7-18-01 SB01191
Form No.
Page 1 of 2
BIF Doc #720004
Bussmann®
®
British Style BS 88
240V 6-900A
Electrical Characteristics Ordering Information Dimensions Curves
Rated I2t (A2S) Carton
Current Clearing Clearing Watts Part Carton Weight Figure
Type RMS-Amps Pre-arc at 120V at 240V Loss Number Qty. (kg) Number BIF #
6 2 6 9 1.0 6LCT
10 3.8 12 22 2.5 10LCT
LCT 12 7 22 32 2.5 12LCT 20 0.110 Fig. 1
16 20 50 100 2.5 16LCT 35785296
20 25 80 160 4.0 20LCT
25 18 120 250 4.0 25LET
32 32 200 450 5.0 32LET
35 50 320 600 5.0 35LET
50 100 500 1400 7.0 50LET
LET 63 180 1100 2200 9.0 63LET
80 300 1900 3800 10.0 80LET 10 0.310 Fig. 2 35785293
100 600 3800 7500 10.0 100LET
125 600 3800 7500 16.0 125LET
160 1100 7000 16000 20.0 160LET
180 1600 12000 29000 21.0 180LETa
160 1100 7000 16000 17.0 160LMT
200 1500 10000 20000 28.0 200LMT
250 3200 20000 40000 28.0 250LMT
LMT 315 6000 35000 75000 35.0 315LMT 1 0.180 Fig. 3
355 8000 50000 100000 35.0 355LMT 35785294
400 14000 70000 160000 40.0 400LMT
450 18000 100000 220000 42.0 450LMT
400 6000 35000 80000 60.0 400LMMT
500 14000 80000 170000 64.0 500LMMT
630 24000 150000 300000 75.0 630LMMT
LMMT 710 32000 200000 460000 77.0 710LMMT 1 0.370 Fig. 4 35785295
800 52000 300000 600000 82.0 800LMMT
900 75000 400000 800000 97.0 900LMMT
nInterrupting rating 200kA RMS Symmetrical. n150 Vdc rating 1 kg = 2.2 l bs 1 lb = 0.45 kg
nWatts loss provided at rated current .
nNote: 7LET, 10LET, 12LET and 16LET are available for replacement purposes on existing equipment.
nAll fuses above have been tested at 318 Vac.
nSee accessories on page 72.
5641.8
26.2
17.7
19.1
12.7
7.1
9.7
Fig. 1: LCT Fig. 2: LET
473828
6.4
8.4
8.7
4
5.5
Dimensions
Dimensions in mm.
1mm = 0.0394∑ 1∑ = 25.4mm
7-18-01 SB01191
Form No.
Page 2 of 2
BIF Doc #720004
Bussmann®
British Style BS 88
240V 6-900A ®
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-
plying by 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 .
Electrical Characteristics
Dimensions
845931
83
38
25.4
13.5
10.3
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
10050 150 200 250
1)
2) Eg
K
750
500
250
100 200 300
1)
2)
Eg
UL
Kp
1.0
0.8
0.4
0.5
0.6
0.3
0.2
0.130 40 50 60 70 80 90 100%
Ib
845931
41
38.1
25.4
10.3
13.5
Fig. 3: LMT Fig. 4: LMMT
Indicator (Optional)
Dimensions in mm.
1mm = 0.0394∑ 1∑ = 25.4mm
1) LCT
2) LET, LMT, LMMT 1) LCT
2) LET, LMT, LMMT
The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled.
This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right,
without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without
notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
