British standard fast-acting blow fuse，6A-450A ,250V ac/150V dc .aR
Materials:
Contacts :Tin plated copper
Terminals:Tin plated brass
Body:Ceramic
Fuse element : Pure silver
Filler:Pure silicon sand
Basic parameters
| Part no. | Rated voltage | Rated current | Rated breaking capability |
| XTRFB10 | 250Vac 150Vdc | 6A,10A,12A,16A,20A | 10OKA(250Vac) 20KA(150Vdc) |
| XTRFB18 | 25A,32A,35A,504,634,80A,100A,125A,160A,180A | ||
| XTRFB38 | 12160A,200A,250A,315A,355A,400A,450A |
Product number | Rated current(A) | lt (As) | Power loss(w) | ||
| t Pre-arcing lt | 120Vt | 250V Pt | |||
| XTRFB10 | 6 | 2 | 6 | g | 1 |
| 10 | 3.8 | 12 | 22 | 2.5 | |
| 12 | 7 | 22 | 32 | 2.5 | |
| 16 | 20 | 50 | 100 | 2.5 | |
| 20 | 25 | 8o | 160 | 4 | |
| XTRFB18 | 25 | 18 | 120 | 250 | 4 |
| 32 | 32 | 200 | 450 | 5 | |
| 35 | 5o | 320 | 60o | 5 | |
| 5o | 100 | 5o0 | 1400 | 7 | |
| 63 | 180 | 1100 | 2200 | g | |
| 8o | 3oo | 190o | 38oo | 10 | |
| 100 | 600 | 3800 | 7500 | 10 | |
| 125 | 600 | 380o | 7500 | 16 | |
| 160 | 1100 | 7000 | 1600o | 20 | |
| 180 | 1600 | 12000 | 2900o | 21 | |
| XTRFB38 | 160 | 1100 | 7000 | 1600o | 17 |
| 20o | 1500 | 10o00 | 20ooo | 28 | |
| 250 | 3200 | 20000 | 40000 | 28 | |
| 315 | 60oo | 3500o | 75000 | 35 | |
| 355 | 80oo | 5000o | 100ooo | 35 | |
| 400 | 14000 | 7000o | 160000 | 40 | |
| 450 | 18000 | 10o0oo | 22000o | 42 | |
Power loss at rated current is given in the electrical characteristics.The curve allows the calculation of the power losses at load currents lower than the rated current.The correction factor,Kp,is given as a function of the RMS load current，lb,in % of the rated current