High Speed Fuse - BS 88
British Style - 240V
All Bussmann British style fuses are tested to IEC 60269 Part 4.
This standard requires a test voltage which is 5% higher than the
rated voltage. In the North America fuses are required to clear
only their rated voltage.
LCT, LET, LMT & LMMT
Voltage Rating:
240Vac/150Vdc
Current Rating:
6 - 900 Amps
Interrupting
Rating:
200kA RMS Symmetrical
Agency Information
Designed & Tested to BS88: Part 4, IEC 60269 Part 4
UL Recognized, Std. 248-13,
Watt loss provided at rated current
Electrical Characteristics
Rated Current
RMS-Amps
6
10
12
16
20
25
32
35
50
63
80
100
125
160
180
160
200
250
315
355
400
450
400
500
630
710
800
900
Pre-arc
I
2
t (A
2
SEC)
Clearing
at 120V
6
12
22
50
80
120
200
320
500
1100
1900
3800
3800
7000
12000
7000
10000
20000
35000
50000
70000
100000
35000
80000
150000
200000
300000
400000
Clearing
at 240V
9
22
32
100
160
250
450
600
1400
2200
3800
7500
7500
16000
29000
16000
20000
40000
75000
100000
160000
220000
80000
170000
300000
460000
600000
800000
Watts
Loss
1.0
2.5
2.5
2.5
4.0
4.0
5.0
5.0
7.0
9.0
10.0
10.0
16.0
20.0
21.0
17.0
28.0
28.0
35.0
35.0
40.0
42.0
60.0
64.0
75.0
77.0
82.0
97.0
Part Number
Carton Qty.
Carton Weight
Figure
Size
LCT
LET
LMT
LMMT
2
3.8
7
20
25
18
32
50
100
180
300
600
600
1100
1600
1100
1500
3200
6000
8000
14000
18000
6000
14000
24000
32000
52000
75000
6LCT
10LCT
12LCT
16LCT
20LCT
25LET
32LET
35LET
50LET
63LET
80LET
100LET
125LET
160LET
180LET
160LMT
200LMT
250LMT
315LMT
355LMT
400LMT
450LMT
400LMMT
500LMMT
630LMMT
710LMMT
800LMMT
900LMMT
20
20
20
20
20
10
10
10
10
10
10
10
10
10
10
1
1
1
1
1
1
1
1
1
1
1
1
1
0.110
0.110
0.110
0.110
0.110
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.180
0.180
0.180
0.180
0.180
0.180
0.180
0.370
0.370
0.370
0.370
0.370
0.370
Fig 1
Fig 2
Fig 3
Fig 4
Note: 7LET, 10LET, 12LET and 16LET are available for replacement purposes on existing equipment (not UL recognized) till stocks last
BIF Document : 720004
CE logo denotes compliance with European Union Low Voltage
Directive (50-1000V AC, 75-1500V DC). Refer to BIF document #8002.
1
For product data sheets, visit www.cooperbussmann.com/1/technicalinformation.html
High Speed Fuse - BS 88
British Style - 690V
CT, ET, FE, EET, FEE, FM, FMM,
MT†, MMT†
Voltage Rating:
690Vac/500Vdc
Current Rating:
6 - 710 Amps
Interrupting
Rating:
200kA RMS Symmetrical
Agency Information
Designed & Tested to BS88: Part 4, IEC 60269 Part 4
UL Recognized, Std. 248-13,
Watt loss provided at rated current
MT, MMT and additional ratings of ET and EET are available for replacement
purposes on existing equipment and are BS 88: Part 4 approved
Electrical Characteristics
Rated Current
RMS-Amps
6
10
12
16
20
25
32
35
40
45
56
63
80
35
40
45
50
63
71
80
90
100
90
110
140
160
100
120
140
160
180
200
180
200
225
250
280
315
350
400
450
500
550
630
700
160
180
200
250
280
315
355
180
200
225
280
315
355
400
450
500
560
630
710
Pre-arc
1.8
7
10
16
32
25
32
52
103
103
135
171
360
33
52
76
103
135
210
250
360
470
490
600
1050
1500
400
540
850
1000
1400
1900
1400
2600
3700
5200
7000
10000
15000
10000
15000
20000
30000
45000
60000
2400
3800
6000
11500
16500
19000
22000
1650
2200
3700
6600
8600
13500
21000
30000
42000
60000
68500
78000
I
2
t (A
2
SEC)
Clearing
at 415V
8.5
30
40
66
150
150
190
310
600
680
950
1200
2500
130
180
270
380
480
600
900
1300
1800
3000
4000
7000
10000
1600
1900
2500
3700
5300
7100
7500
10500
14500
20500
30500
40000
60000
40000
60000
82000
120000
180000
245000
15000
25000
40000
80000
100000
125000
160000
12000
16000
26000
47000
62000
97000
150000
220000
300000
430000
500000
600000
Clearing
at 660V
12
48
65
110
220
250
350
500
900
1100
1500
2000
4000
200
300
450
600
750
950
1500
2100
2800
4500
6500
12000
17000
2400
3100
3800
5700
8400
11400
13500
18500
26500
37500
55000
77000
105000
72500
105000
150000
215000
310000
420000
25000
38000
58000
110000
150000
180000
200000
18000
23000
40000
70000
91000
140000
220000
320000
450000
640000
720000
850000
Watts
Loss
2
3
3
7
7
7
11
11
9
11
14
16
18
9
9
11
11
12
17
20
20
23
19
27
35
39
24
32
36
46
46
52
40
40
44
48
48
55
55
85
90
100
100
100
120
26
26
27
32
35
42
51
42
42
42
47
51
54
60
57
64
64
86
105
Part Number
6CT
10CT
12CT
16CT
20CT
25ET
32ET
35ET
40ET
45ET
56ET
63ET
80ET
35FE
40FE
45FE
50FE
63FE
71FE
80FE
90FE
100FE
90EET
110EET
140EET
160EET
100FEE
120FEE
140FEE
160FEE
180FEE
200FEE
180FM
200FM
225FM
250FM
280FM
315FM
350FM
400FMM
450FMM
500FMM
550FMM
630FMM
700FMM
160MT
180MT
200MT
250MT
280MT
315MT
355MT
180MMT
200MMT
225MMT
280MMT
315MMT
355MMT
400MMT
450MMT
500MMT
560MMT
630MMT
710MMT
Carton Qty.
20
20
20
20
20
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
5
5
5
5
5
5
5
5
5
5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Carton Weight
0.16
0.160
0.160
0.160
0.160
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.450
0.450
0.450
0.450
0.450
0.450
0.450
0.450
0.450
0.450
0.240
0.240
0.240
0.240
0.240
0.240
0.240
0.450
0.450
0.450
0.450
0.450
0.450
0.260
0.260
0.260
0.260
0.260
0.260
0.260
.0470
.0470
.0470
.0470
.0470
.0470
.0470
.0470
.0470
.0470
.0470
.0470
Figure
Size
CT
Fig 5
ET
Fig 6
FE
Fig 6
EET
Fig 7
FEE
Fig 7
FM
Fig 8
FMM
Fig 9
MT†
Fig 8
MMT†
Fig 9
CE logo denotes compliance with European Union Low Voltage
Directive (50-1000V AC, 75-1500V DC). Refer to BIF document #8002.
Note: 8ET, 12ET, 15ET, 20ET, 65EET and 75EET are available for replacement purposes on existing equip-
ment (not UL recognized) till stocks last
† 350V DC (IEC) rating. No UL Recognition.
BIF Document : 720024
For product data sheets, visit www.cooperbussmann.com/1/technicalinformation.html
2
High Speed Fuse - Accessories
Trip-indicator fuselinks are available for use in parallel
with the main fuselinks. They can either be attached to
the associated fuselink or mounted separately in panel mounted
fuse clips, Part No. CL1. A push-on adaptor
and microswitch attachment is available for use with the
trip indicator to give the facility of remote indication,
reference MAI or MBI.
Fuse ratings of 20A and below cannot usually accommodate a
trip fuselink in parallel.
Trip-indicator Fuselink Data
Type
Dim. ‘A’
Max.
Voltage
Rating
Type
Dim. ‘A’
Max.
Voltage
Rating
TI250
TI500
TI600
TI700
37.6
47.5
55.7
61.8
250
500
600
700
TI1100
TI1500
TI2000
TI2500
98.4
120.8
147.5
198.3
1100
1500
2000
2500
A
6
21
0.8
6.35
Microswitch and Adaptor Type MAI
Current Rating:
AC 50/60Hz resistive load @ 250 VRMS
AC 50/60Hz resistive load @ 127 VRMS
DC, resistive load @ 110 Vdc
DC, resistive load @ 30 Vdc
Maximum Working Voltage:
Contact-to-contact (RMS)
Contact-to-contact (RMS)
4A
6A
0.7
2
1000V
1500V
6
Dimensions in mm.
1mm = 0.0394”
1” = 25.4mm
2.4
5.2
3.6
5.2
Where trip indicator fuselinks are to be attached to the main
fuselink, an accessory pack comprising a pair of mounting clips
and an appropriate trip indicator fuselink will be required.
The ordering code references for these packs are listed below:
9.5
NO
44 36
44 36
3.6
NC NC
21
NO
21
Fuse Type
ET
EET
FE
FEE
LET
Order Ref.
EC-600
EC-600
EC-600
EC-600
EC-250
Fuse Type
FM
FMM
LMT
LMMT
Order Ref.
MC-600
MC-600
MC-250
MC-250
Stud Fuseblocks
Part No.
Stud Height
Stud Dia & Threads
C5268-1
C5268-2
C5268-3
C5268-4
C5268-5
1.00”
1.75”
0.75”
1.00”
1.75”
Universal Fuseblocks
Modular
Base
1BS101
1BS102
1BS103
1BS104
Max.
Voltage
600V
600V
600V
600V
Max. Fuse
Current Rating
100A
400A
400A
600A
BIF
Document
1206
1207
1208
1209
3
For product data sheets, visit www.cooperbussmann.com/1/technicalinformation.html
High Speed Fuse - Dimensions
British Style - 240 Volts
Fig 1
Fig 2
Fig 3
Fig 4
British Style - 690 Volts
Fig 5
Fig 6
Fig 7
Fig 8
Dim. ‘A’ FM
Electrical Characteristics
Total Clearing I2t
The total clearing I2t at rated voltage and at power
factor of 15% are given in the electrical characteris-
tics. For other voltages, the electrical I2t is found by
multiplying by correction factor K, given as a func-
tion of applied working voltage Eg (RMS).
Curves below : 1) - LCT
2) - LET, LMT & LMMT
80 - 85
Fig 9
MT
85
MMT/FMM 85
Arc Voltage
This curve gives the peak arc voltage UL, which may
appear across the fuse during its operation as func-
tion 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 lb, in % of the
rated current.
Curves below : 1) - LCT
2) - LET, LMT & LMMT
Curves below : 1) - CT
2) - ET, EET, FE, FEE, MT, MMT, FM & FMM
Curves below : 1) - CT
2) - ET, EET, FE, FEE, MT, MMT, FM & FMM
For product data sheets, visit www.cooperbussmann.com/1/technicalinformation.html
4
