SEMI CONDUCTOR FUSE BS

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British Style BS 88
240V 6-900A
Electrical CharacteristicsOrdering InformationDimensions
TypeRated Current RMS-AmpsI2t (A2S)Watts LossPart NumberCarton Qty.Carton Weight (kg)Figure Number
Pre-ArcClearing At 120VClearing At 240V
LCT 6 2 6 9 1.0 6LCT 20 0.110 Fig. 1
LCT 10 3.8 12 22 2.5 10LCT 20 0.110 Fig. 1
LCT 12 7 22 32 2.5 12LCT 20 0.110 Fig. 1
LCT 16 20 50 100 2.5 16LCT 20 0.110 Fig. 1
LCT 20 25 80 160 4.0 20LCT 20 0.110 Fig. 1
                   
LET 25 18 120 250 4.0 25LET 10 0.310 Fig. 2
LET 32 32 200 450 5.0 32LET 10 0.310 Fig. 2
LET 35 50 320 600 5.0 35LET 10 0.310 Fig. 2
LET 50 100 500 1400 7.0 50LET 10 0.310 Fig. 2
LET 63 180 1100 2200 9.0 63LET 10 0.310 Fig. 2
LET 80 300 1900 3800 10.0 80LET 10 0.310 Fig. 2
LET 100 600 3800 7500 10.0 100LET 10 0.310 Fig. 2
LET 125 600 3800 7500 16.0 125LET 10 0.310 Fig. 2
LET 160 1100 7000 16000 20.0 160LET 10 0.310 Fig. 2
LET 180 1600 12000 29000 21.0 180LET 10 0.310 Fig. 2
                   
LMT 160 1100 7000 16000 17.0 160LMT 1 0.180 Fig. 3
LMT 200 1500 10000 20000 28.0 200LMT 1 0.180 Fig. 3
LMT 250 3200 20000 40000 28.0 250LMT 1 0.180 Fig. 3
LMT 315 6000 35000 75000 35.0 315LMT 1 0.180 Fig. 3
LMT 355 8000 50000 100000 35.0 355LMT 1 0.180 Fig. 3
LMT 400 14000 70000 160000 40.0 400LMT 1 0.180 Fig. 3
LMT 450 18000 100000 220000 42.0 450LMT 1 0.180 Fig. 3
                   
LMMT 400 6000 35000 80000 60.0 400LMMT 1 0.370 Fig. 4
LMMT 500 14000 80000 170000 64.0 500LMMT 1 0.370 Fig. 4
LMMT 630 24000 150000 300000 75.0 630LMMT 1 0.370 Fig. 4
LMMT 710 32000 200000 460000 77.0 710LMMT 1 0.370 Fig. 4
LMMT 800 52000 300000 600000 82.0 800LMMT 1 0.370 Fig. 4
LMMT 900 75000 400000 800000 97.0 900LMMT 1 0.370 Fig. 4
1 kg = 2.2 lbs     1 lb = 0.45 kg
• Interrupting rating 200kA RMS Symmetrical.  • 150 Vdc rating 
• Watts loss provided at rated current.
• Note: 7LET, 10LET, 12LET and 16LET are available for replacement purposes on existing equipment.
• All fuses above have been tested at 318 Vac.
• See accessories on page 72.

Dimensions 

Electrical Characteristic
Total Clearing I2t
The total clearing I2t at rated voltage and
at power factor of 15% are given in the
electrical characteristics. For other volt-
ages,the clearing I2t is found by multi-
plyingby correction factor, K, given as
a function of applied working voltage,
Eg, (RMS).
Arc Voltage
This curve gives the peak arc voltage,
UL, which may appear across the fuse
during its operation as a function of the
applied working voltage, Eg, (RMS) at a 
power factor of 15%.
Power Losses
Watts 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, Ib, in % of the rated current.