FIXED FUSIBLE RESISTORS
KAMAYA OHM
FRN
¥
Features
weight.
3. Pre-formed products available by request.
4. Metal-film resistor element gives stable characteristics under
normal conditions.
5. Fusing immediately under abnormal overload.
1. Resistor fuses in overload conditions.
2. Suitable for use with paper-phenol PBC due to small size and light
¥
Dimensions
B
d
H
L
H
B
D
Unit : mm
Style
FRN1/4
FRN1/2
FRN1
L
6.5 0.5
8.5 1.0
11.0 1.0
D
2.3 0.5
3.0 0.5
4.0 1.0
H
30 3
30 3
35 3
d
0.6 0.05
0.6 0.05
0.7 0.05
*Unit weight/pc.
218mg
292mg
655mg
*Values for reference
*There is a broad space between the second and the third color bands.
¥
Part Number Description
Example
Style
Leaded Resistors
FRN
1/2
A
101
J
B
Product Type
Rated Dissipation
1/4 0.25W
1/2 0.5W
1.0W
1
Rated Resistance
E24 Series
e.g.: 2R2=2.2 ohm
101=100 ohm
B
HA
HB
TB
TD
Bulk (Straight)
*Packaging
Horizontal Forming (Kinked)
Horizontal Forming (Free-Standing)
52 mm Width Tape (Ammo Box)
52 mm Width Tape (Reel)
All Styles
FRN1/4
FRN1/2
*Refer to Tape and Packaging information on pages 68~71.
Fusible Characteristic
A
Characteristic A
Tolerance on Rated Resistance
J
5%
52
Product specifications contained in this catalogue are subject to change at any time without notice. Please confirm specifications with your order.
KAMAYA OHM
FIXED FUSIBLE RESISTORS
FRN
•
Ratings
Style
FRN 1/4
FRN 1/2
FRN 1
Rated Dissipation Temperature Coefficient
of Resistance
at 70
°
C
-6
10 /
°
C
W
0.25
0.5
1.0
Rated Resistance
Range
Tolerance on
Rated Resistance
Perferred Number
Series
for Resistors
Category Temperature
Range
°
C
±
300
1.0 ohm~1k ohm
J (
±
5%)
E24
–25~+155
Note1. Rated Voltage = (Rated Dissipation)
´
(Nominal Resistance).
(d.c. or a.c. r.m.s. Voltage)
•
Percentage of the rated dissipation(%)
Derating Curve
100
The derated values of dissipation for temperatures in excess of
70
°
C shall be indicated by the following Curve.
Area of recommended operation
0
-25
70
155
Ambient Temperature(
°
C)
•
Performance Characteristics
Description
Resistance
Temperature characteristic
of resistance
Overload
Voltage proof
Pulling
Lead is not cut, Terminal is not loose
Bending
Vibration
Resistance to soldering
heat
Solderability
Rapid change of
temperature
Humidity
(Normal Condition)
Endurance in humidity
Endurance at 70
°
C
Within
±
(1%
+
0.05 ohm)
No mechanical damage
Within
±
(1%
+
0.05 ohm)
No major visible damage
At least 95% of the dipping surface must be covered
by new solder
Within
±
(1%
+
0.05 ohm)
No major visible damage Markings legible
Within
±
(5%
+
0.1 ohm)
No major visible damage Markings legible
Within
±
(5%
+
0.1 ohm)
No major visible damage Markings legible
Within
±
(5%
+
0.1 ohm)
No major visible damage Markings legible
This must melt and cut within the time indicated
below without burning or arcing characteristic A
24s at 15 times rated dissipation.
But with FRN1/4 R
<
4.7 ohm.
30s at 15 times rated dissipation.
Requirements
Within specified tolerance
See Ratings Table
Within
±
(1.5%
+
0.05 ohm)
No major visible damage
No flashover, scorching or insulation breakdown
Test Method JIS C5202-1990
Clause 5.1
Clause 5.2
Clause 5.5
Clause 5.7
Room temperature and 100
°
C above.
Condition A
Rated Voltage
´
2.5, 5s
FRN1/4
:300Va.c., 60s
FRN1/2,1 :350Va.c., 60s
:10N for 5~10s
:25N for 5~10s
Bond strength
of the face plating
Clause 6.1.2 (1) FRN1/4,1/2
FRN1
Clause 6.1.2 (4) 5N, 2 times
Clause 6.3
Clause 6.4
Clause 6.5
Clause 7.4
Clause 7.5
Clause 7.9
Clause 7.10
Type A
10
~
55Hz, 3 directions, 2h each
350
°
C, 2
~
2.5mm from the body 3.5s.
235
°
C, 5s
-
25
°
C/
+
85
°
C for 5 cycles.
40
°
C 90
~
95%R.H. 500h.
Rated voltage, 1.5h "ON", 0.5h "OFF",
40
°
C, 95%R.H., 1,000h.
Rated Voltage, 1.5h "ON", 0.5h "OFF",
70
°
C, 1,000h.
Leaded Resistors
Fusing
characteristic
Using the resistor without turning on electricity as
the testing sample at room temperature with no wind,
apply a voltage equivalent to the rated dissipation ratio
(keep the voltage fixed while testing), and measure
the times until the circuit current decreases drastically.
Note2. Fusing characteristic of constant current circuit is available on your request.
Note3. Other fusing characteristic products are also available. Contact KAMAYA for further details.
Product specifications contained in this catalogue are subject to change at any time without notice. Please confirm specifications with your order.
53
KAMAYA OHM
FIXED FUSIBLE RESISTORS
FRN
•
Observation for smoke during fusing out
To illustrate fusing characteristics and flame resistance of KAMAYA
OHM FRN type resistors. These pictures were taken of a 10 ohm
FRN1/2 subjected to an overload of 15 times rated power at room
temperature.
Figure-1
Figure-2
The pictures taken at various time intervals graphically record the
ability of the FRN1/2 to withstand severe overload without smoke.
Figure-3
Before the voltage charge
3 seconds after the voltage charge
Immediately after fusing
•
Example of Typical Fusing Characteristics
FRN 1/4
Rated Resistance:4.7 ohm
30
30
Rated Resistance:47 ohm
30
Rated Resistance:100 ohm
25
25
25
Fusing Time(s)
Fusing Time(s)
15
15
Fusing Time(s)
0
5
10
15
20
25
30
20
20
20
15
10
10
10
5
5
5
0
0
5
10
15
20
25
30
0
0
0
5
10
15
20
25
30
Rated dissipation ratio P/P
N
(Times)
Rated dissipation ratio P/P
N
(Times)
Rated dissipation ratio P/P
N
(Times)
FRN 1/2
Leaded Resistors
Rated Resistance:4.7 ohm
30
30
Rated Resistance:47 ohm
30
Rated Resistance:100 ohm
25
25
25
Fusing Time(s)
Fusing Time(s)
15
15
Fusing Time(s)
0
5
10
15
20
25
30
20
20
20
15
10
10
10
5
5
5
0
0
5
10
15
20
25
30
0
0
0
5
10
15
20
25
30
Rated dissipation ratio P/P
N
(Times)
Rated dissipation ratio P/P
N
(Times)
Rated dissipation ratio P/P
N
(Times)
54
Product specifications contained in this catalogue are subject to change at any time without notice. Please confirm specifications with your order.
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