Ordered on weekdays before 14:00 = shipped the same day and delivered the next day in 98% of cases. Free returns 30-day reflection period 1-year warranty Ordered on weekdays before 14:00 = shipped the same day and delivered the next day in 98% of cases. Free returns 30-day reflection period 1-year warranty

USB relay module

High Quality 1 Channel 5V USB Relay Module – 3

High Quality 1 Channel 5V USB Relay Module – 4

High Quality 1 Channel 5V USB Relay Module – 5

High Quality 1 Channel 5V USB Relay Module – 6

High Quality 1 Channel 5V USB Relay Module – 1

High Quality 1 Channel 5V USB Relay Module

Name: High Quality 1 Channel 5V USB Relay Module
Brand: OTRONIC
SKU: OT3550
Price: 8.45 EUR
Availability: InStock
Rating: 5 (4 reviews)

1-channel 5V USB relay module for home automation, robotics and Windows control from your PC.

5,0/5 (4 reviews) See all reviews

SKU: OT3550 Article number: NA341 EAN: 8720828223307 Location: E07.01

€ 8,45 Incl. VAT (€ 6,98 Excl. VAT)

In stock (9)

30-day reflection period
1-year warranty
Ordered on weekdays before 2:00 PM, shipped today
Free returns

Alternative USB PC 2-channel 5V relay € 7,00 View this alternative

High Quality 1 Channel 5V USB Relay Module

Module for use of HID technology: plug-and-play, user-friendly and simple

Suitable for:

1. Home automation
2. Robotics control
3. Operate doors and windows via, among others, Windows
4. Controller power supply:

Contact type: NC/COM/NO
Input voltage: DC 5V
Input current: >>300mA
The maximum you can control: AC 250V 10A, DC 30V 10A, AC load and maximum DC load
Supports WIN7, XP 32-bit, 64-bit systems

Suitable to control in Windows command line or via custom software

To control this module from your PC, software is required which you can download below:

OTRONIC USB RELAY SOFTWARE

USB relay module
Plug-and-play
DC 5V input
HID technology

Why choose this product?

Plug-and-play – Ready to use via HID technology.
Easy PC control – Control via Windows command line or software.
Suitable for home automation – For home automation, robotics and door control.
Broad system support – Works with Windows 7 and XP.
Relay contacts – NC/COM/NO contact type for switching.

Specifications

Input voltage	DC 5V
Compatible with	Windows 7
Power	AC 250V 10A
Input current	>>300mA
Contact type	NC/COM/NO

Reviews

★★★★★ 5,0/5 4 reviews

★★★★★Richard Broekhuis10-11-2025

A fine little device with the necessary software for control.
★★★★★Robert17-08-2025

As expected
★★★★★bert Minderman23-05-2025

Works fine.
★★★★★Willem-Bever03-03-2025

Everything fine.