Residual-current Operated Circuit Breaker-FTB2LE


It is mainly used for overload, short circuit protection in AC 50Hz, Rated operating voltage 230/400V, rated current 63A and below distribution line, and It can also be used for conversion of infrequent operation between lines under normal conditions. The breaking ability can reach 6.5kA.

Technical data

Product illustration

Tripping characteristic

Exterior and dimensions

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Model & Spec FTB2LE
Technical parameters
Standards GB/T16917.1/IEC62423 GB/T22794/IEC62423
Certifications CCC (RoHS is customizable)
Pole number 1P+N, 2P, 3P, 3P+N, 4P
Rated current(A) Type C 6, 10, 16, 20, 25, 32, 40, 50, 63
Type D 6, 10, 16, 20, 25, 32, 40
Rated frequency(Hz) 50
Residual current characteristics (action type) AC A B
Rated residual operating current lΔn (mA) 30, 50, 100, 200, 300 30, 50 30, 50, 100, 200, 300,500
Actuation time (ms) <100
Electrical characteristics
Rated operating voltage Ue(V) AC230 (1P+N, 2P)  AC400 (3P, 3P+N, 4P)
Rated short-circuit breaking capacity lcn(kA) 6.5
Rated impulse withstand voltage Uimp(kV) 4
Dielectric voltage, power frequency, 1min(kV) 2
Rated residual making capacity lΔm (kA) 4.5
Impact resistance (waveform 8/20) (kA) 3
Isolation function Yes
Class of pollution 2
Use cat. (overvoltage category) ll
Tripping type and characteristics C-type curve (5ln~10ln)  D-type curve (10ln~20ln)
Mechanical charateristics
Contact status indicator Green: open  Red: close
Mechanical life (times) 20000
Electerical life (times) 10000
IP rate IP40 (installed inside the distribution box)
Mechanical shock resistance (GB/T2423.5)(m/s²) 150, continuously 11ms half-wave
Anti-vibration (GB/T2423.10) 5g-20 cycles, frequency 5…150…5Hz (load 0.5ln)
Anti-humid heat (GB/T2423.4)(℃/RH) 28 cycles (with 55/95…100)
Reference ambient temperature (℃) 30
Operating ambient temperature (℃) -5~+40
Storage temperature (℃) -40~+70
Installation characteristics
Terminal type U-shaped terminal, tunnel type
Max. wiring capacity Conductor connection 25 mm², busbar inlet thickness 0.8-2 mm
Max. ultimate torque (N.m) 5.1 (≤25A)  5.6 (>25A)
Tool Pozi drive (double cross)
Installation Installation on standard DIN rail (35mm)
Inlet method Upper/lower
Outline dim. (mm)
1P+N 90*54*74.2
2P 90*72*75.7
3P 90*100*75.7
3P+N 90*112.5*75.7
4P 90*130.5*75.7



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