Ultra High Precision Bulk Metal® Z-Foil Technology Tubular
Axial Lead Resistors with TCR of ± 0.05 ppm/°C,
Tolerance to ± 0.01 % and Load Life Stability of ± 0.005 %
VTA52Z through VTA56Z, VMTA55Z, VMTB60Z (Z-Foil)
Vishay Foil Resistors
Document Number: 63163 For any questions, contact: foil@vishaypg.com www.foilresistors.com
Revision: 29-Mar-10 1
INTRODUCTION
This series of axial resistors uses the same Foil technology
as the Z201 but with axial leads instead of radial leads. Axial
leads have the advantage of using readily available auto
insertion equipment while the radial leaded devices may
require additional tooling. Also, when converting from metal
film (RNC 55) to Bulk Metal® Foil (VMTA55Z) boards may
already be laid out for the axial leaded device.
Our application engineering department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact us.
Note
(1) For non-standard requests, please contact application
engineering
FEATURES
Temperature coefficient of resistance (TCR):
(see table 1)
± 0.2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.)
± 0.05 ppm/°C typical (0 °C to + 60 °C)
Resistance range: 5 to 300 k
Vishay Foil resistors are not restricted to standard values;
specific “as required” values can be supplied at no extra
cost or delivery (e.g. 1K2345 vs. 1K)
Tolerance: to ± 0.01 %
Load life stability:
± 0.005 % (50 ppm) at 70 °C, 2000 h at rated power
Electrostatic discharge (ESD) up to 25 000 V
Power rating: 0.2 W to 1.0 W at 70 °C
Non-inductive, non-capacitive design (low noise)
Thermal EMF: 0.1 µV/°C maximum, 0.05 µV/°C typical
Voltage coefficient: < 0.1 ppm/V
Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
Terminal finish: lead (Pb)-free, tin/lead
Compliant to RoHS directive 2002/95/EC
For better performances, please contact application
engineering
Prototype quantities available in just 5 working days or
sooner. For more information, please contact
foil@vishaypg.com
* Pb containing terminations are not RoHS compliant, exemptions may apply
TABLE 1 - TYPICAL TCR ppm/°C AND
MAXIMUM SPREAD (1)
VALUES - 55 °C to + 125 °C, + 25 °C Ref.
5R to < 15R ± 0.2 ± 4.8
15R to < 25R ± 0.2 ± 3.8
25R to < 50R ± 0.2 ± 2.8
50R to < 100R ± 0.2 ± 2.3
> 100R ± 0.2 ± 1.8
FIGURE 1 - POWER DERATING CURVE
200 %
175 %
150 %
125 %
100 %
75 %
50 %
25 %
0- 75 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200
Ambient Temperature (°C)
Percent of Rated Power at + 125 °C
- 55 °C + 70 °C
Double Rated Power
Rated Power
Recommended
for operation
with < 150 ppm
ΔR after
2000 h load life
TABLE 2 - MODEL SELECTION
VISHAY
MODEL MIL STYLE POWER MAXIMUM
WORKING VOLTAGE
RESISTANCE
RANGE ()
TIGHTEST
TOLERANCE
at + 70 °C at + 125 °C
VTA56Z RBR56 0.25 W 0.125 W 300 V 5 to 24R9
25 to 100K ± 0.1 %
± 0.01 %
VTA55Z RBR55 0.3 W 0.15 W 300 V 5 to 24R9
25 to 100K ± 0.1 %
± 0.01 %
VTA54Z RBR54 0.5 W 0.25 W 300 V 5 to 24R9
25 to 200K ± 0.1 %
± 0.01 %
VTA53Z RBR53 0.66 W 0.33 W 300 V 5 to 24R9
25 to 200K ± 0.1 %
± 0.01 %
VTA52Z RBR52 1.0 W 0.5 W 300 V 5 to 24R9
25 to 300K ± 0.1 %
± 0.01 %
VMTA55Z RNC55 0.2 W 0.1 W 200 V 5 to 49R9
50 to 30K ± 0.1 %
± 0.01 %
VMTB60Z RNC60 0.25 W 0.125 W 250 V 5 to 49R9
50 to 60K ± 0.1 %
± 0.01 %
VTA52Z through VTA56Z, VMTA55Z, VMTB60Z (Z-Foil)
Vishay Foil Resistors
www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63163
2Revision: 29-Mar-10
FIGURE 2 - VTAZ/VMTAZ SERIES
STANDARD PRINTING
VTA52Z
0901
VISHAY
Model Number
VTA52Z
Resistance Value
200 kΩTolerance
200K00
0.02 %
Date Code
A
BD
C
09
year week
01
FIGURE 3 - TRIMMING TO VALUES
(conceptual illustration)
Mutual Inductance
Reduction due
to Change in
Current Direction
Current Path
Before Trimming
Note: Foil shown in black, etched spaces in white
Interloop Capacitance
Reduction in Series
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Current Path
After Trimming
TABLE 3 - VTAZ/VMTXZ DIMENSIONS
VISHAY
MODEL
MIL
SIZE
BODY LEAD
LENGTH (A) DIAMETER (B) LENGTH (C) DIAMETER (D)
INCH mm INCH mm INCH mm INCH mm
VTA56Z RBR56 0.356 9.04 0.260 6.60 1.5 min. 38.10 0.032 0.81
VTA55Z RBR55 0.500 ± 0.020 12.70 ± 0.51 0.260 6.60 1.5 min. 38.10 0.032 0.81
VTA54Z RBR54 0.750 19.05 0.260 6.60 1.5 min. 38.10 0.032 0.81
VTA53Z RBR53 0.750 ± 0.020 19.05 ± 0.51 0.375 ± 0.015 9.53 ± 0.38 1.5 min. 38.10 0.032 0.81
VTA52Z RBR52 1.000 25.40 0.375 ± 0.015 9.53 ± 0.38 1.35 min. 34.29 0.032 0.81
VMTA55Z RNC55 0.270 ± 0.005 6.86 ± 0.13 0.120 3.05 1.5 min. 38.10 0.025 0.64
VMTB60Z RNC60 0.375 ± 0.005 9.53 ± 0.13 0.160 ± 0.005 4.06 ± 0.13 1.5 min. 38.10 0.025 0.64
+ 0.005
- 0.010
--------------------
+ 0.13
- 0.25
----------------
+ 0.005
- 0.015
--------------------
+ 0.13
- 0.38
----------------
+ 0.005
- 0.010
--------------------
+ 0.13
- 0.25
----------------
+ 0.020
- 0.032
--------------------
+ 0.51
- 0.81
----------------
+ 0.005
- 0.010
--------------------
+ 0.13
- 0.25
----------------
+ 0.020
- 0.032
--------------------
+ 0.51
- 0.81
----------------
+ 0.005
- 0.010
--------------------
+ 0.13
- 0.25
----------------
FIGURE 4 - TYPICAL RESISTANCE/TEMPERATURE CURVE
+ 500
+ 200
+ 100
0
- 100
- 200
- 300
- 500
- 55 - 25 + 25 + 60 + 75 + 100 + 125
Ambient Temperature (°C) and TCR Chord Slopes for Different Temperature Ranges
ΔR
R
(ppm)
0
0.05 ppm/°C
- 0.1 ppm/°C 0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
- 0.16 ppm/°C
- 400
+ 300
+ 400
VTA52Z through VTA56Z, VMTA55Z, VMTB60Z (Z-Foil)
Vishay Foil Resistors
Document Number: 63163 For any questions, contact: foil@vishaypg.com www.foilresistors.com
Revision: 29-Mar-10 3
POST MANUFACTURING OPERATIONS OR PMO
Many analog applications can include requirements for
performance under conditions of stress beyond the normal
and over extended periods of time. This calls for more than
just selecting a standard device and applying it to a circuit.
The standard device may turn out to be all that is needed but
an analysis of the projected service conditions should be
made and it may well dictate a routine of stabilization known
as post manufacturing operations or PMO. The PMO
operations that will be discussed are only applicable to Bulk
Metal Foil resistors. They stabilize Bulk Metal Foil resistors
while they are harmful to other types. Short time overload,
accelerated load life, and temperature cycling are the three
PMO exercises that do the most to remove the anomalies
down the road. Vishay Bulk Metal Foil resistors are
inherently stable as manufactured. These PMO exercises
are only of value on Bulk Metal Foil resistors and they
improve the performance by small but significant amounts.
Users are encouraged to contact Vishay Foil applications
engineering for assistance in choosing the PMO operations
that are right for their application.
Note
(1) For non-standard requests, please contact application engineering.
TABLE 4 - GLOBAL PART NUMBER INFORMATION (1)
NEW GLOBAL PART NUMBER: Y009320K1230Q9L (preferred part number format)
DENOTES PRECISION VALUE CHARACTERISTICS
YR =
K = k
0 = standard
9 = lead (Pb)-free
1 to 999 = custom
PRODUCT CODE RESISTANCE TOLERANCE PACKAGING
0090 = VTA52Z
0091 = VTA53Z
0092 = VTA54Z
0093 = VTA55Z
0095 = VTA56Z
0096 = VMTA55Z
0097 = VMTB60Z
T= ± 0.01 %
Q= ± 0.02 %
A= ± 0.05 %
B= ± 0.1 %
C= ± 0.25 %
D= ± 0.5 %
F= ± 1.0 %
L = bulk
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0093 20K1230 Q 9 L:
TYPE: VTA55Z
VALUE: 20.123 k
ABSOLUTE TOLERANCE: ± 0.02 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk
0932 K120Y0 Q93 L0
Vishay Precision Group
Document No.: 63999
Revision: 27-Apr-2011
www.vishaypg.com
1
Legal Disclaimer Notice
Disclaimer
Legal Disclaimer Notice
Disclaimer
Document No.: 63999
Revision: 27-Apr-2011
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their
behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or
incompleteness contained herein or in any other disclosure relating to any product.
The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and
conditions of purchase, including but not limited to, the warranty expressed therein.
Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms
and conditions of purchase. To the maximum extent permitted by applicable law, Vishay Precision
Group disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and
all liability, including without limitation special, consequential or incidental damages, and (iii) any and
all implied warranties, including warranties of fitness for particular purpose, non-infringement and
merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different
applications and performance may vary over time. Statements regarding the suitability of products for
certain types of applications are based on Vishay Precision Group’s knowledge of typical requirements that
are often placed on Vishay Precision Group products. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular
application.
No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or
by any conduct of Vishay Precision Group.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless
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