Model E
D
0.25"
6.35 mm
unenclosed
0.125"
3.18 mm
0.625"
15.88 mm
B
0.531"
shaft
13.49 mm
locking
nut
(Potentiometers) Wirewound
C
0.078"
1.98 mm
locking
shaft
0.406"
10.32 mm
D
B
D
Dimension “M”
P
0.875” 22.23 mm
N
1.188” 30.16 mm
R
1.5”
38.1 mm
U
3”
76.2 mm
Mounting:
Panels
to 1.25” (31.75mm)
thick with 0.25-20
flat-head screws.
C
0.875"
22.23 mm
0.125"
3.18 mm
Rheostats
Locking
shaft
standard
shaft
0.25"
6.35 mm
Mounting:
Panels to
0.125” (3.18mm) thick
enclosed
with 0.25-32 bushing and
hex nut (0.063” thick).
0.094"
2.38 mm
Model C
0.531"
13.49 mm
Mounting:
Panels
to 0.125” (3.18mm)
thick with 0.25-32
bushing and hex
0.25"
6.4 mm
nut (0.063” thick).
B
0.625"
0.625"
15.88 mm 15.88 mm
Models P, N, R, U
M
M
2"
51 mm
B
0.375"
9.53 mm
D
0.031"
0.79 mm
0.25"
6.4 mm
0.25"
6.4 mm
0.109"
2.78 mm
Standard
shaft
Models H, J, G, K, L
0.031"
0.79 mm
0.25"
6.35 mm
0.375"
9.53 mm
0.75"
19.05 mm
bushing
projection
0.625"
15.88 mm
holes for
no. 8 screws
0.25 - 20 thread for
mounting screws
1.563"
39.7 mm
0.5"
12.7 mm
D
O R D E R I N G I N F O R M AT I O N
Series
Rheostats
Wirewound
Potentiometers
E = RoHS compliant
RCSR50E
Resistance Value*
Example:
R50
=
0.50Ω
1R0 = 1Ω
7R5
=
7.5Ω
250
=
250Ω
1K0
= 1,000Ω
1K75
=
1,750Ω
4K5
=
4,500Ω
50K
=
50,000Ω
*Check Table for
Standard
Resistance Values
and Maximum
Current Values
drill 0.188"
(4.76 mm) hole
in panel
holes for:
no. 2 screws (model H)
no. 8 screws (J, G, K, L) mounting
bracket on
model L only
0.031"
0.79 mm
0.344"
8.73 mm
0.875"
22.23 mm
0.063"
1.59 mm
B
C
shaft
locking
nut
locking shaft
(only model H
stocked)
Code Watts Model Shaft
Core
CL
=
7.5
C
Locking Enclosed
CS
=
7.5
C Standard Enclosed
EE
=
12.5
E Standard Enclosed
EL
=
12.5
E
Locking
Open
ES
=
12.5
E Standard
Open
GS
=
75
G Standard
Open
HL =
25
H
Locking
Open
HS =
25
H Standard
Open
JS =
50
J Standard
Open
KS
=
100
K Standard
Open
LS =
150
L
Standard
Open
NS
=
300
N Standard
Open
PS =
225
P
Standard
Open
RS =
500
R
Standard
Open
US
= 1000
U Standard
Open
standard shaft
(models H, J, G, K, L)
Mounting:
Panels to 0.25” (6.35mm) thick with 0.375-32 bushing and hex nut
(0.094” thick) (or with 10-32 x 0.75 F.H. screws for model L only).
Dimensions for reference only; consult factory for details.
Since all rheostats/potentiometers are electro-mechanical devices, they
are subject to mechanical wear and, therefore, have a finite life.
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.
All rheostats are 10% tolerance.
See page 82 for
knobs, dials, and
other hardware
Model Type
E
RES/REL
H
RHS/RHL
J
RJS
G
RGS
K
RKS
L
RLS
P
RPS
N
RNS
R
RRS
U
RUS
C
RCS/RCL
E
REE
Watts
12.5
25
50
75
100
150
225
300
500
1000
7.5
12.5
Ohmic
range
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
Max. Voltage
Core
(RMS)*
open
305
open
500
open
750
open
900
open
1000
open
1200
open
1300
open
1225
open
1450
open
1600
enclosed
305
enclosed
305
Behind panel
“B” (In./mm)
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
Diameter
“D” (In./mm)
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
Dimension
“C” (In./mm)
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
—
—
Shaft torque
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.
Rotation
(±5°)
300°
300°
300°
300°
300°
300°
310°
320°
325°
335°
300°
300°
• 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
77
OHMITE [ OHMITE MFG. CO. ]
