Power Resistor - Series HS
(Heat Sink)
5W to 250W
FEATURES:
Aluminum Finned Heat Sink Case - Molded Construction
Screw Mounts on Chassis - Complete Welded Construction
Heavy Spade lug type leads - High Stability at Conventional Power Ratings
ELECTRICAL SPECIFICATIONS:
Models: 5, 10, 25 and 50 watts - Resistance Range: .05 ohms to 200K ohms
Tolerances: .05% to 10% - Temperature Coefficient: 20PPM to 90PPM
Dielectric Strength: 1000 VAC min. - Non-inductive available: add letter N after P/N
POWER RANGE: HS resisitor ratings are based on the following (2) requirements:
(1) 275°C max. internal hotspot temp. (2) 1% max. R in 1000 hour load life for all models.
DERATING: HS resistors have an operating temperature range of -55° to +275°C. Derating is required for reduced chassis mounting area and for high ambient temperature.
Dimension Shown in Inches. Conversion to M.M. = Inch x 25.4
M-O
P/N
MIL-PRF
18546
Com'l
Watt
Max.
Working
Voltage
Max.
Res.
A
±.005
B
±.005
C
±.032
D
±.062
E
±.015
HS5  RE60 5 160 20K .444 .490 .600 1.125 .334
HS10 RE65 10 265 30K .562 .625 .750 1.375 .438
HS25 RE70 25 550 75K .719 .781 1.062 1.938 .500
HS50 RE75 50 1250 200K 1.563 .844 1.968 2.781 .625
M-O
P/N
F
±.015
G
±.015
H
±.010
J
±.010
K
±.010
L
±.005
M
±.015
N
±.005
Mounting
Hole Size
HS5   .646 .317 .075 .145 .078 .093 .078 .050 #2
HS10  .812 .406 .100 .203 .093 .093 .094 .086 #2
HS25 1.094 .563 .094 .250 .171 .125 .125 .086 #2
HS50 1.156 .625 .094 .281 .196 .125 .125 .086 #4

70 to 250 Watt Resistor
Chassis mount units are designed for maximum heat dissipation mounting solidly to metal chassis surface for maximum heat transfer. They are outstanding for their high power dissipation with precision tolerances in minimum physical sizes.
Electrical Specifications
Resistance Range -.05 ohms to 50K ohms
Tolerance - 5%, 3%, 1%, .5%, .25%, .1%, .05%
Temperature Coefficient - ± 20 to 90 PPM
General Specifications
Lower hot spot ratings due to exclusive complete encapsulation of element within anodized aluminum body.
Welded construction throughout assures long stable load life.
Threaded heavy stud terminals
Temperature range -> -55°C to + 275°C
5500 VAC minimum dielectric strength
DIMENSIONS
M-O
P/N
MIL-PRF
18546
Com'l
Watts
Max. Working Voltage Max.
Res.
A
±.01
Aa
±.01
B
±.01
C
±.094
D
±.094
E
Ref
HS70 - 70 1400 275K 2.63 - 0.84 2.968 3.781 0.625
HS100 RE77 100 1900 50K 2.75 - 2.25 3.500 5.478 1.800
HS180 - 180 2100 50K 2.77 - 2.50 3.500 5.478 2.125
HS250 RE80 250 2300 45K 3.88 3.00 2.50 4.500 7.000 2.125
M-O
P/N
F
±.031
G
±.031
H
±.016
J
Ref.
K
±.031
L
±.01
M
Ref.
N
-
P
±.01
Screw
Size
HS70 1.156 0.625 0.094 0.281 0.196 0.125 0.125 0.09 - -
HS100 2.813 1.750 0.188 0.800 0.375 0.188 0.250 12/24 - #8
HS180 3.000 2.188 0.250 0.950 0.375 0.188 0.200 12/24 - #8
HS250 3.000 2.188 0.250 1.000 0.312 0.188 0.200 1/4/20 1.180 #8
DERATING
Power Rating
HS resistor curve D shown above is based on mounting to the following heat sink:
HS 5 & 10
4" x 6" x 2 .040" thick aluminum chassis (129 sq. in. surface area)
HS 25
5" x 7" x 2 .040" thick aluminum chassis (167 sq. in. surface area)
HS 50
12" x 12" x .059" thick aluminum panel (291 sq. in. surface area)
HS 100 & 250
12" x 12" x .125" thick aluminum panel (294 sq. in. surface area)

ORDERING INFORMATION
Example: 10W 10 ohm 5%
HS10
10R0
J
Type
Resistance
Tolerance
4 digit. <100 use R for decimal. >100 4th digit is multiplier
J = 5%
F = 1%
D = .5%
C = .25%
B = .1%
A = .05%
For Non-Inductive add "N" after Type
TO ORDER PRODUCT
E mail: microohm@mail.com
Call Toll Free: 1-800-845-5167
home page product guide R
axial
FP
flat oval
TL
tubular lug
CW bathtub axial SU bathtub printed circuit PI
radial
EW
edge
wound
RX
vitreous axial
CP
bare axial