Ultra Precision MELF Resistor
UMA 0204
Vishay Beyschlag
Document Number: 28715
for technical questions contact: ff3bresistors@vishay.com
www.vishay.com
Revision: 25-Feb-04
1
FEATURES
Most advanced thin film technology
T.C.R. down to 5 ppm/K
Ultra precision tolerance down to 0.02 %
Superior overall stability
Green product, supports lead-free soldering
Approved according to EN 140401-803.
APPLICATIONS
Measuring and calibration equipment
Industrial process control systems
Space and aircraft electronics
UMA 0204 ultra precision thin film MINI-MELF resistors
combine the proven reliability of professional MELF products
with a most advanced level of precision and stability first
achieved with axial thin film ultra precision resistors. This
unique combination makes the product perfectly suited for all
applications with outstanding requirements towards reliable
precision and stability.
METRIC SIZE
DIN:
0204
CECC:
RC 3715M
Note
1. The power dissipation on the resistor generates a temperature rise against the local ambient, depending on the heatflow support of the
printed-circuit board (thermal resistance). The rated dissipation applies only if the permitted film temperature is not exceeded.
TECHNICAL SPECIFICATIONS
DESCRIPTION
UMA 0204
Metric CECC size
RC 3715M
Resistance range
22
to 332 k
Resistance tolerance
0.25 %; 0.1 %; 0.05 %; 0.02 %
Temperature coefficient
15 ppm/K; 10 ppm/K;
05 ppm/K
Operation mode
precision
standard
Climatic category (LCT/UCT/days)
10/85/56
55/125/56
Rated dissipation,
P
70
(1)
0.07 W
0.25 W
Operating voltage,
U
max
AC/DC
200 V
Film temperature
85
C
125
C
Max. resistance change at
P
70
for resistance range,
R
/
R
max., after:
22
to 332 k
1000 h
0.02 %
0.05 %
8000 h
0.05 %
0.1 %
225000 h
0.15 %
0.3 %
Specified lifetime
225000 h
Permissible voltage against ambient (insulation):
1 minute;
U
ins
300 V
continuous
75 V
Failure rate
0.7
10
-9
/h
UMA 0204
Vishay Beyschlag
Ultra Precision MELF Resistor
www.vishay.com
For technical questions contact: ff3bresistors@vishay.com
Document Number: 28715
2
Revision: 25-Feb-04
DIMENSIONS
ORDERING INFORMATION -
type description and ordering code
U
M
A
0204
-05
0.05 %
AL
4 K 75
FILM TYPE
PRODUCT
CODE
SIZE CODE
METRIC DIN
SIZE
TEMPERATURE
COEFFICIENT
TOLERANCE
PACKAGING
RESISTANCE
VALUE
U = Ultra
precision
M = MELF,
cylindrical
A = 0204
0204
15 ppm/K
10 ppm/K
05 ppm/K
0.25 %
0.1 %
0.05 %
0.02 %
AU = 100 units
A1 = 1000 units
AL = 3000 units
A0 = 10000 units
See temperature
Coefficient and
Resistance Range
Table
L
D
L 1
K
D1
Color code marking
(1)
Note
1. Color code marking is applied according to IEC 60062 in five bands. Each color band appears as a single solid line, voids are permissible if
at least 2/3 of the band is visible from each radial angle of view. The last color band for tolerance is approx. 50 % wider than the other bands.
An interrupted band between the 4th and 5th full band indicates the temperature coefficient.
DIMENSIONS
- MELF resistor type, mass and relevant physical dimensions
TYPE
L
(mm)
D
(mm)
L
1 min
(mm)
D
1
(mm)
K
(mm)
MASS
(mg)
UMA 0204
3.6 + 0/
-
0.2
1.4 + 0/
-
0.1
1.8
D + 0/
-
0.15
0.8
0.1
19
Notes
1. Resistance values to be selected from E192 series, for other values please contact the factory.
2. TC10 and TC05 is specified over the temperature range from
-
10 C to + 85 C.
TEMPERATURE COEFFICIENT AND RESISTANCE RANGE
DESCRIPTION
RESISTANCE VALUE
(1)
T.C.
TOLERANCE
UMA 0204
15 ppm/K
0.05 %
47
to 332 k
10 ppm/K
(2)
0.25 %
22
to 332 k
0.1 %
43
to 332 k
0.05 %
75
to 221 k
05 ppm/K
(2)
0.25 %
33
to 221 k
0.1 %
56
to 221 k
0.05 %
75
to 150 k
0.02 %
75
to 100 k
UMA 0204
Ultra Precision MELF Resistor
Vishay Beyschlag
Document Number: 28715
For technical questions contact: ff3bresistors@vishay.com
www.vishay.com
Revision: 25-Feb-04
3
DESCRIPTION
P
roduction is strictly controlled and follows an extensive set
of instructions established for reproducibility. A
homogeneous film of metal alloy is deposited on a high grade
ceramic body (85 % Al
2
O
3
) and conditioned to achieve the
desired temperature stability. Nickel plated steel
terminations are firmly pressed on the metallised rods. A
special laser is used to achieve the target value by smoothly
cutting in the resistive layer without damaging the ceramics.
A further conditioning is applied in order to stabilise the
trimming result. The resistor elements are covered by a
protective coating designed for electrical, mechanical and
climatic protection. The terminations receive a final pure tin
on nickel plating. Five colour rings designate the resistance
value and tolerance in accordance with
IEC 60062
.
Additional colour dots near the fourth ring are used to identify
the temperature coefficient.
The result of the determined production is verified by an
extensive testing procedure under strict temperature control,
performed on 100 % of the individual resistors. Only
accepted products are laid directly into the antistatic blister
tape in accordance with
IEC 60286-3
.
ASSEMBLY
The resistors are suitable for processing on automatic SMD
assembly systems. They are suitable for automatic soldering
using reflow or vapour phase. Excellent solderability is
proven, even after extended storage in excess of 10 years.
The encapsulation is resistant to all cleaning solvents
commonly used in the electronics industry, including
alcohols, esters and aqueous solutions.The resistors are
completely lead (Pb)-free, the pure tin plating provides
compatibility with lead (Pb)-free soldering processes. The
immunity of the plating against tin whisker growth has been
proven under extensive testing. All products comply with the
CEFIC-EECA-EICTA list of legal restrictions on hazardous
substances. This includes full compatibility with the
European RoHS directive.
APPROVALS
The resistors are tested in accordance with
EN 140401-803
which refers to
EN 60115-1, EN 140400
and the variety of
enviromental test procedures of the
IEC 60068
series.
Approval of conformity is indicated by the
CECC
logo on the
package label.
Vishay BEYSCHLAG has achieved
"Approval of
Manufacturer"
in accordance with
EN 100114-1
. The
release certificate for
"Technology Approval Schedule"
in
accordance with
CECC 240001
based on
EN 100114-6
is
granted for the Vishay BEYSCHLAG manufacturing process.
UMA 0204
Vishay Beyschlag
Ultra Precision MELF Resistor
www.vishay.com
For technical questions contact: ff3bresistors@vishay.com
Document Number: 28715
4
Revision: 25-Feb-04
FUNCTIONAL PERFORMANCE
UMA 0204
0.1
0.2
W
Power Dissipation
P
C
100
150
-50
0
50
70
Ambient Temperature
amb
0
Derating - Precision Operation
UMA 0204
0
0.2
0.4
W
Power Dissipation
P
C
100
150
-50
0
50
70
Ambient Temperature
amb
Derating - Standard Operation
UMA 0204
Current Noise
A
1
0.1
1
V/V
Resistance Value
R
1 k
10 k
100 k
1 M
10 M
0.01
In accordance with IEC 60 195
Current Noise A
1
UMA 0204
Ultra Precision MELF Resistor
Vishay Beyschlag
Document Number: 28715
For technical questions contact: ff3bresistors@vishay.com
www.vishay.com
Revision: 25-Feb-04
5
TESTS AND REQUIREMENTS
All tests are carried out in accordance with the following
specifications:
EN 60115-1, generic specification
EN 140400, sectional specification
EN 140401-803, detail specification
The components are approved in accordance with the
IECQ-CECC-system, where applicable. For the full test
schedule refer to the documents listed above. The testing
also covers most of the requirements specified by
EIA/IS-703 and JIS-C-5202.
The tests are carried out in accordance with IEC 60068 and
under standard atmospheric conditions in accordance with
IEC 60068-1, 5.3. Climatic category LCT/UCT/56 (rated
temperature range: Lower Category Temperature, Upper
Category Temperature; damp heat, long term, 56 days) is
valid.
Unless otherwise specified the following values apply:
Temperature: 15 C to 35 C
Relative humidity: 45 % to 75 %
Air pressure: 86 kPa to 106 kPa (860 mbar to1 060 mbar).
The components are mounted for testing on printed-circuit
boards in accordance with EN 140400, 2.3.3, unless
otherwise specified.
The requirements stated below are based on the required
tests and permitted limits of EN 140401-803. However,
some additional tests and a number of improvements
against those minimum requirements have been included.
The stated requirements for long-term tests are typically
fulfilled with a statistical safety of at least +5 s.
x
TEST PROCEDURES AND REQUIREMENTS
EN
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST
PROCEDURE
REQUIREMENTS
PERMISSIBLE CHANGE (
R
/
R
)
STABILITY
CLASS 0.05
OR BETTER
STABILITY
CLASS 0.1
OR BETTER
STABILITY
CLASS 0.25
OR BETTER
stability for product types:
UMA 0204
100 to 100 k
43 to 221 k
22 to 332 k
4.5
-
resistance
-
0.25 %; 0.1 %; 0.05 %; 0.02 %;
4.8.4.2
-
temperature
coefficient
at 20 / -10 / 20 C
and 20 / 85 / 20 C
10 ppm/K; 05 ppm/K
at 20 / -55 / 20 C
and 20 / 125 / 20 C
15 ppm/K
4.25.1
-
endurance at
70 C:
precision operation
U =
U
max
;
1.5 h on; 0.5 h off;
70 C; 1000 h
(0.02 %R + 1 m)
70 C; 8000 h
(0.05 %R + 1 m)
endurance at
70 C:
standard operating
U =
U
max
;
1.5 h on; 0.5 h off;
mode
70 C; 1000 h
(0.05 %R + 1 m)
70 C; 8000 h
(0.1 %R + 1 m)
4.25.3
-
endurance at
upper category
temperature
85 C; 1000 h
(0.01 %R + 1 m) (0.05 %R + 1 m) (0.1 %R + 1 m)
125 C; 1000 h
(0.05 %R + 1 m)
(0.1 %R + 1 m)
(0.15 %R + 1 m)
4.24
78 (Cab)
damp heat, steady
state
(40 2) C; 56 days;
(93 3) % RH
(0.03 %R + 1 m) (0.05 %R + 1 m) (0.1 %R + 1 m)
P
70
R
P
70
R
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