# ACS72981KLRATR-150B3 Current Sensor Compact Carrier -150A to +150A, 3.3V

**Type:** Product page · **SKU:** POLOLU-5257 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/acs72981klratr-150b3-current-sensor-compact-carrier-150a-to-150a-33v.html ([markdown](https://core-electronics.com.au/acs72981klratr-150b3-current-sensor-compact-carrier-150a-to-150a-33v.html.md))

This board is a simple compact carrier of Allegro’s ACS72981KLRATR-150B3 Hall effect-based linear current sensor, which offers a low-resistance (~0.2 mO)...

## Pricing

- **Price:** $23.05 (inc GST) — $20.95 AUD, exc GST
- **Quantity discounts:** 10+ $20.12 (exc GST) · 25+ $19.49 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 28 and Aug 31.

## Description

The ACS72981KLRATR-150B3 Current Sensor Compact Carrier is designed for nominal 3.3 V operation and is intended for bidirectional input current from -150 A to +150 A. This version can be visually distinguished from other versions by the “3V3 B15” printed on the bottom side.

This compact carrier features the ACS72981KLRATR-150B3, which outputs a ratiometric analog voltage on VIOUT that is centered at VCC/2 and changes by 8.8 mV × (VCC/3.3 V) per amp of input current, with positive current increasing the output voltage and negative current decreasing the output voltage.

The sensor has five required connections: the input current (IP+ and IP-), logic power (VCC and GND), and the sensor output (VIOUT). The sensor requires a supply voltage of 3.0 V to 3.6 V to be connected across the VCC and GND pads, which are labeled on the bottom silkscreen.

This product is intended for use below 30 V. Working with higher voltages can be extremely dangerous and should only be attempted by qualified individuals with appropriate equipment and experience.

**Dimensions**

| Size: | 0.7" × 0.8" |
|---|---|
| Weight: | 1.4 g |

**General specifications**

| Typical operating voltage: | 3.3 V |
|---|---|
| Current sense: | 8.8 mV/A |
| Minimum logic voltage: | 3.0 V |
| Maximum logic voltage: | 3.6 V |
| Supply current: | 14 mA |
| Current range: | -150A to +150A (bidirectional 150A), 3.3V |
| Current sensor: | Allegro ACS72981KLRATR-150B3 |

**Identifying markings**

| PCB dev codes: | cs04a |
|---|---|
| Other PCB markings: | 0J14752 |
| Other PCB markings: | 3V3 B15 |

**Warning:** Exceeding temperature or current limits can cause permanent damage to the sensor. If you are measuring an average continuous current greater than 50 A, it is strongly recommended that you monitor the sensor’s temperature and look into additional cooling if necessary. This product can get hot enough to burn you long before the chip overheats. Take care when handling this product and other components connected to it.

**File downloads**

- **Dimension diagrams of the ACS72981xLR Current Sensor Carriers (400k pdf)**
- **3D model of the ACS72981xLR Current Sensor Compact Carriers (3MB step)**
- **Drill guide for the ACS72981xLR Current Sensor Compact Carriers (18k dxf)**

**Recommended links**

- **[ACS72981 datasheet](https://core-electronics.com.au/attachments/localcontent/acs72981-datasheet_398758c5124.pdf)**
- **[Allegro product page for the ACS72981 Hall-based Current Sensor](https://www.allegromicro.com/en/products/sense/current-sensor-ics/fifty-to-two-hundred-amp-integrated-conductor-sensor-ics/acs72981)**

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/P/O/POLOLU-5257-1.jpg)