UMA 0204
Vishay Beyschlag
High Precision MINI-MELF Resistor
FEATURES
Approved to EN 140401-803
Most advanced thin film technology
Superior overall stability
TCR down to ± 5 ppm/K
High precision tolerance down to 0.02 %
Matte Sn termination on Ni barrier layer
Compliant to RoHS Directive 2011/65/EU
APPLICATIONS
UMA 0204 high 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 high precision resistors. This
unique combination makes the product perfectly suited for all
applications with outstanding requirements towards reliable
precision and stability.
Measuring and calibration equipment
Industrial process control systems
Space and aircraft electronics
METRIC SIZE
DIN
CECC
0204
RC 3715M
TECHNICAL SPECIFICATIONS
DESCRIPTION
Metric CECC size
Resistance range
Resistance tolerance
Temperature coefficient
Operation mode
Rated dissipation,
P
70 (1)
Operating voltage,
U
max.
AC/DC
Permissible film temperature,
F
max.
Operating temperature range
Max. resistance change at
P
70
for resistance range,
R/R
max., after:
1000 h
8000 h
225 000 h
Permissible voltage against ambient (insulation):
1 min;
U
ins
Continuous
Failure rate: FIT
observed
300 V
75 V
0.1 x 10
-9
/h
0.02 %
0.05 %
0.15 %
85
°
C
- 10 °C to 85 °C
22
to 332 k
0.05 %
0.1 %
0.3 %
UMA 0204
RC 3715M
22
to 332 k
± 0.25 %; ± 0.1 %; ± 0.05 %; ± 0.02 %
± 15 ppm/K; ± 10 ppm/K; ± 5 ppm/K
Precision
0.07 W
200 V
125
°
C
- 55 °C to 125 °C
Standard
0.25 W
Notes
• These resistors do not feature a limited lifetime when operated within the permissible limits. However, resistance value drift increasing over
operating time may result in exceeding a limit acceptable to the specific application, thereby establishing a functional lifetime.
(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.
www.vishay.com
50
For technical questions, contact:
melf@vishay.com
Document Number: 28715
Revision: 20-Feb-12
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
UMA 0204
High Precision MINI-MELF Resistor
Vishay Beyschlag
DIMENSIONS
L
K
L
1
D
1
D
DIMENSIONS AND MASS
TYPE
UMA 0204
L
(mm)
3.6 + 0/- 0.2
D
(mm)
1.4 + 0/- 0.1
L
1 min.
(mm)
1.8
D
1
(mm)
D + 0/- 0.15
K
(mm)
0.8 ± 0.1
MASS
(mg)
22
Note
• Color code marking is applied according to IEC 60062
(3)
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 approximately 50 % wider than the other
bands. An interrupted band between the 4
th
and 5
th
full band indicates the temperature coefficient (orange = TC15, blue = TC10, violett = TC05).
PATTERN STYLES FOR MELF RESISTORS
G
Y
Z
X
RECOMMENDED SOLDER PAD DIMENSIONS
WAVE SOLDERING
TYPE
G
(mm)
1.5
Y
(mm)
1.5
X
(mm)
1.8
Z
(mm)
4.5
G
(mm)
1.7
REFLOW SOLDERING
Y
(mm)
1.2
X
(mm)
1.6
Z
(mm)
4.1
UMA 0204
Note
• The given solder pad dimensions reflect the considerations for board design and assembly as outlined e.g. in standards IEC 61188-5-x, or in
publication IPC-7351. They do not guarantee any supposed thermal properties, however, they will be found adequate for most general
applications.
Document Number: 28715
Revision: 20-Feb-12
For technical questions, contact:
melf@vishay.com
www.vishay.com
51
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
UMA 0204
Vishay Beyschlag
High Precision MINI-MELF Resistor
PART NUMBER AND PRODUCT DESCRIPTION
Part Number: UMA02040G4641AA300
U
TYPE/SIZE
UMA0204
M
A
0
2
0
4
0
G
4
6
4
1
A
A
3
0
0
VERSION
0
= Standard
TCR
G
= ± 5 ppm/K
F
= ± 10 ppm/K
E
= ± 15 ppm/K
RESISTANCE
3 digit value
1 digit multiplier
Multiplier
9
= *10
-1
0
= *10
0
1
= *10
1
2
= *10
2
3
= *10
3
TOLERANCE
H
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
PACKAGING
AU
A1
A3
A0
Product Description: UMA 0204 - 05 0.05 % AL 4K64
UMA
TYPE
UMA
0204
SIZE
0204
- 05
TCR
±
05
ppm/K
±
10
ppm/K
±
15
ppm/K
0.05 %
TOLERANCE
±
0.02
%
±
0.05
%
±
0.1
%
±
0.25
%
AL
PACKAGING
AU
A1
AL
A0
4K64
RESISTANCE
4K64
= 4.64 k
Notes
• Products can be ordered using either the PART NUMBER or the PRODUCT DESCRIPTION.
• The standard version includes approval to EN 140401-803, “Version A”, for selected ranges.
PACKAGING
TYPE
CODE
AU
UMA 0204
A1
A3 = AL
A0
QUANTITY
100
1000
3000
10 000
Antistatic blister tape
acc. IEC 60286-3
type II
8 mm
4 mm
CARRIER TAPE
WIDTH
PITCH
REEL DIAMETER
Box
180 mm/7"
330 mm/13"
TEMPERATURE COEFFICIENT AND RESISTANCE RANGE
DESCRIPTION
TCR
15 ppm/K
10 ppm/K
TOLERANCE
0.05 %
0.25 %
0.1 %
0.05 %
0.25 %
05 ppm/K
0.1 %
0.05 %
0.02 %
RESISTANCE
UMA 0204
47
to 332 k
22
to 332 k
43
to 332 k
75
to 221 k
33
to 221 k
56
to 221 k
75
to 150 k
75
to 100 k
Notes
• Resistance values to be selected from E192 series, for other values please contact the factory.
• TCR 10 and TCR 05 is specified over the temperature range from - 10 °C to + 85 °C.
• Approval to EN 140401-803, “Version A” is achieved for TCR 10 with 0.25 % and 0.1 %
www.vishay.com
52
For technical questions, contact:
melf@vishay.com
Document Number: 28715
Revision: 20-Feb-12
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
UMA 0204
High Precision MINI-MELF Resistor
Vishay Beyschlag
DESCRIPTION
Production 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 (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
(3)
. 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. This
includes pulse load screening (for
R
10
)
and additional
non-linearity screening (for
R
30
)
for the elimination of
products with a potential risk of early life failures according to
EN 140401-803, 2.1.2.2. Only accepted products are laid
directly into the antistatic blister tape in accordance with
IEC 60286-3, Type II
(3)
.
All products comply with the
GADSL
(1)
and the
CEFIC- EECA-EICTA
(2)
list of legal restrictions on
hazardous substances. This includes full compliance with
the following directives:
2000/53/EC End of Vehicle life Directive (ELV) and Annex II
(ELV II)
2011/65/EU Restriction of the
Substances Directive (RoHS)
use
of
Hazardous
2002/96/EC Waste Electrical and Electronic Equipment
Directive (WEEE)
APPROVALS
Where applicable the resistors are approved within the
IECQ-CECC Quality Assessment System for Electronic
Components to the detail specification
EN 140401-803
which refers to
EN 60115-1, EN 140400
and the variety of
environmental test procedures of the
IEC 60068
(3)
series.
Conformity is attested by the use of the
CECC
logo (
the mark of conformity on the package label.
) as
Vishay BEYSCHLAG has achieved
“Approval of
Manufacturer”
in accordance with
IEC QC 001002-3,
clause 2.
The release certificate for
“Technology Approval
Schedule”
in accordance with
CECC 240001
based on
IEC QC 001002-3, clause 6
is granted for the
Vishay BEYSCHLAG manufacturing process.
ASSEMBLY
The resistors are suitable for processing on automatic SMD
assembly systems. They are suitable for automatic soldering
using wave, reflow or vapour phase as shown in
IEC 61760-1
(3)
. Solderability is specified for 2 years after
production or requalification, however, excellent solderability
is proven after extended storage in excess of 10 years. The
permitted storage time is 20 years.
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.
The encapsulation is resistant to all cleaning solvents
commonly used in the electronics industry, including
alcohols, esters and aqueous solutions. The suitability of
conformal coatings, if applied, shall be qualified by
appropriate means to ensure the long-term stability of the
whole system.
RELATED PRODUCTS
For thin film products with a wider range or TCR, tolerance
and resistance, see this datasheets:
“Professional MELF Resistors”
(www.vishay.com/doc?28713)
“Precision MELF Resistors”
(www.vishay.com/doc?28714)
Notes
(1)
Global Automotive Declarable Substance List, see
www.gadsl.org.
(2)
CEFIC (European Chemical Industry Council), EECA (European Electronic Component Manufacturers Association), EICTA (European trade
organisation representing the information and communications technology and consumer electronics), see
www.eicta.org/index.php?id=995
issues
environment policy
chemicals
chemicals for electronics.
(3)
The quoted IEC standards are also released as EN standards with the same number and identical contents.
Document Number: 28715
Revision: 20-Feb-12
For technical questions, contact:
melf@vishay.com
www.vishay.com
53
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
实时操作系统RTOS
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
