Direct-current Miniature Circuit Breaker for PV System-FTBD-PV


It is suitable for protecting the photovoltaic module in the solar photovoltaic power generation system from the damage caused by fault current which is under the rated current 63A and below rated DC voltage 1200V and below.

Technical data

Product illustration

Tripping characteristic

Exterior and dimensions

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Technical Data

Model & Spec FTBD-PV
Technical parameters
Standards GB/T14048.2/IEC60947-2
Certifications CCC  CE
Pole number 1P, 2P, 3P, 4P
Rated current(A) 6, 10, 16, 20, 25, 32, 40, 50, 63
Electrical characteristics
Rated operating voltage Ue(V) DC300 (1P),  DC600 (2P),  DC900 (3P),  DC1200 (4P)
Rated insulation voltage Ui(V) DC1200
Rated impulse withstand voltage Uimp(kV) 4
Rated short-circuit capacity lcn(kA) 10(1P, 2P)  7.5(3P, 4P)
Dielectric voltage, power frequency, 1min(kV) 2
Isolation function Yes
Class of pollution 2
Use cat. (overvoltage category) II
Thermomagnetic Tripping characteristics 1.05ln/1.3ln (long delay setting current multiple), 8ln~12ln (short-circuit protection characteristics)
Mechanical charateristics
Contact status indicator Green: open  Red: close
Mechanical life (times) 20000
Electrical 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 0.8-2mm
Max. ultimate torque (N.m) 5.1 (≤25A)  5.6 (>25A)
Tool Pozi drive (double cross)
Installation Installed on standard DIN rail (35mm)
Inlet method Pay attention to the polarity
Outline dim. (mm)
1P 80*18*74.2
2P 80*36*75.7
3P 80*54*75.7
4P 80*72*75.7

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