Description:
Fast-acting, bolt-mount fuse.

Ratings:
Volts: 600Vac (or less)
Amps: 601-6000A
IR: 200kA RMS Sym.

Agency Information: CE, Std. 248-10, Class L, UL Listed, Guide JDDZ, File E4273 CSA Certified, Class 1422-02, File 53787.

General Information:
• Fast-acting, short-circuit protection. Particularly suited for protection of circuit breakers with lower interrupting ratings and non-inductive loads such as lighting and heating circuits.
• 99.9% pure silver-links provide low watt loss and low operating temperature on normal current levels; minmizes total clearing I2t fault energy let-through.
• High grade silica-sand filler accelerates response of fuse to short-circuits by having a quenching effect upon the fuse arc.
• O-ring seals maximize pressure build-up during currentlimiting actions and ensure filler retention.
• Silver-plated micro-peened terminals provide high electrical conductivity, minimize heat generation, and keep fuses and switches cool.
• UL interrupting rating of 200,000 amperes.
• Selective coordination (blackout prevention).
• Glass melamine tube.
• Silver-plated end bells.
• No fuse reducers available.

Features and Benefits
• 200kA interrupting rating provides high ratings at all circuit locations.
• Economical solutions for high-fault circuits.
• Quality construction using high-grade materials provides lower watts loss and operating temperatures with superior arc quenching during current-limiting action.

Typical Applications
• Large Distribution Switchboards
• Power Panelboards

For superior electrical protection, Cooper Bussmann recommends upgrading KTU fuse applications to Low-Peak KRP-C fuses

Dimensional Data*All other tolerances (±0.02)


Ampere Ratings (600 VAC)†

Catalog Number	Ctn. Qty.	Weight*
		Lbs.	Kg.
KTU-601	1	3.75	1.7
KTU-650
KTU-700
KTU-750
KTU-800
KTU-850		4.25	1.927
KTU-900
KTU-1000
KTU-1200
KTU-1350		6	2.721
KTU-1400
KTU-1500
KTU-1600
KTU-1800		8.5	3.855
KTU-2000
KTU-2001		17	7.711
KTU-2500
KTU-3000		17.25	7.824
KTU-3500		24	10.886
KTU-4000
KTU-4500		31	14.061
KTU-5000
KTU-6000		34	15.422

†601-3000A is rated 340 VDC and 50 KAIC.
*Weight per carton.

Current-Limitation Curves

Time-Current Characteristic Curves–Average Melt


Fuseblocks (601 - 1200A):
Catalog Number        Poles
51215                              1
51235                              3