HELISHUN HLS-4078-DC5V Relay 5V 1A 8-Pin Yellow
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Prices updated: 13 Oct 2026
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About this product
An 8-pin HELISHUN HLS-4078 relay with a 5V DC coil, listed with a 1A rating and a yellow housing. It is used to switch small loads and control circuits from a low-voltage DC signal in electronics and DIY projects. Check the contact ratings printed on the relay before connecting a load.
Specifications
- Coil voltage
- 5 VDC
- Rated current (as listed)
- 1A
- Number of pins
- 8
- Housing color
- Yellow
Frequently asked questions
Do I need a flyback diode with this relay?
Yes, when the coil is driven from a transistor or microcontroller pin. A flyback diode across the coil protects the driver from the voltage spike when the coil is switched off.
Can I drive the coil directly from a 5V Arduino pin?
The coil is rated 5 VDC, so it can be energised from a 5 V supply. An Arduino pin may not supply enough current for the coil, so a transistor driver is usually recommended.
