www.littelfuse.com © 2012 Littelfuse • Transportation Products Catalog
MIDI® HEAVY DUTY BOLT-DOWN FUSE RATED 32V
Description
This MIDI® style fuse offers a bolt-on space saving fuse for high
current wiring protection and provides time delay characteristics
with “Diffusion Pill Technology”. The MIDI® was designed and
patented by Littelfuse.
Specifications
Voltage Rating: 32 VDC
Interrupting Ratings: 5000A @ 14 VDC
Operating Temperature Range: -40˚C to +125˚C
Housing: Transparent Nylon Composite
Terminal: Tin plated Copper
Mounting Torque M5: 4.5 Nm +/- 1Nm
Complies with: ISO 8820-5
UL 248 Special Purpose Fuses
Ordering Information
Part Number Package Size
0498xxx.MXT-HD 1000
0498xxx.UXT-HD 500
Ratings
Part Number Current Rating
(A)
Font Color Typical Voltage Drop Typical Cold
Resistance
I2t
(A2s)
0498030.MXT-HD 30 A 65 mV 2.06 mΩ 4200
0498040.MXT-HD 40 A 65 mV 1.398 mΩ 10000
0498050.MXT-HD 50 A 65 mV 1.025 mΩ 13000
0498060.MXT-HD 60 A 68 mV 0.865 mΩ 21700
0498070.MXT-HD 70 A 70 mV 0.72 mΩ 24000
0498080.MXT-HD 80 A 58 mV 0.541 mΩ 24600
0498100.MXT-HD 100 A 60 mV 0.457 mΩ 51300
0498125.MXT-HD 125 A 71 mV 0.394 mΩ 73200
0498150.MXT-HD1150 A 77 mV 0.323 mΩ 81900
0498175.MXT-HD1175 A 77 mV 0.285 mΩ 100000
0498200.MXT-HD1200 A 77 mV 0.261 mΩ 125000
Note 1: Short circuit protectors only.
Bolt-down Fuses
Time-Current Characteristics
% of Rating
Opening Time Min / Max (s)
30-125A 150-200A
75 – / – 360,000 s / –
100 360,000 s / – – / –
110 14,400 s / – – / –
150 90 s / 3,600 s – / –
200 3 s / 100 s 1 s / 15 s
300
350
0.3 s / 3 s
– / –
– / –
0.3 s / 5 s
500 0.1 s / 1 s 0.1 s / 1 s
www.littelfuse.com © 2012 Littelfuse • Transportation Products Catalog
MIDI® HEAVY DUTY BOLT-DOWN FUSE RATED 32V
Dimensions
Dimensions in mm
Temperature Rerating Curve
Time-Current Characteristic Curves
Part Number
Artikel-Nr.
“A”
mm (inch)
“B”
mm (inch)
“C”
mm (inch)
0498030.MXT-HD 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)
0498040.MXT-HD 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)
0498050.MXT-HD 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)
0498060.MXT-HD 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)
0498070.MXT-HD 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)
0498080.MXT-HD 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)
0498100.MXT-HD 0.63 (0.025) 4.3 (0.169) 8.3 (0.327)
0498125.MXT-HD 0.63 (0.025) 4.3 (0.169) 8.3 (0.327)
0498150.MXT-HD 0.63 (0.025) 4.3 (0.169) 8.3 (0.327)
0498175.MXT-HD 0.63 (0.025) 4.3 (0.169) 8.3 (0.327)
0498200.MXT-HD 0.63 (0.025) 4.3 (0.169) 8.3 (0.327)
MIDI Rerating Curve
85
90
95
100
105
110
115
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120
Ambient Temperature (C)
Rerating Factor (% Rated Current)
30A
40A
50A
60A
70A
80A
100A
125A
150A
200A
175A
1000
100
10
1
0.1
0.01
10000100010010
TIME IN SECONDS
Bolt-down Fuses
