/71v5NUCrf4L.jpg)
![Blackt Electrotech BT41D4 : Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase) - Image 3](https://m.media-amazon.com/images/I/81AQttXbo9L.jpg)
![Blackt Electrotech BT41D4 : Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase) - Image 4](https://m.media-amazon.com/images/I/71jD6bsTBtL.jpg)
![Blackt Electrotech BT41D4 : Digital Timer Switch Relay DIN Rail, 25 Amps Programmable Automatic On/Off (Single-Phase) - Image 5](https://m.media-amazon.com/images/I/71vlPgMo-wL.jpg)

## Questions & Answers

**Q: How many programmes per day can set?  howmany this day programmae will work.? what is the warrnaty condition?**
A: 15 time

**Q: Does this reset with power cut? Or it has a rechargeable battery?**
A: It has a rechargeable battery and we need not reset it after power cut

**Q: I need to use this switch use as my main swicth. I need to off/cut my grid power at night and on at morning. Is that will work?**
A: It will in case your load on the mains is less than the rating of the relay in this timer, then it will work. But in case the load is more then you will have to use a contactor in between this timer and the mains

**Q: How to change the battery when dead ?**
A: Working fine

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product... Match the requirements well
*by N***L on 9 January 2026*

Working properly and very useful

### ⭐⭐⭐⭐ A good Digital Timer Switch.
*by C***S on 19 November 2025*

A good Digital Timer Switch Relay. But time with main clock. It goes slow. Has to readjusted after some months.

### ⭐⭐⭐⭐⭐ Excellent product
*by V***I on 13 January 2026*

Excellent performance

## Frequently Bought Together

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-03-16*