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Reference: RELAYHI2

Brand: Yoctopuce

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Review(s): 4
USB interface driving a tiny electromagnetic relay capable of switching directly mains powered appliances, up to 1250W. You can add Ethernet, Wireless or GSM connectivity to this device.
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Yocto-PowerRelay-V2
  • Yocto-PowerRelay-V2
  • Yocto-PowerRelay-V2
  • Yocto-PowerRelay-V2
  • Yocto-PowerRelay-V2

Yocto-PowerRelay-V2

RELAYHI2
Yoctopuce
Rating 

USB interface driving a tiny electromagnetic relay capable of switching directly mains powered appliances, up to 1250W. You can add Ethernet, Wireless or GSM connectivity to this device.

€28.35
Tax excluded
3-5 days
Quantity
In stock

Secure Payment Pay by credit card (Visa, Mastercard) via PayPlug or by bank transfer.
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B2B specialist support Technical support available 5/7. We use these products in our own monitoring projects.
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Description

The Yocto-PowerRelay-V2 is a USB relay: it contains a USB-driven SPDT relay switch: you can drive by software the relay input to one of the two outputs. To make it easier to test your project, two leds positioned on each side of the connector show the output currently active. 

This device only includes a single relay, but it can drive higher loads than the Yocto-Relay device. The relay and the connector can stand 250 VAC and a current of 5A. When put in an adequate enclosure, the Yocto-PowerRelay-V2 can be used to switch directly appliances connected to the mains. Be aware that using a relay to drive inductive loads (motors, transformers) may lead to accelerated aging of the relay. Please refer to the documentation for hints on reducing this type of problems.

This device can beconnected directly to an Ethernet network using a YoctoHub-Ethernet, to a WiFi network using a YoctoHub-Wireless-g, it can even be connected to a GSM network thanks to the YoctoHub-GSM.

USB cables and enclosure to be ordered separately.

Product Details
RELAYHI2

Data sheet

Width
20mm
Length
45mm
Weight
12g
USB connector
micro-B
Channels
1
USB bus insulation
3kV
Max working voltage
250V AC
Max withholding voltage
1.5 kV
Max switching power
1250W
Max switching current
5A
Normal operating temperature
5...40°C
Extended operating temperature
-30...85°C
Supported Operating Systems
Windows (PC + IoT), Linux (Intel + ARM), macOS, Android
Drivers
no driver needed
RoHS
RoHS III (2011/65/UE+2015/863)
Suggested enclosure
YoctoBox-Short-Thick-Black
IEC protection class
Classe II
API / SDK / Librairie
C++ Obj-C C# VB.NET UWP Delphi Python Java Android LabVIEW
API / SDK / Librairie (seul.TCP)
Javascript Node.js PHP
Reviews
Grade 
Johan Edwards (Turck)
01/25/2026

Clear documentation

Documentation is thorough and up to date. Our developers integrated the module within a day. Delivery took slightly longer than expected.

Grade 
Alex
07/20/2025

Good build quality

Module behaves according to specifications, including edge cases we tested.

Grade 
Quality Engineer, Festo
06/02/2025

Reliability as expected

Used to control our test equipment. Reliability has been consistent through several thousand cycles.

Grade 
Bertrand B.
04/05/2025

Satisfait, nous en avons recommandé

Après 15 mois d'utilisation, nous avons passé une nouvelle commande pour équiper un second site.

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