{"id":4140,"date":"2025-10-21T17:04:00","date_gmt":"2025-10-21T17:04:00","guid":{"rendered":"https:\/\/1clickrepair.in\/ESS\/?post_type=product&p=4140"},"modified":"2026-10-29T12:40:35","modified_gmt":"2026-10-29T12:40:35","slug":"7h38l-high-speed-dc-automotive-fuse-300a-400a-750v-800v","status":"publish","type":"product","link":"https:\/\/essfuse.com\/it\/prodotto\/7h38l-high-speed-dc-automotive-fuse-300a-400a-750v-800v\/","title":{"rendered":"7H38L high\u2011speed dc automotive fuse | 300A\u2011400A 750V\u2011800V DC gR Fuse"},"content":{"rendered":"

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7H38L high\u2011speed dc automotive fuse<\/strong> is gR full\u2011range fast\u2011acting high\u2011voltage DC fuse for new\u2011energy charging pile,charger,on\u2011board battery,vehicle\u2011mounted circuit system and inverter comprehensive over\u2011current & short\u2011circuit protection. This series covers rated current 300A\u2011400A at 750V \/ 800V DC with 20kA DC breaking capacity. It adopts high\u2011temperature\u2011resistant ceramic tube,99.99% pure\u2011silver variable\u2011cross\u2011section melt and high\u2011purity quartz\u2011sand arc\u2011extinguishing medium. Silver\u2011plated contact surfaces reduce temperature rise and power consumption. The unit withstands thermal shock,mechanical vibration shock,current impulse and chemical load. Custom time\u2011current performance characteristics are negotiable for special\u2011project demands.<\/p>\n

<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Series Model<\/strong><\/td>\n7H38L High\u2011Speed DC Automotive Fuse<\/td>\n<\/tr>\n
Fuse Category<\/strong><\/td>\ngR Full\u2011range fast\u2011acting fuse<\/td>\n<\/tr>\n
Rated DC Voltage<\/strong><\/td>\n750V \/ 800V DC<\/td>\n<\/tr>\n
Rated Current Range<\/strong><\/td>\n300A\u2011400A<\/td>\n<\/tr>\n
Interrupting Breaking Capacity DC<\/strong><\/td>\n20\u202fkA DC<\/td>\n<\/tr>\n
Material & Structure<\/strong><\/td>\nHigh\u2011temp ceramic housing;99.99% pure\u2011silver variable\u2011section melt;quartz\u2011sand arc\u2011extinguishing medium;silver\u2011plated contact surface<\/td>\n<\/tr>\n
Compliance Standards<\/strong><\/td>\nISO8820\u20118, JASO D622, GB\/T31465.6, UL248\u201120<\/td>\n<\/tr>\n
Normal Operating Temp<\/strong><\/td>\n\u20115\u202f\u00b0C ~ +40\u202f\u00b0C<\/td>\n<\/tr>\n
Allowable Extreme Temp<\/strong><\/td>\n\u201140\u202f\u00b0C ~ +125\u202f\u00b0C<\/td>\n<\/tr>\n
Typical Applications<\/strong><\/td>\nCharging pile,charger,on\u2011board battery,vehicle\u2011mounted circuit,inverter new\u2011energy\u2011vehicle high\u2011voltage DC\u2011circuit comprehensive protection<\/td>\n<\/tr>\n
Customization Support<\/strong><\/td>\nCustom agreed time\u2011current characteristics available upon negotiation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/p>\n\n\n\n\n\n\n\n
Part Number<\/th>\nRated Current(A)<\/th>\nRated DC Voltage(V)<\/th>\nMax Voltage Drop(mV)<\/th>\nDC Breaking Capacity(kA)<\/th>\n<\/tr>\n<\/thead>\n
7H38L300<\/td>\n300<\/td>\n750\/800<\/td>\n45<\/td>\n20<\/td>\n<\/tr>\n
7H38L350<\/td>\n350<\/td>\n750\/800<\/td>\n42<\/td>\n20<\/td>\n<\/tr>\n
7H38L400<\/td>\n400<\/td>\n750\/800<\/td>\n42<\/td>\n20<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Frequently Asked Questions<\/h3>\n
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Q: What fuse category is 7H38L high\u2011speed dc automotive fuse?<\/div>\n
A: 7H38L is gR full\u2011range fast\u2011acting fuse, provides both overload and short\u2011circuit high\u2011voltage DC protection for charging pile and new\u2011energy\u2011vehicle circuits.<\/div>\n<\/div>\n
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Q: What is DC breaking\u2011capacity for 7H38L series?<\/div>\n
A: Rated DC interrupting capacity reaches 20kA for short\u2011circuit fault interruption for charging\u2011pile,EV battery and inverter high\u2011voltage DC\u2011systems.<\/div>\n<\/div>\n
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Q: Where are 7H38L fuses applied?<\/div>\n
A: Designed for charging pile,charger,on\u2011board battery,vehicle\u2011mounted wiring circuit and inverter comprehensive high\u2011voltage DC\u2011circuit protection of new\u2011energy vehicles.<\/div>\n<\/div>\n
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Q: What temperature range can 7H38L withstand?<\/div>\n
A: Normal ambient\u20115\u202f\u00b0C ~ +40\u202f\u00b0C; allowable extreme operating temperature\u201140\u202f\u00b0C ~ +125\u202f\u00b0C for harsh charging\u2011pile and automotive environment.<\/div>\n<\/div>\n
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Q: Can we customize time\u2011current curve of 7H38L fuse?<\/div>\n
A: Yes,custom\u2011made agreed time\u2011current performance can be negotiated for special\u2011purpose project requirements.<\/div>\n<\/div>\n<\/div>\n

7H38L-Fast-acting-fuse<\/a>
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