GY-471 MAX471 Current Sensor Module — 3A Bidirectional High-Side
The MAX471 current sensor module measures bidirectional current flow on the high side of a load (between supply and load, not between load and ground), outputting a voltage proportional to current at 0.37V/A. Measuring on the high side preserves a common ground reference between the MCU and the load, avoiding the ground shift problems of low-side sensing. The 3A maximum rating covers small motors, LED arrays, and battery charger monitoring at 5V–36V supply voltage.
- High-side current sensing — no ground reference shift
- Bidirectional — measures current in both directions (charge and discharge)
- 3A maximum rating
- 0.37V/A output sensitivity
- 5V–36V power rail sensing range
- Analogue output — reads on any Arduino ADC pin
| Specification | Value |
|---|---|
| Chip | MAX471 |
| Maximum current | 3A |
| Sensitivity | 0.37V/A |
| Sensing method | High-side, bidirectional |
| Supply voltage range | 5V – 36V (power rail being measured) |
| Output | Analogue voltage |
Best for
Battery charge/discharge monitoring, solar panel current logging, small motor current limiting, LED driver current monitoring, 12V automotive circuit measurement, and any bidirectional current sensing application under 3A where high-side measurement is required.
Why Kunkune
Shipped from UK stock. 60-day returns, no minimum order. Fast Royal Mail delivery.
Buying in bulk? For orders of 10+ units, contact us for trade pricing.
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