High-breaking Miniature Circuit Breaker-FTB3

Overview:


A breaking capacity of 12kA up to 32A and 10kA between 40 to 63A.

Current-limiting scheme: in the event of a short circuit, are able to limit the let-through current to 60%-70% of the rated current. The trip mechanism ensures perfect closure every time,thereby considerably improving the performance of these devices and extending their average lifetime.


Technical data

Product illustration

Tripping characteristic

Exterior and dimensions

Related video

Model & Spec FTB3
Technical parameters
Standards GB/T10963.1/IEC60898
Certifications CCC CB
Pole number 1P, 2P, 3P, 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
Electrical characteristics
Rated operating voltage Ue(V) AC230 (1P)  AC400 (2P, 3P, 4P)
Rated short-circuit breaking capacity lcn(kA) 10 (40A-63A)  12(6A-32A)
Rated impulse withstand voltage Uimp(kV) 4
Dielectric voltage, power frequency, 1min(kV) 2
Isolation function Yes
Class of pollution 2
Use cat. (overvoltage category) II
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 0.8ln)
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 or lower
Outline dim. (mm)
(L*W*H)
1P 80*18*74.2
2P 80*36*75.7
3P 80*54*75.7
4P 80*72*75.7

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