Current Sensor Module for Arduino & Raspberry Pi | ACS712SKU 2026

Sensors & Modules

Current Sensor Module for Arduino & Raspberry Pi | ACS712

₹119

01 — About

What it does

The Current Sensor Module for Arduino & Raspberry Pi | ACS712 uses the Hall effect to measure AC or DC current non-invasively. It provides an analog voltage output proportional to the measured current with 2.1kV isolation between sensor and measurement circuit.

Key features

  • Hall effect-based non-invasive current sensing
  • Measures AC and DC current with bidirectional capability
  • 2.1kV isolation between primary and secondary circuits
  • Analog voltage output proportional to current
  • Low internal resistance (1.2mΩ) for minimal power loss
  • Available in multiple ranges (5A, 20A, 30A variants)
  • 3.3V-5V operation with ratiometric output

Good to know

  • Verify which variant you have (5A/20A/30A) – sensitivity differs
  • 5A variant has highest resolution but lower maximum current
  • Output is VCC/2 at zero current – measure this for calibration
  • For AC measurement, sample rapidly and calculate RMS in software
  • Place sensor in series with one conductor (not both in clamp-on style)

02 — Datasheet

Specifications

10
Model
ACS712
Sensor Type
Hall effect
Current Ranges
5A / 20A / 30A
Output
Analog voltage (ratiometric)
Sensitivity
185mV/A (5A), 100mV/A (20A), 66mV/A (30A)
Operating Voltage
5V (ratiometric)
Isolation
2.1kV
Internal Resistance
1.2mΩ
Bandwidth
80kHz
Dimensions
31mm x 13mm