GFB1L-40B Electronic Residual Current Circuit Breaker（B Type RCBO）
GFB1L-40B Electronic residual current circuit breaker （B Type RCBO） for modern electrical systems, supporting 230/240V and up to 40A. It protects against overcurrent, short circuits, and earth leakages, with advanced DC residual current detection for EV chargers, solar PVs, and heat pumps. Rated 6kA, bidirectional, and compliant with IEC/EN standards, it ensures reliable performance.
● Standard: IEC/EN 61009-1,IEC/EN 62423
● Residual Current Type: B
● Rated current: 6A,10A,16A, 20A, 25A, 32A, 40A
● Rated voltage: 230/240V~
● Number of poles: 1P+N
● Rated Residual Operating Current (IΔn): 10mA, 30mA, 100mA, 300mA, 500mA
● Rated short-circuit breaking capacity: 6kA
● Tripping curve: B, C
● Ambient air temperature：-35℃~+70 ºC
● Incoming method: Bi-directional
● Certificates: CB,CE, UKCA,SEMKO
Product Description
●Model and Meaning ●Introduction
Ⓐ GFB1L-40B Electronic residual current circuit breaker （B Type RCBO） This advanced circuit protection device efficiently handles overcurrent, short circuits, and earth fault leakages, while being specifically designed to detect complex waveforms and DC residual currents. design makes it ideal for modern electrical installations where space is limited.
Ⓑ GFB1L-40B Electronic residual current circuit breaker （B Type RCBO） operates at a rated voltage of 230/240V and supports a maximum current of up to 40A. It features a residual current sensitivity of 30mA and a short-circuit rating of 6kA. Additionally, it offers both B curve and C curve characteristics, making it an ideal solution for safeguarding sensitive electronic equipment such as electric vehicle chargers, solar panels, and heat pumps.
Ⓒ The product provides a reliable and efficient protection solution for sensitive electronic equipment in residential, commercial and industrial environments.
● Product complies with standard: IEC/EN 61009-1,IEC/EN 62423
● Compact Design: Module（18mm）structure saves distribution board space, making it ideal for modern, space-efficient installations or retrofits.
● Rated current (In): Rated current can reach up to 40A.
● High Performance: 6kA short circuit rating with B or C curve options to meet diverse application needs.
● Bidirectional Wiring Capability: Enables conductors to be terminated from either the top or bottom terminals, providing installation flexibility across diverse panel configurations while maintaining uniform electrical characteristics.
● DC Residual Current Detection: Specifically designed for complex waveforms and DC residual currents, ideal for EV chargers, solar PV systems, and heat pumps.
● Comprehensive Protection: Offers overload, short circuit, and residual current protection to ensure circuit safety.
●Technical Parameters
Product Model | GFB1L-40B |
Product complies with standard | IEC/EN 61009-1,IEC/EN 62423 |
No. of poles | 1P+N,1 Module, N line with disconnected |
Rated current (In) | 6A,10A,16A,20A,25A,32A,40A |
Rated sensitivity currents (IΔn) | 10mA, 30mA, 100mA, 300mA,500mA |
Rated short-circuit breaking capacity | 6kA |
Energy limiting class | 3 |
Rated voltage (Ue) | 240V AC（50/60Hz） |
Rated impulse withstand voltage (1.2/50) Uimp | 4kV |
Dielectric test voltage at ind.Freq. for 1min | 2kV |
Protection | Ground fault, Overcurrent and short circuit |
Residual current type | B: residual AC, pulsating and smooth DC current, high frequency (≤1kHz) |
Dielectric test voltage | 960±15°C (Enclosure), 650±10°C (Handle) |
Terminal connection type | Cable / Pin-type busbar |
Residual current off-time under I△n | ≤0.1s |
Reted residual making and breaking capacity (I△m) | 500A(In≤50A) |
Thermal release characteristic | (1.13-1.45) x In |
Magnetic release characteristic | B:(3-5) x In, C:(5-10) x In |
Electrical Life | 10000 Cycles |
Mechanical Life | 20000 Cycles |
Contact Position Indicator | Yes, ON (red); OFF (green) |
Ambient Temperature | -35℃~+70℃, Maximum Humidity 95% |
Datum temperature | 30℃ |
Protection Degree | IP20 |
Max. terminal size for cable | 16mm² |
Max. tightening torque | 2.0N·m |
Installation | Mounting on 35mm DIN rail |
Incoming method | Bi-directional |
●Product Types Choosing
| Rated Current | Rated Residual Operation Current(I△n) | Product Number | |
| Type B | Type C | ||
| 6A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40BB0610 GFB1L-40BB0630 | GFB1L-40BC0610 GFB1L-40BC0630 |
| 10A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40BB1010 GFB1L-40BB1030 | GFB1L-40BC1010 GFB1L-40BC1030 |
| 16A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40BB1610 GFB1L-40BB1630 | GFB1L-40BC1610 GFB1L-40BC1630 |
| 20A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40BB2010 GFB1L-40BB2030 | GFB1L-40BC2010 GFB1L-40BC2030 |
| 25A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40BB2510 GFB1L-40BB2530 | GFB1L-40BC2510 GFB1L-40BC2530 |
| 32A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40BB3210 GFB1L-40BB3230 | GFB1L-40BC3210 GFB1L-40BC3230 |
| 40A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40BB4010 GFB1L-40BB4030 | GFB1L-40BC4010 GFB1L-40BC4030 |
●Connecting lead
Rated current In (A) | Nominal cross-sectional area S (mm²) of copper wire |
6、10 | 1-2.5 |
16 | 2.5-4 |
20、25 | 4-6 |
32 | 6-10 |
40 | 10-16 |
●Appearance and Installation Dimensions ●Characteristic Curves
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Yueqing Good Future Electrical Co.,Ltd.
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No.136-138,Xinguang Avenue,Xinguang lndustrial Zone,Liushi Town
Yueqing City,Wenzhou City,Zhejiang Province,China
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