unenclosed
0.625"
15.88 mm
0.531"
shaft
Model E
13.49 mm locking
nut
Rheostats
D
B
0.125"
3.18 mm
(Potentiometers) Wirewound
0.25"
6.35 mm
C
standard
shaft
locking
shaft
0.531"
13.49 mm
Model C
0.25"
0.078"
0.406"
6.35 mm
1.98 mm
Mounting: Panels to
0.125” (3.18mm) thick
with 0.25-32 bushing and
hex nut (0.063” thick).
10.32 mm
Mounting: Panels
to 0.125” (3.18mm)
thick with 0.25-32
bushing and hex
nut (0.063” thick).
Locking
shaft
enclosed
D
0.25"
6.4 mm
B
0.094"
2.38 mm
0.625"
0.625"
B
15.88 mm 15.88 mm
D
0.125"
3.18 mm
Dimension “M”
0.875” 22.23 mm
1.188” 30.16 mm
Models P, N, R, U
P
N
R
U
2"
51 mm
M
M
B
Standard
shaft
1.5”
3”
38.1 mm
76.2 mm
0.25"
0.25"
6.4 mm
0.109"
2.78 mm
6.4 mm
Mounting: Panels
to 1.25” (31.75mm)
thick with 0.25-20
flat-head screws.
0.375"
9.53 mm
D
Models H, J, G, K, L
0.031"
0.375"
9.53 mm
0.75"
19.05 mm
C
0.875"
22.23 mm
0.79 mm
0.031"
bushing
0.79 mm
projection
0.625"
0.25"
6.35 mm
holes for
no. 8 screws
0.25 - 20 thread for
mounting screws
1.563"
15.88 mm
39.7 mm
D
0.5"
12.7 mm
0.031"
C
O R D E R I N G I N F O R M AT I O N
0.79 mm
drill 0.188"
(4.76 mm) hole
in panel
shaft
locking
nut
E = RoHS compliant
0.344"
8.73 mm
Series
Rheostats
0.063"
Wirewound
Potentiometers
R C S R 5 0 E
holes for:
1.59 mm
locking shaft
(only model H
stocked)
0.875"
22.23 mm
no. 2 screws (model H)
no. 8 screws (J, G, K, L)
B
Resistance Value*
mounting
bracket on
model L only
Code Watts Model Shaft
Core
Example:
standard shaft
CL =
CS =
EE =
EL =
ES =
GS=
HL =
HS =
JS =
KS =
LS =
NS =
PS =
RS =
7.5
7.5
12.5
12.5
12.5
75
C
C
E
E
E
G
H
H
J
Locking Enclosed
Standard Enclosed
Standard Enclosed
Locking
Standard
Standard
Locking
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
R50
1R0
7R5
250
1K0
=
=
=
=
=
0.50Ω
1Ω
(models H, J, G, K, L)
7.5Ω
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Mounting: Panels to 0.25” (6.35mm) thick with 0.375-32 bushing and hex nut
250Ω
1,000Ω
1K75 = 1,750Ω
(0.094” thick) (or with 10-32 x 0.75 F.H. screws for model L only).
25
4K5
= 4,500Ω
25
50
50K = 50,000Ω
Dimensions for reference only; consult factory for details.
100
K
L
N
P
R
U
*Check Table for
Standard
Resistance Values
and Maximum
Current Values
Since all rheostats/potentiometers are electro-mechanical devices, they
See page 82 for
150
300
225
500
are subject to mechanical wear and, therefore, have a finite life.
knobs, dials, and
Models H, J, K, L and N are listed under UL Reexamination Service File
No. E-10946 and CSA File No. 21309 unless noted otherwise.
other hardware
US = 1000
All rheostats are 10% tolerance.
Ohmic
Max. Voltage
(RMS)*
Behind panel
Diameter
Dimension
Rotation
Model Type
Watts
12.5
25
range
Core
open
open
open
open
open
open
open
open
open
open
“B” (In./mm)
“D” (In./mm) “C” (In./mm)
Shaft torque
(±±5)
300°
300°
300°
300°
300°
300°
310°
320°
325°
335°
300°
300°
E
H
J
RES/REL
RHS/RHL
RJS
1.0-15K
1.0-25K
0.5-50K
0.5-50K
0.5-50K
0.5-50K
1.0-30K
1.0-50K
1.0-20K
1.0-20K
10.0-5K
1.0-15K
305
500
750
0.688/17.46
1.375/34.93
1.375/34.93
1.750/44.45
1.750/44.45
2.000 / 50.8
2.125/53.98
2.375/60.33
2.125/53.98
3.000 / 76.2
0.875/22.23
1.219/30.96
0.875/ 22.23
1.560/ 39.62
2.31 / 58.67
2.75 / 69.25
3.125/ 79.38
4.00 /101.60
5.00 /127.00
6.00 /152.40
8.00 /203.20
12.00 /304.80
0.515/ 13.08
1.047/ 26.59
0.594/15.08
0.940/23.88
1.56 /39.62
1.78 /45.21
1.91 /48.51
2.28 /57.91
2.97 /75.44
3.44 /87.38
4.31/109.47
6.38/162.05
—
1-6 oz. in.
0.25-0.5 lb. in.
0.25-2 lb. in.
0.5-2 lb. in.
0.5-2 lb. in.
0.5-3 lb. in.
2.5-4 lb. in.
2.5-5 lb. in.
4.5-7 lb. in.
3.5-7 lb. in.
0.25-3 oz. in.
1-6 oz. in.
50
75
G
K
L
RGS
RKS
RLS
900
100
150
225
300
500
1000
7.5
1000
1200
1300
1225
1450
1600
P
N
R
U
C
E
RPS
RNS
RRS
RUS
RCS/RCL
REE
enclosed
enclosed
305
305
12.5
—
• Models H, J, G, and K also available in enclosed versions.
• See Catalog #203 for complete details.
• RoHS compliant product available. Add “E” suffix to part number to specify.
• Made-to-order rheostats available: Contact nearest Ohmite sales office.
* Voltage rating dependent on resistance value.
Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
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