RS Style Wirewound Fuse Resistor
Vishay Dale
Fast Acting, Molded Styles,
Custom Designed For Your Application
FEATURES
• Low temperature coefficient (down to 30 ppm/°C)
• High temperature silicone molded package
(derated to 200 °C)
• Performs function of resistor and series fuse and provides
predictable fusing times
• Complete welded construction
• No flaming or distortion of unit under fusing conditions
• Ideal for Squib circuit applications and protection of
semi-conductor devices
• Negligible noise and voltage coefficient
TYPICAL ELECTRICAL SPECIFICATIONS
The following are offered as examples of reliable designs. Hundreds of possible combinations are available for meeting your requirements.
Contact factory by using email address in the footer of this page, for assistance. Higher wattages available.
FUSING PARAMETERS
GLOBAL
MODEL
HISTORICAL
MODEL
FUSING
CURRENT
A
0.5
1.0
1.25
1.5
2.0
2.5
3.0
4.0
6.0
8.0
10.0
15.0
20.0
TYPICAL
FUSING TIME
ms
4
9
8
15
15
23
48
47
70
48
50
35
46
RESISTANCE
RANGE
TOLERANCE
±%
1.0 W CONTINUOUS POWER
(1)
CONTINUOUS
CURRENT
A
0.10
0.25
0.30
0.35
0.40
0.45
0.55
0.75
1.0
1.25
1.50
1.75
2.0
CROSSOVER
VALUE
100.0
16.0
11.11
8.16
6.25
4.94
3.31
1.78
1.0
0.64
0.44
0.33
0.25
RS01A...209
RS-1A-209
49 to 500
5, 10
RS01A...118
RS-1A-118
6.8 to 185
5, 10
RS01A...212
RS-1A-212
4.7 to 107
5, 10
RS01A...213
RS-1A-213
3.5 to 68
5, 10
RS01A...143
RS-1A-143
2.2 to 35
5, 10
RS01A...214
RS-1A-214
1.7 to 23
5, 10
RS01A...162
RS-1A-162
1.1 to 12
5, 10
RS01A...208
RS-1A-208
0.72 to 6.44
5, 10
RS01A...207
RS-1A-207
0.35 to 2.17
5, 10
RS01A...215
RS-1A-215
0.29 to 1.61
5, 10
RS01A...173
RS-1A-173
0.23 to 1.16
5, 10
RS01A...216
RS-1A-216
0.19 to 0.82
5, 10
RS01A...217
RS-1A-217
0.12 to 0.42
5, 10
Notes
(1)
The continuous current rating applies only to values equal to or less than the crossover value. The continuous power rating applies only to
values equal to or higher than the crossover value.
• Be aware that the inherent compromise involved between resistive and fusing functions sometimes makes certain exact combinations
unattainable. However, in nearly all cases, this does not prevent the production of a functional, reliable fuse resistor thoroughly capable of
meeting application requirements.
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: RS01A402R0JS70209
R
S
0
1
A
VALUE
4
0
2
R
0
J
S
7
0
2
0
9
GLOBAL MODEL
(See Typical Electrical
Specifications Global
Model column for
options)
TOLERANCE
J
= ± 5.0 %
K
= ± 10.0 %
PACKAGING
E70
= Lead (Pb)-free, tape/reel
E12
= Lead (Pb)-free, bulk
S70
= Tin/lead, tape/reel
B12
= Tin/lead, bulk
5%
TOLERANCE CODE
SPECIAL
(Dash Number)
(up to 3 digits)
From
1 to 999
as applicable
R
= Decimal
15R00
= 15
Historical Part Numbering example: RS-1A-209 402
5 % S70
RS-1A-209
HISTORICAL MODEL
402
RESISTANCE VALUE
S70
PACKAGING
If a MODEL listed in TYPICAL ELECTRICAL SPECIFICATIONS table does not meet your requirements, then please include the following
information. It will enable us to choose the best design for your application.
1. Operating wattage or current, ambient temperature and required resistance stability. (%
R/1000
h)
2. Fusing wattage or current and maximum “blow” time. Also, minimum “blow” time, if applicable.
3. Nominal resistance and maximum allowable resistance tolerance, (5 % to 10 % preferred).
4. Maximum allowable physical size.
5. Voltage to be interrupted.
6. Frequency of power source, wave form and a brief description of your application.
Document Number: 30232
Revision: 17-Feb-11
For technical questions, contact:
ww2aresistors@vishay.com
www.vishay.com
1
RS Style Wirewound Fuse Resistor
Vishay Dale
Fast Acting, Molded Styles,
Custom Designed For Your Application
DIMENSIONS
in inches [millimeters]
A
1.25 [31.75]
minimum
B
0.020 ± 0.002
[0.508 ± 0.051]
MODEL
RS01A…xxx
A
0.422 ± 0.015 [10.72 ± 0.381]
B
0.110 ± 0.015 [2.79 ± 0.381]
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature Coefficient
Power Rating
Dielectric Strength
Insulation Resistance
Fusing Times
Minimum Fusing Current
Terminal Strength
UNIT
ppm/°C
W
V
AC
M
s
A
lb
TYPICAL WIREWOUND FUSE RESISTOR CHARACTERISTICS
± 30 for 10
and above; ± 50 for 1.0
thru 9.9
;
± 90 for 0.1
thru 0.99
1.0 standard, higher power ratings available
500
1000 minimum dry
0.001 to 1.0
Approximately 4 times the continuous operating current
obtainable on some designs. Larger ratios produce better designs.
5 minimum
MATERIAL SPECIFICATIONS
Element:
Copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
Core:
Alumina ceramic
Encapsulant:
Thermoset silicone mold compound
End Caps:
Stainless steel
Terminals:
Tinned copperweld
Part Marking:
Dale, model, value, tolerance, date code
RATED POWER IN %
120
100
80
60
40
20
0
0
25
50
75
100
125
150
175
200
AMBIENT TEMPERATURE °C
Derating
www.vishay.com
2
For technical questions, contact:
ww2aresistors@vishay.com
Document Number: 30232
Revision: 17-Feb-11
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.
Material Category Policy
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the
definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council
of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
(EEE) - recast, unless otherwise specified as non-compliant.
Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that
all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free
requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference
to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21
conform to JEDEC JS709A standards.
Revision: 02-Oct-12
1
Document Number: 91000
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