Fusetron
®
Dual-Element, Time-Delay Fuses
Class RK5 –– 600 Volt
Dimensions - in
A
FRS-R
65-600A
B
Amp Ratings
65-100
110-200
225-400
450-600
A
7.88 (± 0.062)
9.63 (± 0.062)
11.63 (± 0.094)
13.38 (± 0.094)
1.11
1.61
2.34
2.88
B
(± 0.020)
(± 0.020)
(± 0.020)
(± 0.020)
Catalog Symbol:
FRS-R
Current-Limiting, dual-element, time-delay – 10 seconds
(minimum) at 500% rated current
Ratings:
Volts – 600Vac (or less)
Amps – 65-600A
†
IR – 200kA RMS Sym.
– 20kA @300Vdc
Agency Information:
CE, UL Listed, Std. 248-12, Class RK5, Guide JDDZ, File
E4273 CSA Certified, C22.2 No. 248.12, Class 1422-01,
File 53787
Catalog Numbers
FRS-R-65
FRS-R-70
FRS-R-75
FRS-R-80
FRS-R-90
FRS-R-100
FRS-R-110
FRS-R-125
FRS-R-150
FRS-R-175
FRS-R-200
FRS-R-225
FRS-R-250
FRS-R-300
FRS-R-350
FRS-R-400
FRS-R-450
FRS-R-500
FRS-R-600
Carton Quantity and Weight
Ampere
Ratings
65–100
101–200
201–400
401–600
*Weight per carton.
Carton
Qty.
1
1
1
1
Weight*
Lbs.
0.54
1.22
3.00
5.00
Kg.
0.245
0.544
1.359
2.268
General Information:
• Provides motor overload, ground fault and short-circuit
protection. When used in circuits subject to surge currents
such as those caused by motors, transformers and other
inductive components, these fuses can be sized close to
full-load amps to give maximum overcurrent protection.
• The time-delay feature makes it possible to use fuse amp
ratings which are much smaller than those of non-time-delay
fuses. Considerable cost saving occurs by permitting the use
of smaller size switches, panels and fuses themselves.
• Provides a good degree of short-circuit protection (greater
current-limitation) to help protect downstream components
from high fault currents.
• Gives motor running back-up protection to motors without
extra cost.
• Helps protect motors against burnout from overloads and
single-phasing when sized properly.
• Simplifies and improves blackout prevention (selective
coordination ratios).
• Dual-element fuses can be applied in circuits subject to
temporary motor overloads and surge currents to provide
both high-performance, short-circuit and overload protection.
Fuse Reducers For Class R Fuses
Equipment
Fuse Clips
Desired
Fuse (Case)
Size
100A
100A
200A
100A
600A
200A
400A
**Single reducer only (pair not required).
For additional information, see Data Sheet: 1118.
Catalog Number
(Pairs)
600V
No. 2621-R
No. 2641-R
No. 642-R
No. 2661-R
No. 2662-R
No. 2664-R**
Recommended Fuse Blocks
These are the most commonly used fuse blocks for Class R
600V fuses.
65-100A
110-200A
225-400A
R60100-3CR
R60200-3CR
R60400-3CR
3-Pole
3-Pole
3-Pole
200A
400A
For other available fuse blocks, see Data Sheet 1111.
†
To obtain information for 0-60A, see Data Sheet: 1017.
06-08 BU-SB08062
Page 1 of 2
Data Sheet 1018
200A
100A
400A
600A
Current-Limiting Effects
FRS-R Apparent RMS Symmetrical Let-Through Current
Prospective
SCC
30A
60A
100A
200A
400A
5,000
1,400
2,000
2,900
3,950
5,000
10,000
1,850
2,650
3,600
5,100
8,550
15,000
2,200
3,200
4,100
5,950
9,750
20,000
2,450
3,550
4,500
6,600
10,700
25,000
2,700
3,900
4,850
7,150
11,500
30,000
2,900
4,280
5,150
7,650
12,200
35,000
3,100
4,400
5,400
8,100
12,800
40,000
3,300
4,760
5,600
8,500
13,400
50,000
3,550
5,150
6,050
9,250
14,400
60,000
3,800
5,500
6,400
9,850
15,250
80,000
4,300
6,100
7,000
10,950
16,750
100,000
4,500
6,600
7,550
11,900
18,000
150,000
5,200
8,000
8,600
13,800
20,550
200,000
5,800
8,500
9,400
15,350
22,550
600A
5,000
10,000
13,700
15,000
16,100
17,050
17,900
18,700
20,050
21,250
23,300
25,000
28,450
31,200
Time-Current Characteristic Curves–Average Melt
15A
Amp
Rating
30A
60A
300
100
10
Time In Seconds
For information on previous design FRS-R, 70-600, see
Data Sheet: 1153.
Current-Limitation Curves
400,000
FRS-R (600V)
B
1
Instantaneous Peak Let Thru Current Amps
Amp
Rating
.1
100,000
600A
400A
200A
100A
.01
1,000
20
100
10,000
60A
30A
RMS Symmetrical Current In Amps
A
RMS Symmetrical Currents In Amps
A–B=Asymmetrical Available Peak (2.3 x Sym RMS Amps)
The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper Bussmann Network Drive. All other copies of
this document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information
that will help the end user with design applications. Cooper Bussmann reserves the right, without notice, to change design or construction of any
products and to discontinue or limit distribution of any products. Cooper Bussmann also reserves the right to change or update, without notice, any
technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
© 2008 Cooper Bussmann
St. Louis, MO 63178
www.cooperbussmann.com
06-08 BU-SB08062
100,000
200,000
1,000
10,000
1,000
Page 2 of 2
Data Sheet 1018
10,000
20,000
Industrial Control Electronics
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