Miniature Power Level Rotaries
Series MR
Distinctive Characteristics
Positive detent mechanism for distinct feel and audible feedback.
Metal bushing and housing construction increases
durability.
Adjustable stopper plate allows 2-8 position settings.
High contact reliability achieved by the self-cleaning
contact mechanism.
Break-before-make contact timing with various mechanism
types: sliding contacts in MRX, contactor dish in MRY, and
butt contacts in MRT models.
Terminal types include PC-turret for MRX, turret for MRY,
and solder lug for MRT models.
Molded-in PC-turret and turret terminals prevent entry of
flux and other contaminants.
Actual Size
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Miniature Power Level Rotaries
Series MR
General Specifications
Electrical Capacity (Resistive Load)
For MRX:
For MRY:
For MRT:
2A @ 125V AC or 1A @ 30V DC
For MRY106G: 0.4VA maximum @ 28V AC/DC maximum
(Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V)
Note: See Supplement Index to find explanation of operating range.
For all other MRY models: 3A @ 125V AC or 2A @ 30V DC
For MRT22: 10A @ 125V AC or 4A @ 30V DC
For MRT23: 5A @ 125V AC or 3A @ 30V DC
Other Ratings
Contact Resistance:
Insulation Resistance:
Dielectric Strength:
Mechanical Life:
Electrical Life:
Range of Operating Torque:
Contact Timing:
Indexing:
10 milliohms maximum for MRX, MRY, & MRT; 20 milliohms maximum for MRY106G
100 megohms minimum @ 500V DC for MRX & MRY
200 megohms minimum @ 500V DC for MRT
1,000V AC minimum for 1 minute minimum
15,000 operations minimum
7,500 operations minimum
0.03 ~ 0.15Nm for MRX; 0.02 ~ 0.10Nm for MRY; 0.02 ~ 0.05Nm for MRT
Nonshorting (break-before-make)
MRX: Self-cleaning, sliding contact; MRY: Rotary contactor dish; MRT: Butt contacts
45° for MRX; 60° for MRY; 120° for MRT22; 60° for MRT23
Materials & Finishes
Shaft:
Stopper Plate:
Bushing/Housing:
Movable Contacts:
End Contacts & Terminals:
Common Contacts & Terminals:
Base:
Brass with nickel plating
Steel with zinc plating for MRX & MRY
Brass with nickel plating
Silver alloy for MRX & MRT; copper with silver plating for MRY106;
copper with gold plating for MRY106G
Silver alloy & copper with silver plating for MRX & MRT; silver alloy plus brass with silver plating
for MRY106; silver alloy with gold plating for MRY106G
Copper with silver plating for MRX, MRY106 & MRT22; brass with gold plating for MRY106G;
brass with silver plating for MRT23
Phenolic resin
Environmental Data
Operating Temperature Range:
Humidity:
Vibration:
Shock:
–10°C through +70°C (+14°F through +158°F)
90 ~ 95% humidity for 96 hours @ 40°C (104°F)
10 ~ 55Hz with peak-to-peak amplitude of 1.5mm traversing the frequency range & returning in
1 minute; 3 right angled directions for 2 hours
50G (490m/s
2
) acceleration (tested in 3 right angled directions, with 3 shocks in each direction)
Installation
Mounting Torque:
Cap Installation Force:
Soldering Time & Temperature:
.686Nm (6.08 lb
•
in)
19.6 ~ 29.4N (4.41 ~ 6.61 lbf)
Manual Soldering: See Profile A in Supplement section.
Standards & Certifications
UL & C-UL
Recognized:
R
MRT22 models recognized at 10A @ 125V AC; MRT23 models recognized at 5A @ 125V AC
UL File No. WOYR2.E44145
Add “/U” to end of part number to order UL mark on switch
C-UL File No. WOYR8.E44145
Add “/C-UL” to end of part number to order C-UL mark on switch
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Miniature Power Level Rotaries
TYPICAL SWITCH ORDERING EXAMPLE
Series MR
MR
ACTUATORS & TERMINALS
X
108
204
402
108
POLES & CIRCUITS
A
SP with 2-8 Positions
DP with 2-4 Positions
4P with 2 Positions
A
KNOBS
Plain Black
Small Color Tipped
Large Color Tipped
B
C
COLORS
For Plain Knob
No
Code
A
Black
X
Shaft Actuated with
PC-Turret Terminals
For Color Tipped
Black
White
Red
Yellow
Green
Blue
Gray
B
C
E
F
G
H
Y
Shaft Actuated with
Turret Terminals
106
106G
SP with 2-6 Positions
SP with 2-6 Positions
Gold Contacts 0.4VA
T
Shaft Actuated with
Solder Lug Terminals
22
23
DPDT ON-NONE-ON
DPDT ON-OFF-ON
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
MRX108-A
IMPORTANT:
MRT switches are supplied
without UL marking unless
specified. Specific models
& ratings are noted on the
General Specifications page.
Shaft Actuated
with Plain Black Knob
SP with 2-8
Adjustable Positions
PC-Turret Terminals
ACTUATORS & TERMINALS
X
Shaft Actuated with
PC-Turret Terminals
Y
Shaft Actuated with
Turret Terminals
T
Shaft Actuated with
Solder Lug Terminals
2
1
8
1
(2.3)
.091
1
(2.3)
.091
6
(2.3)
.091
(5.0)
.197
(1.3) Dia
.051
MR
T- 2
2
(3.15) Dia
.124
(20.0)
.787
(5.0)
.197
(0.8)
.031
Thk = (0.9)
.035
(3.15) Dia
.124
(20.0)
.787
(3.15) Dia
.124
(20.0)
.787
(2.0)
.079
(4.0)
.157
(1.0)
.039
(1.0)
.039
(1.0)
.039
(2.4)
.094
(0.9)
.035
Thk = (0.7)
.028
Shaft
Terminal
Shaft
Terminal
Shaft
Terminal
03-07
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
Miniature Power Level Rotaries
POLES & CIRCUITS
Pole
Model
MRX108
SP
MRY106
MRY106G
DP
MRX204
2-6
2, 3, 4, 5, 6
1 COM, 6 LOAD
Number of Positions
2-8
Stopper Settings
2, 3, 4, 5, 6, 7, 8
Number of Terminals
1 COM, 8 LOAD
Series MR
Schematics
A
1
2 3 4 5 6
A
7 8
1
A
2 3 4 5 6
B
2-4
2, 3, 4
2 COM, 8 LOAD
1
2 3 4 1
2 3 4
MRT22
DPDT
MRT23
2
ON-NONE-ON
2-3
5-6
2-3
5-6
OPEN
OPEN
2-1
5-4
2-1
5-4
A
B
C
D
1
2
(COM)
3
4
5
6
3
ON-OFF-ON
4P
MRX402
2
1&2
4 COM, 8 LOAD
1
2
1
2
1
2
1
2
POSITION SETTING FOR MRX & MRY MODELS
Each switch is supplied with the stopper set for the maximum number of
positions allowed for that model. Prior to installation, the desired position
setting should be made. Contact factory for continuous rotation.
1. Using the actuator knob, turn the shaft counterclockwise to the extreme left.
If the shaft is not turned to this extreme position where the white line on the
knob points to the number 1 position shown on the side of the switch,
proper setting cannot be achieved.
2. Remove the knob from the shaft and loosen the nut far enough to allow
raising the stopper plate for resetting to the desired position.
3. Note the position numbers on the side of the switch; these correspond to
the terminal numbers and stopper holes. Insert the stopper in the hole
numbered for the maximum desired number of stop settings. Satisfactory
switch functioning cannot be assured if the stopper plate is not properly
positioned.
4. Tighten the nub (beveled side up) firmly against the stopper plate.
Mounting Hardware
Packaged Loose with Each Switch
AT513M Hex Face Nut
AT507M Locking Ring
AT509 Lockwasher
Factory Assembled:
Hex Nut
Stopper Plate
2
1
8
1
MRX
MRY
1
6
TYPICAL SWITCH DIMENSIONS
MRX • PC-Turret Terminals
Single, Double & Four Pole
A
5
4
90
°
Typ
2
(2.3)
.091
50
°
Keyway
(3.15) Dia
.124
(20.0)
.787
(5.6)
.220
(17.3)
.681
(10.0)
.394
MRX108
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
COM
B
1
4
(1.0)
.039
(5.0)
.197
2
A
1
4
3
3
(14.0) Dia
.551
B
1
2
(0.8) Typ
.031
D
1
COM
COM
1
8
M6 P0.75
(0.9) Typ
.035
22.5
°
3
7
(1.5) Typ
.059
1
2
C
1
45
°
Typ
6
2
2
(0.5) Typ
.020
2
(4.0) Dia
.157
Miniature Power Level Rotaries
TYPICAL SWITCH DIMENSIONS
MRY • Turret Terminals
(3.15) Dia
.124
M6 P0.75
Series MR
Single Pole
(1.3) Dia Typ
.051
4
5
60
°
Ty
60
°
Typ
3
4
A
2
1
6
5
p
3
(9.0) Dia
.354
A
(2.3)
.091
18
°
Keyway
(1.0)
.039
(20.0)
.787
(5.6)
.220
(16.9)
.665
(5.0)
.197
(8.0)
.315
(14.0) Dia
.551
MRY106
MRT • Solder Lug Terminals
(5.0)
.197
(24.0)
.945
120°
(2.3)
.091
Double Pole
M6 P0.75
(3.15) Dia
.124
Keyway
(4.5)
.177
4
5
6
MRT22
(13.0)
.512
(20.0)
.787
(7.5)
.295
(8.5)
.335
(12.0)
.472
PC FOOTPRINTS FOR MRX SINGLE, DOUBLE, & FOUR POLE
°
Typ
45
22.5
°
°
Typ
45
22.5
°
Single Pole
4
5
(1.98) Dia
.078
A
6
7
Double Pole
4
1
(10.0) Dia
.394
(4.5) Dia
.177
3
2
8
(10.0) Dia
.394
(1.32) Dia Typ
.052
A
3
B
2
4
2
(1.98) Dia Typ
.078
3
Four Pole
1
2
1
(4.5) Dia
.177
1
(1.32) Dia Typ
.052
KNOBS
A
AT433
Plain Black
(19.0) Dia
.748
(11.0) Dia
.433
(13.0)
.512
B
AT4103 Small
Color Tipped
C
(16.0) Dia
.630
(9.5) Dia
.374
AT4104 Large
Color Tipped
Material:
Polyacetal
Color:
Black
only
(9.5)
.374
(0.5)
.020
Base Material:
Polyester
Base Color:
Black
Polyamide Tip
Colors:
A, B, C, E, F, G, H
(14.3)
.563
(9.5)
.374
(0.5)
.020
Base Material:
Polyester
Base Color:
Black
Polyamide Tip
Colors:
A, B, C, E, F, G, H
Color Codes:
A
Black
B
White
C
Red
E
Yellow
F
Green
PANEL CUTOUTS & MAXIMUM EFFECTIVE PANEL THICKNESS
Without
Keyway
(6.35) Dia
.250
(2.2) Dia
.087
(6.5)
.256
With
Keyway
(6.35) Dia
.250
(5.6)
.220
(0.6)
.024
Maximum Effective Panel Thickness
With Standard Hardware: MRX & MRY .095” (2.4mm); MRT .106” (2.7mm)
Without Locking Ring: MRX & MRY .126” (3.2mm); MRT .138” (3.5mm)
03-07
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
1
M
CO
6
(1.1) x (2.0) Typ
.043 x .079
2
(1.85) Dia Typ
.073
3
2
1
(4.0)
.157
°
Typ
45
22.5
°
90
°
T
(10.0) Dia
.394
C
1
B
2
A
D
1
2
2
(1.98) Dia Typ
.078
1
yp
(4.5) Dia
.177
(1.32) Dia Typ
.052
(18.0) Dia
.709
(11.0) Dia
.433
(15.8)
.622
(9.5)
.374
(0.5)
.020
G
Blue
H
Gray
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