RC 1/4, 1/2, 1
resistors
fixed carbon composition resistors
features
•
Improved pulse endurance characteristics compared
to carbon-film devices
•
Wide resistance range is available: 1Ω - 22MΩ
•
Stability class: 10%
•
Marking: Four color coding bands on the surface
of resistor
dimensions and construction
L
D
d
H
Type
RC 1/4
RC 1/2
Marking
Resistive
Element
End
Cap
Lead
Wire
RC 1
L
Dimensions
inches
(mm)
D
H
d
.248±.028 .094±.004 1.181±.118 .024±.002
(6.3±0.7)
(2.4±0.1)
(30±3.0) (0.6±0.05)
.374
+.031
-.028
(9.5
+0.8
)
-0.7
.562±.02
(14.3±0.7)
.142±.008 1.102±.118
(3.6±0.2)
(28±3.0)
.224±.01
(5.7±0.3)
1.02±.01
(26±0.3)
.028
+.003
-.002
(0.7
+0.07
)
-0.05
.35±.001
(0.9±0.05)
Insulation Core
ordering information
New Part #
RC
Type
1/2
Power
Rating
1/4: 0.25W
1/2: 0.5W
1: 1W
T
Termination
Material
T: Sn
T52
Taping and Forming
T52 H Forming: 1/2 only
H60, H62: 1/4 only
A
Packaging
A: Ammo
R: Reel
Bulk:
No designation
(RC 1: Bulk Only,
500 pcs.)
104
Nominal
Resistance
2 significant
figures + 1
multiplier
J
Tolerance
J: ±5%
K: ±10%
applications and ratings
Style
Rated
Dissipation
at 70°C
W
0.2
Limiting
Element
Voltage
V
250
Rated
Resistance
Range
1 ohm ~
5.6M ohm
1 ohm ~
22M ohm
Temp. Coefficient
of Resistance %
@ -55°C @ +100°C @ +125°C
+6.5 ~ 0
+10 ~ 0
+13 ~ 0
RC 1/2
0.5
350
+15 ~ 0
+20 ~ 0
+6.5 ~ -3
RC 1
1.0
500
2.2 ohm ~
1.0M ohm
+10 ~ -3
+13 ~ -3
+15 ~ -3
––
––
––
––
––
+5 ~ -4
+6 ~ -5
+7.5 ~ -6
+1 ~ -7
+1 ~ -5
0 ~ -6
0 ~ -7.5
0 ~ -10
0 ~ -15
––
––
––
––
Rated Resistance
Range
1 ohm ~ 1k ohm
1.1k ohm ~ 10k ohm
11k ohm ~ 100k ohm
110k ohm ~ 1M ohm
1.1M ohm ~ 22M ohm
2.2 ohm ~ 1k ohm
12k ohm ~ 10k ohm
12k ohm ~ 100k ohm
120k ohm ~ 1M ohm
Tolerance
Isolation
Voltage
V
Operating
Temperature
Range
°C
RC 1/4
100
J (±5%):
E24 series
500
-55°C
to
125°C
K (±10%):
E12 series
1000
-55°C
to
100°C
Note 1 Rated Voltage:
√
(Rated dissipation) x (Rated resistance) (d.c. or a.c. r.m.s. voltage)
Note 2 Limited Element Voltage can only be applied to resistors when the resistance value is equal to or higher than the critical resistance value.
For further information on packaging, please refer to Appendix C.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
5/15/05
94
KOA Speer Electronics, Inc.
• Bolivar Drive • P Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
.O.
RC 1/4, 1/2, 1
fixed carbon composition resistors
environmental applications
Derating Curve
100
80
% Rated Power
60
RC1/4, RC1/2
40
20
RC1
0
-60 -40 -20
-55
0
80 100 120 140 160
70
125
Ambient Temperature
(°C)
40
60
20
Performance Characteristics
Parameter
Visual Examination
Resistance
Voltage Proof
Requirement
Markings shall be legible, as checked by
visual examination
Resistance value shall correspond with the rated
resistance taking into account the specific tolerance
No breakdown or flashover
Test Method
Clause 4.4.1
Checked by visual examination
Clause 4.5
Clause 4.7, V-block method RC 1/4 100 Va.c., 60s
RC 1/2 500 Va.c., 60s
RC 1 1000 Va.c., 60s
Clause 4.8 Measuring temperature: +20°C/-55°C/+20°C/
+125°C/+20°C, RC 1: +20°C/-55°C/+20°C/+10°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, RC 1: 20N for 5~10s
Clause 4.16.3 5N twice, RC 1: 10N
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 (RC 1 350°C for 3.0s)
Clause 4.19, 5 cycles between -55°C and 125°C,
RC 1: -55°C and +85°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
Variation of Resistance
with Temperature
Overload
See ratings table
∆R≤±(2%
+0.1 ohm) No visual damage,
legible marking
Tensile
∆R≤±(2%
+0.1 ohm) No visual damage
Bending
∆R≤±(2%
+0.1 ohm) No visual damage
Torsion
∆R≤±(2%
+0.1 ohm) No visual damage
In accordance with Clause 4.17.4.5
∆R≤±(3%
+0.1 ohm) No visual damage,
legible marking, RC 1 (5% +0.1 ohm)
∆R≤±(2%
+0.1 ohm), RC 1 (4% +0.1 ohm)
No visual damage
∆R≤±(10%
+0.5 ohm) Insulation resistance:
R≥100M ohm, No visual damage
∆R≤±(10%
+0.5 ohm) Insulation resistance:
R≥100M ohm, No visual damage, legible marking
∆R≤±(10%
+0.5 ohm) No visual damage
Insulation resistance: R≥1G ohm
∆R≤±(10%
+0.5 ohm) No visual damage
Insulation resistance: R≥1G ohm
Robustness of Terminations
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
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
1/04/05
KOA Speer Electronics, Inc.
• Bolivar Drive • P Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
.O.
95
resistors
