Series MR
Toggles
Miniature Power Level Rotaries
Rockers
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
Programmable Illuminated PB
Pushbuttons
Other Ratings
Contact Resistance:
Insulation Resistance:
Keylocks
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
Rotaries
G
Materials & Finishes
Slides
Shaft:
Stopper Plate:
Bushing/Housing:
Movable Contacts:
End Contacts & Terminals:
Tactiles
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
Tilt
Operating Temperature Range:
Humidity:
Vibration:
Shock:
Touch
–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
Indicators
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.
Accessories
Standards & Certifications
UL:
File No. E44145 - Recognized only when ordered with marking on switch.
Add “/U” or “/CUL” before dash in part number to order UL recognized switch.
MRT22 models recognized at 10A @ 125V AC; MRT23 models recognized at 5A @ 125V AC
Supplement
G22
www.nkkswitches.com
Miniature Power Level Rotaries
Series MR
Toggles
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.
G
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
www.nkkswitches.com
G23
Supplement
Accessories
Indicators
Touch
Tilt
Tactiles
Slides
Rotaries
Keylocks
Programmable Illuminated PB
Pushbuttons
Rockers
Distinctive
Characteristics
Series MR
Toggles
Miniature Power Level Rotaries
TYPICAL SWITCH ORDERING EXAMPLE
Rockers
MR
Actuators & Terminals
X
108
204
402
106
106G
22
23
108
Poles & Circuits
A
SP with 2-8 Positions
DP with 2-4 Positions
4P with 2 Positions
SP with 2-6 Positions
SP with 2-6 Positions
Gold Contacts 0.4VA
DPDT ON-NONE-ON
DPDT ON-OFF-ON
A
Knobs
Plain Black
Small Color Tipped
Large Color Tipped
B
C
Pushbuttons
Colors
For Plain Knob
No
Code
A
Black
X
Programmable Illuminated PB
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
T
Shaft Actuated with
Solder Lug Terminals
Keylocks
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
MRX108-A
Rotaries
G
Shaft Actuated
with Plain Black Knob
IMPORTANT:
MRT Switches are supplied without UL & cULus marking
unless specified.
UL & cULus recognized only when ordered with marking
on the switch.
Specific models, ratings, & ordering instructions are noted
on the General Specifications page.
Slides
SP with 2-8
Adjustable Positions
Tactiles
PC-Turret Terminals
Tilt
ACTUATORS & TERMINALS
Touch
X
Shaft Actuated with
PC-Turret Terminals
Y
Shaft Actuated with
Turret Terminals
T
Shaft Actuated with
Solder Lug Terminals
Indicators
(3.1)
.122
(2.28)
.090
(3.1)
.122
(2.28)
.090
(3.1)
.122
(2.28)
.090
Accessories
2
1
8
1
(20.0)
.787
(5.0)
.197
(0.8)
.031
Thk = (0.9)
.035
1
6
(20.0)
.787
(5.0)
.197
(1.3) Dia
.051
(20.0)
.787
MR
T- 2
2
(2.0)
.079
(4.0)
.157
Supplement
(1.0)
.039
(1.0)
.039
(1.0)
.039
(2.4)
.094
(0.9)
.035
Thk = (0.7)
.028
Shaft
G24
Terminal
Shaft
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Terminal
Shaft
Terminal
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
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
AT509 Lockwasher
Factory Assembled:
Hex Nut
Stopper Plate
G
1
8
MRX
MRY
1
6
Single, Double & Four Pole
A
5
4
MRX • PC-Turret Terminals
22.5
°
3
90
°
Typ
2
2
C
1
(2.28)
.090
(3.1)
.122
(20.0)
.787
(5.7)
.224
(17.3)
.681
(10.0)
.394
(14.0) Dia
.551
MRX108
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G25
Supplement
COM
B
1
4
50
°
Keyway
2
A
1
4
3
(1.0)
.039
(5.0)
.197
3
B
1
2
(0.8) Typ
.031
(4.0) Dia
.157
Accessories
D
1
COM
COM
M6 P0.75
(0.9) Typ
.035
45
°
(1.5) Typ
.059
1
Typ
(0.5) Typ
.020
Indicators
7
6
Touch
2
TYPICAL SWITCH DIMENSIONS
Tilt
2
1
Tactiles
Slides
AT507M Locking Ring
Rotaries
Keylocks
Programmable Illuminated PB
2-4
2, 3, 4
2 COM, 8 LOAD
Pushbuttons
Rockers
Toggles
2
1
8
2
Series MR
Toggles
Miniature Power Level Rotaries
TYPICAL SWITCH DIMENSIONS
MRY • Turret Terminals
Rockers
Single Pole
Pushbuttons
(3.1)
.122
M6 P0.75
(1.3) Dia Typ
.051
4
5
M
60
°
Ty
60°
3
4
A
2
1
6
Typ
p
3
(9.0) Dia
.354
5
A
2
Programmable Illuminated PB
(2.28)
.090
18
°
Keyway
(20.0)
.787
(1.0)
.039
(5.6)
.220
(16.9)
.665
(5.0)
.197
(8.0)
.315
(14.0) Dia
.551
MRY106
Keylocks
MRT • Solder Lug Terminals
Double Pole
120
°
POS 1
POS 2
(2.28)
.090
M6 P0.75
Rotaries
G
(5.0)
.197
(3.1)
.122
Keyway
Slides
(4.5)
.177
4
5
6
Tactiles
(13.0)
.512
(20.0)
.787
(7.5)
.295
(8.5)
.335
(12.0)
.472
MRT22
Tilt
MRT • Solder Lug Terminals
POS 2
Double Pole
Touch
POS 1
(5.0)
.197
°
60
60
°
POS 3
(2.28)
.090
M6 P0.75
Indicators
(3.1)
.122
(4.0)
.157
4
5
6
Keyway
Accessories
(1.1) x (2.0) Typ
.043 x .079
(13.0)
.512
(20.0)
.787
(7.5)
.295
(8.5)
.335
(12.0)
.472
Supplement
MRT23
G26
www.nkkswitches.com
1
CO
6
(1.85) Dia Typ
.073
(24.0)
.945
(4.0)
.157
(1.1) x (2.0) Typ
.043 x .079
3
2
1
(23.5)
.925
3
2
1
(13.0)
.512
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