KAMAYA OHM
FIXED CARBON COMPOSITION RESISTORS
RC
•
Ratings
Style
RC1/4
Combination of Rated Resistance Range and Temperature Coefficient of Resistance
Rated Dissipation Limiting Element
Rated Resistance
Tolerance on Rated Resistance and
at 70°C
Voltage
Temperature Coefficient of Resistance %
Rated Resistance
Range
Perferred Number Series for Resistors
W
V
Range
at –55
°C
at +125
°C
0.25
250
1 ohm~5.6M ohm
+6.5 ~0
+10 ~0
+13 ~0
+15 ~0
+20 ~0
+1~ –5
0~ –6
0~ –7.5
0~ –10
0~ –15
1 ohm ~ 1k ohm
1.1k ohm ~ 10k ohm
11k ohm ~100k ohm
110k ohm ~ 1M ohm
1.1M ohm ~ 22M ohm
Isolation
Voltage
V
100
Category Temperature
Range
°C
RC1/2
0.5
350
1 ohm~22M ohm
J (
±
5%)
: E24
K (
±
10%)
: E12
M(
±
20%)
: E6
–55~+125
500
Note1. Rated Voltage = (Rated Dissipation)×(Rated Resistance). (d.c. or a.c. r.m.s. Voltage)
Note2. Limiting Element Voltage can only be applied to resistors when the resistance value is equal to or higher than the critical resistance value.
Note3. Critical Resistance Value is the resistance value at which the rated voltage is equal to the limiting element voltage.
•
Storage
Temperature 20 15°C, Humidity 60%R.H. Max, Recommendation Storing Term 6 months after shipped from factory.
•
Climatic Category
55/125/56
Lower Category Temperature
Upper Category Temperature
Duration of the Damp heat, Steady-State Test
−55°C
+125°C
56 days
JIS C 5201-1 : 1998
Requirements
No breakdown or flashover
See Ratings Table
∆R≤±(2%+0.1
ohm)
No visible damage, legible marking
Tensile
Robustness
Bending
of terminations
Torsion
Solderability
Resistance to soldering
heat
Rapid change of
temperature
Climatic sequence
Damp test, steady state
Endurance at 70°C
Endurance at the upper
category temperature
∆R≤±(2%+0.1
ohm) No visible damage
∆R≤±(2%+0.1
ohm) No visible damage
∆R≤±(2%+0.1
ohm) No visible damage
In accordance with Clause 4.17.4.5
∆R≤±(3%+0.1
ohm)
No visible damage, legible marking
∆R≤±(2%+0.1
ohm) No visible damage
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
-55
•
Performance Characteristics
Description
Voltage proof
Variation of resistance
with temperature
Overload
70
125
Ambient Temperature(°C)
Test Methods
Clause 4.7
Clause 4.8
V−block method RC1/4 100Va.c.,60s
RC1/2 500Va.c.,60s
Measuring temperature :
+20°C/−55°C/
+20°C/+125°C/+20°C
Clause 4.13 The applied voltage shall be 2.5 times of the
rated voltage or twice of the limiting element voltage,
whichever is the less Severe, 5s.
Clause 4.16.2 10N for 5∼10s
Clause 4.16.3 5N twice
Clause 4.16.4 180°C, 2 rotation
Clause 4.17 235°C, 5s
Clause 4.18 After immersion into the flux, the immersion
into solder shall be carried out 4mm from the
body at 350°C for 3.5s.
Clause 4.19 5 cycles between
−55°C
and
+125°C.
Clause 4.23 Dry/Damp heat(12+12h cycle), first cycle./
Cold/Damp heat(12+12h cycle), remaining cycle./
D.C.Load.
Clause 4.24 40°C, 95%R.H., 56 days, test a) , b) and c) of
Clause 4.24.2.1
Clause 4.25.1 Rated voltage, 1.5h "ON", 0.5h "OFF",
70°C, 1,000h.
Clause 4.25.3 125°C, no-load, 1,000h.
∆R≤±(10%+0.5
ohm) Insulation resistance : R≥100M ohm
No visible damage
∆R≤±(10%+0.5
ohm) Insulation resistance : R≥100M ohm
No visible damage, legible marking
∆R≤±(10%+0.5
ohm) No visible damage
Insulation resistance : R≥1G ohm
∆R≤±(10%+0.5
ohm) No visible damage
Insulation resistance : R≥1G ohm
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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59
KAMAYA OHM
FIXED CARBON COMPOSITION RESISTORS
RC
•
Typical Characteristics
•Surge Resistance Characteristics
Charging and discharging a 2,000 pF capacitor for 100 cycles.
10
10
0
∆R/R(%)
a
b
∆R/R(%)
0
c
RC1/2
a : 1.2M ohm
b : 10k ohm
c : 1k ohm
0
2
4
6
8
10
12
a
b
-10
RC1/4
a : 1.2M ohm
b : 33k ohm
c : 1k ohm
0
2
4
6
8
10
c
−10
-20
−20
-30
12
14
Voltage(kV)
−30
14
Voltage(kV)
•Relationship between Load Ratio and
Category Temperature
0
0
∆R/R(%)
−5
Load FactorP/Ph=1.25
1.0
−10
RC1/2 100k ohm n=50
2,500 hours
30
50
70
90
110
130
0.75
0.5
•Endurance at 70°C
0
∆R/R(%)
0.25
−1
RC1/4
−2
220k ohm in an
atomosphere of 70°C
−3
0
100
500
1000
Testing Time(Hrs.)
RC1/2
−15
Ambient Temperrature(°C)
•Variation with Time
Condition : 5~35°C , 45~85% R.H.
3
a : RC1/4 100k ohm
b : RC1/4 1k ohm
c : RC1/2 1M ohm
•Frequency Characteristics
100
∆Rac/Rdc(%)
2
∆R/R(%)
1
0
−1
0
75
a
b
c
50
a : RC1/4
b : RC1/2
25
b
a
2
4
6
8
10
12
0
0.1
0.5
1
5
10
50
100
Variation with Time(month)
(MHz . M ohm)
•
Reliability Test
"Typical characteristics indicate the mean values of
∆R/R
etc."
Endurance in humidity
Samples :
RC1/4J,100 ohm,1k ohm,10k ohm,100k ohm×150 each. Total 2,400.
Conditions :
Direct current voltage equivalent to the following load ratings in cycles on "ON" for 1.5h and "OFF" for 0.5h for
a total of 5,000h in an atmosphere of 40°C, 90 to 95%R.H.
Criterion
(%)
Load Ratio
P/Pn
(%)
0
20
60
100
Total
Total
Total Testing Time
T(Hrs. )
2.984X10
2.990X10
6
2.997X10
6
2.992X10
6
1.196X10
7
1.20X10
7
6
Number of Failures
r(pcs.)
6
4
2
3
15
0
0.201
0.134
0.067
0.100
0.125
0.0055
Failure Ratio
CL(60%)
0.244
0.176
0.104
0.139
0.138
0.007
∆R/R
5
10
Average Lifetime
(60% reliability level)
(Hrs.)
4.098×10
5
5.682×10
5
9.615×10
5
7.194×10
5
7.209×10
5
1.299×10
7
60
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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