RCMA
Vishay Sfernice
Molded Metal Film Very High Stability (< 0.25 % after 1000 h)
and Precision (up to 0.1 %) Resistors
FEATURES
•
0.1 W to 2 W at 70 °C
•
•
•
•
•
•
•
•
•
•
•
EN 140-201
CECC 40 100
Very high stability: drift < 0.25 % after 1000 h
Reduced total excursion: high initial precision (to ± 0.1 %)
with low temperature coefficient (down to ± 15 ppm/°C)
The models in this series are the first ones qualified by the
CNES for spatial applications (certificate N°4 dated
October 22, 1972)
Wide range ohmic values 1
Ω
to 5 MΩ
Accurate dimensions, high insulation and great
mechanical strength
High climatic performances: - 65 °C/+ 155 °C/56 days
Matching tolerance: 0.1 %
Tracking TCR: 5 ppm/°C
Termination: Pure Matte Tin
SERIES
DIMENSIONS
A max.
Ø B max.
ØC
Unit weight in g
RCMA RCMA RCMA RCMA RCMA RCMA
02
05
08
1
2
4
6.7
2.5
0.6
0.26
10.4
4.2
0.6
0.46
16.5
6.4
0.8
1.3
19.3
6.4
0.8
1.5
29
10.2
0.8
4.4
54
10.2
0.8
13
DIMENSIONS
in millimeters
25 min.
A
25 min.
ØB
ØC
TECHNICAL SPECIFICATIONS
VISHAY SFERNICE SERIES
NF C 83-230
CECC 40 100-803
Power Rating at 70 °C
Resistance
Value Range
in Relation to
- Tolerance
- Temperature
Coefficient
K3
± 0.2 %
± 0.5 % ± 1 %
± 0.1 % ± 0.2 %
± 0.5 % ± 1 %
± 0.1 % ± 0.2 %
± 0.5 % ± 1 %
10
Ω
1
Ω
10
Ω
1
Ω
10
Ω
10
Ω
RCMA 02
K4
RS58P
BE
0.125 W
332 kΩ 10
Ω
1 MΩ 1
Ω
332 kΩ 10
Ω
1 MΩ 1
Ω
332 kΩ 10
Ω
1 MΩ 10
Ω
RS63P
CE
0.250 W
332 kΩ 10
Ω
1 MΩ 1
Ω
332 kΩ 10
Ω
1 MΩ 1
Ω
332 kΩ 10
Ω
1 MΩ 10
Ω
RCMA 05
K4
RS68P
DE
0.500 W
1.5 MΩ 1
Ω
1 MΩ 10
Ω
1.5 MΩ 1
Ω
750 kΩ 10
Ω
1.5 MΩ 10
Ω
1 MΩ 10
Ω
RCMA 08
RCMA 1
-
-
0.75 W
1 MΩ 10
Ω
2 MΩ 1
Ω
1 MΩ 10
Ω
2 MΩ 1
Ω
750 kΩ 10
Ω
2 MΩ 10
Ω
RCMA 2
-
-
1W
1 MΩ 10
Ω
2.5 MΩ
1
Ω
1 MΩ 10
Ω
2.5 MΩ 1Ω
1 MΩ 10
Ω
2.5 MΩ 10
Ω
RCMA 4
-
-
2W
2.5 MΩ
5 MΩ
2.5 MΩ
5MΩ
2 MΩ
2.5 MΩ
K4
K5
Maximum Voltage
Critical Resistance
Temperature
Coefficient
rated in the range
- 55 °C/+ 155 °C
typical in the range
0 °C+ 155 °C
300 V
720 kΩ
350 V
490 kΩ
K3
≤
± 50 ppm/°C
400 V
320 kΩ
500 V
333 kΩ
600 V
360 kΩ
K4
≤
± 25 ppm/°C
800 V
320 kΩ
K5
≤
± 15 ppm/°C
> 10
7
MΩ
0.0001 %/V
- 65 °C/+ 155 °C/56 days
Insulation Resistance
Voltage Coefficient
Environmental Specifications
Undergoes European Quality Insurance System (CECC)
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31
For technical questions, contact: sfer@vishay.com
Document Number: 52009
Revision: 23-Sep-08
RCMA
Molded Metal Film Very High Stability (< 0.25 % after 1000 h)
Vishay Sfernice
and Precision (up to 0.1 %) Resistors
PERFORMANCE
CECC 40 100
TESTS
Load Life at max. Category Temperature
Short Time Overload
Damp Heat Humidity
(Steady State)
Rapid Temperature Change
Climatic Sequence
Terminal Strength
Vibration
Soldering (Thermal Shock)
Load Life
Shelf Life
EN 140-201
CONDITIONS STD 202
1000 h at 125 °C 50 % of Pn
2.5 Um/5 s
limited to 2 Un
56 days
with low load
- 55 °C
- 65 °C
+ 155 °C
+ 155 °C
REQUIREMENTS
≤
±1%
Insulation resist. > 1 GΩ
≤
± (0.25 % + 0.05
Ω)
≤
± (1 % + 0.05
Ω)
Insulation resist. > 1 GΩ
≤
± (0.25 % + 0.05
Ω)
≤
± (1 % + 0.05
Ω)
Insulation resist. > 1 GΩ
≤
± (0.25 % + 0.05
Ω)
≤
± (0.25 % + 0.05
Ω)
≤
± (0.25 % + 0.05
Ω)
≤
± (1 % + 0.05
Ω)
Insulation resist. > 1 GΩ
-
TYPICAL VALUES
AND DRIFTS
± 0.25 % or 0.05
Ω
± 0.1 % or 0.05
Ω
± 0.2 % or 0.05
Ω
± 0.1 % or 0.05
Ω
± 0.25 % or 0.05
Ω
Insulation resist. 10
6
MΩ
± 0.05 % or 0.05
Ω
± 0.05 % or 0.05
Ω
± 0.05 % or 0.05
Ω
± 0.1 % or 0.05
Ω
± 0.1 % or 0.05
Ω
Pull - Twist - 2 bends
10 to 500 Hz
+ 260 °C 10 s
cycle 90’/30’
1000 h at Pn at 70 °C
1 year
ambient temperature
POWER RATING CHART
100
PRACTICAL OPERATING TOLERANCES
Table 2 and 3 show the basic characteristics and maximum
values under different stresses. In fact, the values and drifts
are maintained to within narrower limits.
K5
≤
± 10 ppm/°C
K4
≤
± 15 ppm/°C
1000 h at Pr
10 000 h at Pr
± 0.05 %
± 0.15 %
% RATED POWER
Temperature coefficient
between - 10 °C and + 70 °C
50
LONG LIFE
90’/30’ cycles
ambient temperature 70 °C
So, in operation under the specified conditions (Pr at 70 °C)
the total drift (load life + TCR) of a RCMA K4 does not exceed
± 0.25 %.
0
0
30
50
70
100
125
150
AMBIENT TEMPERATURE IN °C
SPECIAL APPLICATIONS
Temperature coefficient tracking to 5 ppm/°C.
Tolerance matching to 0.05 %.
Selection of positive or negative TCR in temperature range
of - 20 °C to + 125 °C.
For these applications and other requirements consult
VISHAY SFERNICE.
TEMPERATURE RISE
HOT SPOT TEMPERATURE IN °C
40
MA
RC
4
30
M
RC
A2
20
R
C
M
A
1
10
0
0
0.5
1
1.50
2
RATED POWER IN WATT
Document Number: 52009
Revision: 23-Sep-08
For technical questions, contact: sfer@vishay.com
www.vishay.com
32
RCMA
Vishay Sfernice
Molded Metal Film Very High Stability (< 0.25 % after 1000 h)
and Precision (up to 0.1 %) Resistorss
MARKING
Printed: SFERNICE trademark, series, style (due to lack of space RCMA 02 is printed MA 02), ohmic value (in
Ω),
tolerance
(in %), temperature coefficient, manufacturing date.
GLOBAL PART NUMBER INFORMATION
R
C
M
A
0
2
1
3
0
0
1
F
H
S
1
4
GLOBAL
MODEL
RCMA
SIZE
02
05
08
10
20
40
SPECIAL
As applicacable.
Contact us.
OHMIC VALUE
The first four digits are
significant figures and the
last digit specifies the
number of zeros to follow.
R
designates
decimal
point.
13001
= 13 kΩ
33001
= 33 kΩ
220R0
= 220
Ω
1R220
= 1.22
Ω
TOLERANCE
B
= 0.1 %
A
= 0.2 %
D
= 0.5 %
F
=1%
TEMPERATURE
COEFFICIENT
H
= K3, 50 ppm/K
E
= K4, 25 ppm/K
D
= K5, 15 ppm/K
PACKAGING
AM500 =
A20
BAG100 =
S14
BAG50 =
S09
BAG10 =
S03
BO50* =
B25
*: possible in
N/A
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33
For technical questions, contact: sfer@vishay.com
Document Number: 52009
Revision: 23-Sep-08
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
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Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
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