Ohmite Mfg. Co.

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27

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.

Fea tures

• 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.

HS/HSN Series

aluminum Housed axial terminal

Wirewound, Industrial/Commercial Grade

s pe CIFIC a t I ons

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.

Electrical

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 1

Ω: ±90 ppm/°C

1 to 9.99

Ω: ±50 ppm/°C

10

Ω and over: ±30 ppm/°C.

Dielectric withstanding voltage:

4500VAC.

power rating

resistance range

Max. Working

series

(Watts)

(ohms)

Voltage

Hs100

100

.05 - 29.4K

1900

Hsn100

100

1.0 - 14.7K

1350

Hs250

250

.10 - 35.7K

2300

Hsn250

250

1.0 - 17.4K

1625

A

C

D

N

B F

E

I

H

G

M

K

J

L

A

C

D

N

B F

E

I

H

G

K

J

L

M

nickel-plated brass nut,

stainless steel stud

25 & 50 watt

100 & 250 watt

100

Ambient Temperature,

°C

60

20

0

0

150

50

275

80

40

25

100

200

250

175

75

125

225

Unmounted

Mounted to

aluminum chassis

Dera ting Curve

D imensions

Hs100 / Hsn100

Hs250 / Hsn250

in. (mm)

100 watt

250 watt

Dim. A

2.75 ± .010 (69.85 ± .254)

3.875 ± .010 (98.425 ± .254)

Dim. B

2.25 ± .010 (57.15 ± .254)

2.5 ± .010 (63.50 ± .254)

Dim. C

3.50 ± .031 (88.90 ± .787)

4.5 ± .031 (114.30 ± .787)

Dim. D

5.478 ± .093 (139.14 ± 2.36)

6.73 ± .093 (170.94 ± 2.36)

Dim. E

1.812 ± .031 (46.02 ± .787)

2.125 ± .031 (53.98 ± .787)

Dim. F

2.812 ± .031 (71.42 ± .787)

3.0 ± .031 (76.20 ± .787)

Dim. G

1.75 ± .031 (44.45 ± .787)

2.188 ± .031 (55.58 ± .787)

Dim. H

1.88 ± .031 (4.78 ± .787)

0.250 ± .031 (6.35 ± .787)

Dim. I

0.770 ± .015 (19.56 ± .381)

0.955 ± .015 (24.26 ± .381)

Dim. J

0.375 ± .031 (9.52 ± .787)

0.312 ± .031 (7.92 ± .787)

Dim. K

0.188 ± .010 (4.78 ± .254)

0.188 ± .010 (4.78 ± .254)

Dim. L

0.219 ± .031 (5.56 ± .787)

0.25 ± .031 (6.35 ± .787)

Dim. M

12 - 24 UNC - 2A THD

1/4 - 20 UNC - 2A THD

Dim. N

0.989 ± .031 (25.12 ± .787)

1.25 ± .031 (31.75 ± .787)

or D ering in F orma tion

Series

Ohms

R05 = 0.05

Ω

1R0 = 1.0

Ω

10R =10

Ω

100 =

100

Ω

10K = 10,000

Ω

14K7 = 14,700

Ω

RoHS

Compliant

Tolerance

F = 1%

J = 5%

K=10%

Non-Inductive Winding

Optional (blank = std. winding)

Wattage

100

250

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