GFB1L-50H Electronic Residual Current Circuit Breaker (RCBO)
GFB1L-50H Electronic residual current circuit breaker (RCBO) circuit breakers are mainly used for AC 50Hz, rated voltage up to 230V, rated current up to 50A lines as the overload and short circuit protection of the power lines. At the same time, they can also be used to frequently switch off and on the electrical devices and power lines under normal conditions.
● Standard: IEC/EN 61009-1
● Rated current: 1A,2A,3A,4A,5A,6A,10A,16A,20A,25A,32A,40A,50A
● Rated voltage: 230/240V~
● Number of poles: 1P+N
● Rated short-circuit breaking capacity: 10kA
● 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-50H Electronic Residual Current Breaker (RCBO) is a low-voltage electrical device that integrates overload, short-circuit, and leakage protection functions. It is primarily used in AC distribution circuits operating at 50Hz with rated voltages ≤230V and rated currents ≤50A. Its core functions include:
Ⓐ Overload protection
●The circuit breaker provides delayed interruption of overload current through a thermal-magnetic tripping mechanism.
●Short-circuit protection: Electromagnetic tripping mechanism for rapid disconnection of short-circuit current (action time ≤0.1s).
●RCD protection: detects leakage current (typically 30mA/100mA) to prevent electric shock accidents.
Ⓑ High Breaking Capacity – Available in two versions:
● 6kA (for standard applications)
● 10kA (for high-demand industrial/commercial environments)
Ⓒ processing property
●Supports frequent on/off operations, suitable for devices requiring manual switching (e.g., lighting circuits, socket circuits).
●Mechanical life ≥ 20000 cycles, electrical life ≥ 10000 cycles (at rated current)
Ⓓ Typical scenarios
●Residential power distribution: serves as the main switch or branch circuit protection for terminal distribution boxes.
●Industrial control: Protects power supply lines for small motors, control cabinets, and other equipment.
●Commercial facilities: Lighting and socket circuits for shopping malls, office buildings, etc.
Ⓔ Product complies with standard: IEC/EN 61009-1
●Technical Parameters
Product Model | GFB1L-50H |
Standard | IEC/EN 61009-1 |
No. of poles | 1P+N,1 Module, N line with disconnected |
Rated current (In) | 1A,2A,3A,4A,5A,6A,10A,16A,20A,25A,32A,40A,50A |
Rated sensitivity currents (IΔn) | 10mA, 30mA, 100mA, 300mA,500mA |
Rated short-circuit breaking capacity | 10kA |
Rated voltage (Ue) | 230/240V 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 |
Residual current type | B: residual AC, pulsating and smooth DC current, high frequency (≤1kHz) |
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 |
Protection Degree | IP20 |
Datum temperature | 30℃ |
Ambient air temperature | -35℃~+70℃ |
Terminal/Cable size | 16mm² |
Installation | Mounting on 35mm DIN rail |
Torque (N·m) | 1.5 |
Connection | Both ends can be used as input terminals |
●Product Types Choosing
| Rated Current | Rated Residual Operation Current(I△n) | Product Number | |
| Type B | Type C | ||
| 1A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB0110 GFB1L-50HB0230 | GFB1L-50HC0110 GFB1L-50HHC0130 |
| 2A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB0210 GFB1L-50HB0230 | GFB1L-50HC0210 GFB1L-50HHC0230 |
| 3A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB0310 GFB1L-50HB0330 | GFB1L-50HC0310 GFB1L-50HHC0330 |
| 4A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB0410 GFB1L-50HB0430 | GFB1L-50HC0410 GFB1L-50HHC0430 |
| 5A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB0510 GFB1L-50HB0530 | GFB1L-50HC0510 GFB1L-50HHC0530 |
| 6A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB0610 GFB1L-50HB0630 | GFB1L-50HC0610 GFB1L-50HHC0630 |
| 10A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB1010 GFB1L-50HB1030 | GFB1L-50HC1010 GFB1L-50HC1030 |
| 16A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB1610 GFB1L-50HB1630 | GFB1L-50HC1610 GFB1L-50HC1630 |
| 20A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB2010 GFB1L-50HB2030 | GFB1L-50HC2010 GFB1L-50HC2030 |
| 25A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB2510 GFB1L-50HB2530 | GFB1L-50HC2510 GFB1L-50HC2530 |
| 32A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB3210 GFB1L-50HB3230 | GFB1L-50HC3210 GFB1L-50HC3230 |
| 40A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB4010 GFB1L-50HB4030 | GFB1L-50HC4010 GFB1L-50HC4030 |
| 50A | 10mA、30mA、100mA、300mA、500mA | GFB1L-50HB5010 GFB1L-50HB5030 | GFB1L-50HC5010 GFB1L-50HC5030 |
●Connecting Line
Rated current In (A) | Nominal cross-sectional area S (mm²) of copper wire |
1、2、3、4、5、6、10、16、20、25、32 | 4 |
40、50 | 6 |
●Appearance and Installation Dimensions ●Characteristic Curves
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