Ov series fixed, Fixed oval resistor, Vishay milwaukee – C&H Technology OV Series Fixed User Manual
Page 2
OV Series Fixed
www.vishay.com
Vishay Milwaukee
Revision: 18-Dec-12
1
Document Number: 31835
For technical questions, contact:
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
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
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.
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.
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL MODEL
HISTORICAL MODEL
POWER RATING
W
RESISTANCE RANGE
TOLERANCE
(1)
± %
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
DERATING FOR GROUP INSTALLATIONS
NUMBER OF RESISTORS
STACKED
% OF SINGLE RATING
VERTICAL CHASSIS
HORIZONTAL CHASSIS
2
80
75
3
70
60
4
65
50
DIMENSIONS in inches (millimeters)
GLOBAL MODEL
DISTANCE BETWEEN TERMINALS
OVERALL LENGTH
TERMINAL STYLE
A
L
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