EEWORLDEEWORLDEEWORLD

Part Number

Search

303139U-634R-Q-B-T

Description
Fixed Resistor, Metal Foil, 0.25W, 634ohm, 47V, 0.02% +/-Tol, -.2,.2ppm/Cel, 2412
CategoryPassive components    The resistor   
File Size503KB,7 Pages
ManufacturerVishay
Websitehttp://www.vishay.com
Download Datasheet Parametric View All

303139U-634R-Q-B-T Overview

Fixed Resistor, Metal Foil, 0.25W, 634ohm, 47V, 0.02% +/-Tol, -.2,.2ppm/Cel, 2412

303139U-634R-Q-B-T Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerVishay
package instructionSMT, 2412
Reach Compliance Codecompliant
ECCN codeEAR99
structureMolded Chip
Manufacturer's serial number303139
Number of terminals2
Maximum operating temperature125 °C
Minimum operating temperature-55 °C
Package height2.49 mm
Package length5.99 mm
Package formSMT
Package width3.2 mm
method of packingTR
Rated power dissipation(P)0.25 W
resistance634 Ω
Resistor typeFIXED RESISTOR
series303139
size code2412
technologyMETAL FOIL
Temperature Coefficient-.2,.2 ppm/°C
Tolerance0.02%
Operating Voltage47 V
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
LIUNXC language programming
LIUNXC programming language is very good...
kangliping2008 Programming Basics
Naming method of domestic chip resistors
[table=98%][tr][td] [align=center] [/align] [size=16px] 1. Naming of 5% accuracy: RS-05K102JT 2. Naming of 1% accuracy: RS-05K1002FT R - indicates resistance S - indicates power 0402 is 1/16W, 0603 is...
安_然 Analog electronics
How to solve this problem?
The car starts from point A. The longitude and latitude of point A are known (obtained from GPS). There is no GPS signal during the driving process, but the mileage (in kilometers) and the turning ang...
servent MCU
Help: Which one is faster, the PC's parallel port (LPT1) or the serial port? Thank you!
I would like to ask: Which is more stable, the parallel port (LPT1) or the serial port of a PC? Which is faster? The parallel port (LPT1) can be used as an I/O port, right? Also, please give me a webs...
panyi1012 Embedded System
Implementation of Sampling Method to Improve the Accuracy of ADC Module of TMS320F2812
Introducing a high-precision AD measurement method...
3108009184 Test/Measurement
Popular must-read! Can't these 20 amplifier Q&A selections help you solve your problems?
If you want to learn analog circuit technology, you can't get around the amplifier.In the Amplifier section of our ADI Chinese Technical Forum, thousands of technical questions and expert answers from...
EEWORLD社区 Power technology

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2840  479  1909  2876  605  58  10  39  13  3 
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