Miniature PCB Process Sealed Rotaries
Series MRB
Distinctive Characteristics
Double flatted bushing prevents rotation in panel and increases
stability.
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.
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
Insert molded terminals lock out flux and other contaminants.
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Miniature PCB Process Sealed Rotaries
Series MRB
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.
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
Materials & Finishes
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
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 5 shocks in each direction)
Installation
Mounting Torque:
Cap Installation Force:
.686Nm (6.08 lb
•
in)
19.6 ~ 29.4N (4.41 ~ 6.61 lbf)
PCB Processing
Soldering:
Cleaning:
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.
Standards & Certifications
UL Recognition
or CSA Certification:
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.
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Miniature PCB Process Sealed Rotaries
TYPICAL SWITCH ORDERING EXAMPLE
Series MRB
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
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
SPDT with
ON-NONE-ON Circuit
& 90° Indexing
Straight PC Terminals
with Bracket
POLES & CIRCUITS
Actuator Positions
Pole
Model
MRB12
SP
MRB14
ON
ON
ON
C1-1
C1-2
C1-3
SP3T
1 2 3
Connected Terminals
Position 1
C1-1
Position 2
OPEN
Position 3
C1-2
Throw & Schematics
Note: Terminal numbers
are not actually on switch
C1
Position 1
ON
Position 2
NONE
Position 3
ON
SPDT
1
2
C1
C1
C2
MRB22
DP
MRB24
ON
NONE
ON
C1-1 C2-4
OPEN
C1-2 C2-5
DPDT
1
2
C1
4
5
C2
ON
ON
ON
C1-1 C2-4 C1-2 C2-5 C1-3 C2-6
DP3T
1 2 3
4 5 6
TERMINALS
B
Straight PC Terminals
with Bracket
H
Right Angle PC Terminals
with Bracket
SPDT
DPDT
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Miniature PCB Process Sealed Rotaries
TYPICAL SWITCH DIMENSIONS
90° Indexing • SPDT & DPDT • Straight PC
90°
POS 1
POS 3
M6 P0.75
(0.5) Typ
.020
(2.54)
.100
Series MRB
(0.7) Dia Typ
.028
1
2
4
5
4
1
2
(2.54) Typ
.100
5
(2.28)
.090
(3.1) Dia
.122
Keyway
(14.5)
.571
(10.0)
.394
(7.0)
.276
(11.0)
.433
(5.08)
.200
(15.74)
.620
C1
C2
C2
C1
(5.08)
.200
(1.0) Dia Typ
.039
(2.54) Typ
.100
(3.5)
.138
(0.7) Typ
.028
(10.16)
.400
(10.16)
.400
MRB12B
Actuator shown in Position 1
Single pole model does not have terminals 4, 5 & C2
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
(2.54) Typ
.100
(2.54)
.100
(7.62)
.300
(15.24)
.600
(7.62)
.300
(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
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
(2.54)
.100
C2
C1
5
2
4
1
(2.54) Typ
.100
(2.54)
.100
(7.62)
.300
C
L
(1.0) Dia Typ
.039
(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
MRB22H
Actuator shown in Position 1
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
(5.08)
.200
3
C1
(15.74)
.620
6
C2
(5.08)
.200
(1.0) Dia Typ
.039
(2.54) Typ
.100
(3.5)
.138
(10.16)
.400
(0.7) Typ
.028
(10.16)
.400
MRB14B
Actuator shown in Position 1
Single pole model does not have terminals 4, 5, 6 & C2
03-07
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
Miniature PCB Process Sealed Rotaries
TYPICAL SWITCH DIMENSIONS
45° Indexing • SP3T • 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
Series MRB
Double Flat with
M6 P0.75
(15.74)
.620
(9.0)
.354
(16.3)
.642
(2.54) Typ
.100
(5.08)
.200
C1
3
2
1
(2.54) Typ
.100
(2.54)
.100
(7.62)
.300
(15.24)
.600
(10.0)
.394
(7.62)
.300
(2.54) Typ
.100
(2.54)
(2.54) Typ
.100
.100
(3.5)
(0.7) Dia Typ .138
.028
(5.08)
.200
C
L
(1.0) Dia Typ
.039
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
(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
MRB24H
Actuator shown in Position 1
KNOBS
A
AT433
Plain Black
B
(19.0) Dia
.748
(11.0) Dia
.433
AT4103 Small
Color Tipped
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
(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
Color Codes:
Shaft Detail
(2.28)
.090
(10.0)
.394
(3.1) Dia
.122
(1.0)
.039
A
Black
B
White
C
Red
E
Yellow
F
Green
G
Blue
H
Gray
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.
Interruption
by end of PCB
(0.9)
.035
PCB
Standard Hardware Supplied
AT513M Hex Nut
AT507M Locking Ring
AT509 Lockwasher
Optional Hardware
AT535 O-ring for Panel Seal
See Supplement for details
PANEL CUTOUTS & MAXIMUM EFFECTIVE PANEL THICKNESS
With Standard
Hardware
.087” (2.2mm)
(6.5)
.256
(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 2 Hex Nuts &
1 Rubber O-ring
.165” (4.2mm)
(6.2) Dia
.244
(5.4)
.213
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
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