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BRCS01 - IEC

BRCS01/01X - IEC

Applies to: BRCS01/01X AC/DC Residual Current Sensor (IEC 62955) | Last Updated: 2026-09-28

1. Introduction

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

#
Technical Specification
BRCS01-ADC-* / BRCS01X-ADC-*
BRCS01-DC6-* / BRCS01X-DC6-*

101

Rated operating voltage in monitoring circuit

230/400VAC

230/400VAC

102

Rated current in monitoring circuit

≤ 32A

≤ 32A

103

Poles in monitoring circuit

1P+N / 3P+N

1P+N / 3P+N

104

Frequency in monitoring circuit

50Hz

50Hz

105

Rated impulse withstand voltage in monitoring circuit

4kV

4kV

106

Over-voltage category in monitoring circuit

III

III

201

Rated operating voltage in control circuit

5VDC ± 3%

5VDC ± 3%

202

Power consumption

< 500mW

< 500mW

203

Pin 1 - Vcc

+5VDC

+5VDC

204

Pin 2 - GND

GND

GND

205

Pin 3 - Test signal input

Test 1)

Test 1)

206

Pin 4 - Fault signal output

Trip

Trip

301

Rated DC residual operating current IΔdcI_{\Delta dc}

6mA

6mA

302

Rated DC residual non-operating current IΔndcI_{\Delta ndc}

3mA

3mA

303

Rated AC residual operating current IΔnI_{\Delta n}

30mA

-

304

Rated AC residual non-operating current IΔncI_{\Delta nc}

15mA

-

305

Electrical endurance

20,000

20,000

306

Rated operating temperature

-40~85 ℃

-40~85 ℃

307

Pollution degree

2

2

3. Residual Current Detection Characteristics

Operating Current

#
Description
AC&DC fault signal
DC fault signal

401

Operating current for smooth DC

4.0~6.0 mA

4.0~6.0 mA

402

Operating current for DC rectified from 2 phases

4.0~7.0 mA

4.0~7.0 mA

403

Operating current for DC rectified from 3 phases

4.0~6.2 mA

4.0~6.2 mA

404

Operating current for sinewave AC

22.0~28.0 mA

-

405

Operating current for A0 pulsating DC

10.5~42.0 mA

-

406

Operating current for A90 pulsating DC

7.5~42.0 mA

-

407

Operating current for A135 pulsating DC

3.3~42.0 mA

-

Operating Time

#
Description
AC&DC fault signal
DC fault signal

501

Response time for 6mA smooth DC residual current

≤ 500 ms

≤ 500 ms

502

Response time for 60mA smooth DC residual current

≤ 200 ms

≤ 200 ms

503

Response time for 200mA smooth DC residual current

≤ 70 ms

≤ 70 ms

504

Response time for 300mA smooth DC residual current

≤ 20 ms

-

505

Response time for 60mA DC rectified from 2 phases

≤ 200 ms

≤ 200 ms

506

Response time for 200mA DC rectified from 2 phases

≤ 70 ms

≤ 70 ms

507

Response time for 300mA DC rectified from 2 phases

≤ 20 ms

-

508

Response time for 60mA DC rectified from 3 phases

≤ 200 ms

≤ 200 ms

509

Response time for 200mA DC rectified from 3 phases

≤ 70 ms

≤ 70 ms

510

Response time for 300mA DC rectified from 3 phases

≤ 20 ms

-

511

Response time for 30mA AC residual current

≤ 80 ms

> 10000 ms

512

Response time for 60mA AC residual current

≤ 60 ms

> 300 ms

513

Response time for 150mA AC residual current

≤ 20 ms

> 80 ms

514

Response time for 5A AC residual current

≤ 20 ms

> 80 ms

4. Application Notes

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

  • 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

t1t_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

  • 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.

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

  • 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

t1t_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

  • 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.

5. Additional Product Illustration

  • 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

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.

6. Ordering Information

#
Order Number
Description

1

BRCS01X-ADC-H2

⚠️NRND BRCS01X Residual Current Sensor (Closed-loop fluxgate), A30+DC6mA Flexible, XHB 4Pin, Pitch=2.5mm, 220mm cable

2

BRCS01X-DC6-H2

⚠️NRND BRCS01X Residual Current Sensor (Closed-loop fluxgate), DC6mA Flexible, XHB 4Pin, Pitch=2.5mm, 220mm cable

3

BRCS01X-ADC-L

BRCS01X Residual Current Sensor (Closed-loop fluxgate), A30+DC6mA PCB-mounting, 4Pin, Pitch=2.54mm

4

BRCS01X-DC6-L

BRCS01X Residual Current Sensor (Closed-loop fluxgate), DC6mA PCB-mounting, 4Pin, Pitch=2.54mm

5

BRCS01-ADC-H2

⚠️NRND

BRCS01 Residual Current Sensor (Open-loop fluxgate), A30+DC6mA Flexible, XHB 4Pin, Pitch=2.5mm, 220mm cable

6

BRCS01-DC6-H2

⚠️NRND

BRCS01 Residual Current Sensor (Open-loop fluxgate), DC6mA Flexible, XHB 4Pin, Pitch=2.5mm, 220mm cable

7

BRCS01-ADC-L

⚠️NRND BRCS01 Residual Current Sensor (Open-loop fluxgate), A30+DC6mA PCB-mounting, 4Pin, Pitch=2.54mm

8

BRCS01-DC6-L

⚠️NRND BRCS01 Residual Current Sensor (Open-loop fluxgate), DC6mA PCB-mounting, 4Pin, Pitch=2.54mm

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.

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