High Current Fuses 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. 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) MEGA® Fuses M6 or M8 bolts available Mounting Torque: 8-14 Nm M6 12-18 Nm M8 Complies with: ISO 8820-5 Ordering Information Time-Current Characteristics Part Number Rating Package Plating Bolt Bolt Hole % of Opening Time Min / Max (s) Size Size Qty Rating 40-250 300-500 0298xxx.ZXEH 80 - 250 500 None M8 2 75 – / – 14,400 s / – 0298xxx.ZXH 300 - 500 500 None M8 2 100 14,400 s / – – / – 0298xxx.UX1M8 80 - 500 500 None M8 1 MEGA® Clear Top Housing Fuse 135 120 s / 1800 s – / – 0298xxx.ZXB 40 - 250 500 Ag M8 2 200 1 s / 15 s 1 s / 15 s 0298xxx.ZXA 80 - 500 500 None M6 2 350 0.300 s / 5 s 0.500 s / 5 s MEGA Clear Top Housing Material Fuse 600 0.100 s / 1 s 0.100 s / 1 s 0298xxx.UXT 40 - 250 500 None M8 2 Ratings Part Number Current Rating Font Color* Typ. Voltage Drop Cold Resistance Wire I2t (A) (mV) (mΩ) (mm2) (A2s) 0298040._1 40 – 132 2.510 4 8700 0298060._1 60 – 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._2 300 74 ** 0.167 70 315000 0298350._2 350 68 ** 0.138 70 500000 0298400._2 400 64 ** 0.126 70 610000 0298450._2 450 60 ** 0.112 70 1050000 0298500._2 500 58 ** 0.092 70 2050000 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. 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 21

High Current Fuses MEGA® Fuse Rated 32V Time-Current Characteristic Curves Dimensions Dimensions in mm M6: 6.60 (.26") M8: 8.64 (.34") 29.2 (1.15") 40-250A 9.9 (.39") 40-250A 10.72 (.422")300-500A 1.83 (.072 ) 300-500A Typical Derating Temperature Security Margin is 20% Wire Cross Sections And Test Fixture acc. ISO 8820-5 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 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