Fusetron®FRN-R
Dual-Element, Time-Delay Fuses ⁄Ω¡º-60A
Class RK5 – 250 Volt
Form No. FRN-R ⁄Ω¡º-60
Page 1 of 3
BIF Doc #1019
Bussmann®
9-7-99
SB99013 Rev. A
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.
1/10 A to 30A
.56" (± 0.008)
2"
(± 0.31)
35A to 60A
.81" (± 0.008)
3"
(± 0.31)
Catalog Symbol: FRN-R
Current-Limiting
Dual-Element, Time-Delay – 10 seconds (minimum) at 500%
rated current
Ampere Rating: ⁄Ω¡º to 60 Amperes
Voltage Rating: 250 Volts AC (or less)
Interrupting Rating: 200,000A RMS Sym.
DC Ratings: 20,000 AIC @ 125 VDC
Agency Approvals:
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-⁄Ω¡º FRN-R-1°Ω¡º FRN-R-8
FRN-R-⁄Ω• FRN-R-2 FRN-R-9
FRN-R-⁄fiΩ¡ºº FRN-R-2⁄Ω¢ FRN-R-10
FRN-R-¤Ω¡º FRN-R-2⁄Ω™ FRN-R-12
FRN-R-⁄Ω¢ FRN-R-2°Ω¡º FRN-R-15
FRN-R-‹Ω¡º FRN-R-3 FRN-R-17⁄Ω™
FRN-R-›Ω¡º FRN-R-3¤Ω¡º FRN-R-20
FRN-R-⁄Ω™ FRN-R-3⁄Ω™ FRN-R-25
FRN-R-flꭧ FRN-R-4 FRN-R-30
FRN-R-°Ω¡º FRN-R-4⁄Ω™ FRN-R-35
FRN-R-1 FRN-R-5 FRN-R-40
FRN-R-1⁄Ω• FRN-R-5flΩ¡º FRN-R-45
FRN-R-1⁄Ω¢ FRN-R-6 FRN-R-50
FRN-R-1›Ω¡º FRN-R-6⁄Ω¢ FRN-R-60
FRN-R-1⁄Ω™ FRN-R-7 —
FRN-R-1flΩ¡º FRN-R-7⁄Ω™ — Fuseblocks for Class R Fuses
(Clip Retaining Spring Standard, Suffix “R”)
Terminal Type (Suffix No.)
Basic Screw w/ Box Lug w/ ⁄Ω¢∑
Catalog — Pres. — Clip Quick-
Amps Poles Number Plate CU only Connect
⁄Ω¡º 1 R25030-1 SR PR CR COR QR
to 2 R25030-2 SR PR CR COR QR
30 3 R25030-3 SR PR CR COR QR
31 1 R25060-1 SR — CR COR —
to 2 R25060-2 SR — CR COR —
60 3 R25060-3 SR — CR COR —
Fuse Reducers For Class R Fuses
Equipment Desired Fuse Catalog Number
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
Carton Quantity and Weight
Ampere Carton Weight*
Ratings Qty. Lbs. Kg.
0–15 10 0.40 0.181
17.5–30 10 0.50 0.227
35–60 10 1.00 0.453
*Weight per carton.
Dimensional Data
CE logo denotes compliance with European Union Low Voltage Directive
(50-1000 VAC, 75-1500 VDC). Refer to BIF document #8002 or contact
Bussmann Application Engineering at 636-527-1270 for more information.
Fusetron®FRN-R
Dual-Element, Time-Delay Fuses ⁄Ω¡º-60A
Class RK5 – 250 Volt
Form No. FRN-R ⁄Ω¡º-60
Page 2 of 3
BIF Doc #1019
Bussmann®
9-7-99
SB99013 Rev. A
300
100
10
1
.1
.01
.1
1
10
100
1,000
CURRENT IN AMPERES
TIME IN SECONDS
.1
.2
.15
.3
.4 .6
.5
.8
11.25
1.6
22.5
3.2 4
56.25
8
10
12
AMPERE RATING
CURRENT IN AMPERES
TIME IN SECONDS
300
100
10
1
.1
.01
10
100
1,000
10,000
60A
30A
AMPERE
RATING
15A
8A
10A
Time-Current Characteristic Curves–Average Melt
Bussmann®
Fusetron®FRN-R
Dual-Element, Time-Delay Fuses ⁄Ω¡º-60A
Class RK5 – 250 Volt
Form No. FRN-R ⁄Ω¡º-60
Page 3 of 3
BIF Doc #1019
9-7-99
SB99013 Rev. A
The only controlled copy of this BIF document is the electronic read-only version located on the 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. Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information con-
tained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
Current-Limitation Curve
