FRST es Foilechnology) Foil 1206, 2010,
FRST Series (Z1 0805,Technology)
Seri (Z1 T
(0603,
1506, 2512)
(0603, 0805, 1206, 1506, 2010, 2512)
Ultra High-Precision Foil Wraparound Surface Mount Chip Resistor
for High Temperature Applications up to +200°C,
Humidity Proof (85°C/85% RH) to 0.005%, Stability Under Load of 0.02%
FEATURES
•
Humidity test: 85°C/85% RH, 1000 hrs to ∆R 0.005%,
typical
• Temperature coefficient of resistance (TCR):
2.5 ppm/°C typical (–55°C to +175°C, +25°C ref.)
• Resistance range: 5
Ω
to 125 kΩ (for higher and lower
values, please contact us)
• Resistance tolerance: to ±0.01%
• Power coefficient “∆R due to self heating”:
5 ppm at rated power
• Power rating: to 750 mW at +70°C
to 150 mW at +175°C
•
Load life stability: ±0.005% typical at 70°C (2000 h,
rated power)
•
Stability under load: 0.02% at +175 °C (2000 h,
derated power)
• Bulk Metal Foil resistors are not restricted to standard
values; we can supply specific “as required” values at
no extra cost or delivery (e.g., 1K2345 vs. 1K)
• Thermal stabilization time <1 s (nominal value achieved
within 10 ppm of steady state value)
•
Electrostatic discharge (ESD) at least to 25 kV
• Short time overload: 0.005%
• Rise time: 1 ns effectively no ringing
• Current noise: 0.010 μV
RMS
/V of applied voltage
(<–40 dB)
• Voltage coefficient: 0.1 ppm/V
• Non inductive: 0.08 μH
• Non hot spot design
• Terminal finish available: lead (Pb)-free only
• Matched sets are available on request
• For higher temperature application up to +240°C and
for better performances, contact foil@vpgsensors.com
Top View
INTRODUCTION
The FRST is based on the new generation Z1 Foil
Technology of Bulk Metal
®
Foil resistor elements from
VPG, which makes these resistors virtually insensitive to
destabilizing factors. Their element, based on the new Z1
Foil Technology is a solid alloy that displays the desirable
bulk properties of its parent material; thus, it is inherently
stable (less than 0.02% ∆R after 2,000 hrs, derated power
at +175°C), noise-free and withstands ESD to 25 kV or
more. The alloy is matched to the substrate and forms a
single entity with balanced temperature characteristics for
an unusually low and predictable TCR over a wide range
from –55C° to more than 175°C. Resistance patterns are
photo-etched to permit trimming of resistance values to
very tight tolerances.
The FRST series has a full wraparound termination, and
was especially designed for applications up to +200°C.
The FRST is available in any value within the
specified resistance range. The VFR application
engineering department is available to advise and
make recommendations. For non-standard technical
requirements and special applications, please contact us
using the e-mail address in the footer below.
Figure 1—Power Derating Curve
125
Table 1—Tolerance and TCR vs. Resistance
Value
(1)
(–55°C to +175°C, +25°C Ref.)
Resistance Value
(Ω)
250 to 125k
100 to <250
50 to <100
25 to <50
10 to <25
5 to <10
(2)
Tolerance
(%)
±0.01%
±0.02%
±0.05%
±0.1%
±0.25%
±0.5%
Typical TCR
(ppm/°C)
Rated Power (%)
100
75
50
25
0
–75
–55°C
+70°C
±2.5
–50
–25
0
+25 +50
+75 +100 +125 +150 +175 +200 +225
Ambient Temperature (°C)
Notes
(1)
For tighter performances and non-standard values lower
than 5 Ω and above 125 kΩ, please contact VFR application
engineering using the e-mail address in the footer below.
(2)
TCR of these low value range : ±10 ppm/°C max
www.vishayfoilresistors.com
1
Document No.: 63235
Revision: 09-Oct-2015
For any questions, contact
foil@vpgsensors.com
FRST Series (Z1 Foil Technology)
FRST es Foilechnology) 0805, 1506, 2512)
Seri (Z1 T
(0603, 1206, 2010,
(0603, 0805, 1206, 1506, 2010, 2512)
HIGH TEMPERATURE PRODUCTS
Resistors are the passive building blocks of an electrical
circuit. They may be used for dropping the voltage,
buffering the surge when the circuit is turned on,
providing feedback in a monitoring loop, sensing current
flow, etc. When the application requires stability over
time and load, initial accuracy, minimal change with
temperature for more than 200°C, resistance to moisture
and a number of other characteristics that will be
described below, the Z1 Foil Technology products have
the attributes needed for such application. Over the past
few months, there has been considerable growth in the
demand for precise, stable and reliable resistors that can
operate in harsh environments such as 85°C/85% RH and
especially at high temperatures to 200°C. Many analog
circuits for industrial, military, aerospace, medical, down-
hole, oil well and automotive applications require passive
components such as resistors to have a minimal drift
from their initial values when operating above +175°C and
in humid environments. In these applications, the most
important factor is the temperature dependence and the
end of life tolerance (which is part of the stability) and to a
lesser extent, the initial tolerance.
The Z1 Foil Technology resistors provide stabilities
well under the maximum allowable drift required by
customers’ specifications through thousands of hours of
operation under harsh conditions, such as the extreme
temperatures and radiation-rich environments of down-
hole oil-well logging applications, in the frigid arctic, under
the sea or in deep space. All Bulk Metal Foil resistors
receive stabilization processing, such as repetitive
short term power overloads, to assure reliable service
through the unpredictable stresses of extreme operation.
Compared to Bulk Metal Foil, thick and thin film resistor
elements are produced with a non-controllable material.
Heat or mechanical stresses on the resistive elements
cause the particles forming the film to expand. However,
after these stresses are alleviated, the articles in the film
matrix do not return to the exact original position. That
degenerates their overall stability.
VPG's ultra high precision Bulk Metal Foil technology
includes many types of resistors with a variety of standard
configurations that can withstand unconventional
environmental conditions above and below the earth’s
surface using special post manufacturing operations
specially developed for this purpose. The stability of a
resistor depends primarily on its history of exposures to
high temperature. Stability is affected by:
1. Changes in the ambient temperature and heat from
adjacent components (defined by the temperature
coefficient of resistance, or TCR)
2. Destabilizing thermal shock of suddenly-applied power
(defined by the power coefficient of resistance, or PCR)
3. Long-term exposure to applied power (load-life
stability)
4. Repetitive stresses from being switched on and off
In very high-precision resistors that need to operate in
an environment with temperatures above +175°C, these
effects must be taken into account to achieve high
stability with changes in load (Joule Effect) and ambient
temperature.
The Z1 Foil Technology provides an order of magnitude
reduction in the Bulk Metal Foil element’s sensitivity to
temperature changes—both external and internal—with
emphasis on long-term stability in high temperature
environments.
In order to take full advantage of the low TCR and long-
term stability improvement, it is necessary to take into
account the differences in the resistor’s response to each
of the above-mentioned effects. As described below, new
products have been developed to successfully deal with
these factors. For high temperature applications where
stability and total error budget is the main concern, the
new generation of Vishay Foil resistors offers the best
resilience against time at elevated temperature.
The Z1 Foil Technology allows us to produce customer-
oriented products designed to satisfy unique and specific
technical requirements. In addition to the special chip
stabilization under extreme environment conditions in the
production line, we offer additional specially oriented post
manufacturing operations (PMO) for high temperature
applications that require an even higher degree of
reliability and stability.
Electrostatic discharge (ESD) is another potential problem
that can cause unpredictable failure in high temperature
applications that increase the sensitivity of the resistors to
ESD.
ESD damage to electronic devices can occur at any
point in the device’s life cycle, from manufacturing to
field service. A resistor that is exposed to an ESD event
may fail immediately or may experience a latent defect.
With latent defects, premature failure can occur after
the resistor is already functioning in the finished product
after an unpredictable length of service. Bulk Metal
Foil resistors are capable of withstanding electrostatic
discharges at least to 25 kV without degradation.
The VFR Application Engineering department is always
available to assist with any special requirements you
might have. If you are not sure which resistor best suits
your needs, please do not hesitate to contact them for
more information: foil@vpgsensors.com
www.vishayfoilresistors.com
2
For any questions, contact
foil@vpgsensors.com
Document No.: 63235
Revision: 09-Oct-2015
FRST es Foilechnology) Foil 1206, 2010,
FRST Series (Z1 0805,Technology)
Seri (Z1 T
(0603,
1506, 2512)
(0603, 0805, 1206, 1506, 2010, 2512)
Figure 2—Trimming to Values
(conceptual illustration)
Interloop
capacitance
reduction
in series
Mutual
inductance
reduction
due to change
in current
direction
Current path
before trimming
Current path after trimming
Table 2—Specifications
Rated
Derated
Max.
Resistance
Chip Power at Power at Working
Range
Size
+70°C
+175°C
Voltage
(Ω)
(mW)
(mW)
(≤√P
×
R
)
0603*
0805
1206
1506
2010
2512
100
200
300
300
500
750
20
40
60
60
100
150
22 V
40 V
87 V
95 V
187 V
220 V
100 to 4k*
5 to 8k
5 to 25k
5 to 30k
5 to 70k
5 to 125k
Max.
Weight
(mg)
4
6
11
12
27
40
Note
To acquire a precision resistance value, the Bulk Metal Foil
chip is trimmed by selectively removing built-in “shorting bars.”
To increase the resistance in known increments, marked
areas are cut, producing progressively smaller increases in
resistance. This method reduces the effect of “hot spots” and
improves the long-term stability of VFR resistors.
Trimming process
removes this material
from shorting strip area
changing current path
and increasing
resistance
Foil shown in black, etched spaces in white
Note
* For 0603 values between 4k and 5k, please contact us.
Table 3—Dimensions
in Inches (Millimeters)
Top View
L
T
D
Chip Size
0603
0805
1206
1506
2010
2512
L
±0.005 (0.13)
0.063 (1.60)
0.080 (2.03)
0.126 (3.20)
0.150 (3.81)
0.198 (5.03)
0.249 (6.32)
W
±0.005 (0.13)
0.032 (0.81)
0.050 (1.27)
0.062 (1.57)
0.062 (1.57)
0.097 (2.46)
0.127 (3.23)
W
Thickness Maximum
D
±0.005 (0.13)
0.011 (0.28)
0.015 (0.38)
0.020 (0.51)
0.020 (0.51)
0.025 (0.64)
0.032 (0.81)
0.025 (0.64)
Table 4—Performances (Based on MIL-PRF-55342)
Test
Short Time Overload
High Temperature Exposure
Resistance to Soldering Heat
Moisture Resistance
Humidity Test
Stability Under Load,
175°C, 2,000 h
Load-Life Test,
70°C, 2,000 h
Thermal Shock
Conditions
6.25 x P
nom
+200°C, 1,000 h
Per MIL-PRF-55342 (p.4.8.8.1)
Per MIL-PRF-55342 (p. 4.8.9)
85°C/85% RH, 1000 h
Derated power (see Table 2)
@ rated power (see Table 2)
5 x (–65°C to +175°C)
Typical Limit %
(ppm)
±0.005% (50)
±0.02% (200)
±0.005% (50)
±0.005% (50)
±0.005% (50)
±0.02% (200)
±0.005% (50)
±0.005% (50)
Max Limit %
(1)
(ppm)
±0.01% (100)
±0.05% (500)
±0.01% (100)
±0.01% (100)
±0.01% (100)
±0.03% (300)
±0.01% (100)
±0.01% (100)
Note
(1)
As shown +0.01 Ω to allow for measurement errors at low values.
Document No.: 63235
Revision: 09-Oct-2015
For any questions, contact
foil@vpgsensors.com
www.vishayfoilresistors.com
3
FRST Series (Z1 Foil Technology)
FRST es Foilechnology) 0805, 1506, 2512)
Seri (Z1 T
(0603, 1206, 2010,
(0603, 0805, 1206, 1506, 2010, 2512)
Figure 3—Recommended Mounting
1. IR and vapor phase reflow are recommended.
2. Avoid the use of cleaning agents that attack epoxy resins, which form part of the
resistor construction.
3. Vacuum pick up is recommended for handling.
4. If the use of a soldering iron becomes necessary, precautionary measures should be
taken to avoid any possible damage/overheating of the resistor.
* Recommendation: The solder fillet profile should be such as to avoid running over the
top metallization.
*
Figure 4—Global Part Number Information
(1)
NEW GLOBAL PART NUMBER: Y401612K7560T9R (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
Ω
K
=k
CHARACTERISTICS
9
= lead (Pb)-free
1 to 999
= custom
Y
4
0
1
6
1
2
K
7
5
6
0
T
9
R
4013
= FRST0603
4014
= FRST0805
4015
= FRST1206
4016
= FRST1506
4017
= FRST2010
4018
= FRST2512
PRODUCT CODE
RESISTANCE TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.10 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
R
= tape and reel
W
= waffle pack
PACKAGING
FOR EXAMPLE: ABOVE GLOBAL ORDER Y4016 12K7560 T 9 R:
TYPE: FRST1506
VALUES: 12.7560 kΩ
ABSOLUTE TOLERANCE: 0.01 %
TERMINATION: lead (Pb)-free
PACKAGING: tape and reel
Note
(1)
For non-standard requests, please contact application engineering.
www.vishayfoilresistors.com
4
For any questions, contact
foil@vpgsensors.com
Document No.: 63235
Revision: 09-Oct-2015
Legal Disclaimer Notice
Vishay Precision Group, Inc.
Disclaimer
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, “VPG”), 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 VPG’s terms and conditions of purchase, including but
not limited to, the warranty expressed therein.
VPG 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, VPG 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 VPG’s knowledge of typical requirements that are often placed on VPG 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. You should ensure you have the current version of the relevant information by contacting
VPG prior to performing installation or use of the product, such as on our website at vpgsensors.com.
No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or by any
conduct of VPG.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise
expressly indicated. Customers using or selling VPG products not expressly indicated for use in such applications do
so entirely at their own risk and agree to fully indemnify VPG for any damages arising or resulting from such use or sale.
Please contact authorized VPG personnel to obtain written terms and conditions regarding products designed for such
applications.
Product names and markings noted herein may be trademarks of their respective owners.
Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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