The HS/HSN Series offers
greater power capacity (100
and 250 watts) in the same
design format as Ohmite’s 89
Series.
HS/HSN Series maintains
the same construction, materi-
als,
and manufacturing tech-
niques as the 89 Series. As
a made-to-order product, it is
recommended for higher vol-
ume applications.
speCIFICatIons
Material
Housing:
Aluminum with hard
anodic coating.
Internal Coating:
Silicone.
Core:
Ceramic.
Terminals:
Solder-coated axial
Derating:
Linearly from
100% @ +25°C to 0% @
+275°C.
L
aluminum Housed axial terminal
K
M
J
Wirewound, Industrial/Commercial Grade
100 & 250 watt
D
C
A
M
E
L
J
K
nickel-plated brass nut,
stainless steel stud
BF
N
G
I
H
HS/HSN Series
E
BF
D
C
A
N
G
I
H
Electrical
Features
• Standard winding (Model HS)
• Non-inductive winding (Model
HSN)
• Molded construction for total
environmental protection
• Complete welded construction
• Mounts on chassis to utilize
heat-sink effect
• High stability at conventional
power ratings
• Flat marking surface for easy
identification
• RoHS compliant; add “E” suffix
to part number to specify.
Tolerance:
±1% and ±5% (other
tolerances available).
Power rating:
Rating is based
on chassis mounting area and
temperature stability. Proper heat
sink: 12” x 12” x 0.125 Aluminum
panel.
Maximum ohmic values:
See chart.
Overload:
5 times rated wattage
for 5 seconds.
Temperature coefficient:
Under 1Ω: ±90 ppm/°C
1 to 9.99Ω: ±50 ppm/°C
10Ω
and over: ±30 ppm/°C.
Dielectric withstanding voltage:
4500VAC.
series
Hs100
Hsn100
Hs250
Hsn250
power rating
(Watts)
100
100
250
250
resistance range
(ohms)
.05 - 29.4K
1.0 - 14.7K
.10 - 35.7K
1.0 - 17.4K
Max. Working
Voltage
1900
1350
2300
1625
Dimensions
in.
(mm)
Dim. A
Dim. B
Dim. C
Dim. D
Dim. E
Dim. F
Dim. G
Dim. H
Dim. I
Dim. J
Dim. K
Dim. L
Dim. M
Dim. N
Hs100 / Hsn100
100 watt
2.75 ± .010
(69.85 ± .254)
2.25 ± .010
(57.15 ± .254)
3.50 ± .031
(88.90 ± .787)
5.478 ± .093
(139.14 ± 2.36)
1.812 ± .031
(46.02 ± .787)
2.812 ± .031
(71.42 ± .787)
1.75 ± .031
(44.45 ± .787)
1.88 ± .031
(4.78 ± .787)
0.770 ± .015
(19.56 ± .381)
0.375 ± .031
(9.52 ± .787)
0.188 ± .010
(4.78 ± .254)
0.219 ± .031
(5.56 ± .787)
12 - 24 UNC - 2A THD
0.989 ± .031
(25.12 ± .787)
Hs250 / Hsn250
250 watt
3.875 ± .010
(98.425 ± .254)
2.5 ± .010
(63.50 ± .254)
4.5 ± .031
(114.30 ± .787)
6.73 ± .093
(170.94 ± 2.36)
2.125 ± .031
(53.98 ± .787)
3.0 ± .031
(76.20 ± .787)
2.188 ± .031
(55.58 ± .787)
0.250 ± .031
(6.35 ± .787)
0.955 ± .015
(24.26 ± .381)
0.312 ± .031
(7.92 ± .787)
0.188 ± .010
(4.78 ± .254)
0.25 ± .031
(6.35 ± .787)
1/4 - 20 UNC - 2A THD
1.25 ± .031
(31.75 ± .787)
100
D e r at i n g C u r v e
80
Percent Rated Watts
Mounted
to
aluminum chassis
60
40
Unmounted
20
0
0
25
50
75 100 125 150 175 200 225 250 275
Ambient Temperature,
°C
o r D e r i n g i n F o r m at i o n
HSN100JR05E
Series
Wattage Tolerance Ohms
F = 1%
100
R05
=
J = 5%
250
1R0 =
K=10%
10R =
100 =
10K =
14K7
=
RoHS
0.05Ω
Compliant
1.0Ω
10Ω
100Ω
10,000Ω
14,700Ω
Non-Inductive Winding
Optional (blank = std. winding)
Check product availability at
www.ohmite.com
to see the latest in resistor
technology click on the “What’s
new” tab at ohmite.com
Ohmite Mfg. Co.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
27
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