> For the complete documentation index, see [llms.txt](https://docs.bituo-technik.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bituo-technik.com/product-document/brcs-series/brcs03c-iec.md).

# 🟢BRCS03C - IEC

{% hint style="info" %}
 **Applies to:** BRCS03C AC/DC Residual Current Sensor (IEC version, Type A 30mA and DC 6mA (IEC 60947-2-(M)+IEC 62955) / DC 6mA (IEC 62955)) | **Last Updated:** 2026-09-25
{% endhint %}

### 1. Introduction

<div align="left"><figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FT4oJRipNGMhQxZ1JYGNq%2Fimage.png?alt=media&amp;token=e9725707-a579-496f-830e-1fe8960cfd84" alt="" width="150"><figcaption></figcaption></figure></div>

The BRCS03C is an AC/DC residual current sensor with two separate fault signal outputs – one Pin with DC fault signal output and the other Pin with AC & DC fault signal output. It can be used for built-in RDC-MD (Residual Direct Current Monitoring Device, DC 6mA, IEC 62955) or RDC-PD (Type A 30mA and DC 6mA, Residual Direct Current Protection Device, IEC61008-1 + IEC 62955) at Mode-3 AC chargers. Additionally, it can be used in IC-CPD (In-Cable Control- and Protection Device).

* Accurate measurement and optimization against nuisance tripping
* Cost-effective solution of residual current detection for Mode-2/3 EVSE
* Fast response time facilitating a broad selection of switching devices
* Two fault signal pins for solely DC 6mA and Type-A 30mA +DC 6mA alarming

***

### 2. Technical Data

<table><thead><tr><th width="75">#</th><th width="415">Technical Specification</th><th>Value</th></tr></thead><tbody><tr><td>101</td><td>Rated operating voltage in monitoring circuit</td><td>230/400VAC</td></tr><tr><td>102</td><td>Rated current in monitoring circuit</td><td>≤ 32A</td></tr><tr><td>103</td><td>Poles in monitoring circuit</td><td>1P+N / 3P+N</td></tr><tr><td>104</td><td>Frequency in monitoring circuit</td><td>50Hz</td></tr><tr><td>105</td><td>Rated impulse withstand voltage in monitoring circuit</td><td>6kV</td></tr><tr><td>106</td><td>Over-voltage category in monitoring circuit</td><td>III</td></tr><tr><td>201</td><td>Rated operating voltage in control circuit, <span class="math">V_{cc}</span></td><td>5VDC ± 3%</td></tr><tr><td>202</td><td>Power consumption</td><td>&#x3C; 500mW</td></tr><tr><td>203</td><td>Pin 1 – N.C.</td><td>Not connected</td></tr><tr><td>204</td><td>Pin 2 – Test signal</td><td>Digital input</td></tr><tr><td>205</td><td>Pin 3 – DC fault signal</td><td>Digital output</td></tr><tr><td>206</td><td>Pin 4 – AC &#x26; DC fault signal</td><td>Digital output</td></tr><tr><td>207</td><td>Pin 5 – GND</td><td>GND</td></tr><tr><td>208</td><td>Pin 6 – Vcc for 5V</td><td>+5VDC</td></tr><tr><td>301</td><td>Rated DC residual operating current <span class="math">I_{\Delta dc}</span></td><td>6mA</td></tr><tr><td>302</td><td>Rated DC residual non-operating current <span class="math">I_{\Delta ndc}</span></td><td>3mA</td></tr><tr><td>303</td><td>Rated AC residual operating current <span class="math">I_{\Delta n}</span></td><td>30mA</td></tr><tr><td>304</td><td>Rated AC residual non-operating current <span class="math">I_{\Delta nc}</span></td><td>15mA</td></tr><tr><td>305</td><td>Electrical endurance</td><td>20,000</td></tr><tr><td>306</td><td>Rated operating temperature</td><td>-40~85 ℃</td></tr><tr><td>307</td><td>Pollution degree</td><td>2</td></tr></tbody></table>

***

### 3. Residual Current Detection Characteristics

#### Operating Current

<table><thead><tr><th width="81">#</th><th>Operating Current</th><th>PIN 3 (DC)</th><th>PIN 4 (AC &#x26; DC)</th></tr></thead><tbody><tr><td>401</td><td>Smooth DC</td><td>4.0~6.0 mA</td><td>4.0~6.0 mA</td></tr><tr><td>402</td><td>DC rectified from 2 phases</td><td>4.0~7.0 mA</td><td>4.0~7.0 mA</td></tr><tr><td>403</td><td>DC rectified from 3 phases</td><td>4.0~6.2 mA</td><td>4.0~6.2 mA</td></tr><tr><td>404</td><td>Sinewave AC</td><td>-</td><td>22.0~28.0 mA</td></tr><tr><td>405</td><td>A0 pulsating DC</td><td>-</td><td>10.5~42.0 mA</td></tr><tr><td>406</td><td>A90 pulsating DC</td><td>-</td><td>7.5~42.0 mA</td></tr><tr><td>407</td><td>A135 pulsating DC</td><td>-</td><td>3.3~42.0 mA</td></tr></tbody></table>

#### Operating Time

<table><thead><tr><th width="82">#</th><th width="225">Response time</th><th>PIN 3 (DC)</th><th>PIN 4 (AC &#x26; DC)</th></tr></thead><tbody><tr><td>501</td><td>Smooth DC 6mA</td><td>≤ 500 ms</td><td>≤ 500 ms</td></tr><tr><td>502</td><td>Smooth DC 60mA</td><td>≤ 200 ms</td><td>≤ 200 ms</td></tr><tr><td>503</td><td>Smooth DC 200mA</td><td>≤ 70 ms</td><td>≤ 70 ms</td></tr><tr><td>504</td><td>Smooth DC 300mA</td><td>-</td><td>≤ 20 ms</td></tr><tr><td>505</td><td>DC rectified from 2 phases 60mA</td><td>≤ 200 ms</td><td>≤ 200 ms</td></tr><tr><td>506</td><td>DC rectified from 2 phases 200mA</td><td>≤ 70 ms</td><td>≤ 70 ms</td></tr><tr><td>507</td><td>DC rectified from 2 phases 300mA</td><td>-</td><td>≤ 20 ms</td></tr><tr><td>508</td><td>DC rectified from 3 phases 60mA</td><td>≤ 200 ms</td><td>≤ 200 ms</td></tr><tr><td>509</td><td>DC rectified from 3 phases 200mA</td><td>≤ 70 ms</td><td>≤ 70 ms</td></tr><tr><td>510</td><td>DC rectified from 3 phases 300mA</td><td>-</td><td>≤ 20 ms</td></tr><tr><td>511</td><td>AC 30mA</td><td>> 10000 ms</td><td>≤ 80 ms</td></tr><tr><td>512</td><td>AC 60mA</td><td>> 300 ms</td><td>≤ 60 ms</td></tr><tr><td>513</td><td>AC 150mA</td><td>> 80 ms</td><td>≤ 20 ms</td></tr><tr><td>514</td><td>AC 5A</td><td>> 80 ms</td><td>≤ 20 ms</td></tr></tbody></table>

***

### 4. Application Notes

#### Typical integration diagram&#x20;

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FutZxiQGQlb5TPcRHszFG%2Fimage.png?alt=media&amp;token=a96b9e9d-1b50-48bf-a4c0-a7245dcd64f2" alt=""><figcaption></figcaption></figure>

Additional information

* **Ferrite beads** - such as `BLM21PG331SN1D` - are suggested to replace the L1 at some existing charging controller models. C3 might be added in case of limit 5V DC power supply. Please ensure the DC power supply to the 5V version sensor is within the range of **5VDC ± 3%**, so as to ensure the proper function of the sensor.
* **NPN transistors** are used internally at the Pin 3 (DC fault signal) and Pin 4 (AC & DC fault signal) of the 5V version sensor, and the direct connection of Pin 3/4 to switching devices such as relays or contactors - is **NOT allowed**. $$V\_{ce}$$ and $$I\_c$$ of the NPN transistor inside the 5V version sensor are maximally **40V** and **50mA**.

#### Self-test time chart

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2Fkm8oeu5qqgA2P6ImycgH%2Fimage.png?alt=media&amp;token=0c9f99fd-dfb0-446c-8be7-2b8c4801f440" alt=""><figcaption></figcaption></figure>

* A self-test **excluding** offset calibration is activated if Pin 2 - Test is connected to GND for a period of **40ms to 130ms**.
* A self-test **including** offset calibration is activated if Pin 2 - Test is connected to GND for a period of **150ms to 1000ms**. *(Note:* $$t\_1$$ *is the response time for internally generated test current.)*

#### Offset calibration time chart

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FCEL6ljHv5a7EFgIWG6ID%2Fimage.png?alt=media&amp;token=a8a6c792-abaf-4b71-a07c-d60602de07b9" alt=""><figcaption></figcaption></figure>

An offset calibration is activated if Pin 2 - Test is connected to GND for a period of **2s to 3s**. An offset calibration can be activated at regular intervals (such as start-up) or after the occur of certain critical events (such as short circuit).

> ⚠️ **Attention**: During the offset calibration, **NO leakage current or any other current may flow through the device** and the relays/contactors must be open. Also, the power supply voltage at Pin 6 Vcc must be stay at **5VDC ± 3%**.

#### Possible Output States

<table><thead><tr><th width="310">Status</th><th>PIN 3 Output (DC Trip)</th><th>PIN 4 Output (AC &#x26; DC Trip)</th></tr></thead><tbody><tr><td><strong>Normal condition</strong></td><td>GND</td><td>GND</td></tr><tr><td><span class="math">I_{\Delta} \ge 6</span> <strong>mA DC</strong></td><td>High impedance</td><td>High impedance</td></tr><tr><td><span class="math">I_{\Delta} \ge 30</span> <strong>mA AC</strong></td><td>GND <em>1)</em></td><td>High impedance</td></tr><tr><td><span class="math">I_{\Delta} \ge 30</span> <strong>mA AC &#x26;</strong> <span class="math">I_{\Delta} \ge 6</span> <strong>mA DC</strong></td><td>High impedance</td><td>High impedance</td></tr></tbody></table>

> *1) A change from GND to High impedance is allowed, as long as such a change is compliant with IEC 62955.*

***

### 5. Mechanical outline

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FA5g6AYFkiPkljv5E4yHl%2Fimage.png?alt=media&amp;token=80dae139-70c6-4139-9d9c-5c760ba34653" alt=""><figcaption></figcaption></figure>

**BRCS03C-05-L1 Pin Definition: 1**: NC | **2**: Test | **3**: DC fault | **4**: AC\&DC fault | **5**: GND | **6**: 5V DC

***

### 6. Ordering information

<table><thead><tr><th width="65">#</th><th width="197">Order Number</th><th>Description</th></tr></thead><tbody><tr><td>1</td><td><strong>BRCS03C-05-L1</strong></td><td><strong>BRCS03C Residual Current Sensor</strong><br>• 5V DC Interface, PCB-mounting (Copper jumper)<br>• Type A 30 mA+DC6mA / DC6mA, 32A, 1P+N / 3P+N<br>• 6 Pin, Pitch=1.9mm</td></tr></tbody></table>

***

### 7. Additional Notes

> 🛑 **ESD Warning**: The sensor is susceptible to be damaged from an ESD event and the personnel should be grounded when handling it.

* Do **NOT** allow strong static electricity near the sensor, because static electricity can cause damage to the ICs inside the sensor. Take static electricity precautions when handling.
* Do **NOT** exceed 260°C for 10 seconds when soldering the sensors of PCB-mounting versions. This is the maximum heat resistance grade of these sensors.
* Do **NOT** solder the sensors with the central isolation cross installed. The central isolation cross can be installed after soldering the sensors.
* Do **NOT** drop the sensor or apply any other mechanical stress to the sensor, as such stresses may change performance characteristics.
* Please place the sensor with an appropriate distance from components that can generate high magnetic fields, such as relays or contactors, to ensure accurate residual current detection.