GFB1L-40 Electronic Residual Current Circuit Breaker (RCBO)
GFB1L-40 Electronic residual current circuit breaker (RCBO) Mainly used for 50Hz AC transmission, rated voltage up to 230V and rated current up to 40A, it serves as overload and short circuit protection for power lines. It can also be used for infrequent switching of electrical devices and power lines under normal conditions.
● Standard: IEC/EN 61009-1
● Rated current: 6A~40A
● Rated voltage: 230/400V~
● Number of poles: 1P+N
● Rated short-circuit breaking capacity: 6kA
● Type: AC, A
● Tripping curve: B, C
● Ambient air temperature: -35℃~+70℃
● Connection: Both ends can be used as input terminals
● Certificates: CB,CE, UKCA,SEMKO
Product Description
●Model and Meaning ●Introduction
GFB1L-40 Electronic residual current circuit breaker is an electrical safety device based on electronic technology to achieve leakage protection. It is mainly used to detect the residual current (leakage current) in the circuit, and quickly cut off the circuit when the set threshold is reached, to prevent electric shock or electrical fire accidents.
Ⓐ Core Features
● Leakage protection: monitors the current difference between the live wire and the neutral wire in the line in real time (usually in milliampere level). When the leakage current exceeds the set value (such as 30mA, 500mA, etc.), the circuit breaker trips within 0.1 seconds.
● Overload/short circuit protection: Some models integrate overcurrent protection function, which can replace the traditional circuit breaker.
Ⓑ How it works
● Signal acquisition: The residual current in the line is detected by the built-in zero-sequence current transformer (CT).
● Electronic amplification and processing: the weak leakage current signal is amplified and sent to the electronic chip for analysis and comparison with the preset threshold.
● Trip action: If the leakage current exceeds the limit, the chip triggers the electromagnetic trip mechanism to disconnect the circuit. The response time is usually ≤30ms.
Ⓒ Use Cases
● Civilian: residential distribution box, bathroom/kitchen and other wet environment.
● Industry: production lines, data centers, and other places sensitive to ground faults.
● Medical: operating room IT system (for use with insulation monitoring).
Product complies with standard: IEC/EN 61009-1
●Technical Parameters
Product Model | GFB1L-40 |
Number of Poles | 1P+N |
Rated current (In) | 6A,10A,16A,20A,25A,32A,40A |
Rated short-circuit breaking capacity | 6kA |
Rated voltage (Ue) | 240V AC（50/60Hz） |
Rated impulse withstand voltage (1.2/50) (kV) | 4kV |
Dielectric test voltage (V) | (1 minute at power frequency) 2000 |
Electrical Life | 10000 Cycles |
Mechanical Life | 20000 Cycles |
Contact Position Indicator | Yes, ON (red); OFF (green) |
Protection Degree | IP20 |
Ambient Temperature | -35℃~+70℃, Maximum Humidity 95% |
Datum temperature | 30℃ |
Terminal/Cable size | 16mm² |
Installation | Mounting on 35mm DIN rail |
Torque (N·m) | 2.5 |
●Product Types Choosing
| Rated Current | Rated Residual Operation Current(I△n) | Product Number | |
| Type B | Type C | ||
| 6A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40B0610 GFB1L-40B0630 | GFB1L-40C0610 GFB1L-40C0630 |
| 10A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40B1010 GFB1L-40B1030 | GFB1L-40C1010 GFB1L-40C1030 |
| 16A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40B1610 GFB1L-40B1630 | GFB1L-40C1610 GFB1L-40C1630 |
| 20A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40B2010 GFB1L-40B2030 | GFB1L-40C2010 GFB1L-40C2030 |
| 25A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40B2510 GFB1L-40B2530 | GFB1L-40C2510 GFB1L-40C2530 |
| 32A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40B3210 GFB1L-40B3230 | GFB1L-40C3210 GFB1L-40C3230 |
| 40A | 10mA、30mA、100mA、300mA、500mA | GFB1L-40B4010 GFB1L-40B4030 | GFB1L-40C4010 GFB1L-40C4030 |
●Connecting lead
Rated current In (A) | Nominal cross-sectional area S (mm²) of copper wire |
6、10、16、20、25、32 | 4 |
40 | 6 |
●Appearance and Installation Dimensions ●Characteristic Curves
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Yueqing City,Wenzhou City,Zhejiang Province,China
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