We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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.

Highlights

  • 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

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.

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.