Class L Fuses

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BUSSMANN -

Limitron KLU Class L Time Delay Fuses, 600VAC

StyleModelAmpsFuse LengthSpeed TypeFuse Dia.SpeedInterrupt RatingBody StyleClassPrice
AKLU-15001.5 kA10 3/4"--Time Delay200 kA at 600V ACBolt OnL€1,039.82
BKLU-18001.8 kA10 3/4"--Time Delay200 kA at 600V ACBolt OnL€2,604.52
CKLU-601601A8 5/8"Fast Acting2 1/2"Time Delay200 kA at 600V ACBolt OnL€889.09
CKLU-650650A8 5/8"Fast Acting2 1/2"Time Delay200 kA at 600V ACBolt OnL€2,323.25
CKLU-700700A8 5/8"Fast Acting2 1/2"Time Delay200 kA at 600V ACBolt OnL€2,459.31
CKLU-800800A8 5/8"Fast Acting-Time Delay200 kA at 600V ACBolt OnL€901.54
DKLU-10001000A10 3/4"Fast Acting2 1/2"Time Delay200 kA at 600V ACBolt OnL€964.08
DKLU-12001200A10 3/4"Fast Acting2 1/2"Time Delay200 kA at 600V ACBolt OnL€901.54
EKLU-16001600A10 3/4"Fast Acting3"Time Delay200 kA at 600V ACBolt OnL€1,185.59
EKLU-20002000A10 3/4"Fast Acting3 1/2"Time Delay200 kA at 600V ACBolt OnL€1,256.29
FKLU-25002500A10 3/4"Fast Acting5"Time Delay200 kA at 600V ACBolt OnL€1,701.51
GKLU-30003000A10 3/4"Time Delay5"Time Delay200 kA at 600V ACBolt OnL€1,916.77
GKLU-40004000A10 3/4"Fast Acting5 3/4"Time Delay200 kA at 600V ACBolt OnL€8,756.66
BUSSMANN -

Limitron KTU Class L Fast-Acting Fuses, 600VAC

StyleModelAmpsBody StyleInterrupt RatingFuse TypeFuse LengthBody MaterialFuse Dia.SpeedPrice
AKTU-11001.1 kACartridge Blade-Fast Blow----€1,862.80
BKTU-14001.4 kACartridge Blade-Fast Blow----€2,509.51
BKTU-15001.5 kACartridge Blade200 kAFast Blow10 3/4"---€1,404.96
CKTU-18001.8 kACartridge Blade200 kAFast Blow10 3/4"---€2,835.68
DKTU-13501.35 kACartridge Blade200 kAFast Blow----€1,878.58
EKTU-20012.001 kACartridge Blade-Fast Blow----€4,556.85
FKTU-24002.4 kACartridge Blade-Fast Blow----€3,190.12
EKTU-25002.5 kACartridge Blade200 kAFast Blow10 3/4"---€1,557.89
GKTU-30003 kACartridge Blade200 kAFast Blow10 3/4"---€3,677.49
GKTU-35003.5 kACartridge Blade200 kAFast Blow----€5,760.00
GKTU-40004 kACartridge Blade200 kAFast Blow----€4,973.88
DKTU-50005 kACartridge Blade200 kAFast Blow----€6,076.30
GKTU-60006 kACartridge Blade200 kAFast Blow10 3/4"---€8,800.35
HKTU-200200ACartridge Blade-Fast Blow----€1,418.93
HKTU-400400ACartridge Blade200 kAFast Blow----€1,403.25
HKTU-450450ACartridge Blade-Fast Blow----€1,342.46
HKTU-500500ACartridge Blade-Fast Blow----€3,412.56
HKTU-600600ACartridge Blade200 kAFast Blow----€1,117.86
IKTU-601601ABolt On200 kA at 600V AC-8 5/8"Fiberglass, Melamine2 1/2"Fast Acting€1,256.29
HKTU-650650ACartridge Blade200 kAFast Blow8.63"---€1,660.21
HKTU-700700ACartridge Blade200 kAFast Blow8.63"---€1,403.25
HKTU-750750ACartridge Blade-Fast Blow----€1,862.80
JKTU-800800ABolt On200 kA at 600V AC-8 5/8"Fiberglass, Melamine2.437"Fast Acting€1,117.86
AKTU-801801ACartridge Blade-Fast Blow----€1,862.80
AKTU-850850ACartridge Blade-Fast Blow----€1,862.80
BUSSMANN -

Low-Peak KRP-C Class L Time-Delay Fuses, 600VAC/300VDC

StyleModelAmpsBody StyleFuse LengthFits Fuse Block StyleFuse Dia.Fuse TypeSpeedBody MaterialPrice
AKRP-C-1100SP1.1 kABolt On-Nonrejection-Slow Blow, Time DelayTime DelayFiberglass, Melamine€2,460.04
BKRP-C-2001SP2.001 kABolt On-Nonrejection-Slow BlowTime DelayFiberglass, Melamine€6,329.73
BKRP-C-2400SP2.4 kACartridge Blade---Slow Blow--€4,433.04
CKRP-C-3200SP3.2 kACartridge Blade10 3/4"--Slow Blow--€2,631.95
DKRP-C-4500SP4.5 kACartridge Blade10 3/4"--Slow Blow--€3,326.76
DKRP-C-5000SP5 kABolt On10 3/4"Nonrejection-Slow BlowTime DelayFiberglass, Melamine€8,643.31
EKRP-C-6000SP6 kACartridge Blade10 3/4"--Slow Blow, Time Delay--€6,599.84
FKRP-C-601SP601ABolt On8.63"Nonrejection2 1/2"-Time DelayFiberglass, Melamine€1,224.45
GKRP-C-650SP650A-8.63"-2 1/2"---€1,256.29
GKRP-C-700SP700ABolt On8 5/8"Nonrejection2 1/2"-Time DelayFiberglass, Melamine€1,182.87
HKRP-C-750SP750ABolt On-Nonrejection-Slow Blow, Time DelayTime DelayFiberglass, Melamine€2,940.89
IKRP-C-800SP800ABolt On8 5/8"Nonrejection--Time DelayFiberglass, Melamine€1,182.87
FKRP-C-801SP801ABolt On10 3/4"Non Rejection2.406"-Time DelayFiberglass, Melamine€2,714.58
GKRP-C-900SP900ABolt On10 3/4"Nonrejection2 1/2"-Time DelayFiberglass, Melamine€1,354.64
GKRP-C-1000SP1000ABolt On10 3/4"Nonrejection2 1/2"-Time DelayFiberglass, Melamine€1,117.86
GKRP-C-1200SP1200ABolt On10 3/4"Nonrejection--Time DelayFiberglass, Melamine€1,117.86
JKRP-C-1350SP1350ABolt On10 3/4"Nonrejection-Slow Blow, Time DelayTime DelayFiberglass, Melamine€2,901.68
GKRP-C-1400SP1400ABolt On10 3/4"Nonrejection3"-Time DelayFiberglass, Melamine€1,765.89
GKRP-C-1500SP1500ABolt On10 3/4"Nonrejection3"-Time DelayFiberglass, Melamine€1,630.10
GKRP-C-1600SP1600ABolt On10 3/4"Nonrejection3"-Time DelayFiberglass, Melamine€1,451.16
FKRP-C-1800SP1800ABolt On10 3/4"Nonrejection3 1/2"-Time DelayFiberglass, Melamine€1,630.10
GKRP-C-2000SP2000ABolt On10 3/4"Nonrejection3 1/2"-Time DelayFiberglass, Melamine€1,705.84
FKRP-C-2500SP2500ABolt On10 3/4"Nonrejection5"-Time DelayFiberglass, Melamine€1,856.80
KKRP-C-3000SP3000ABolt On10 3/4"Nonrejection5"-Time DelayFiberglass, Melamine€2,109.04
GKRP-C-3500SP3500ABolt On10 3/4"Nonrejection5 3/4"-Time DelayFiberglass, Melamine€2,267.65
BUSSMANN -

KRP-CL Class L Time-Delay Fuses, 600VAC

StyleModelAmpsBody StyleFuse TypeSpeedMounting StyleTermination TypeIndicator StyleAc VoltagePrice
AKRP-CL-225225ACartridge BladeSlow Blow, Time Delay-HolderKnife BladeWithout Indicator600V AC€2,392.85
BKRP-CL-250250ABolt On-Time Delay----€4,334.53
AKRP-CL-300300ACartridge BladeSlow Blow-HolderKnife BladeWithout Indicator600V AC€2,392.85
AKRP-CL-400400ACartridge BladeSlow Blow, Time Delay-HolderKnife BladeWithout Indicator600V AC€1,256.29
AKRP-CL-600600ACartridge BladeSlow Blow-HolderKnife BladeWithout Indicator600V AC-
RFQ
StyleModelAmpsInterrupt RatingSpeedBody StyleClassVisual IndicationPrice
AKLPC200.X200A200 kA at 600V ACTime DelayBolt InLNon Indicating€855.36
AKLPC250.X250A300 kA @ 600V ACTime DelayBolt InLNon Indicating€855.36
AKLPC300.X300A200 kA at 600V ACTime DelayBolt InLNon Indicating€855.36
AKLPC350.X350A---L-€855.36
AKLPC400.X400A200 kA at 600V ACTime DelayBolt InLNon Indicating€855.36
AKLPC450.X450A200 kA at 600V ACTime DelayBolt InLNon Indicating€920.81
AKLPC500.X500A200 kA at 600V ACTime DelayBolt InLNon Indicating€920.81
AKLPC600.X600A200 kA at 600V ACTime DelayBolt InLNon Indicating€855.36
AKLPC601.X601A200 kA at 600V ACTime DelayBolt InLNon Indicating€863.77
AKLPC650.X650A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,037.35
AKLPC700.X700A---L-€863.77
AKLPC750.X750A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,037.35
AKLPC800.X800A200 kA at 600V ACTime DelayBolt InLNon Indicating€823.02
AKLPC900.X900A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,042.54
AKLPC1000X1000A---L-€860.42
AKLPC1100X1100A200 kA at 600V ACTime DelayBolt InLNon Indicating€952.87
AKLPC1200X1200A200 kA at 600V ACTime DelayBolt InLNon Indicating€924.55
AKLPC1300X1300A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,203.57
AKLPC1350X1350A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,414.12
AKLPC1400X1400A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,352.61
AKLPC1500X1500A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,352.61
AKLPC1600X1600A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,100.61
AKLPC1800X1800A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,784.90
AKLPC1900X1900A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,900.67
AKLPC2000X2000A200 kA at 600V ACTime DelayBolt InLNon Indicating€1,543.38
StyleModelAmpsSpeedInterrupt RatingBody StyleClassVisual IndicationPrice
AKLLU601.X601ATime Delay200 kA at 600V ACBolt InLNon Indicating€784.35
AKLLU650.X650ATime Delay200 kA at 600V ACBolt InLNon Indicating€783.85
AKLLU700.X700ATime Delay200 kA at 600V ACBolt InLNon Indicating€750.25
AKLLU750.X750ATime Delay200 kA at 600V ACBolt InLNon Indicating€895.27
AKLLU800.X800ATime Delay200 kA at 600V ACBolt InLNon Indicating€741.98
AKLLU900.X900ATime Delay200 kA at 600V ACBolt InLNon Indicating€894.44
AKLLU1000X1000ATime Delay200 kA at 600V ACBolt InLNon Indicating€743.82
AKLLU1200X1200ATime Delay200 kA at 600V ACBolt InLNon Indicating€822.46
AKLLU1350X1350ATime Delay200 kA at 600V ACBolt InLNon Indicating€1,094.42
AKLLU1400X1400ATime Delay200 kA at 600V ACBolt InLNon Indicating€1,061.51
AKLLU1500X1500ATime Delay200 kA at 600V ACBolt InLNon Indicating€919.12
AKLLU1600X1600ATime Delay200 kA at 600V ACBolt InLNon Indicating€892.32
AKLLU1800X1800ATime Delay200 kA at 600V ACBolt InLNon Indicating€1,201.20
AKLLU2000X2000ATime Delay200 kA at 600V ACBolt InLNon Indicating€1,077.61
AKLLU2500X2500ATime Delay200 kA at 600V ACBolt InLNon Indicating€2,576.56
AKLLU3000X3000ATime Delay200 kA at 600V ACBolt InLNon Indicating€2,687.85
AKLLU3500X3500ATime Delay200 kA at 600V ACBolt InLNon Indicating€3,800.45
AKLLU4000X4000ATime Delay200 kA at 600V ACBolt InLNon Indicating€4,160.55
MERSEN FERRAZ -

A4BY Series Time-Delay Fuses, Class L

StyleModelAmpsBody MaterialFuse Dia.Fuse LengthSpeedBody StyleMountingSpeed TypePrice
AA4BY200200AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€1,432.92
BA4BY250250AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€1,388.02
CA4BY250-TI250AGmg2"8.63"--BoltedTime Delay€2,104.25
DA4BY300300AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€1,432.92
CA4BY300-TI300AGmg2"8.63"--BoltedTime Delay€2,204.45
EA4BY350350AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€1,146.09
FA4BY400400AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€840.33
GA4BY450450AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€1,307.59
HA4BY500500AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€894.86
CA4BY600-TI600AGmg2"8.63"--BoltedTime Delay€2,124.23
IA4BY600600AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€894.86
JA4BY601601AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€894.86
KA4BY650650AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€1,871.96
LA4BY700700AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€900.31
CA4BY700-TI700AGmg2"8.63"--BoltedTime Delay€2,124.23
MA4BY750750AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€1,529.10
NA4BY800800AGlass, Melamine2"8.63"Time DelayBladeBoltedTime Delay€925.63
CA4BY800-TA800AGmg2"8.63"--BoltedTime Delay€1,240.78
CA4BY800-TI800AGmg2"8.63"--BoltedTime Delay€2,017.13
OA4BY801801AGlass, Melamine2 1/2"10 3/4"Time DelayBladeBoltedTime Delay€1,253.74
PA4BY900900AGlass, Melamine2 1/2"10 3/4"Time DelayBladeBoltedTime Delay€1,253.74
QA4BY10001000AGlass, Melamine2 1/2"10 3/4"Time DelayBladeBoltedTime Delay€925.63
CA4BY1000-TI1000AGmg2 1/2"10 3/4"--BoltedTime Delay€2,017.13
RA4BY11001100AGlass, Melamine2 1/2"10 3/4"Time DelayBladeBoltedTime Delay€1,613.73
SA4BY12001200AGlass, Melamine2 1/2"10 3/4"Time DelayBladeBoltedTime Delay€864.09
MERSEN FERRAZ -

A4BT Series Fuses, Class L, Time-Delay

StyleModelAmpsFuse Dia.Fuse LengthBody MaterialMountingSpeed TypeMounting TypeAc VoltagePrice
AA4BT200200A2"8.63"GmgBoltedTime DelayBolt600V AC€1,560.71
BA4BT250250A2"8.63"GmgBoltedTime DelayBolt600V AC€1,560.71
CA4BT300300A2"8.63"GmgBoltedTime DelayBolt600V AC€1,560.71
DA4BT350350A2"8.63"GmgBoltedTime DelayBolt600V AC€1,560.71
EA4BT400400A2"8.63"GmgBoltedTime DelayBolt600V AC€1,560.71
FA4BT450450A2"8.63"GmgBoltedTime DelayBolt600V AC€1,560.71
GA4BT500500A2"8.63"GmgBoltedTime DelayBolt600V AC€1,560.71
HA4BT600600A2"8.63"GmgBoltedTime DelayBolt600V AC€1,560.71
IA4BT601601A3"8.63"GmgBoltedTime DelayBolt600V AC€1,105.40
JA4BT650650A3"8.63"GmgBoltedTime DelayBolt600V AC€1,866.71
KA4BT700700A3"8.63"GmgBoltedTime DelayBolt600V AC€1,105.40
LA4BT750750A3"8.63"GmgBoltedTime DelayBolt600V AC€1,873.35
MA4BT800800A3"8.63"GmgBoltedTime DelayBolt600V AC€1,073.72
NA4BT800-TA800A3"8.63"GmgBoltedTime DelayBolt600V AC€1,835.54
OA4BT900900A2 1/2"10 3/4"GmgBoltedTime DelayBolt600V AC€1,873.35
PA4BT10001000A2 1/2"10 3/4"GmgBoltedTime DelayBolt600V AC€937.10
QA4BT1000-TA1000A2 1/2"10 3/4"GmgBoltedTime DelayBolt600V AC€2,043.03
RA4BT11001100A2 1/2"10 3/4"GmgBoltedTime DelayBolt600V AC€1,768.22
SA4BT12001200A2 1/2"10 3/4"GmgBoltedTime DelayBolt600V AC€937.10
TA4BT14001400A3"10 3/4"GmgBoltedTime DelayBolt600V AC€1,073.72
QA4BT1400-TA1400A3"10 3/4"GmgBoltedTime DelayBolt600V AC€1,379.63
UA4BT15001500A3"10 3/4"GmgBoltedTime DelayBolt600V AC€2,002.84
VA4BT16001600A3"10 3/4"GmgBoltedTime DelayBolt600V AC€1,105.40
WA4BT18001800A3 1/2"10 3/4"GmgBoltedTime DelayBolt600V AC€1,105.40
XA4BT20002000A3 1/2"10 3/4"GmgBoltedTime DelayBolt600V AC€1,202.42
MERSEN FERRAZ -

A4BQ Series Time-Delay Fuses, Class L

StyleModelAmpsBody MaterialFuse Dia.Fuse LengthSpeedBody StyleMountingSpeed TypePrice
AA4BQ100-TA100AGmg2"8.63"--BoltedTime Delay€2,061.72
BA4BQ100100AMelamine2"8.63"Time DelayBladeBoltedTime Delay€927.45
CA4BQ150-TA150AGmg2"8.63"--BoltedTime Delay€2,061.72
DA4BQ150150AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,559.66
EA4BQ200200AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,559.66
FA4BQ200-TA200AGmg2"8.63"--BoltedTime Delay€2,061.72
GA4BQ250250AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,559.66
HA4BQ250-TA250AGmg2"8.63"--BoltedTime Delay€2,061.72
IA4BQ300-TA300AGmg2"8.63"--BoltedTime Delay€2,061.72
JA4BQ300300AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,597.36
KA4BQ350350AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,559.66
LA4BQ350-TA350AGmg2"8.63"--BoltedTime Delay€2,061.72
MA4BQ400400AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,347.37
NA4BQ400-TA400AGmg2"8.63"--BoltedTime Delay€2,061.72
OA4BQ450-TA450AGmg2"8.63"--BoltedTime Delay€2,061.74
PA4BQ450450AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,559.66
QA4BQ500500AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,498.68
RA4BQ500-TA500AGmg2"8.63"--BoltedTime Delay€2,061.72
SA4BQ600600AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,347.37
TA4BQ600-TA600AGmg2"8.63"--BoltedTime Delay€2,061.72
UA4BQ601-TA601AGmg2"8.63"--BoltedTime Delay€1,575.98
VA4BQ601601AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,347.37
WA4BQ650650AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,895.35
XA4BQ650-TA650AGmg2"8.63"--BoltedTime Delay€2,464.69
YA4BQ700700AMelamine2"8.63"Time DelayBladeBoltedTime Delay€1,498.68
BUSSMANN -

Electronic Fuses

StyleModelAmpsBody StyleInterrupt RatingAc VoltageFuse TypeTermination TypeTypeMounting TypePrice
AKTK-R-5BC5ACartridge-600V ACFast BlowClip-Holder€31.13
BKWS-R-55ACartridge Blade-600V ACFast BlowKnife Blade-Holder€55.12
CC10G66ACartridge32A500V ACSlow Blow, Time DelayClip-Holder€34.55
DMIJ-1515A--250V AC---Holder€24.31
EBBS-2525ACartridge10 kA48V ACFast BlowClipFibre Ferrule FuseHolder€16.45
FKTS-B-3030ACartridge-600V ACFast BlowClipFast Acting FuseHolder€80.61
GC10G3232ACartridge32A400V ACSlow Blow, Time DelayClipFuse LinkHolder€1.26
HKWS-R-500500ACartridge Blade-600V ACFast BlowKnife Blade-Holder€1,187.41
LITTELFUSE -

Time Delay Fuse, 601 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-601EC2UDE€1,104.57
LITTELFUSE -

Time Delay Fuse, 1200 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-1200EC2UCU€1,006.11
RFQ
LITTELFUSE -

Time Delay Fuse, 700 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-700EC2UDH€995.93
RFQ
LITTELFUSE -

Time Delay Fuse, 650 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-650EC2UDG€1,092.59
RFQ
LITTELFUSE -

Time Delay Fuse, 2000 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-2000EC2UCZ€1,655.48
RFQ
LITTELFUSE -

Time Delay Fuse, 1800 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-1800EC2UCY€1,904.04
RFQ
LITTELFUSE -

Time Delay Fuse, 1600 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-1600EC2UCX€1,578.12
RFQ
LITTELFUSE -

Time Delay Fuse, 1500 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-1500EC2UCW€1,578.12
RFQ
LITTELFUSE -

Time Delay Fuse, 1000 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-1000EC2UCT€1,006.11
RFQ
LITTELFUSE -

Time Delay Fuse, 2500 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-2500EC2UDA-
RFQ
LITTELFUSE -

Time Delay Fuse, 1350 A, 600 V, Class L

ModelItemPrice (ex. VAT)
KLPC-1350EC2UCV-
RFQ
12

Class L Fuses

Class-L fuses are primarily designed for protection of high capacity systems (mains and large feeders) from short circuit and overload conditions and interrupt a current supply of up to 300kA. Raptor Supplies offers a wide range of these fuses from brands like Bussmann and Ferraz Shawmut featuring O-ring seals for providing maximum pressure during current limiting mechanism . BussmannClass L fuses feature a high-grade silica sand filler for accelerating the fuse response to current surges by producing an arc-quenching effect for increased mechanical strength. These current-limiting fuses produce a time-delay of 4 seconds (minimum) at 500 per cent rated current for close sizing; thus preventing the contacts to open until the temporary current inrush passes. The 600 VAC fuses are not interchangeable with other UL Class fuses and feature bolt-on mounting facility for ensuring proper seating to maintain the contact within the circuit. Ferraz ShawmutClass L Fuses protect feeder circuits and circuit breakers at a continuous current rating ranging from 200 to 6000A. These UL-listed and CSA-certified slow blow fuses, when correctly coordinated, provide a superior level of protection to downstream circuit components preventing nuisance blowout.