FRST Series (0603, 0805, 1206, 1506, 2010, 2512) (Z1-Foil)
Vishay Foil Resistors
Ultra High Precision Foil Wraparound Surface Mount Chip Resistor
for High Temperature Applications up to +200°C, Humidity proof
(85°C/85% RH) to 0.015%, Stability under load of 0.02%
FEATURES
Humidity test : 85°C/85% RH, 1000 hrs to
R 0.015%, typical
Temperature coefficient of resistance (TCR):
2.5 ppm/°C typical (- 55 °C to + 175 °C, + 25 °C ref.)
Resistance Range: 5 to 125 k(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
Top View
Power rating: to 750 mW at + 70 °C
to 150 mW at +175°C
Load life stability:
INTRODUCTION
The FRST is based on the new generation Z1- technology of
the Bulk Metal® Precision Foil resistor elements by Vishay
Precision Group (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 25KV 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 -55 C° to more than 175C°.
Resistance patterns are photo-etched to permit trimming of
resistance values to very tight tolerances.
± 0.0025 % at 70 °C, 2000 h at rated power.
Stability under load: 0.02% at +175 °C, 2000 h at
derated power
Vishay 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 25kV
Short time overload: 0.005 %
Rise time: 1 ns effectively no ringing
Current noise: 0.010 µVRMS/V of applied voltage
(< - 40 dB)
Voltage coefficient: 0.1 ppm/V
Non inductive: 0.08 µH
Non hot spot design
The FRST series has a full wraparound termination, and was
especially designed for applications up to +200°C.
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, please contact: foil@vishaypg.com
The FRST is available in any value within the specified
resistance range. VFR's application engineering department
is available to advise and make recommendations. For
non-standard
technical
requirements
and
special
TABLE 1 - TOLERANCE AND TCR VS.
RESISTANCE VALUE (1)
applications, please contact us using the e-mail address in
the footer below.
(- 55 °C to + 175 °C, + 25 °C Ref.)
RESISTANCE
FIGURE 1 - POWER DERATING CURVE
TOLERANCE
(%)
TYPICAL TCR
(ppm/°C)
VALUE
()
250to 125K
100to < 250
50to < 100
25to < 50
+70°C
-55°C
100
75
50
25
0
± 0.01
± 0.02
± 0.05
± 0.1
± 2.5
10to < 25
5to < 10(2)
± 0.25
± 0.5
-75 -50
-25
0
+25 +50 +75 +100 +125 +150 +175 +200
Ambient Temperature (°C)
(1) For tighter performances and non-standard values lower than 5 and above 125k, please contact VFR’s application engineering using the
e-mail addresses in the footer below.
(2) TCR of these low value range : ± 10ppm/°C max
Document Number: 63235
Revision: 29-Aug-12
For any questions, contact: foil@vishaypg.com
www.vishayfoilresistors.com
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