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.
| 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 | |||||||
