Molded Metal Film Very High Stability (< 0.25 % after 1000 h)
and Precision (up to 0.1 %) Resistors
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 52009
31 Revision: 23-Sep-08
RCMA
Vishay Sfernice
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
DIMENSIONS in millimeters
Undergoes European Quality Insurance System (CECC)
25 min. 25 min.A
Ø CØ B
DIMENSIONS
SERIES
RCMA
02
RCMA
05
RCMA
08
RCMA
1
RCMA
2
RCMA
4
A max. 6.7 10.4 16.5 19.3 29 54
Ø B max. 2.5 4.2 6.4 6.4 10.2 10.2
Ø C 0.6 0.6 0.8 0.8 0.8 0.8
Unit weight in g 0.26 0.46 1.3 1.5 4.4 13
TECHNICAL SPECIFICATIONS
VISHAY SFERNICE SERIES RCMA 02 RCMA 05 RCMA 08 RCMA 1 RCMA 2 RCMA 4
NF C 83-230 K4
RS58P
K4
RS63P RS68P ---
CECC 40 100-803 BE CE DE - - -
Power Rating at 70 °C 0.125 W 0.250 W 0.500 W 0.75 W 1 W 2 W
Resistance
Value Range
in Relation to
- Tolerance
- Temperature
Coefficient
K3 ± 0.2 % 10 Ω 332 kΩ10 Ω 332 kΩ10 Ω1 MΩ10 Ω1 MΩ10 Ω1 MΩ10 Ω 2.5 MΩ
± 0.5 % ± 1 % 1 Ω1 MΩ1 Ω1 MΩ1 Ω 1.5 MΩ1 Ω 2 MΩ1 Ω 2.5 MΩ 1 Ω 5 MΩ
K4 ± 0.1 % ± 0.2 % 10 Ω 332 kΩ10 Ω 332 kΩ10 Ω1 MΩ10 Ω1 MΩ10 Ω 1 MΩ10 Ω 2.5 MΩ
± 0.5 % ± 1 % 1 Ω 1 MΩ1 Ω 1 MΩ1 Ω 1.5 MΩ1 Ω 2 MΩ1 Ω 2.5 MΩ1Ω 5MΩ
K5 ± 0.1 % ± 0.2 % 10 Ω 332 kΩ10 Ω 332 kΩ10 Ω 750 kΩ10 Ω 750 kΩ10 Ω 1 MΩ10 Ω 2 MΩ
± 0.5 % ± 1 % 10 Ω 1 MΩ10 Ω 1 MΩ10 Ω 1.5 MΩ10 Ω 2 MΩ10 Ω 2.5 MΩ10 Ω2.5 MΩ
Maximum Voltage 300 V 350 V 400 V 500 V 600 V 800 V
Critical Resistance 720 kΩ490 kΩ320 kΩ333 kΩ360 kΩ320 kΩ
Temperature
Coefficient
rated in the range
- 55 °C/+ 155 °C K3 ≤ ± 50 ppm/°C K4 ≤ ± 25 ppm/°C
typical in the range
0 °C+ 155 °C K5 ≤ ± 15 ppm/°C
Insulation Resistance > 107 MΩ
Voltage Coefficient 0.0001 %/V
Environmental Specifications - 65 °C/+ 155 °C/56 days
RCMA
Molded Metal Film Very High Stability (< 0.25 % after 1000 h)
and Precision (up to 0.1 %) Resistors Vishay Sfernice
Document Number: 52009 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 23-Sep-08 32
POWER RATING CHART
TEMPERATURE RISE
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.
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 %.
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.
PERFORMANCE
CECC 40 100 EN 140-201 TYPICAL VALUES
AND DRIFTS
TESTS CONDITIONS STD 202 REQUIREMENTS
Load Life at max. Category Temperature 1000 h at 125 °C 50 % of Pn ≤ ± 1 %
Insulation resist. > 1 GΩ± 0.25 % or 0.05 Ω
Short Time Overload 2.5 Um/5 s
limited to 2 Un ≤ ± (0.25 % + 0.05 Ω) ± 0.1 % or 0.05 Ω
Damp Heat Humidity
(Steady State)
56 days
with low load
≤ ± (1 % + 0.05 Ω)
Insulation resist. > 1 GΩ± 0.2 % or 0.05 Ω
Rapid Temperature Change - 55 °C + 155 °C ≤ ± (0.25 % + 0.05 Ω) ± 0.1 % or 0.05 Ω
Climatic Sequence - 65 °C + 155 °C ≤ ± (1 % + 0.05 Ω)
Insulation resist. > 1 GΩ
± 0.25 % or 0.05 Ω
Insulation resist. 106 MΩ
Terminal Strength Pull - Twist - 2 bends ≤ ± (0.25 % + 0.05 Ω) ± 0.05 % or 0.05 Ω
Vibration 10 to 500 Hz ≤ ± (0.25 % + 0.05 Ω) ± 0.05 % or 0.05 Ω
Soldering (Thermal Shock) + 260 °C 10 s ≤ ± (0.25 % + 0.05 Ω) ± 0.05 % or 0.05 Ω
Load Life cycle 90’/30’
1000 h at Pn at 70 °C
≤ ± (1 % + 0.05 Ω)
Insulation resist. > 1 GΩ± 0.1 % or 0.05 Ω
Shelf Life 1 year
ambient temperature - ± 0.1 % or 0.05 Ω
AMBIENT TEMPERATURE IN °C
% RATED POWER
100
50
0
050 70 100 125 150
30
RATED POWER IN WATT
HOT SPOT TEMPERATURE IN °C
40
30
20
10
0
0 1 1.50
RCMA1
RCMA2
RCMA4
20.5
Temperature coefficient
between - 10 °C and + 70 °C
K5 ≤ ± 10 ppm/°C
K4 ≤ ± 15 ppm/°C
LONG LIFE
90’/30’ cycles
ambient temperature 70 °C
1000 h at Pr ± 0.05 %
10 000 h at Pr ± 0.15 %
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 52009
33 Revision: 23-Sep-08
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
GLOBAL
MODEL SIZE SPECIAL OHMIC VALUE TOLERANCE TEMPERATURE
COEFFICIENT PA C K AG I N G
RCMA 02
05
08
10
20
40
As applicacable.
Contact us.
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
B = 0.1 %
A = 0.2 %
D = 0.5 %
F = 1 %
H = K3, 50 ppm/K
E = K4, 25 ppm/K
D = K5, 15 ppm/K
AM500 = A20
BAG100 = S14
BAG50 = S09
BAG10 = S03
BO50* = B25
*: possible in
N/A
A02 130 1 H 1C MR 0FS4
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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