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Z205T277K00TB

Description
Fixed Resistor, Metal Foil, 1.5W, 277000ohm, 350V, 0.01% +/-Tol, -.2,.2ppm/Cel, 8216
CategoryPassive components    The resistor   
File Size2MB,8 Pages
ManufacturerVishay
Websitehttp://www.vishay.com
Environmental Compliance  
Download Datasheet Parametric View All

Z205T277K00TB Overview

Fixed Resistor, Metal Foil, 1.5W, 277000ohm, 350V, 0.01% +/-Tol, -.2,.2ppm/Cel, 8216

Z205T277K00TB Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
Objectid1179004874
Reach Compliance Codecompliant
Country Of OriginIsrael
ECCN codeEAR99
YTEOL10
structureRectangular
Lead diameter0.64 mm
Lead length25.4 mm
lead spacing16.51 mm
Manufacturer's serial numberZ205
Number of terminals2
Maximum operating temperature175 °C
Minimum operating temperature-55 °C
Package height10.49 mm
Package length20.83 mm
Package shapeRECTANGULAR PACKAGE
Package formRadial
Package width4.06 mm
method of packingBulk
Rated power dissipation(P)1.5 W
resistance277000 Ω
Resistor typeFIXED RESISTOR
seriesZ205
size code8216
technologyMETAL FOIL
Temperature Coefficient0.2 ppm/°C
Tolerance0.01%
Operating Voltage350 V
Z Series (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Z-Foil Though-Hole Resistor
with TCR of ± 0.05 ppm/°C, Tolerance of ± 0.005 % (50 ppm),
Load Life Stability of ± 0.005 %
FEATURES
Temperature coefficient of resistance (TCR):
- ± 0.05 ppm/°C nominal (0 °C to + 60 °C)
- ± 0.2 ppm/°C nominal (- 55 °C to + 125 °C,
+ 25 °C ref.) (see table 1)
Rated power: to 1 W at + 125 °C (see table 2)
Resistance tolerance: to ± 0.005 % (50 ppm)
Load life stability: ± 0.005 % at 70 °C, 2000 h or ±0.015%
at 70°C,10000 h (see table 4)
Resistance range: 5
to
600 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)
Total accumulated change in resistance over life (EOL)
or Total Error Budget < 0.1 % (or better with PMO)**
Electrostatic discharge up to 25 000 V
Non-inductive, non-capacitive design
Rise time: 1 ns effectively no ringing
Current noise:
0.010 µV
RMS
/V of applied voltage (< - 40
dB)
Thermal EMF: 0.05 µV/°C typical
Voltage coefficient: < 0.1 ppm/V
Low inductance: < 0.08 µH typical
Thermal stabilization time < 1 s (to reach within 10 ppm of
steady state value)
Pattern design minimizing hot spots
Terminal finish: lead (Pb)-free or tin/lead alloy
Matched sets are available per request
(TCR tracking: to 0.5 ppm/°C)
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
INTRODUCTION
The Bulk Metal
®
Foil resistor is based on a special
thermo-metalic stress concept wherein a proprietary bulk
metal cold rolled foil is cemented to a ceramic substrate. It is
then photoetched into a resistive pattern. Then it is laser
adjusted to any desired value and tolerance. Because the
metals used are not drawn, wound or mistreated in any way
during manufacturing process, the Bulk Metal Foil resistor
maintains all its design, physical and electrical
characteristics while winding of wire or sputtering does not.
Z foil resistors achieve maximum stability and near-zero
TCR. These performance characteristics are built-in for
every unit, and do not rely on screening or other artificial
means for uniform performance.
The stability of a resistor depends primarily on its history of
exposures to temperature. Stability is affected by:
1. Reversible changes in the ambient temperature and heat
from adjacent components (defined by the Temperature
Coefficient of Resistance, or TCR)
2. Short-term steady-state self-heating (defined by Power
TCR or PCR)
3. Irreversible destabilizing shock of suddenly-applied
power
4. Long-term exposure to applied power (load-life stability)
5. Repetitive stresses from being switched on and off
In very high-precision resistors, these effects must be taken
into account to achieve high stability with changes in load
(Joule Effect) and ambient temperature.
Vishay Foil Resistors’ new Z-Foil technology provides an
order of magnitude reduction in the Bulk Metal Foil
element’s sensitivity to temperature changes - both external
and internal. This technology provides TCR of
± 0.05 ppm/°C nominal (instrument range: 0 °C to +60 °C),
± 0.2 ppm/°C nominal (military range: - 55 °C to + 125 °C,
+ 25 °C ref), and a PCR of 5 ppm at rated power.
In order to take full advantage of this TCR improvement, it is
necessary to take into account the differences in the
resistor’s response to each of the above-mentioned effects.
The Z series has been developed to successfully deal with
these factors.
TABLE 1 - NOMINAL TCR AND MAX. SPREAD
(- 55 °C to + 125 °C, + 25 °C ref.)
VALUE
100
to 600 K
80
to < 100
50
to < 80
25
to < 50
10
to < 25
5
to < 10
STANDARD
TOLERANCE
± 0.005 %
± 0.005 %
± 0.01 %
± 0.01 %
± 0.02 %
± 0.05 %
NOMINAL TCR AND
MAX. SPREAD
(ppm/°C)
± 0.2 ± 0.6
± 0.2 ± 0.8
± 0.2 ± 1.0
± 0.2 ± 1.3
± 0.2 ± 1.6
± 0.2 ± 2.3
* Pb containing terminations are not RoHS compliant, exemptions may apply
** See PMO page 5
Document Number: 63187
Revision: 22-Oct-13
For any questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
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