Fusetron
®
Dual-Element, Time-Delay Fuses
Class RK5 - 250 Volt
Dimensional Data
2"
(± 0.31)
0.56" (± 0.008)
1
/
10
A
FRN-R
1
⁄
10
-60A
to 30A
3"
(± 0.31)
0.81" (± 0.008)
35A to 60A
Catalog Symbol:
FRN-R
Current-Limiting
Dual-Element, Time-Delay – 10 seconds (minimum) at 500%
rated current (8 seconds for 0-30A sizes)
Ampere Rating:
1
⁄
10
to 60 Amperes
Voltage Rating:
250Vac (or less)
Interrupting Rating:
200,000A RMS Sym.
DC Ratings: 20,000 AIC @ 125Vdc
Agency Information:
UL Listed, Std. 248-12, Class RK-5, Guide JDDZ, File E4273
CSA Certified, C22.2 No. 248.12, Class 1422-01, File 53787
Catalog Numbers
FRN-R-
1
⁄
10
FRN-R- ⁄
8
1
FRN-R-1
8
⁄
10
FRN-R-2
FRN-R-2 ⁄
4
1
1
8
FRN-R-8
FRN-R-9
FRN-R-10
FRN-R-12
FRN-R-15
FRN-R-17
1
⁄
2
FRN-R-20
FRN-R-25
FRN-R-30
FRN-R-35
FRN-R-40
FRN-R-45
FRN-R-50
FRN-R-60
—
—
FRN-R- ⁄
100
15
2
1
3
FRN-R- ⁄
10
FRN-R- ⁄
4
FRN-R- ⁄
10
FRN-R-
4
⁄
10
FRN-R- ⁄
2
1
6
FRN-R-2 ⁄
2
FRN-R-2 ⁄
10
FRN-R-3
FRN-R-3
2
⁄
10
FRN-R-3 ⁄
2
1
General Information:
• Provides motor overload, ground fault and short-circuit
protection.
• Helps protect motors against burnout from overloads.
• Helps protect motors against burnout from single phasing
on three phase systems.
• Simplifies and improves blackout prevention (selective
coordination).
• 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.
• The overload element provides protection against low level
overcurrent of overloads and will hold an overload which is
five times greater than the ampere rating of the fuse for a
minimum of ten seconds.
Fuse Reducers For Class R Fuses
Equipment
Fuse Clips
60A
100A
200A
Desired Fuse
(Case) Size
30A
30A
60A
60A
Catalog Number
(Pairs) 250V
No. 263-R
No. 213-R
No. 216-R
No. 226-R
FRN-R- ⁄
10
FRN-R-
8
⁄
10
FRN-R-1
FRN-R-1
1
⁄
8
FRN-R-1 ⁄
4
1
4
1
6
FRN-R-4
FRN-R-4
1
⁄
2
FRN-R-5
FRN-R-5
6
⁄
10
FRN-R-6
FRN-R-6 ⁄
4
1
FRN-R-1 ⁄
10
FRN-R-1 ⁄
2
FRN-R-1 ⁄
10
FRN-R-7
FRN-R-7 ⁄
2
1
Fuseblocks for Class R Fuses
(Clip Retaining Spring Standard, Suffix “R”)
See Data Sheet 1110
Basic
Catalog
Poles Number
1
R25030-1
2
3
1
2
3
R25030-2
R25030-3
R25060-1
R25060-2
R25060-3
Terminal
Screw w/
—
Pres.
Plate
SR
PR
SR
SR
SR
SR
SR
PR
PR
—
—
—
Type (Suffix No.)
1
⁄
2
˝
Box Lug w/
—
Clip
Quick-
CU only Connect
CR
COR
QR
CR
CR
CR
CR
CR
COR
COR
—
—
—
—
—
—
—
—
Carton Quantity and Weight
Ampere
Ratings
0–15
17.5–30
35–60
*Weight per carton.
Carton
Qty.
10
10
10
Weight*
Lbs.
0.40
0.50
1.00
Kg.
0.181
0.227
0.453
Amps
1
⁄
10
to
30
31
to
60
10-08 BU-SB08353
Page 1 of 2
Data Sheet 1019
Time-Current Characteristic Curves–
Average Melt
Time-Current Characteristic Curves–Average Melt
8 10 15
30
60
Current-Limitation Curve
Peal Current In Amps
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 informa-
tion 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.
© 2009 Cooper Bussmann
St. Louis, MO 63178
www.cooperbussmann.com
10-08 BU-SB08353
Page 2 of 2
Data Sheet 1019
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