EEWORLDEEWORLDEEWORLD

Part Number

Search

303140-78R7-E-B-T

Description
Fixed Resistor, Metal Foil, 0.6W, 78.7ohm, 127V, 0.2% +/-Tol, -.2,.2ppm/Cel, 2917
CategoryPassive components    The resistor   
File Size503KB,7 Pages
ManufacturerVishay
Websitehttp://www.vishay.com
Download Datasheet Parametric View All

303140-78R7-E-B-T Overview

Fixed Resistor, Metal Foil, 0.6W, 78.7ohm, 127V, 0.2% +/-Tol, -.2,.2ppm/Cel, 2917

303140-78R7-E-B-T Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
package instructionSMT, 2917
Reach Compliance Codecompliant
ECCN codeEAR99
structureMolded Chip
Manufacturer's serial number303140
Number of terminals2
Maximum operating temperature175 °C
Minimum operating temperature-55 °C
Package height2.79 mm
Package length7.29 mm
Package formSMT
Package width4.32 mm
method of packingTR
Rated power dissipation(P)0.6 W
GuidelineMIL-PRF-55182
resistance78.7 Ω
Resistor typeFIXED RESISTOR
series303140
size code2917
technologyMETAL FOIL
Temperature Coefficient-.2,.2 ppm/°C
Tolerance0.2%
Operating Voltage127 V
Base Number Matches1
303139, 303140
Vishay Foil Resistors
Models # 303139 and 303140 - Molded Surface Mount Space and Military
Grade Resistors SMRxDZ with Screen/Test Flow in Compliance with
EEE-INST-002, (Tables 2A and 3A, Film/Foil, Level 1) and MIL-PRF-55182
FEATURES
Temperature coefficient of resistance (TCR):
± 0.2 ppm°C typical (- 55 °C to + 125 °C, + 25 °C ref.)
Tolerance: to ± 0.02 %
Power coefficient of resistance (PCR)
“ΔR due to self heating”: 5 ppm at rated power
Flexible terminations ensure minimal stress transference
from the PCB due to a difference in thermal coefficient of
expansions (TCE)
Electrostatic discharge (ESD) up to 25 000 V
Load life stability: ± 0.005 % (70 °C, 2000 h at rated power)
Resistance range: 5
Ω
to 40 kΩ
Vishay Foil resistors are not restricted to standard values;
specific “as requested” values can be supplied at no extra
cost or delivery (e.g. 1K2345 vs. 1K)
Maximum power: to 600 mW at 70 °C
Non-inductive, non-capacitive design
Current noise: - 40 dB
Voltage coefficient: < 0.1 ppm/V
Non-inductive: < 0.08 µH typical
Non hot spot design
Terminal finish: tin/lead alloy
Matched sets with TCR tracking are available upon
request
For oriented performances please contact us
For prototype units, append a “U” to the model number
(example: 303139U). These units pass all tests per table 3
(page 4) with no destructive qualification testing required
(table 4, page 4). For more information, please contact
foil@vishaypg.com
INTRODUCTION
The 303139, 303140 are ultra high precision molded surface
mountable resistors offering all the elements of precision;
including low TCR, tight tolerance, long term stability, low
noise, low thermal EMF, and non-measurable voltage
coefficient. One of the important parameters influencing
stability is the temperature coefficient of resistance (TCR).
Although the TCR of foil resistors is considered extremely
low, this characteristic has been further refined over the
years. These resistors utilize ultra high precision Bulk Metal
®
Z-Foil.
The Z-Foil technology provides a significant reduction of
the resistive element’s sensitivity to ambient temperature
variations (TCR) and to self heating when power is applied
(power coefficient).
Voltage division with tight tracking < 2 ppm/°C can be
achieved with 2
randomly
selected units even with a large
ratio between the two values.
Our application engineering department is available to
advise and make recommendations.
TABLE 1 - TOLERANCE AND TCR VS.
RESISTANCE VALUE
(- 55 °C to + 125 °C, + 25 °C ref.)
VALUE
250
Ω
to 40 kΩ
50
Ω
to < 250
Ω
20
Ω
to < 50
Ω
10
Ω
to < 20
Ω
5
Ω
to < 10
Ω
ABSOLUTE
TOLERANCE
± 0.02 %
± 0.05 %
± 0.1 %
± 0.2 %
± 0.5 %
TYPICAL TCR AND
MAX. SPREAD
(ppm/°C)
± 0.2 ± 1.8
± 0.2 ± 1.8
± 0.2 ± 2.8
± 0.2 ± 4.8
± 0.2 ± 6.8
FIGURE 1 - POWER DERATING CURVE
200
175
Rated Power (%)
150
125
100
75
50
25
0
- 75
- 25
+ 25
+ 75
+ 125
Ambient Temperature (°C)
+ 175
- 55 °C
+ 70 °C
Document Number: 63165
Revision: 27-Jul-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
1
How to connect the inouts of two modules in VHDL? ? ? ?
How to interconnect the inouts of two modules in VHDL ?...
eeleader FPGA/CPLD
0 points post earn points~~~
...
guang_84 Embedded System
How can programming reduce program bugs?
As the title says, this is probably a common problem for everyone, right? One way is: Always limit the "program size" to the scope you can control. What if it exceeds the scope? Modularization - Reaso...
gina Embedded System
Bug notes on the assembly stage during the application of DSP C6678
1. After clicking the Run button, the program cannot end for a long time. After clicking the Pause button, an error pops up and the program can only be disconnected. Reason: The floating-point instruc...
fish001 DSP and ARM Processors
How to convert CString type to INT?
CString strDefault = 111; I want to assign 111 to int a; how to do that? I can't use atoi...
ryl_522 Embedded System
Apply for a free trial of the Tektronix MSO5 Series Mixed Signal Oscilloscope!
[b][color=#ff0000][font=微软雅黑][size=3] [/size][/font][/color][font=微软雅黑][color=#000000]Tektronix opens up the era of oscilloscopes that are faster than the "core"[/color][/font] [/b] Tek049 - have you ...
eric_wang Test/Measurement

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1316  692  198  720  1999  27  14  4  15  41 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号