TOKEN
FKU/FRU Thermal Cut-offs Resistors
Thermal Cut-offs
Resistors
Cement Resistors with Thermal Cut-offs - FKU/FRU Series
Ultimate Protection Thermal Cutoffs
for High Power Applications
Preview
Fast-acting protection device for high-power applications combines thermal fuse element and resistor on a single
substrate.
Token offers FKU (Wirewound Resistor + Thermal Cut-offs) and FRU (Metal Oxide Film Resistor + Thermal
Cut-offs) two Series, both are a new concept in thermal fuse technology and are designed to protect against over-
heating in electrical products.
The two active components, a thermal cutoff is a fusible alloy and a resistor is a voltage divider, both are
surrounded by a ceramic cement with special resin. Under normal operating temperatures the fusible alloy joins
the two lead wires within the body of the cutoff and the power resistor acts as a normal function resistor. When
the preset temperature of the cutoff is reached, the fusible alloy melts and with the aid of the special resin,
complete cutoff is ensured.
By combining a thermal fuse element and resistor on a single substrate, Token has created a fast-acting ultimate
protection device for high power applications up to 10A/250V.
Resistance range of FKU Wirewound Type Thermal Cut-offs is 1Ω~100Ω and FRU Metal Oxide Film Type
Thermal Cut-offs is 110Ω~10KΩ. Both standard precision tolerance is J(±5%).
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
- Miniature size
- Radial leaded form
- Accurate fusing temperature
- Various temperature settings
- Current Rating: Up to 10Amp
- Products with Pb-free Terminations and RoHS compliant
- Economical by combining both function of a thermal fuse
and a pulse resistor
Applications
- Motors - fans, copiers, washing machines, air conditioners, compressors.
- Electronics - TVs, tape recorders, stereos, video recorders, fluorescent lamps, transformers, surge
suppressors, computers, telecommunication equipment.
- Appliances - electric blankets, space heaters, stoves, irons, hair dryers, cookers, toaster ovens, clothes
dryers, toasters, mixers, microwave ovens, crock pots.
Version 2010
http://www.token.com.tw/
rfq token.com.tw
01 of 03
TOKEN
W
FKU/FRU Thermal Cut-offs Resistors
D
Rated Power (%)
Power Derating Curve
General Specifications (Unit: mm)
120
100
80
60
40
20
25°C
H
5MM
5MN
ФD1
RM
ФD2
h
0
-40 -20 0 20 40 60 80 100 120 140 160
Ambient Temperature (
°C
)
Type
FKU/FRU-5M
FKU/FRU-7M
FKU/FRU-10M
W±1
13
13
16
D±1
9
9
12
H ± 1.5
25
38
35
Dimension (mm)
RM+2/-1
h
D1(R terminal)
5
5
4.5 ±1
0.8±0.1
7.5
D2(F terminal)
2A:0.6
±0.110A:1.0
±0.1
Electrical Performance
Fusing Temperature Protector
MARK
A
B
C
D
E
F
G
H
N
M
Fusing
Standard
Standard
Temperature(°C) Current(A) Voltage(V)
109+1/-3
129±4
152±4
10
188+3/-1
226+1/-3
250
95+3/-0
110±4
2
126±4
130±4
145±4
Rated Power
at 25°C (W)
5M
1.2
1.6
1.6
2.0
2.0
0.8
1.2
1.4
1.6
2.1
Resistance
Range(Ω)
FKU
FRU
Tolerance(%)
FKU
FRU
7M
1.4
2.0
2.0
2.4
2.4
1.2
1.4
1.6
2.0
2.4
10M
2.0
2.5
2.5
3.5
3.5
1~100 110~10K
J(±5)
K(±10)
J(±5)
02 of 03
http://www.token.com.tw/
rfq token.com.tw
Version 2010
TOKEN
How to Order
FKU/FRU Thermal Cut-offs Resistors
FRU
Part Number
Code
5M
Resistance Value
A
10R
Code
1R
10R
100R
1K
K
P
Resistance Value (Ω)
Metal Oxide type
Thermal Cut-offs
Wirewound type
Thermal Cut-offs
Resistance Value (Ω)
FRU
FKU
1Ω
10Ω
100RΩ
1000Ω
Rated Power (W): 5M, 7M, 10M
Thermal Cut-offs (Ω)
Code
Thermal Cut-offs
Resistance Tolerance (%)
Code
J
Resistance Tolerance (%)
A
B
C
D
E
F
G
H
N
M
109+1/-3°C
129±4°C
152±4°C
188+3/-1°C
226+1/-3°C
95+3/-0°C
110±4°C
126±4°C
130±4°C
145±4°C
K
Package
Code
P
±5%
±10%
Package
Bulk
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Version 2010
http://www.token.com.tw/
rfq token.com.tw
03 of 03
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