> 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/brcs01-iec.md).

# BRCS01 - IEC

## BRCS01/01X - IEC

{% hint style="info" %}
**Applies to:** BRCS01/01X AC/DC Residual Current Sensor (IEC 62955) | **Last Updated:** 2026-09-28
{% 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%2FC97zXgqNZ6nUwXZa9zo1%2Fimage.png?alt=media&amp;token=f663ad3f-785d-43dc-b68e-31e4215340d7" alt="" width="375"><figcaption></figcaption></figure></div>

The BRCS01/01X is a residual current sensor for charging equipment of electric vehicles. It supports residual current detection of either solely DC 6mA (IEC 62955) or combined Type-A 30mA and DC 6mA (IEC 62752).

* Simplified 4 pin interface of Vcc, GND, Test and Trip
* Residual current detection either solely DC 6mA or combined Type A 30mA and DC 6mA
* Fast residual current detection facilitates broad selection of switching relays and contactors
* Cost-effective solution of residual current detection for charging system of Electric Vehicles
* Available in both **Flexible** and **PCB-mount** variants

***

### 2. Technical Data

<table><thead><tr><th width="72">#</th><th width="378">Technical Specification</th><th width="158">BRCS01-ADC-* / BRCS01X-ADC-*</th><th>BRCS01-DC6-* / BRCS01X-DC6-*</th></tr></thead><tbody><tr><td>101</td><td>Rated operating voltage in monitoring circuit</td><td>230/400VAC</td><td>230/400VAC</td></tr><tr><td>102</td><td>Rated current in monitoring circuit</td><td>≤ 32A</td><td>≤ 32A</td></tr><tr><td>103</td><td>Poles in monitoring circuit</td><td>1P+N / 3P+N</td><td>1P+N / 3P+N</td></tr><tr><td>104</td><td>Frequency in monitoring circuit</td><td>50Hz</td><td>50Hz</td></tr><tr><td>105</td><td>Rated impulse withstand voltage in monitoring circuit</td><td>4kV</td><td>4kV</td></tr><tr><td>106</td><td>Over-voltage category in monitoring circuit</td><td>III</td><td>III</td></tr><tr><td>201</td><td>Rated operating voltage in control circuit</td><td>5VDC ± 3%</td><td>5VDC ± 3%</td></tr><tr><td>202</td><td>Power consumption</td><td>&#x3C; 500mW</td><td>&#x3C; 500mW</td></tr><tr><td>203</td><td>Pin 1 - Vcc</td><td>+5VDC</td><td>+5VDC</td></tr><tr><td>204</td><td>Pin 2 - GND</td><td>GND</td><td>GND</td></tr><tr><td>205</td><td>Pin 3 - Test signal input</td><td>Test <sup>1)</sup></td><td>Test <sup>1)</sup></td></tr><tr><td>206</td><td>Pin 4 - Fault signal output</td><td>Trip</td><td>Trip</td></tr><tr><td>301</td><td>Rated DC residual operating current <span class="math">I_{\Delta dc}</span></td><td>6mA</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><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><td>-</td></tr><tr><td>304</td><td>Rated AC residual non-operating current <span class="math">I_{\Delta nc}</span></td><td>15mA</td><td>-</td></tr><tr><td>305</td><td>Electrical endurance</td><td>20,000</td><td>20,000</td></tr><tr><td>306</td><td>Rated operating temperature</td><td>-40~85 ℃</td><td>-40~85 ℃</td></tr><tr><td>307</td><td>Pollution degree</td><td>2</td><td>2</td></tr></tbody></table>

***

### 3. Residual Current Detection Characteristics

#### **Operating Current**

<table><thead><tr><th width="79">#</th><th width="348">Description</th><th>AC&#x26;DC fault signal</th><th>DC fault signal</th></tr></thead><tbody><tr><td>401</td><td>Operating current for smooth DC</td><td>4.0~6.0 mA</td><td>4.0~6.0 mA</td></tr><tr><td>402</td><td>Operating current for 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>Operating current for 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>Operating current for sinewave AC</td><td>22.0~28.0 mA</td><td>-</td></tr><tr><td>405</td><td>Operating current for A0 pulsating DC</td><td>10.5~42.0 mA</td><td>-</td></tr><tr><td>406</td><td>Operating current for A90 pulsating DC</td><td>7.5~42.0 mA</td><td>-</td></tr><tr><td>407</td><td>Operating current for A135 pulsating DC</td><td>3.3~42.0 mA</td><td>-</td></tr></tbody></table>

#### **Operating Time**

<table><thead><tr><th width="82">#</th><th width="345">Description</th><th>AC&#x26;DC fault signal</th><th>DC fault signal</th></tr></thead><tbody><tr><td>501</td><td>Response time for 6mA smooth DC residual current</td><td>≤ 500 ms</td><td>≤ 500 ms</td></tr><tr><td>502</td><td>Response time for 60mA smooth DC residual current</td><td>≤ 200 ms</td><td>≤ 200 ms</td></tr><tr><td>503</td><td>Response time for 200mA smooth DC residual current</td><td>≤ 70 ms</td><td>≤ 70 ms</td></tr><tr><td>504</td><td>Response time for 300mA smooth DC residual current</td><td>≤ 20 ms</td><td>-</td></tr><tr><td>505</td><td>Response time for 60mA DC rectified from 2 phases</td><td>≤ 200 ms</td><td>≤ 200 ms</td></tr><tr><td>506</td><td>Response time for 200mA DC rectified from 2 phases</td><td>≤ 70 ms</td><td>≤ 70 ms</td></tr><tr><td>507</td><td>Response time for 300mA DC rectified from 2 phases</td><td>≤ 20 ms</td><td>-</td></tr><tr><td>508</td><td>Response time for 60mA DC rectified from 3 phases</td><td>≤ 200 ms</td><td>≤ 200 ms</td></tr><tr><td>509</td><td>Response time for 200mA DC rectified from 3 phases</td><td>≤ 70 ms</td><td>≤ 70 ms</td></tr><tr><td>510</td><td>Response time for 300mA DC rectified from 3 phases</td><td>≤ 20 ms</td><td>-</td></tr><tr><td>511</td><td>Response time for 30mA AC residual current</td><td>≤ 80 ms</td><td>> 10000 ms</td></tr><tr><td>512</td><td>Response time for 60mA AC residual current</td><td>≤ 60 ms</td><td>> 300 ms</td></tr><tr><td>513</td><td>Response time for 150mA AC residual current</td><td>≤ 20 ms</td><td>> 80 ms</td></tr><tr><td>514</td><td>Response time for 5A AC residual current</td><td>≤ 20 ms</td><td>> 80 ms</td></tr></tbody></table>

***

### 4. Application Notes

{% tabs %}
{% tab title="PCB-mount Version" %}
By adjusting the resistors between Fault signal pin of the BRCS01/01X sensors and charging controller MCU, GPIO ports of a 3.3V MCU at an EV charging controller can be used to read Normal/Trip status.

#### **Typical application diagram**

<div align="left"><figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2Fdnq14q0yTBiBEv3Q4ang%2Fimage.png?alt=media&amp;token=a441e321-1e01-4fb6-a32a-8b3543e1c36a" alt="" width="533"><figcaption></figcaption></figure></div>

* R0=10K ohm (Built in BRCS01/01X)
* R3=R4=R5=5.1K ohm
* R1=330 ohm, R2=680 ohm
* D1: TVS SMBJ5.0A
* Q1: S9013
* C1=C2=100nF
* <Normal@0.3VDC>, <TRIP@3.3VDC>

> ⚠️ **Attention**: More electronic components at charging controllers than those showed in the simplified diagram might be added depending on the overall charging controller design.

#### **Self-test time chart**

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FLziDulN1T8Foj8cA1qiZ%2Fimage.png?alt=media&amp;token=720f0dc3-d408-4529-a9bd-187ec206f33e" alt=""><figcaption></figcaption></figure>

$$t\_1$$ is the response time for internally generated test current. A self-test excluding offset calibration is activated if Pin 3 - Test is connected to ground for a period of **200ms to 4s** (Normally 300ms is recommended).

#### **Offset calibration**

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2F9XEEKM7WhHT7Vnk1Vixz%2Fimage.png?alt=media&amp;token=5e0eb267-cae3-4077-95a3-7927963df7fa" alt=""><figcaption></figcaption></figure>

* BRCS01 enters calibration mode when the Test pin is connected to ground for 4–5 seconds (recommended: 4.5 s ± 5%). During calibration, the Trip pin does not output any high-level signal.
* BRCS01X enters calibration mode when the Test pin is connected to ground for 2–3 seconds (recommended: 2.5 s ± 5%). During calibration, the Trip pin outputs a high-level signal for approximately 300 ms, allowing users to clearly identify when the calibration process has begun.

An offset calibration can be activated at regular intervals (e.g. startup) or after the occur of certain critical events (e.g. short circuit).

> ⚠️ **Attention**: During the offset calibration, **NO leakage current or any other current may flow through the sensor**. Please ensure voltage supply of **5VDC ± 3%** to the sensor and remain the main-circuit contactors/relays open.
> {% endtab %}

{% tab title="Flexible Version" %}
IEC 62955 Annex N.8.3 specifies that the M-module with facilitate for connection of an external detection module shall cause opening of the switching or protective device within 10s, if the external detection module is disconnected. A three-level voltage output at Fault signal pin of the BRCS01/01X sensors facilitate built-in RDC-DD at EV charger to meet this requirement.

#### **Typical application diagram**

<div align="left"><figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2F6Q8AyaKUmJb40SeupSEY%2Fimage.png?alt=media&amp;token=3d3bd65e-c9fb-4069-a7d7-827368195f3e" alt="" width="563"><figcaption></figcaption></figure></div>

* R0=10K ohm (Built in BRCS01/01X)
* R3=R4=5.1K ohm
* R1=R2=10K ohm
* D1: TVS SMBJ5.0A
* Q1: S9013
* C1=C2=100nF
* <Normal@2.5V>, <TRIP@5.0V>, OFF\@0V
* Fault output with 3 level voltage (Possible to fulfil IEC 62955 Annex N.8.3)

⚠️ **Attention**: More electronic components at charging controllers than those showed in the simplified diagram might be added depending on the overall charging controller design.

#### **Self-test time chart**

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FLziDulN1T8Foj8cA1qiZ%2Fimage.png?alt=media&amp;token=720f0dc3-d408-4529-a9bd-187ec206f33e" alt=""><figcaption></figcaption></figure>

$$t\_1$$ is the response time for internally generated test current. A self-test excluding offset calibration is activated if Pin 3 - Test is connected to ground for a period of **200ms to 4s** (Normally 300ms is recommended).

#### **Offset calibration**

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2F9XEEKM7WhHT7Vnk1Vixz%2Fimage.png?alt=media&amp;token=5e0eb267-cae3-4077-95a3-7927963df7fa" alt=""><figcaption></figcaption></figure>

* BRCS01 enters calibration mode when the Test pin is connected to ground for 4–5 seconds (recommended: 4.5 s ± 5%). During calibration, the Trip pin does not output any high-level signal.
* BRCS01X enters calibration mode when the Test pin is connected to ground for 2–3 seconds (recommended: 2.5 s ± 5%). During calibration, the Trip pin outputs a high-level signal for approximately 300 ms, allowing users to clearly identify when the calibration process has begun.

An offset calibration can be activated at regular intervals (e.g. startup) or after the occur of certain critical events (e.g. short circuit).

> ⚠️ **Attention**: During the offset calibration, **NO leakage current or any other current may flow through the sensor**. Please ensure voltage supply of **5VDC ± 3%** to the sensor and remain the main-circuit contactors/relays open.
> {% endtab %}
> {% endtabs %}

***

### 5. Additional Product Illustration

{% tabs %}
{% tab title="PCB-mount version" %}

<div align="left"><figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FuEf2CGrfTTVueZ3bhyr3%2Fimage.png?alt=media&amp;token=cd206782-93c1-44ee-be4d-25641dc30a18" alt=""><figcaption></figcaption></figure></div>

* BRCS01-DC6-L / BRCS01-ADC-L
* BRCS01X-DC6-L / BRCS01X-ADC-L

**4 Pin Interface:**

* **Pin 1:** 5VDC
* **Pin 2:** GND
* **Pin 3:** TEST
* **Pin 4:** TRIP

<div align="left"><figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2F3OegbRuQeAy6OTrpSnZx%2Fimage.png?alt=media&amp;token=6eada56d-eb98-479a-b619-89727f572959" alt=""><figcaption></figcaption></figure> <figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FFwSnDZUWQ3SI96amNTgj%2Fimage.png?alt=media&amp;token=f2553b83-38b5-4cda-8c8f-ba5994e6627a" alt=""><figcaption></figcaption></figure></div>
{% endtab %}

{% tab title="Flexible version" %}

<div align="left"><figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2F0kaharXA3XMRIZRM41mv%2Fimage.png?alt=media&amp;token=31a035bc-3693-4a2d-87b5-4483562a7bc7" alt="" width="280"><figcaption></figcaption></figure></div>

**16.2mm Aperture**

* BRCS01-DC6-H2 / BRCS01-ADC-H2
* BRCS01X-DC6-H2 / BRCS01X-ADC-H2

**XHB 2.5mm connector:**

* **Red:** 5VDC
* **Black:** GND
* **Green/Yellow:** TEST
* **White:** TRIP

MOLEX 0353120460 can be used at the charging controller side.
{% endtab %}
{% endtabs %}

***

### 6. Ordering Information

<table><thead><tr><th width="71">#</th><th width="183">Order Number</th><th>Description</th></tr></thead><tbody><tr><td>1</td><td><strong>BRCS01X-ADC-H2</strong></td><td>⚠️NRND<br>BRCS01X Residual Current Sensor (Closed-loop fluxgate), A30+DC6mA<br>Flexible, XHB 4Pin, Pitch=2.5mm, 220mm cable</td></tr><tr><td>2</td><td><strong>BRCS01X-DC6-H2</strong></td><td>⚠️NRND<br>BRCS01X Residual Current Sensor (Closed-loop fluxgate), DC6mA<br>Flexible, XHB 4Pin, Pitch=2.5mm, 220mm cable</td></tr><tr><td>3</td><td><strong>BRCS01X-ADC-L</strong></td><td>BRCS01X Residual Current Sensor (Closed-loop fluxgate), A30+DC6mA<br>PCB-mounting, 4Pin, Pitch=2.54mm</td></tr><tr><td>4</td><td><strong>BRCS01X-DC6-L</strong></td><td>BRCS01X Residual Current Sensor (Closed-loop fluxgate), DC6mA<br>PCB-mounting, 4Pin, Pitch=2.54mm</td></tr><tr><td>5</td><td><strong>BRCS01-ADC-H2</strong></td><td><p>⚠️NRND</p><p>BRCS01 Residual Current Sensor (Open-loop fluxgate), A30+DC6mA<br>Flexible, XHB 4Pin, Pitch=2.5mm, 220mm cable</p></td></tr><tr><td>6</td><td><strong>BRCS01-DC6-H2</strong></td><td><p>⚠️NRND</p><p>BRCS01 Residual Current Sensor (Open-loop fluxgate), DC6mA<br>Flexible, XHB 4Pin, Pitch=2.5mm, 220mm cable</p></td></tr><tr><td>7</td><td><strong>BRCS01-ADC-L</strong></td><td>⚠️NRND<br>BRCS01 Residual Current Sensor (Open-loop fluxgate), A30+DC6mA<br>PCB-mounting, 4Pin, Pitch=2.54mm</td></tr><tr><td>8</td><td><strong>BRCS01-DC6-L</strong></td><td>⚠️NRND<br>BRCS01 Residual Current Sensor (Open-loop fluxgate), DC6mA<br>PCB-mounting, 4Pin, Pitch=2.54mm</td></tr></tbody></table>

***

### 8. 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** 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.