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 Voltage Rating: 32 VDC Interrupting Rating: 2000A 32 VDC MEGA Fuses Recommended Environmental Temperature: -40C to + 125C Terminals Materials: Copper (Silver plated copper available) Housing Material: PPA-GF33HS (U.L. 94 Flammability rating - HB) Clear Top Housing Material: PES (top) (U.L. 94 Flammability rating - V0) PPA-GF33HS (bottom) (U.L. 94 Flammability rating - HB) Mounting Torque M6: 8-14 Nm Mounting Torque M8: 12-18 Nm MEGA Clear Top Housing Fuse Complies with: ISO 8820-5 Ordering Information Time-Current Characteristics Time-Current Characteristic Curves Opening Time Min / Max (s) Package Bolt Bolt Hole % of Part Number Rating Plating TIME-CURRENT CHARACTERISTIC CURVES (RECORDED 23 C) Size Size Qty Rating 40-250 300-500 10000 0298xxx.ZXEH 80 - 250 500 None M8 2 75 / 14,400 / 0298xxx.ZXH 300 - 500 500 None M8 2 100 14,400 / / 1000 0298xxx.UX1M8 80 - 500 500 None M8 1 135 120 / 1800 / 0298xxx.ZXB 40 - 250 500 Ag M8 2 200 1 / 15 1 / 15 100 0298xxx.ZXA 80 - 500 500 None M6 2 350 0.3 / 5 0.5 / 5 MEGA Clear Top Housing Material Fuse 600 0.1 / 1 0.1 / 1 10 0298xxx.UXT 40 - 250 500 None M8 2 Ratings 1 3 2 Part Number Current Color Code Test Cable Size Typ. Voltage Typ. Cold Typ. I t 2 2 Rating (A) (mm ) Drop (mV) Resistance (m) (A s) 0.1 1 0298040. 40 4 132 2.51 8,700 1 0298060. 60 6 119 1.50 21,000 0.01 0298080. 80 10 87 0.72 21,500 10 100 1000 10000 CURRENT A 0298100. 100 16 87 0.56 31,100 0298125. 125 16 80 0.42 57,800 10000 0298150. 150 25 92 0.35 100,000 0298175. 175 25 86 0.29 168,000 1000 0298200. 200 35 83 0.26 204,000 0298225. 225 35 82 0.22 257,000 0298250. 250 50 82 0.20 389,000 100 2 4 0298300. 300 70 74 0.17 315,000 2 4 0298350. 350 70 68 0.14 500,000 10 2 4 0298400. 400 70 64 0.13 610,000 2 4 0298450. 450 70 60 0.11 1,050,000 2 4 0298500. 500 70 58 0.09 2,050,000 1 1: Not mentioned in ISO standards 2: Short Circuit Protector only 3: 0298xxx.ZXB has white font color on all ratings. 0.1 100 1000 10000 4: Voltage Drop measurements for short circuit protectors taken at 75% of rated current. CURRENT A 2 The typical I t is an average value calculated from the breaking capacity tests by using the melting time before the arcing occurs. REV07272021 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 33 TIME s TIME s 350A 400A 60A 450A 80A 500A 100A 125A 150A 175A 200A 225A 250A 300AHigh Current Fuses MEGA Fuse Rated 32V Dimensions Dimensions in mm for reference only. See outline drawing for dimensions and tolerances. ZX & UXT Versions UX1M8 Version 68.6 50.8 29.2 (25.4) M6: 6.6 M8: 8.6 XXXA 9.9 (40A-250A) 10.7 (300A-500A) 1.02 (40A-250A) 1.8 (300A-500A) Typical Derating Temperature Table Temperature Security Margin is 20% max. allowed current load A at ambient temperature Please contact Littelfuse for Details Regarding Derating Test Set-Up. -20C 0C 20C 65C 85C 95C 105C 125C 40A 35 33 31 26 23 22 20 17 Max Recommended 60A 48 46 43 36 32 30 28 23 Environmental 80A 81 76 72 61 55 52 49 41 Temperature 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 Derating curves may change depending on the final condition of the application (terminals characteristics, wire size etc..). 500A 378 358 337 284 257 242 227 191 Please ask Littelfuse for more information. REV07272021 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 34 19.0 16.3 XXXAMP