Document Number: 52009 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 05-Oct-09 171
Molded Metal Film Very High Stability (< 0.25 % after 1000 h)
and Precision (up to 0.1 %) Resistors
RCMA
Vishay Sfernice
FEATURES
•0.1 W to 2 W at 70 °C
•EN140-201
•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
•Compliant to RoHS directive 2002/95/EC
Note
• Undergoes European Quality Insurance System (CECC)
DIMENSIONS in millimeters
SERIES A
max. Ø B
max. Ø C WEIGHT
g
RCMA02 6.7 2.5 0.6 0.26
RCMA05 10.4 4.2 0.6 0.46
RCMA08 16.5 6.4 0.8 1.3
RCMA1 19.3 6.4 0.8 1.5
RCMA2 29 10.2 0.8 4.4
RCMA4 54 10.2 0.8 13
25 min. 25 min.A
Ø CØ B
TECHNICAL SPECIFICATIONS
VISHAY SFERNICE SERIES RCMA02 RCMA05 RCMA08 RCMA1 RCMA2 RCMA4
NF C 83-230 K4
RS58P
K4
RS63P RS68P ---
CECC 40 100-803 BECEDE---
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 to 332 kΩ10 Ω to 332 kΩ10 Ω to 1 MΩ10 Ω to 1 MΩ10 Ω to 1 MΩ10 Ω to 2.5 MΩ
± 0.5 % ± 1 % 1 Ω to 1 MΩ1 Ω to 1 MΩ1 Ω to 1.5 MΩ1 Ω to 2 MΩ1 Ω to 2.5 MΩ 1 Ω to 5 MΩ
K4 ± 0.1 % ± 0.2 % 10 Ω to 332 kΩ10 Ω to 332 kΩ10 Ω to 1 MΩ10 Ω to 1 MΩ10 Ω to 1 MΩ10 Ω to 2.5 MΩ
± 0.5 % ± 1 % 1 Ω to 1 MΩ1 Ω to 1 MΩ1 Ω to 1.5 MΩ1 Ω to 2 MΩ1 Ω to 2.5 MΩ1Ω to 5MΩ
K5 ± 0.1 % ± 0.2 % 10 Ω to 332 kΩ10 Ω to 332 kΩ10 Ω to 750 kΩ10 Ω to 750 kΩ10 Ω to 1 MΩ10 Ω to 2 MΩ
± 0.5 % ± 1 % 10 Ω to 1 MΩ10 Ω to 1 MΩ10 Ω to 1.5 MΩ10 Ω to 2 MΩ10 Ω to 2.5 MΩ10 Ω to 2.5 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 to + 155 °C K3 ≤ ± 50 ppm/°C K4 ≤ ± 25 ppm/°C
Typical in the range
0 °C to + 155 °C K5 ≤ ± 15 ppm/°C
Insulation Resistance > 107 MΩ
Voltage Coefficient 0.0001 %/V
Environmental Specifications - 65 °C/+ 155 °C/56 days
RCMA
Vishay Sfernice 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
172 Revision: 05-Oct-09
POWER RATING
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.
MARKING
Printed: Vishay Sfernice trademark, series, style (due to lack
of space RCMA02 is printed MA02), ohmic value (in Ω),
tolerance (in %), temperature coefficient, manufacturing
date.
PERFORMANCE
CECC 40 100 EN 140-201 TYPICAL VALUES
AND DRIFTS
TESTS CONDITIONS STD 202 REQUIREMENTS
Load Life at
Maximum Category Temperature 1000 h at 125 °C 50 % of Pn
≤ ± 1 %
Insulation resistance > 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 resistance > 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 resistance > 1 GΩ
± 0.25 % or 0.05 Ω
Insulation resistance 106 MΩ
Terminal Strength Pull - twist - 2 bends ≤ ± (0.25 % + 0.05 Ω) ± 0.05 % or 0.05 Ω
Vibration 10 Hz 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 resistance > 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 IN %
100
50
0
050 70 100 125 150
30
RATED POWER IN W
HOT SPOT TEMPERATURE IN °C
40
30
20
10
00 1 1.5
RCMA1
RCMA2
RCMA4
20.5
50
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 %
Document Number: 52009 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 05-Oct-09 173
RCMA
Molded Metal Film Very High Stability (< 0.25 % after 1000 h)
and Precision (up to 0.1 %) Resistors Vishay Sfernice
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 applicable.
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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therein, which apply to these products.
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