®
CTS 212 Rotary
Switches
• Hill and valley detent
• Balanced double bump detent spring
• Excellent feel
• 30˚ or 60˚ indexing
• Spring return styles available
• Adjustable stop available
• Solder lug and printed circuit terminals available
• Molded stator prevents solder from flowing into
the circuit
• Custom switching patterns available
• Index or wafers are available separately
Series 212
Electrical and Mechanical Specifications
Indexing
Double bump spring hill and valley detent with standand
30° indexing for 2 through 12 positions or with special
60° indexing from 2 to 6 positions.
Special 90° indexing consult CTS
Voltage and Current Rating
UL Rating: 3/4 amp at 125 VAC (shorting type only)
Special Rating: 1/4 amp at 28 VDC (shorting or non shorting)
1 amp at 28 VDC (shorting type only)
Contact Resistance
15 milliohms max. when measured from adjacent terminals
Stop Strength
15 in-lb (17.3Kgf-cm).
Torque
Up to 48 in-oz. (3.5Kgf-cm).
Detent Rotational Life
Standard:25,000 cycles through 12 positions and
return at 10 cycles per minute.
Materials
Shaft:Aluminum or unplated brass at CTS option
Bushing:Standard — Brass
Detent Spring: Spring brass or nickel silver depending
on torque requirements
Front Plate: Zinc plated or nickel plated plated steel at CTS option
Rotor Contacts, Stator Contacts and Terminals: Silver plated
brass standard
Stator Insulator: Glass reinforced thermoset material
Bushing Lengths
Standard: 3/8"-32 UNEF-2A Thread,1/4" (6.35mm)
or 3/8" (9.53mm) long.
Special Lengths: Available as required
Locating Lugs
Standard:Left side .531" (13.5mm) radius
Special:Right side .531" (13.5mm) radius or no lug
Shaft Trim
Standard:Plain round
Special:Flat, slot, knurl, or mixed (flat with slot)
Frames
Machine screw, bolt & nut, or rivet construction
Lubrication
Special lubrication is used sufficient for the life
of the index assembly under normal hand operation.
Features
1 - 3
CTS Electronic Components www.ctscorp.co m
• RoHS compliant
01/19/07
© 2007 CTS Corporation. All rights reserved. Information subject to change.
Physical Dimensions
DIMENSION: mm
INC H
Available Terminal Styles
5 9 . 9 3
0 .
1
2
4 4 .
7
1
7 8 6 .
7 2 8 .
3 7 5 . 1
5.74
.226 (7)
8
9
.
6 2
2
3
.
3 3
2
1 3 . 1
2
6 0 . 1
Ø38.76 TO OUTSIDE
OF TERMINALS
1.526
.116±.002
X-Style
T-Style
4
4
.
7 1
4
4
.
6 3
7 . 3
3
3 4 . 1
7 8
6
.
6 4 1 .
38.0
1.496
2.54
.100 (13)
P-Style
Y-Style
2
.
6
2
4
4
.
7
1
1
.
2 2
36.6
1.44
3
0
.
1
0
7
8
.
7
8 6 .
4.46
#4-40 PANHEAD SCREWS
2-CLEARANCE HOLES FOR
13.49
26.98
15°
R15.09
Ø1.98
AS REQUIRED
HOLE @ 15°
P.C. BOARD
MOUNTING HOLE
.531
1.062
.076
.594
U-Style
.176
4.95
7.09
7.88
.310
.279
.279
2.79
1.28
.110
.050
DIMENSION: mm
INC H Typical Assembled Switch
Detent Only
6.35
.250
*
9.12
.359
1.98
.078
L
A
10.82
.426 *
11.35
.447
6.35
.250
3.18
.125
ARE AVAILABLE TO PROVIDE PIN SPACINGS AS REQ'D
SPACE NO SPACERS OR SPACERS OF NUMEROUS LENGTHS
10.82/.426 DIMENSION BASED UPON USE OF ONE 6.35/.250
* NOTE :
5 3 . 6 Ø
3.56
1.98
7.12
"A"±
"L"±
2 . 3
13.5
0.8
.031
0 5
2
.
.140
.078
.280
.016
0.4
.531
5 2
1
.
8 9 . 6 2
3 . 3 3
2 6 0 . 1
2
1
3
.
1
28.6
1.125
2 - 3
CTS Electronic Components www.ctscorp.co m
Ø2.94±0.05 (2)THR. HOLE
3/8"-32 UNEF 2A THD.
01/19/07
© 2007 CTS Corporation. All rights reserved. Information subject to change.
CONTACT TYPE
– NON SHORTING
SHAFT FMS
1/32" INCREMENTS
20 – .625" (15.9mm)
24 – .750" (19.1mm)
28 – .875" (22.2mm)
32 – 1.000" (25.4mm)
POLES
01 – 1 POLE
10 – 10 POLES
ETC.
TERMINAL STYLE
T – SOLDER LUG
X – PC
U – PCFORMED
TO REAR
P – PC WITH
.100" (2.54mm)
SPACING
SPECIALS
N – NONE
–
D NO
LOCATING
LUG
E – LOCATING
LUG RIGHT
SIDE
SHAFT TRIM
R – ROUND
F – FLATTED .375" X .156"
(9.53mm X 4.0mm)
K – KNURLED EIA S148(24 TEETH)
S – SD SLOT .047" WIDE X .063" DEEP
(1.2mm X 1.6mm)
M – FLATTED .375” X .218”
(9.53mm X 5.54mm) WITH SLOT
POSITIONS
02 – 2 POSITIONS
12 – 12 POSITIONS,
ETC.
MOUNTING STYLE
BUSHING LENGTH:
1/8" INCREMENTS
EXAMPLES:
2 – .250" (6.35mm)
3 – .375" (9.5mm)
BUSHING MOUNT
SUPPLIED WITH
LOCATING LUG
LEFT SIDE
TERMINALS DOWN
Ordering Information
T 0 1 0 2 N 2 2 0 R N
21 2
Y – X STYLE WITH
.870" (22.1mm)
MEIGHT STAND OFF.
N
(BREAK BEFORE MAKE)
S – SHORTING
(BREAK BEFORE MAKE)
INDEX OR
ADJUSTABL STOP
1 – 60° INDEX
1
BLANK
– STANDARD
– 2 30° INDEX
WITH
ADJUSTABLE
STOP
– 3 60° INDEX
WITH
ADJUSTABLE
STOP
3 - 3
CTS Electronic Components www.ctscorp.c o m
01/19/07
© 2007 CTS Corporation. All rights reserved. Information subject to change.
