{"id":16428,"date":"2026-10-29T11:32:59","date_gmt":"2026-10-29T11:32:59","guid":{"rendered":"https:\/\/essfuse.com\/?post_type=product&p=16428"},"modified":"2026-10-29T11:32:59","modified_gmt":"2026-10-29T11:32:59","slug":"h14fd-h14ff-14x51-semiconductor-fast-acting-fuse","status":"publish","type":"product","link":"https:\/\/essfuse.com\/fr\/product\/h14fd-h14ff-14x51-semiconductor-fast-acting-fuse\/","title":{"rendered":"H14FD\u2011H14FF 14X51 Semiconductor Fuse | 1A\u201163A Fast\u2011Acting aR Fuse"},"content":{"rendered":"

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H14FD\u2011H14FF 14X51 Semiconductor Fuse<\/strong> is cylindrical fast\u2011acting aR\u2011category fuse\u2011link designed for semiconductor device short\u2011circuit and overload protection. This 14\u00d751mm series covers current ratings from 1A to 63A, rated for 690V AC(IEC),700V AC(UL) and 600V DC, delivering high interrupting performance of 100kA for AC circuits and 50kA for DC circuits. It adopts variable\u2011cross\u2011section melt made of 99.99% pure silver, encapsulated inside high\u2011strength ceramic body filled with high\u2011purity quartz\u2011sand arc\u2011quenching medium. Widely used for small\u2011size inverters, UPS power systems and variable\u2011speed drive equipment. Custom parameters can be developed for special project requirements.<\/p>\n

<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Series Model<\/strong><\/td>\nH14FD \/ H14FF 14X51 Semiconductor Fast\u2011Acting Fuse<\/td>\n<\/tr>\n
Utilization Category<\/strong><\/td>\naR (Semiconductor protection fuse\u2011link)<\/td>\n<\/tr>\n
Dimension Size<\/strong><\/td>\n14\u00d751\u202fmm cylindrical ferrule\u2011type<\/td>\n<\/tr>\n
Rated Voltage<\/strong><\/td>\n690V AC(IEC),700V AC(UL); 600V DC<\/td>\n<\/tr>\n
Rated Current Range<\/strong><\/td>\n1A\u201163A<\/td>\n<\/tr>\n
Interrupting Capacity<\/strong><\/td>\n100\u202fkA (AC), 50\u202fkA (DC)<\/td>\n<\/tr>\n
Internal Construction<\/strong><\/td>\n99.99% pure\u2011silver variable\u2011section melt, high\u2011strength ceramic tube, quartz\u2011sand arc\u2011extinguishing medium<\/td>\n<\/tr>\n
Compliance Standards<\/strong><\/td>\nGB13539\u20114, IEC60269\u20114, UL248\u20111 \/ UL248\u201113<\/td>\n<\/tr>\n
Operating Ambient Temperature<\/strong><\/td>\n\u201140\u202f\u00b0C ~ +125\u202f\u00b0C<\/td>\n<\/tr>\n
Installation Altitude<\/strong><\/td>\n\u22642000\u202fm; special design available for altitude above 2000\u202fm<\/td>\n<\/tr>\n
Typical Applications<\/strong><\/td>\nSmall\u2011power inverter, UPS power supply, variable\u2011speed drive, semiconductor equipment over\u2011current & short\u2011circuit protection<\/td>\n<\/tr>\n
Customization Support<\/strong><\/td>\nCustom design & specifications available upon customer requirement<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Part Number<\/th>\nRated Current(A)<\/th>\nPre\u2011arcing I\u00b2t(A\u00b2s)<\/th>\nClearing I\u00b2t(A\u00b2s)<\/th>\nPower Loss(W)<\/th>\nRated Voltage(V)<\/th>\n<\/tr>\n<\/thead>\n
H14FD01 \/ H14FF01<\/td>\n1<\/td>\n0.2<\/td>\n0.3<\/td>\n1.15<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD02 \/ H14FF02<\/td>\n2<\/td>\n0.9<\/td>\n1.8<\/td>\n1.75<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD04 \/ H14FF04<\/td>\n4<\/td>\n6.7<\/td>\n13<\/td>\n2.90<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD06 \/ H14FF06<\/td>\n6<\/td>\n8.0<\/td>\n35<\/td>\n2.00<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD08 \/ H14FF08<\/td>\n8<\/td>\n4.3<\/td>\n40<\/td>\n2.25<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD10 \/ H14FF10<\/td>\n10<\/td>\n4.3<\/td>\n45<\/td>\n2.95<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD12 \/ H14FF12<\/td>\n12<\/td>\n5.4<\/td>\n60<\/td>\n4.10<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD16 \/ H14FF16<\/td>\n16<\/td>\n13.1<\/td>\n125<\/td>\n4.65<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD20 \/ H14FF20<\/td>\n20<\/td>\n26.8<\/td>\n230<\/td>\n4.80<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD25 \/ H14FF25<\/td>\n25<\/td>\n52.5<\/td>\n385<\/td>\n5.95<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD32 \/ H14FF32<\/td>\n32<\/td>\n96.7<\/td>\n700<\/td>\n6.90<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD40 \/ H14FF40<\/td>\n40<\/td>\n210<\/td>\n1050<\/td>\n7.80<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD50 \/ H14FF50<\/td>\n50<\/td>\n200<\/td>\n1800<\/td>\n9.00<\/td>\n690V\/700V<\/td>\n<\/tr>\n
H14FD63 \/ H14FF63<\/td>\n63<\/td>\n617<\/td>\n2900<\/td>\n12.50<\/td>\n690V\/700V<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Frequently Asked Questions<\/h3>\n
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Q: What protection category is H14FD\u2011H14FF 14X51 fuse?<\/div>\n
A: H14FD\u2011H14FF belongs to utilization category aR, specially designed for fast short\u2011circuit protection of semiconductor power components such as thyristors and diodes.<\/div>\n<\/div>\n
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Q: What breaking capacity does H14FD\u2011H14FF provide?<\/div>\n
A: AC interrupting capacity reaches 100kA, DC interrupting capacity is 50kA, delivers reliable current\u2011limiting performance for power electronic circuits.<\/div>\n<\/div>\n
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Q: What are the main applications for 14\u00d751\u202fmm H14FD\u2011H14FF fuse\u2011link?<\/div>\n
A: Mainly applied for small\u2011power inverters, UPS power supplies, variable\u2011frequency drives and other power\u2011electronic equipment for overload and short\u2011circuit protection.<\/div>\n<\/div>\n
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Q: Can H14FD\u2011H14FF work for installation altitude higher than 2000\u202fm?<\/div>\n
A: Standard product is suitable for altitude \u22642000\u202fm. For installation above 2000\u202fm, please contact us for customized development.<\/div>\n<\/div>\n
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Q: What standards does this 14X51 semiconductor fuse comply with?<\/div>\n
A: Compliant with GB13539\u20114, IEC60269\u20114, UL248\u20111 and UL248\u201113 standards for semiconductor fuses.<\/div>\n<\/div>\n<\/div>\n


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