# ACS37220LEZATR-100B5 Current Sensor Large Carrier -100A to +100A, 5V

**Type:** Product page · **SKU:** POLOLU-5297 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/acs37220lezatr-100b5-current-sensor-large-carrier-100a-to-100a-5v.html ([markdown](https://core-electronics.com.au/acs37220lezatr-100b5-current-sensor-large-carrier-100a-to-100a-5v.html.md))

This is the large version of a simple carrier for Allegro’s ACS37220LEZATR-100B5 Hall effect-based, electrically isolated current sensor, which offers an...

## Pricing

- **Price:** $18.40 (inc GST) — $16.73 AUD, exc GST
- **Quantity discounts:** 10+ $16.05 (exc GST) · 25+ $15.55 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 20 and Aug 24.

## Description

The ACS37220 Current Sensor Large Carrier features the ACS37220LEZATR-100B5, which is intended for nominal 5 V operation and is designed for bidirectional input current from -100 A to +100 A. This version can be visually distinguished from the other versions by the “5V B10” printed on the bottom side.

This large carrier is suitable for applications requiring accurate current sensing and features a compact design with a size of 1.4" × 1.2". It operates with a typical supply voltage of 5 V and has a sensitivity of 20 mV/A. The sensor requires a supply voltage of 4.5 V to 5.5 V to be connected across the VDD and GND pads, which are labeled on the bottom silkscreen. The sensor outputs an analog voltage on VOUT that is centered at 2.5 V and changes by 20 mV 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 (VDD and GND), and the sensor output (VOUT). The output is not ratiometric, so the zero point and sensitivity are independent of the actual supply voltage.

The optional VOC pin can be used to set the overcurrent fault threshold. An on-board 205 kO resistor between VOC and GND sets the default overcurrent fault threshold to approximately 200% of the nominal sensing range, and an external resistor can be added in parallel between VOC and GND to lower this threshold to between 50% and 200%. The following equation gives the value of this parallel resistor, ROC, in kO as a function of overcurrent fault threshold percentage P:

ROC = (205 kO · P) / (205% – P)

For example, to set the overcurrent fault limit to 50% of the nominal sensing range, a 66 kO external resistor can be added between VOC and GND.

The FAULT, VOUT, VDD, GND, and VOC pins work with [0.1"-pitch header pins](https://core-electronics.com.au/0-100-2-54-mm-breakaway-male-header-1x40-pin-straight.html) and are compatible with standard [solderless breadboards](https://core-electronics.com.au/prototyping/breadboards.html).

**Warning:** 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: | 1.4" × 1.2" |
|---|---|
| Weight: | 4.1 g |

**General specifications**

| Typical operating voltage: | 5 V |
|---|---|
| Current sense: | 20 mV/A |
| Minimum logic voltage: | 4.5 V |
| Maximum logic voltage: | 5.5 V |
| Supply current: | 16 mA |
| Current range: | -100A to +100A (bidirectional 100A), 5V |
| Current sensor: | Allegro ACS37220LEZATR-100B5 |

**Identifying markings**

| PCB dev codes: | cs06b |
|---|---|
| Other PCB markings: | 0J14835 |
| Other PCB markings: | 5V B10 |

**Notes:**

 1 Typical.**File downloads**

- **Dimension diagrams of the ACS37220 Current Sensor Carriers (403k pdf)**
- **3D model of the ACS37220 Current Sensor Large Carriers (3MB step)**
- **Drill guide for the ACS37220 Current Sensor Large Carriers (20k dxf)**
    
    This DXF drawing shows the locations of all of the board’s holes.

**Recommended links**

- **[ACS37220 datasheet](https://core-electronics.com.au/attachments/localcontent/acs37220-datasheet_28252ab4c67.pdf)**
- **[Allegro product page for the ACS37220 Hall-based Current Sensor](https://www.allegromicro.com/en/products/sense/current-sensor-ics/fifty-to-two-hundred-amp-integrated-conductor-sensor-ics/acs37220)**
    
    Allegro product page for the ACS37220, where you can find additional application notes and other resources.

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/P/O/POLOLU-5297-1.jpg)