TOKEN
FRN, FKN, FSQ Fusible Resistors
Fusible Resistors
Fusible Resistors - FRN, FKN, FSQ Series
Fusible Resistor Features Best of Both Worlds
Preview
Designers of small power supplies and battery chargers for
consumer products can benefit from a fusible resistor with
superior lightning strike and pulse abilities in a cost effective
package.
Token Electronics offers a combination resistor/fuses series
of metal/carbon film fusbile resistor (FRN), wirewound
fusbile resistor (FKN) and cement encased fusbile resistors
(FSQ). Token offers fusbile FRN series a low-cost
alternative to traditional solutions for applications that
require surge protection.
The robust cement-coated wire-wound FSQ resistors and
wirewound fusbile FKN resistors are ideal for power supply applications across the telecomms, military and
industrial markets which require a replacement for carbon composition resistors within the circuit design.
As part of the Token input protection range, this resistor provides a key fusible solution and is completely
customisable to suit the individual application design requirements. Key design engineers with a need for a
robust resistor, will find the FRN, FKN and FSQ series are a multifaceted product, providing comparable pulse
performance with added fusing capabilities.
Our custom solutions are designed to address your need for technical and economic success in a timely manner.
Contact us with your specific needs.
Features
- Low Cost
- Low Noise
- Reduced numbers of parts used in circuits
- Products with Pb-free Terminations and RoHS compliant
Applications
- Telecommunications
- Household appliances
- Inrush Pulse protection
- Lightning strike protection
- Input protection for small power supplies and battery chargers
Version 2010
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01 of 04
TOKEN
FRN, FKN, FSQ Fusible Resistors
Metal Film Fusible (FRN) - Specifications & Dimensions (Unit: mm)
Trimming Line
Ceramic Core
d
Marking
H
Type
Rated
Wattage
1/4W
1/2W
1W
2W
3W
Coating
Resistive
Film
End
Cap
Lead
Wire
L
Resistance
Range
0.22Ω~100KΩ
0.22Ω~100KΩ
0.22Ω~100KΩ
0.3Ω~100KΩ
0.3Ω~100KΩ
D
d ± 0.05
0.40~0.50
0.50~0.55
0.50~0.55
0.75~0.80
0.75~0.80
Dimension (mm)
L ± 1.5 D ± 1 H ± 0.5 W ± 0.5 H ± 3
6
6
9
11
15
2.3
2.3
3.0
4.0
5,0
26
26
26
26
35
Dielectric
Withstanding
Voltage
300V
300V
350V
500V
500V
FRN
Wirewound Fusible (FKN) - Specifications & Dimensions (Unit: mm)
d
H
Rated
Wattage
1W
2W
3W
5W
6W
L
Dimension (mm)
Resistance
Range
0.1Ω~22Ω
0.1Ω~60Ω
0.1Ω~100Ω
0.2Ω~200Ω
0.3Ω~250Ω
D
Dielectric
Withstanding
Voltage
500V
500V
500V
500V
500V
Type
L ± 1.5 D ± 1 H ± 0.5 W ± 0.5 H ± 3
9
11
15
17
24
4.5
5.0
5.5
6.5
8.5
26
26
35
35
38
d ± 0.05
0.50~0.55
0.75~0.80
0.75~0.80
0.75~0.80
0.75~0.80
FKN
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Version 2010
TOKEN
W
FRN, FKN, FSQ Fusible Resistors
Ceramic Cement Fusible (FSQ) - Specifications & Dimensions (Unit: mm)
H
d
L
Rated
Wattage
2W
3W
5W
7W
10W
Dimension (mm)
L ± 1.5 D ± 1 H ± 0.5 W ± 0.5 H ± 3
18
22
22
35
48
7
8
9
9
9
7
8
10
10
10
35
35
35
35
35
20 Min
Resistance
Range
0.1Ω~22Ω
0.1Ω~120Ω
0.2Ω~120Ω
0.3Ω~250Ω
0.3Ω~500Ω
Dielectric
Withstanding
Voltage
1000V
1000V
1000V
1000V
1000V
Type
d ± 0.05
0.50~0.55
0.75~0.80
0.75~0.80
0.75~0.80
0.75~0.80
FSQ
FRN, FKN, FSQ - Electrical Characteristics
Test Items
Operating Temp.
Resistance Temp. Coeff.
Short Time Overload
Temp. Cycle
Load Life
Moisture-Proof Load Life
Solder Pot
Incombustibility
Condition
-30°C~155°C
-30°C~150°C
2 times of rated voltage for 5 sec.
-30°C~85°C for 5 cycles
25°C on-off cycle 1,000 hrs.
40°C 95°C RH on-off cycle 1,000 hrs.
270°C for 3 sec.
16 times of rated wattage for 5 min.
Spec.
± 200PPM / °C
±2%
±1%
±5%
±5%
±1%
not flamed
FRN, FKN, FSQ - Electrical Characteristics
POWER WATTAGE
16 X Rated Wattage
24 X Rated Wattage
32 X Rated Wattage
FUSING TIME
Within 2 min
Within 1 min
Within 30 sec.
Version 2010
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rfq token.com.tw
03 of 04
FRN, FKN, FSQ Fusible Resistors
FRN, FKN, FSQ - Application Notes
For fusible resistors, unlike fuses, fusing performance is given in terms of power rather than current.
The power can be calculated:
Power = Amperes 2 × Ohms
Fusing Device Application Notes
● When using, it shall be made sure that the overload conditions at unusual moments lie within the
fusing territory.
● Consult with Token in advance when overloaded higher than the rated voltage under an ordinary
situation since such an overload may store up damages on resistors.
● Use at the maximum open-circuit voltage or lower as an arc phenomenon may arise when high
voltage is applied again after fusing by an over current.
● Consult with us for the maximum open- circuit voltage because it varies with applications.
How to Order
FRN
1/2W
0.47R
J
Code
J
TB
Resistance Tolerance
±5%
Part Number: FRN, FKN, FSQ
Rated Power (W)
Resistance Value (Ω)
Code
Resistance Value
Resistance Tolerance (%)
R47
47R
470R
4K7
47K
0.47Ω
47Ω
470Ω
4.7KΩ
47KΩ
Package
Code
TB
P
Package
Taping Box
Bulk
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Version 2010
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