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Datasheet> All Categories > Passive components> RWR74S2R49FRBSL
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RWR74S2R49FRBSL

Description
res 2.49 ohm 5W 1% WW axial
CategoryPassive components   
File Size182KB，4 Pages
ManufacturerVishay
Websitehttp://www.vishay.com
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RWR74S2R49FRBSL Overview

res 2.49 ohm 5W 1% WW axial

RWR74S2R49FRBSL Preview

RWR Military
www.vishay.com
Vishay Dale
Wirewound Resistors, Military/Established Reliability,
MIL-PRF-39007 Qualified, Type RWR, Up to S Level, Axial Lead
FEATURES
• High temperature silicone coated
• Complete welded construction
• Qualified to MIL-PRF-39007
• Available in non-inductive styles (type N) with
Ayrton-Perry winding for lowest reactive components
DESIGN SUPPORT TOOLS
Models
Available
click logo to get started
• “S” level failure rate available
Note
• “Terminal Wire and Winding” type “W” and “Z” are not listed
below but are available upon request. Please reference
MIL-PRF-39007 QPL for approved “failure rate” and “resistance
tolerance/ranges”
STANDARD ELECTRICAL SPECIFICATIONS
MILITARY MODEL
RWR81S
RWR81N
RWR82S
RWR82N
RWR80S
RWR80N
RWR71S
RWR71N
RWR89S
RWR89N
RWR74S
RWR74N
RWR84S
RWR84N
RWR78S
RWR78N
VISHAY REFERENCE
MODEL
EGS-1-80
EGN-1-80
EGS-2
EGN-2
EGS-3-80
EGN-3-80
ESS-2A
ESN-2A
ESS-2B
ESN-2B
ESS-5
ESN-5
EGS-10-80
EGN-10-80
ESS-10
ESN-10
POWER RATING
P
25 °C
W
1
1
1.5
1.5
2
2
2
2
3
3
5
5
7
7
10
10
RESISTANCE RANGE
± 0.1 %
0.499 to 1K
0.499 to 499
0.499 to 1.3K
0.499 to 649
0.499 to 3.16K
0.499 to 1.58K
0.499 to 12.1K
0.499 to 6.04K
0.499 to 4.12K
0.499 to 2.05K
0.499 to 12.1K
0.499 to 6.04K
0.499 to 12.4K
0.499 to 6.19K
0.499 to 39.2K
0.499 to 19.6K
RESISTANCE RANGE
± 0.5 %, ± 1 %
0.1 to 1K
0.1 to 499
0.1 to 1.3K
0.1 to 649
0.1 to 3.16K
0.1 to 1.58K
0.1 to 12.1K
0.1 to 6.04K
0.1 to 4.12K
0.1 to 2.05K
0.1 to 12.1K
0.1 to 6.04K
0.1 to 12.4K
0.1 to 6.19K
0.1 to 39.2K
0.1 to 19.6K
WEIGHT
(typical) g
0.21
0.21
0.23
0.23
0.34
0.34
0.90
0.90
0.70
0.70
4.2
4.2
3.6
3.6
9.0
9.0
Note
• RWR82S and RWR82N: Core consists of beryllium oxide ceramic
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: RWR74S49R9FSB12
R
MIL TYPE
(5 digits)
RWR71
RWR74
RWR78
RWR80
RWR81
RWR82
RWR84
RWR89
W
R
7
4
S
4
9
R
9
F
S
B
1
2
PACKAGING CODE
(3 digits)
B12
= bulk pack
S70
= tape/reel
(smaller than 5 W)
S73
= tape/reel
(500 pieces)
BSL
(2)
= bulk pack,
single lot date code
RSL
(2)
= tape/reel,
single lot date code
TERMINAL WIRE AND WINDING
(1 digit)
S
= solderable, inductive
N
= solderable, non-inductive
W
= weldable, inductive
(1)
Z
= weldable, non-inductive
(1)
RESISTANCE VALUE
(4 digits)
3 digit significant figure,
followed by a multiplier
49R9
= 49.9
1000
= 100
1001
= 1000
TOLERANCE CODE
(1 digit)
B
= ± 0.1 %
D
= ± 0.5 %
F
= ± 1.0 %
FAILURE RATE
(1 digit)
M
= 1.0 %/1000 h
P
= 0.1 %/1000 h
R
= 0.01 %/1000 h
S
= 0.001 %/1000 h
Notes
Note that “W” and “Z” are not listed above but are available, see MIL-PRF-39007 QPL for available resistance values
(2)
Maximum order sizes apply for single lot date code package codes, please see table below
(1)
Revision: 15-Nov-17
Document Number: 30203
1
For technical questions, contact:
ww2aresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
RWR Military
www.vishay.com
Vishay Dale
MAXIMUM ORDER SIZE FOR SINGLE LOT DATE CODE PACKAGE CODES
MODEL
RWR81
RWR82
RWR80
RWR71
RWR89
RWR74
RWR84
RWR78
MAXIMUM ORDER SIZE (PIECES)
1000
1000
1000
500
1000
500
300
300
DIMENSIONS
in inches [millimeters]
A
1.50 [38.10]
(1)
min.
B
C
MILITARY MODEL
RWR81
RWR82
RWR80
RWR71
RWR89
RWR74
RWR84
RWR78
DIMENSIONS
in inches [millimeters]
A
0.250 ± 0.031 [6.35 ± 0.787]
0.312 ± 0.016 [7.92 ± 0.406]
0.406 ± 0.031 [10.31 ± 0.787]
0.812 ± 0.062 [20.62 ± 1.58]
0.560 ± 0.062 [14.22 ± 1.58]
0.875 ± 0.062 [22.23 ± 1.58]
0.875 ± 0.062 [22.23 ± 1.58]
1.780 ± 0.062 [45.21 ± 1.58]
B
0.085 ± 0.020 [2.16 ± 0.508]
0.078 + 0.016 - 0.031 [1.98 + 0.406 - 0.787]
0.094 ± 0.031 [2.39 ± 0.787]
0.187 ± 0.031 [4.75 ± 0.787]
0.187 ± 0.031 [4.75 ± 0.787]
0.312 ± 0.031 [7.92 ± 0.787]
0.312 ± 0.031 [7.92 ± 0.787]
0.375 ± 0.031 [9.525 ± 0.787]
C
0.020 ± 0.0015 [0.508 ± 0.038]
0.020 ± 0.0015 [0.508 ± 0.038]
0.020 ± 0.0015 [0.508 ± 0.038]
0.032 ± 0.002 [0.813 ± 0.051]
0.032 ± 0.002 [0.813 ± 0.051]
0.040 ± 0.002 [1.02 ± 0.051]
0.040 ± 0.002 [1.02 ± 0.051]
0.040 ± 0.002 [1.02 ± 0.051]
Note
(1)
On some standard reel pack methods, the leads may be trimmed to a shorter length than shown
TECHNICAL SPECIFICATIONS
PARAMETER
Dielectric Withstanding Voltage
Short Time Overload
Maximum Working Voltage
Insulation Resistance
Terminal Strength
Solderability
Operating Temperature Range
UNIT
V
AC
-
V
.
lb
-
°C
RWR RESISTOR CHARACTERISTICS
500 minimum for 2 W and smaller, 1000 minimum for 3 W and larger
5x rated power for 5 s for 3 W size and smaller,
10x rated power for 5 s for 5 W size and greater
(P x
R)
1/2
1000 M minimum dry, 100 M minimum after moisture test
5 minimum for 2 W and smaller, 10 minimum for 3 W and larger
Meets requirements of ANSI J-STD-002
-55 to +250
RESISTANCE TEMPERATURE COEFFICIENT
RWR71
RWR74
RWR78
RWR80
RWR81
RWR82
RWR84
RWR89
TEMPERATURE
COEFFICIENT RESISTANCE RESISTANCE RESISTANCE RESISTANCE RESISTANCE RESISTANCE RESISTANCE RESISTANCE
(ppm/°C)
RANGE ()
RANGE ()
RANGE ()
RANGE ()
RANGE ()
RANGE ()
RANGE ()
RANGE ()
+650 max.
+400 max.
± 50
± 30
± 20
Revision: 15-Nov-17
0.1 to 0.499
0.505 to 1.0
1.01 to 10
10.1 to 73.2
74.1
and above
0.1 to 0.499
0.505 to 1.0
1.01 to 10
10.1 to 158
160
and above
0.1 to 0.499
0.505 to 1.0
1.01 to 10
10.1 to 453
459
and above
0.1 to 0.499
0.505 to 1.0
1.01 to 10
-
10.1
and above
0.1 to 0.499
0.505 to 1.0
1.01 to 10
-
10.1
and above
0.1 to 0.499
0.505 to 1.0
1.01 to 10
-
10.1
and above
0.1 to 0.499
0.505 to 1.0
1.01 to 10
10.1 to 158
160
and above
0.1 to 0.499
0.505 to 1.0
1.01 to 10
10.1 to 42.2
42.7
and above
Document Number: 30203
2
For technical questions, contact:
ww2aresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
RWR Military
www.vishay.com
MATERIAL SPECIFICATIONS
Element:
copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
Core:
ceramic, beryllium oxide
(1)
, steatite or alumina,
depending on power requirement
Coating:
special high temperature silicone
Terminal and Winding:
the terminal and the winding are
identified by a letter symbol in the military type designation.
Military symbol:
S
= solderable, inductively wound
W
= weldable, inductively wound
N
= solderable, non-inductively wound
Z
= weldable, non-inductively wound
Terminals:
solderable - Tinned Copperweld
®
Weldable - bare nickel per MIL-STD-1276, Type N-1
End Caps:
stainless steel
Part Marking:
source code, JAN, military PIN, date/lot code
Note
(1)
RWR82S and RWR82N: Core consists of beryllium oxide
ceramic
Vishay Dale
DERATING
RATED POWER IN %
120
100
80
60
40
20
0
- 65 - 50
0
25
50
150
250
AMBIENT TEMPERATURE IN °C
PERFORMANCE
TEST
Thermal Shock
Short Time Overload
Dielectric Withstanding Voltage
Low Temperature Storage
High Temperature Exposure
Moisture Resistance
Shock, Specified Pulse
Vibration, High Frequency
Load Life
Extended Life
Terminal Strength
CONDITIONS OF TEST
MIL-STD-202, method 107
5x rated power (RWR71, RWR80, RWR81, RWR89, RWR82),
10 x rated power (RWR74, RWR78, RWR84) for 5 s
500 V
RMS
(RWR80, RWR81, RWR82),
1000 V
RMS
(RWR71, RWR74, RWR78, RWR84, RWR89), 1 min duration
-55 °C for 24 h
250 °C for 2000 h
MIL-STD-202, method 106
MIL-STD-202, method 213, condition I
MIL-STD-202, method 204, condition D
2000 h at rated power, +25 °C, 1.5 h “ON”, 0.5 h “OFF”
10 000 h at rated power, +25 °C, 1.5 h “ON”, 0.5 h “OFF”
MIL-STD-202, method 211, condition A and C
5 pound (RWR80, RWR81, RWR82),
10 pound (RWR71, RWR74, RWR78, RWR84, RWR89)
TEST LIMITS
± (0.2 % + 0.005
) R
± (0.2 % + 0.005
) R
± (0.1 % + 0.005
) R
± (0.1 % + 0.005
) R
± (1.0 % + 0.005
) R
(1)
± (0.2 % + 0.005
) R
± (0.1 % + 0.005
) R
± (0.1 % + 0.005
) R
± (0.5 % + 0.005
) R
± (1.0 % + 0.005
) R
± (0.1 % + 0.005
) R
Note
(1)
For resistance values above 100
,
test limit is ± 1.0 %
Revision: 15-Nov-17
Document Number: 30203
3
For technical questions, contact:
ww2aresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Legal Disclaimer Notice
www.vishay.com
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay 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.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of
typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding
statements about the suitability of products for a particular application. 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.
Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over
time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk.
Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document
or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
© 2017 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 08-Feb-17
1
Document Number: 91000
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