> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# KR Sense Current and Voltage Sensor - 45A

**Type:** Product page · **SKU:** SEN-16407 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/kr-sense-current-and-voltage-sensor-45a.html ([markdown](https://core-electronics.com.au/kr-sense-current-and-voltage-sensor-45a.html.md))

The KR Sense 45A is a small voltage and current sense breakout board. DC current is determined by measuring a voltage drop across a parallel shunt resistor, then...

## Pricing

- **Price:** $44.20 (inc GST) — $40.18 AUD, exc GST
- **Quantity discounts:** 5+ $38.97 (exc GST) · 25+ $38.17 (exc GST) · 100+ $36.56 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## How to buy

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- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

The KR Sense 45A is a small voltage and current sense breakout board. DC current is determined by measuring a voltage drop across a parallel shunt resistor, then converted to a final analog voltage output by the INA-169. Voltage sense is accomplished by scaling to 3.3V ADC range by a precision resistor divider. This version of the sensor features a maximum voltage tolerance of 51.8V at 44.7A, to be exact.

Please be aware that KR Sense boards are supplied without leads or connectors. The pad sizes are large enough to accommodate 12 gauge heavy duty leads but care must be exercised when soldering. Smaller gauge leads are considerably easier to solder without creating shorts.

This product is compatible with the Attopilot 45A Voltage and Current Sensor Breakout.

**Features**

- Input resistor divider scaled for 13.6V Input voltage (recommended) for 3.3V output
- 51.8V Max
- 44.7A Max
- Very low zero current offset
- Analog current output scaled for 3.3V ADC
- Self Powered

**Documents**

- [Input Voltage to Voltage on Vout](https://core-electronics.com.au/attachments/localcontent/Voltage_to_Voltage_45a_183432383de.png)
- [Input Current to Voltage on Iout](https://core-electronics.com.au/attachments/localcontent/Current_to_Voltage_45a_152337d5afd.png)
- [STEP Model](https://cdn.sparkfun.com/assets/d/f/e/6/f/24KXAUWo.part)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/1/6/16407-kr_sense_45a_current_and_voltage_sensor-01.jpg)