littelfuse.com
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for
surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse
product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages
arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless
otherwise agreed by Littelfuse.
High Current Fuses
Specifications
Interrupting Rating: 2000A @ 32 VDC
Voltage Rating: 32 VDC
Operating Temperature Range: -40˚C to + 125˚C
Housing Material: PPA-GF33HS
Flammability (UL 94): HB
Clear Top Housing Material: PES (top) PPA-GF33HS (bottom)
Terminals: Copper (Silver plated copper available)
M6 or M8 bolts available
Mounting Torque: 8-14 Nm M6
12-18 Nm M8
Complies with: ISO 8820-5
Ordering Information
Part Number Rating Package
Size Plating Bolt
Size
Bolt Hole
Qty
0298xxx.ZXEH 80 - 250 500 None M8 2
0298xxx.ZXH 300 - 500 500 None M8 2
0298xxx.UX1M8 80 - 500 500 None M8 1
0298xxx.ZXB 40 - 250 500 Ag M8 2
0298xxx.ZXA 80 - 500 500 None M6 2
MEGA Clear Top Housing Material Fuse
0298xxx.UXT 40 - 250 500 None M8 2
Time-Current Characteristics
% of
Rating
Opening Time Min / Max (s)
40-250 300-500
75 – / – 14,400 s / –
100 14,400 s / – – / –
135 120 s / 1800 s – / –
200 1 s / 15 s 1 s / 15 s
350 0.300 s / 5 s 0.500 s / 5 s
600 0.100 s / 1 s 0.100 s / 1 s
MEGA® Clear Top Housing Fuse
MEGA® and MEGA® Clear Top Fuse Rated 32V
The MEGA® Fuse is designed for high current circuit protection up to 500A with “Diffusion
Pill Technology.” The MEGA® Fuse also provides time delay characteristics. Designed
and patented by Littelfuse, the MEGA® Fuse is ideal for battery and alternator protection
application and other heavy gauge cables requiring ultra-high current protection.
MEGA® Fuses
Note 1: Not mentioned in ISO standards Note 2: Short Circuit Protector only
* 0298xxx.ZXB has white font color on all ratings.
** Voltage Drop measurements for short circuit protectors taken at 75% of rated current.
Ratings
Part Number Current Rating
(A)
Font Color* Typ. Voltage Drop
(mV)
Cold Resistance
(mΩ)
Wire
(mm2)
I2t
(A2s)
0298040._140 – 132 2.510 4 8700
0298060._160 – 119 1.504 6 21000
0298080._ 80 87 0.720 10 21500
0298100._ 100 87 0.562 16 31100
0298125._ 125 80 0.423 16 57800
0298150._ 150 92 0.352 25 100000
0298175._ 175 86 0.294 25 168000
0298200._ 200 83 0.257 35 204000
0298225._ 225 82 0.222 35 257000
0298250._ 250 82 0.201 50 389000
0298300._2300 74 ** 0.167 70 315000
0298350._2350 68 ** 0.138 70 500000
0298400._2400 64 ** 0.126 70 610000
0298450._2450 60 ** 0.112 70 1050000
0298500._2500 58 ** 0.092 70 2050000
Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for
surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse
product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages
arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless
otherwise agreed by Littelfuse. littelfuse.com
22
Time-Current Characteristic Curves
1.83 (.072 ) 300-500A
300-500A
9.9 (.39")
M6: 6.60 (.26")
M8: 8.64 (.34")
29.2 (1.15")
10.72 (.422")
40-250A
40-250A
Typical Derating
High Current Fuses
MEGA® Fuse Rated 32V
Dimensions
Dimensions in mm
max. allowed current load [A] at ambient temperature
-20°C 0°C 20°C 65°C 85°C 95°C 105°C 125°C
40A 35 33 31 26 23 22 20 17
60A 48 46 43 36 32 30 28 23
80A 81 76 72 61 55 52 49 41
100A 101 95 90 76 69 65 61 51
125A 129 123 116 98 88 83 78 66
150A 149 141 133 112 102 96 90 76
175A 164 156 147 124 112 106 99 84
200A 184 175 165 139 126 119 112 94
225A 194 184 174 147 134 127 119 101
250A 230 218 205 173 157 147 138 116
300A 272 258 242 204 184 174 162 136
350A 311 294 277 232 209 197 184 154
400A 317 300 283 239 216 204 191 161
450A 337 320 302 256 232 219 206 175
500A 378 358 337 284 257 242 227 191
Temperature Security Margin is 20%
Wire Cross Sections And Test Fixture acc. ISO 8820-5
