High-breaking Miniature Circuit Breaker-FTB3

Überblick:


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.


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Model & Spec FTB3
Technical parameters
Standards GB/T10963.1/IEC60898
Certifications CCC CB
Pole number 1P, 2P, 3P, 4P
Bemessungsstrom (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 Ja
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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