6121 Baker Road,
Suite 108
Minnetonka, MN 55345
www.chtechnology.com
Phone (952) 933-6190
Fax (952) 933-6223
1-800-274-4284
Thank you for downloading this document from C&H Technology, Inc.
Please contact the C&H Technology team for the following questions -
Technical
Application
Assembly
Availability
Pricing
Phone – 1-800-274-4284
E-Mail – sales@chtechnology.com
www.chtechnology.com - SPECIALISTS IN POWER ELECTRONIC COMPONENTS AND ASSEMBLIES - www.chtechnology.com
OV Series Fixed
www.vishay.com
Vishay Milwaukee
Fixed Oval Resistor
FEATURES
• Terminal bands are spotwelded onto the
insulated core and resistance-alloy wire is
precisely wound onto the oval core
• The wire is spotwelded to the terminal bands
and then “locked” onto the core with a silicone
or cement coating
• Available as fixed and adjustable resistors (for adjustable
Oval Resistor see www.vishay.com/doc?31836
•Wirewound
• Material categorization: For definitions of compliance
please see www.vishay.com/doc?99912
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL MODEL HISTORICAL MODEL
OVSF0030 16-20 Oval 30 1.2 to 7.3K 5
OVSF0040 16-32 Oval 40 1.7 to 27K 5
OVSF0055 16-56 Oval 55 2.4 to 85K 5
OVSF0070 16-76 Oval 70 3.0 to 137K 5
OVSF0095 16-96 Oval 95 4.1 to 171K 5
Notes
• Ratings are based on a temperature rise of300 °C above an ambient of 40 °C.
(1)
Standard fixed resistance tolerance ± 5 %. Resistance values less than 1 and adjustable have ± 10 % tolerance. Closer tolerances
available upon request.
POWER RATING
W
RESISTANCE RANGE
TOLERANCE
)
(1)
± %
DERATING FOR GROUP INSTALLATIONS
NUMBER OF RESISTORS
STACKED
28075
37060
46550
Notes
• Ratings are based on mounting on a steel panel 10" x 10" x 0.040". Derate by 29 % when mounting on non-heat conductive surface.
VERTICAL CHASSIS HORIZONTAL CHASSIS
% OF SINGLE RATING
DIMENSIONS in inches (millimeters)
GLOBAL MODEL
OVSF0030 2 (50.8) 1.25 (31.75) = A + 0.625 (15.875) A
OVSF0040 2.75 (69.85) 2 (50.8) = A + 0.625 (15.875) A
OVSF0055 4.25 (107.95) 3.5 (88.9) = A + 0.625 (15.875) A
OVSF0070 5.5 (139.7) 4.75 (120.65) = A + 0.625 (15.875) A
OVSF0095 6.75 (171.45) 6 (152.4) = A + 0.625 (15.875) A
DISTANCE BETWEEN TERMINALS
AL
OVERALL LENGTH TERMINAL STYLE
Revision: 18-Dec-12
For technical questions, contact: vishaymilwaukeeresistor@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
1
Document Number: 31835
D
Type H
B
A
C
B
D
C
A
Type A
OV Series Fixed
www.vishay.com
TERMINAL STYLE in inches (millimeters)
DIMENSIONS A (3/16" LUG) H (1/4" SQC)
Width (A) 0.1875 (4.7625) 0.25 (6.35)
Height (B) 0.375 (9.525) 0.625 (15.875)
Dia. (C) 0.13 (3.302) 0.065 (1.651)
Thickness (D) 0.02 (0.508) 0.032 (0.8128)
MATERIAL SPECIFICATIONS
Element Copper-nickel, nickel-chrome, iron-chrome-aluminum
Core Steatite
Coating High temperature silicone
Standard terminals Nickel-iron
Part marking Value, date code, MRC
Vishay Milwaukee
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: OVSF0070137K0JHB00 (OVSF0070 137K 5 % 1/4SQC B)
OVSF0070137K0JHB00
MODEL
(2 digits)
OV S =
COATING
(1 digit)
Silicone
TYPE
(1 digit)
F =
Fixed
SIZE
(4 digits)
0030 =
30 W
0095 =
95 W
Available
sizes:
0030
0040
0055
0070
0095
VALUE
(5 digits)
R = Decimal
K = Thousand
R1500 = 0.15
1K500 = 1.5 k
Check
datasheet
for available
value range
TOLERANCE
(1 digit)
D = ± 0.5 %
F = ± 1.0 %
G = ± 2.0 %
H = ± 3.0 %
J = ± 5.0 %
K = ± 10 %
M = ± 20 %
TERMINAL
(1 digit)
A = 3/16" lug (3/16L)
F = 3/8" lug (3/8L)
H = 1/4" single
quick-connect
(1/4SQC)
M = 3/8" lug
with steel
hardware
(3/8LSteel707)
N = 3/8" lug
with brass
hardware
(3/8LBrass707)
S = 3/8" lug
with steel
hardware
(3/8LSteel708)
T = 3/8" lug
with brass
hardware
(3/8LBrass708)
PACKAGING
(1 digit)
B = Bulk
F = 42 cell partition,
012CC box
G = 96 cell partition,
010CC or 019CC box
H = 25 cell partiton,
006CC box
J = 11 cell partition (fish),
017CC box
K = 48 cell partition,
010CC or 019CC box
L = 140 cell partition,
010CC or 019CC box
M = 144 cell partition,
006CC or 005CC box
N
= Individually boxed,
bubble wrap and partitions
O = Double boxed,
bubble wrap and partitions
R = International,
heavy duty and
plastic skids
S = Individually boxed
SPECIAL
(2 digits)
00 =
Standard
NI =
Non-inductive
NS =
No strips
and spacers
See packaging codes
for additional options
Revision: 18-Dec-12
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
For technical questions, contact: vishaymilwaukeeresistor@vishay.com
2
Document Number: 31835
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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