Series MRB
Toggles
Miniature PCB Process Sealed Rotaries
Rockers
General
Specifications
Electrical Capacity (Resistive Load)
Logic Level:
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.
Pushbuttons
Programmable Illuminated PB
Other Ratings
Contact Resistance:
Insulation Resistance:
Dielectric Strength:
Mechanical Life:
Electrical Life:
Operating Torque:
Contact Timing:
Indexing:
80 milliohms maximum
100 megohms minimum @ 500V DC
500V AC minimum for 1 minute minimum
30,000 operations minimum
10,000 operations minimum
0.04Nm average
Nonshorting (break-before-make)
45° for On-On-On & 90° for On-None-On
Keylocks
Materials & Finishes
G
Shaft:
Bushing:
Frame/Bracket:
Movable Contacts:
Stationary Contacts:
Terminals:
Base:
Brass with nickel plating
Zinc alloy with nickel plating
Steel with tin plating
Beryllium copper spring with gold plating
Copper with gold plating
Brass with tin plating
Polyamide
Slides
Rotaries
Environmental Data
Tactiles
Operating Temperature Range:
Humidity:
Vibration:
Shock:
Sealing:
–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 5 shocks in each direction)
Use of optional o-ring AT535 with MRB meets IP67 of IEC60529 specifications
Tilt
Installation
Mounting Torque:
Cap Installation Force:
.686Nm (6.08 lb
•
in)
19.6 ~ 29.4N (4.41 ~ 6.61 lbf)
Touch
PCB Processing
Soldering:
Cleaning:
Indicators
Wave Soldering Recommended: See Profile B in Supplement section
Manual Soldering: See Profile B in Supplement section
Automated cleaning. See Cleaning specifications in Supplement section.
Accessories
Standards & Certifications
The MRB Series rotaries have not been tested for UL recognition or CSA certification.
These switches are designed for use in a low-voltage, low-current, logic-level circuit.
When used as intended in a logic-level circuit, the results do not produce hazardous energy.
Supplement
G28
www.nkk.com
Miniature PCB Process Sealed Rotaries
Series MRB
Toggles
Positive detent mechanism for distinct feel and audible
feedback.
Break-before-make contact timing with sliding
contact mechanism.
Metal bushing and frame/bracket provide
durability.
Panel seal, achieved with use of optional
exterior o-ring, conforms to IP67 of IEC60529
Standards.
High contact reliability achieved by the self-cleaning
contact mechanism.
.100” x .100” (2.54mm x 2.54mm) terminal spacing conforms to
standard PC board grid spacing for straight and right angle mounting.
Actual Size
G
Insert molded terminals lock out flux and other contaminants.
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G29
Supplement
Accessories
Indicators
Touch
Tilt
Tactiles
Slides
Rotaries
Keylocks
Programmable Illuminated PB
Totally sealed construction, achieved with combination of an
interior o-ring, a seal between the frame and base, plus insert
molded terminals, prevents contact contamination and allows
automated soldering and cleaning.
Pushbuttons
Double flatted bushing prevents rotation in panel and increases
stability.
Rockers
Distinctive
Characteristics
Series MRB
Toggles
Miniature PCB Process Sealed Rotaries
TYPICAL SWITCH ORDERING EXAMPLE
Pushbuttons
Rockers
MRB
Poles
1
2
SPDT
SP3T
DPDT
DP3T
1
B
H
2
Terminals
Straight with Bracket
Right Angle with Bracket
B
Knobs
A
B
C
Plain Black
A
Colors
For Plain Knob
No
Code
A
B
C
E
F
G
H
Black
Small Color Tipped
Large Color Tipped
Programmable Illuminated PB
For Color Tipped
Black
White
Red
Yellow
Green
Blue
Gray
Circuits & Indexing
2
4
ON
ON
NONE
ON
ON
ON
90°
45°
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
MRB12B-A
Plain Black Knob
Keylocks
Rotaries
SPDT with
ON-NONE-ON Circuit
& 90° Indexing
G
POLES & CIRCUITS
Actuator Positions
Pole
Model
MRB12
SP
Position 1
ON
Position 2
NONE
Position 3
ON
Connected Terminals
Position 1
C1-1
Position 2
OPEN
Straight PC Terminals
with Bracket
Slides
Throw & Schematics
Note: Terminal numbers
are not actually on switch
C1
Position 3
C1-2
Tactiles
SPDT
1
C1
2
Tilt
MRB14
ON
ON
ON
C1-1
C1-2
C1-3
SP3T
1 2 3
C1
C2
MRB22
Touch
ON
NONE
ON
C1-1 C2-4
OPEN
C1-2 C2-5
DPDT
1
2
C1
4
5
C2
DP
MRB24
ON
ON
ON
C1-1 C2-4 C1-2 C2-5 C1-3 C2-6
DP3T
1 2 3
4 5 6
Indicators
TERMINALS
B
Straight PC Terminals
with Bracket
Accessories
H
Right Angle PC Terminals
with Bracket
Supplement
SPDT
DPDT
G30
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Miniature PCB Process Sealed Rotaries
TYPICAL SWITCH DIMENSIONS
Series MRB
90° Indexing • SPDT & DPDT • Straight PC
Toggles
(2.54) Typ
.100
4
1
5
2
C2
C1
90°
POS 1
POS 3
M6 P0.75
(0.5) Typ
.020
(2.54)
.100
(0.7) Dia Typ
.028
1
2
4
5
(2.28)
.090
(3.1) Dia
.122
Keyway
(14.5)
.571
(10.0)
.394
(7.0)
.276
(11.0)
.433
(5.08)
.200
C1
C2
(5.08)
.200
(1.0) Dia Typ
.039
(10.16)
.400
Actuator shown in Position 1
Single pole model does not have terminals 4, 5 & C2
MRB12B
90° Indexing • SPDT • Right Angle PC
(2.28)
.090
POS 1
Double Flat with
M6 P0.75
(15.74)
.620
(2.54)
.100
C1
2
1
90°
Keyway
POS 3
(3.1) Dia
.122
(0.5) Typ
.020
(10.0)
.394
(7.0)
.276
(0.7) Typ
.028
(9.4)
.370
1
2
C1
(9.0)
.354
(16.3)
.642
(5.08)
.200
(15.24)
.600
(7.62)
.300
(2.54)
.100
C
L
(1.0) Dia Typ
.039
G
MRB12H
Actuator shown in Position 1
90° Indexing • DPDT • Right Angle PC
(2.28)
.090
POS 1
Double Flat with
M6 P0.75
(15.74)
.620
4
5
C2
90°
Keyway
POS 3
(3.1) Dia
.122
(0.5) Typ
.020
(10.0)
.394
(7.0)
.276
(0.7) Typ
.028
(9.4)
.370
1
2
C1
(9.0)
.354
(16.3)
.642
(5.08)
.200
C2
C1
5
2
4
1
(2.54)
.100
(7.62)
.300
(15.24)
.600
(7.62)
.300
(2.54)
.100
(2.54)
.100
(2.54) Typ
.100
(2.54)
.100
(3.5)
(0.7) Dia Typ .138
.028
(5.08)
.200
C
L
(1.0) Dia Typ
.039
45° Indexing • SP3T & DP3T • Straight PC
POS 2
POS 1
45°
45°
POS 3
M6 P0.75
(0.5) Typ
.020
(2.54) Typ
.100
1
2
(0.7) Dia Typ
.028
4
5
6
C2
4
5
1
2
3
C1
(2.54) Typ
.100
(2.28)
.090
(3.1) Dia
.122
Keyway
(14.5)
.571
(10.0)
.394
(7.0)
.276
(11.0)
.433
C1
C2
Actuator shown in Position 1
Single pole model does not have terminals 4, 5, 6 & C2
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MRB14B
G31
Supplement
(2.54) Typ
.100
(3.5)
.138
(10.16)
.400
(0.7) Typ
.028
(10.16)
.400
(1.0) Dia Typ
.039
Accessories
(5.08)
.200
3
(15.74)
.620
6
(5.08)
.200
Indicators
Touch
Actuator shown in Position 1
MRB22H
Tilt
Tactiles
(2.54)
.100
(2.54) Typ
.100
Slides
Rotaries
(2.54) Typ
.100
(2.54)
.100
(3.5)
(0.7) Dia Typ .138
.028
(5.08)
.200
(7.62)
.300
Keylocks
(2.54) Typ
.100
(2.54)
.100
Programmable Illuminated PB
(2.54) Typ
.100
(3.5)
.138
(0.7) Typ
.028
(10.16)
.400
Pushbuttons
(15.74)
.620
Rockers
Series MRB
Toggles
Miniature PCB Process Sealed Rotaries
TYPICAL SWITCH DIMENSIONS
45° Indexing • SP3T • Right Angle PC
Rockers
(2.28)
.090
POS 1
45°
POS 2
(16.3)
.642
Double Flat with
M6 P0.75
(15.74)
.620
(2.54) Typ
.100
(5.08)
.200
C1
(2.54) Typ
.100
(2.54)
.100
(7.62)
.300
C
L
(1.0) Dia Typ
.039
3
2
1
Pushbuttons
45°
Keyway
POS 3
(3.1) Dia
.122
(0.5) Typ
.020
(7.0)
.276
(0.7) Typ
.028
(9.4)
.370
1
2
3
C1
(9.0)
.354
Programmable Illuminated PB
(15.24)
.600
(10.0)
.394
(7.62)
.300
(2.54)
.100
(2.54) Typ
.100
(2.54) Typ
.100
(3.5)
(0.7) Dia Typ .138
.028
(5.08)
.200
MRB14H
Actuator shown in Position 1
45° Indexing • DP3T • Right Angle PC
(2.28)
.090
POS 1
45°
POS 2
45°
Keyway
POS 3
(3.1) Dia
.122
(0.5) Typ
.020
(7.0)
.276
(0.7) Typ
.028
(9.4)
.370
1
2
3
C1
Double Flat with
M6 P0.75
(15.74)
.620
4
5
6
C2
Keylocks
(9.0)
.354
(16.3)
.642
(2.54) Typ
.100
(5.08)
.200
C2
C1
(2.54) Typ
.100
6
3
5
2
4
1
(2.54)
.100
(7.62)
.300
(15.24)
.600
(10.0)
.394
(7.62)
.300
(2.54) (2.54) Typ
.100
.100
(2.54) Typ
(2.54)
.100
.100
(3.5)
(0.7) Dia Typ .138
.028
(5.08)
.200
C
L
(1.0) Dia Typ
.039
Rotaries
G
MRB24H
Actuator shown in Position 1
KNOBS
A
AT433
Plain Black
B
(19.0) Dia
.748
(11.0) Dia
.433
AT4103 Small
Color Tipped
Tactiles
Material:
Polyacetal
Color:
Black
(13.0)
.512
Polyester Base:
Black
(9.5)
.374
(16.0) Dia
.630
(9.5) Dia
.374
C
AT4104 Large
Color Tipped
Slides
(18.0) Dia
.709
(11.0) Dia
.433
(0.5)
.020
Polyamide Tip
Colors:
A, B, C, E, F, G, H
(14.3)
.563
Polyester Base:
Black
(9.5)
.374
(15.8)
.622
(0.5)
.020
Polyamide Tip
Colors:
A, B, C, E, F, G, H
(9.5)
.374
(0.5)
.020
Tilt
Color Codes:
Touch
A
Black
B
White
C
Red
E
Yellow
F
Green
G
Blue
H
Gray
Shaft Detail
(2.28)
.090
Mounting Precaution
for Cap Clearance on
Right Angle Models
When mounting a right
angle switch, a cap clear-
rance of .035” (0.9mm)
is recommended.
Indicators
(10.0)
.394
(3.1) Dia
.122
(1.0)
.039
Interruption
by end of PCB
(0.9)
.035
PCB
Standard Hardware Supplied
AT513M Hex Nut
AT545 Locking Ring
AT509 Lockwasher
Optional Hardware
AT535 O-ring for Panel Seal
See Supplement for details
Accessories
PANEL CUTOUTS & MAXIMUM EFFECTIVE PANEL THICKNESS
With Standard
Hardware
.087” (2.2mm)
(6.5)
.256
Supplement
(6.35) Dia
.250
(2.2) Dia
.087
Without
Locking Ring
.118” (3.0mm)
(6.35) Dia
.250
(5.6)
.220
(0.6)
.024
Sealed Panel
with 1 Hex Nut &
1 Rubber O-ring
.165” (4.2mm)
(6.2) Dia
.244
(5.4)
.213
G32
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