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Green PCB with relay, terminal blocks and display, 5 to 24 V DC current sensor board

Hetai Tech

Hetai Tech YYI-2 5-24V DC Current Sensor Relay Board

SKU CH-HHNF-BFEG5

Detects DC current from 0 to 10 A with 0.01 A accuracy and switches loads up to 5 A via relay

  • Detects DC current up to 10 A with 0.01 A accuracy
  • Relay switches loads up to 5 A on the same DC line
  • Seven programmable protection modes cover over-current, under-current and window limits
  • Error calibration and display-off option cut standby draw to about 20 mA
  • Operates from a single 5–24 V DC supply without extra regulators

DC Current Sensor Relay Board

The Hetai Tech YYI-2 module monitors DC current from 0 to 10 amps with 0.01 amp accuracy across a 5 to 24 volt supply range. It suits makers adding overcurrent protection or motor-blocking logic to low-voltage projects.

Detection limited to 10 amps

The onboard sensor cannot measure currents above 10 amps, and the relay output only controls DC lines up to 5 amps. Builders needing higher load switching or wider measurement range must look elsewhere.

Seven programmable protection modes

Modes P-11 through P-41 define how the relay reacts when current crosses the two user-set thresholds I1 and I2, including latch-on and window-comparator behaviours. Selecting the correct mode decides whether the board fits the application.

How it compares

Measured against everything we stock in Single-Board Computers & Dev Kits, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 96% of the 1,420 comparable items (median $44.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Which version of the YYI-2 board should I choose for a 12 V DC system?

The board operates from 5-24 V DC, so it works directly on a 12 V supply without any extra step-down or step-up converter.

What does the 10 A detection range mean when the relay is only rated for 5 A switching?

The sensor can measure up to 10 A, but the onboard relay will only switch loads up to 5 A; for higher currents you must use the relay to drive an external contactor.

How does the 0.01 A accuracy affect the over-current threshold I can set?

You can programme the trip points I1 and I2 in 10 mA steps, giving fine control over when the relay opens or closes.

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