> 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-ul.md).

# BRCS03C - UL

## BRCS03C-U5/U6 - UL & IEC

{% hint style="info" %}
**Applies to:** BRCS03C-U5/U6 Residual Current Sensor (UL 2231-2 (CCID20) and IEC 62955 / IEC 62752) | **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%2FStOM7m4S40r8nSKvknCF%2Fimage.png?alt=media&amp;token=567e96d4-7db2-4596-9207-5e9f13f15b49" alt=""><figcaption></figcaption></figure></div>

The BRCS03C-U5/BRCS03C-U6 is an AC/DC residual current sensor with two separate fault signal outputs – one Pin conforming to UL2231-2 (CCID20) and the other Pin conforming to IEC 62955 or IEC 62752. It can be used for built-in residual current protection system at AC charging stations.

* Digital outputs of fault detection conforming to UL2231-2 (CCID20) and IEC 62955 / IEC 62752
* Cost-effective solution of residual current detection for mode-2/3 EVSE
* Fast response time facilitating a broad selection of switching devices
* Accurate measurement and optimization against nuisance tripping

***

### 2. Technical Data

| #   | Technical Specification                                                 | BRCS03C-U5              | BRCS03C-U6              |
| --- | ----------------------------------------------------------------------- | ----------------------- | ----------------------- |
| 101 | Poles in monitoring circuit                                             | 1P+N / 3P+N             | 1P+N / 3P+N             |
| 102 | Rated current in monitoring circuit                                     | 32A                     | 32A                     |
| 103 | Rated frequency in monitoring circuit                                   | 60Hz                    | 60Hz                    |
| 104 | Rated impulse withstand voltage in monitoring circuit                   | 6kV                     | 6kV                     |
| 105 | Over-voltage category in monitoring circuit                             | III                     | III                     |
| 201 | Rated operating voltage in control circuit, $$V\_{cc}$$                 | 5VDC ± 3%               | 5VDC ± 3%               |
| 202 | Power consumption                                                       | < 500mW                 | < 500mW                 |
| 203 | Pin 1 – N.C.                                                            | Not connected           | Not connected           |
| 204 | Pin 2 – Test signal                                                     | Digital input           | Digital input           |
| 205 | Pin 3 – Fault signal: X6-IEC62955 (RDC-MD) or X30-IEC62752 (IC-CPD)     | Digital output (RDC-MD) | Digital output (IC-CPD) |
| 206 | Pin 4 – Fault signal: X20-UL2231 (CCID20)                               | Digital output          | Digital output          |
| 207 | Pin 5 – GND                                                             | GND                     | GND                     |
| 208 | Pin 6 – Vcc for 5V                                                      | +5VDC                   | +5VDC                   |
| 301 | Rated DC residual operating current $$I\_{\Delta dc}$$ (IEC 62955)      | 6mA                     | 6mA                     |
| 302 | Rated DC residual non-operating current $$I\_{\Delta ndc}$$ (IEC 62955) | 3mA                     | 3mA                     |
| 303 | Rated AC residual operating current $$I\_{\Delta n}$$ (UL2231-2)        | 20mA                    | 20mA                    |
| 304 | Rated AC residual non-operating current $$I\_{\Delta nc}$$ (UL2231-2)   | 15mA                    | 15mA                    |
| 305 | Rated AC residual operating current $$I\_{\Delta n}$$ (IEC 62752)       | -                       | 30mA                    |
| 306 | Rated AC residual non-operating current $$I\_{\Delta nc}$$ (IEC 62752)  | -                       | 15mA                    |
| 307 | Electrical endurance                                                    | 20,000                  | 20,000                  |
| 308 | Rated operating temperature                                             | -40\~85 ℃               | -40\~85 ℃               |
| 309 | Pollution degree                                                        | 2                       | 2                       |

***

### 3. Residual Current Detection Characteristics

#### **PIN 3 (X6/X30 Output) - IEC 62955 / IEC 62752**

**Operating Current**

| #   | Operating Current          | PIN 3 (X6) @BRCS03C-U5 | PIN 3 (X30) @BRCS03C-U6 |
| --- | -------------------------- | ---------------------- | ----------------------- |
| 401 | Smooth DC                  | 4.0\~6.0 mA            | 4.0\~6.0 mA             |
| 402 | DC rectified from 2 phases | 4.0\~7.0 mA            | 4.0\~7.0 mA             |
| 403 | DC rectified from 3 phases | 4.0\~6.2 mA            | 4.0\~6.2 mA             |
| 404 | Sinewave AC                | -                      | 22.0\~28.0 mA           |
| 405 | A0 pulsating DC            | -                      | 10.5\~42.0 mA           |
| 406 | A90 pulsating DC           | -                      | 7.5\~42.0 mA            |
| 407 | A135 pulsating DC          | -                      | 3.3\~42.0 mA            |

**Operating Time**

| #   | Response time                    | PIN 3 (X6) @BRCS03C-U5 | PIN 3 (X30) @BRCS03C-U6 |
| --- | -------------------------------- | ---------------------- | ----------------------- |
| 501 | Smooth DC 6mA                    | ≤ 500 ms               | ≤ 500 ms                |
| 502 | Smooth DC 60mA                   | ≤ 200 ms               | ≤ 200 ms                |
| 503 | Smooth DC 200mA                  | ≤ 70 ms                | ≤ 70 ms                 |
| 504 | Smooth DC 300mA                  | -                      | ≤ 20 ms                 |
| 505 | DC rectified from 2 phases 60mA  | ≤ 200 ms               | ≤ 200 ms                |
| 506 | DC rectified from 2 phases 200mA | ≤ 70 ms                | ≤ 70 ms                 |
| 507 | DC rectified from 2 phases 300mA | -                      | ≤ 20 ms                 |
| 508 | DC rectified from 3 phases 60mA  | ≤ 200 ms               | ≤ 200 ms                |
| 509 | DC rectified from 3 phases 200mA | ≤ 70 ms                | ≤ 70 ms                 |
| 510 | DC rectified from 3 phases 300mA | -                      | ≤ 20 ms                 |
| 511 | AC 30mA                          | > 10000 ms             | ≤ 80 ms                 |
| 512 | AC 60mA                          | > 300 ms               | ≤ 60 ms                 |
| 513 | AC 150mA                         | > 80 ms                | ≤ 20 ms                 |
| 514 | AC 5A                            | > 80 ms                | ≤ 20 ms                 |

**PIN 4 (X20 Output) - UL2231-2 (CCID-20)**

**Operating Current**

| #   | Operating Current | PIN 4 (X20 Output) @BRCS03C-U5/U6 |
| --- | ----------------- | --------------------------------- |
| 601 | 60Hz sinewave AC  | 15.0\~20.0 mA                     |
| 602 | 150Hz sinewave AC | 15.0\~34.5 mA                     |
| 603 | 400Hz sinewave AC | 15.0\~69.6 mA                     |
| 604 | Smooth DC         | 20.0\~56.0 mA                     |

**Operating Time**

| #   | Response time                    | PIN 4 (X20 Output) @BRCS03C-U5/U6 |
| --- | -------------------------------- | --------------------------------- |
| 701 | 20mA AC residual current (60Hz)  | ≤ 500 ms                          |
| 702 | 100mA AC residual current (60Hz) | ≤ 20 ms                           |
| 703 | 264mA AC residual current (60Hz) | ≤ 15 ms                           |
| 704 | 56mA smooth DC residual current  | ≤ 40 ms                           |
| 705 | 100mA smooth DC residual current | ≤ 20 ms                           |

***

### 4. Application Notes

**Typical application diagram**

<p align="center">                BRCS03C-U5/U6                                            EV charging controller</p>

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FPNfao3FdtDfUFgC6eAo1%2Fimage.png?alt=media&amp;token=aa2d2764-fb48-4256-9101-67e036c03b66" 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 and Pin 4 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%2FjSQPUhXeqYeTyXehkt05%2Fimage.png?alt=media&amp;token=aa6cad7a-d021-41cf-8aea-687fc1d59291" 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%2Fbdc92WNUsiljs2LibH3W%2Fimage.png?alt=media&amp;token=f903a183-099d-4658-9c41-03c136cda92a" alt=""><figcaption></figcaption></figure>

An explicit offset calibration excluding self-test cycle 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%**.

**Figures**

![](https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FavNokEGi12U8wU4RU5A9%2Fimage.png?alt=media\&token=d6518b2e-5987-471f-bfb3-b04a6c11e0d8)

If the trip-level $$I\_{\Delta T}$$ is accomplished the output will change their state from low-level to high level. Depending on the existence of the residual current $$I\_{\Delta}$$, the output will remain in this state until $$I\_{\Delta}$$ falls below the threshold $$I\_{\Delta R}$$.

* **X20 Pin (CCID20):** Typical values of $$I\_{\Delta T}$$ DC 26mA & AC 17.5mA; Typical value of $$I\_{\Delta R}$$ is 75%.
* **X30 Pin (IEC 62752):** Typical values of $$I\_{\Delta T}$$ DC 5mA & AC 24mA; Typical value of $$I\_{\Delta R}$$ is 75%.
* **X6 Pin (IEC 62955):** Typical values of $$I\_{\Delta T}$$ DC 5mA; Typical value of $$I\_{\Delta R}$$ is 75%.

***

### 5. Mechanical outline

BRCS03C-U5-L1 / BRCS03C-U6-L1:

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FZgFWxSyXM013M4Vr0QDQ%2Fimage.png?alt=media&amp;token=cf96f760-7112-4896-ab85-b3bd4b892227" alt=""><figcaption></figcaption></figure>

| Model             | Pin 1 | Pin 2 | Pin 3                     | Pin 4                          | Pin 5 | Pin 6 |
| ----------------- | ----- | ----- | ------------------------- | ------------------------------ | ----- | ----- |
| **BRCS03C-U5-L1** | -     | Test  | DC fault (IEC 62955)      | AC & DC fault (UL2231(CCID20)) | GND   | 5V DC |
| **BRCS03C-U6-L1** | -     | Test  | AC & DC fault (IEC 62752) | AC & DC fault (UL2231(CCID20)) | GND   | 5V DC |

***

### 6. Ordering information

| # | Order Number      | Description                                                                                                                                                     |
| - | ----------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 1 | **BRCS03C-U5-L1** | <p><strong>BRCS03C Residual Current Sensor</strong><br>5V DC Interface, PCB-mount (Copper jumper)<br>UL2231-2(CCID20) & IEC62955, 32A<br>6 Pin, Pitch=1.9mm</p> |
| 2 | **BRCS03C-U6-L1** | <p><strong>BRCS03C Residual Current Sensor</strong><br>5V DC Interface, PCB-mount (Copper jumper)<br>UL2231-2(CCID20) & IEC62752, 32A<br>6 Pin, Pitch=1.9mm</p> |

***

#### 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.