0713 BU-SB13730 Page 1 of 3 Data Sheet # 1019
FUSETRON™ 250V Class RK5
FRN-R — 250Vac/125Vdc, 1⁄10-60A, Dual Element, Time-Delay Fuses
Description: Advanced protection, energy efficient Class RK5
dual element, current-limiting, time-delay fuses with optional
open fuse indication on select ratings.
Time-delay – 10 seconds (minimum) at 500% of rated current
(8 seconds for 1⁄10-30A sizes).
Catalog Symbol: FRN-R-(amp) (non-indicating)
FRN-R-(amp)ID (indicating)
Ratings:
Volts — 250Vac, 125Vdc
Amps — 1⁄10-60 Amps
IR — 200kA Vac RMS Sym.
— 20kA Vdc
Agency Information:
CE, UL Listed, Std. 248-12, Class RK-5, Guide JDDZ,
File E4273
CSA Certified, C22.2 No. 248.12, Class 1422-02, File 53787
Catalog Numbers (amps) — Non-indictaing fuses
FRN-R-1⁄10 FRN-R-18⁄10 FRN-R-8*
FRN-R-1⁄8FRN-R-2 FRN-R-9*
FRN-R-15⁄100 FRN-R-21⁄4FRN-R-10*
FRN-R-2⁄10 FRN-R-21⁄2FRN-R-12*
FRN-R-1⁄4FRN-R-28⁄10 FRN-R-15*
FRN-R-3⁄10 FRN-R-3 FRN-R-171⁄2*
FRN-R-4⁄10 FRN-R-32⁄10 FRN-R-20*
FRN-R-1⁄2FRN-R-31⁄2FRN-R-25*
FRN-R-6⁄10 FRN-R-4 FRN-R-30*
FRN-R-8⁄10 FRN-R-41⁄2FRN-R-35*
FRN-R-1 FRN-R-5 FRN-R-40*
FRN-R-11⁄8FRN-R-56⁄10 FRN-R-45*
FRN-R-11⁄4FRN-R-6 FRN-R-50*
FRN-R-14⁄10 FRN-R-61⁄4FRN-R-60*
FRN-R-11⁄2FRN-R-7
FRN-R-16⁄10 FRN-R-71⁄2
* Open fuse indication available by inserting the sufix “ID.” E.g., FRN-R-15ID.
Carton Quantity and Weight
Amp Rating Carton Qty.
1⁄10–15 10
171⁄2–30 10
35–60 10
Dimensions - in
Features:
• 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.
Recommended Fuse Blocks
Fuse Amps 1-Pole 2-Pole 3-Pole
0-30 H25030-1 H25030-2 H25030-3
R25030-1 R25030-2 R25030-3
35-60 H25060-1 H25060-2 H25060-3
R25060-1 R25060-2 R25060-3
For additional information on the 250 volt fuse blocks, see
Data Sheets # 1110 (R250), # 1112 (H250).
Fuse Reducers For Class R Fuses
Equipment Desired Fuse Catalog Numbers
Fuse Clips (Case) Size (Pairs) 250V
60A 30A NO.263-R
100A 30A NO.213-R
60A NO.216-R
200A 60A NO.226-R
For additional information on Class R fuse reducers, see
Data Sheet # 1118.
0.56" (±0.008)
2"
(± 0.31)
1/10 to 30A
3"
35 to 60A
0.81" (±0.008)
(± 0.31)
0713 BU-SB13730 Page 2 of 3 Data Sheet # 1019
FUSETRON™ 250V Class RK5
Time-Current Curves - Average Melt
1⁄10 to 61⁄4Amps
AMP RATING
CURRENT IN AMPS
TIME IN SECONDS
FRN-R — 250Vac/125Vdc, 1⁄10-60A, Dual Element, Time-Delay Fuses
0713 BU-SB13730 Page 3 of 3 Data Sheet # 1019
FUSETRON™ 250V Class RK5
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.
Current-Limitation CurvesTime-Current Curves - Average Melt
8 to 60 Amps
400000
9000
8000
7000
7000
6000
6000
300000
200000
100000
5000
4000
4000
90000
3000
2000
1000
3000
70000
80000
70000
60000
B
A
50000
60000
200000
20000
2000
40000
100000
50000
10000
5000
1000
30000
90000
80000
40000
9000
8000
30000
20000
10000
30A
60A
AMP RATING
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS
PROSPECTIVE SHORT-CIRCUIT CURRENT - SYMMETRICAL RMS AMPS
FRN-R — 250Vac/125Vdc, 1⁄10-60A, Dual Element, Time-Delay Fuses
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.
AMP RATING
CURRENT IN AMPS
TIME IN SECONDS
810 15 30 60
Current-Limiting Effects
Prosp. Let-Through Current
S.C.C. (Apparent RMS Symmetrical Vs. Fuse Rating)
30A 60A
5000 1000 2000
10,000 2000 3000
15,000 2000 3000
20,000 2000 4000
25,000 2000 4000
30,000 2000 4000
35,000 2000 4000
40,000 2000 5000
50,000 3000 5000
60,000 3000 5000
70,000 3000 6000
80,000 3000 6000
90,000 3000 6000
100,000 3000 6000
150,000 4000 7000
200,000 4000 8000
