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MRK112-BB Datasheet(PDF) 2 Page - Nihon Kaiheiki Industry Co. Ltd.

Part # MRK112-BB
Description  Half-Inch Diameter Process Sealed Rotaries
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Manufacturer  NKK [Nihon Kaiheiki Industry Co. Ltd.]
Direct Link  http://www.nkkswitches.com
Logo NKK - Nihon Kaiheiki Industry Co. Ltd.

MRK112-BB Datasheet(HTML) 2 Page - Nihon Kaiheiki Industry Co. Ltd.

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NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
05-08
Half-Inch Diameter Process Sealed Rotaries
Series MR
General Specifications
Electrical Capacity (Resistive Load)
For MRA:
250mA @ 125V AC
For MRF or MRK:
0.4VA maximum @ 28V AC/DC maximum
(Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V)
Note: Find additional explanation of operating range in Supplement section.
Other Ratings
Contact Resistance:
10 milliohms maximum for MRA; 50 milliohms maximum for MRF & MRK
Insulation Resistance:
100 megohms minimum @ 500V DC
Dielectric Strength:
1,000V AC minimum for 1 minute minimum for MRA
500V AC minimum for 1 minute minimum for MRF & MRK
Mechanical Life:
30,000 operations minimum
Electrical Life:
10,000 operations minimum
Range of Operating Torque:
0.02 ~ 0.07Nm for MRA; 0.005 ~ 0.02Nm for MRF & MRK
Contact Timing:
Nonshorting (break-before-make)
MRA – self-cleaning, sliding contact; MRF & MRK – self-cleaning, rotary contactor disk
Indexing:
30°
Materials & Finishes
Shaft:
Brass with nickel plating
Stopper Plate:
Steel with zinc plating for MRA & MRK; polyamide cover with stopper for MRF
Bushing/Housing:
Zinc alloy with zinc plating
Movable Contacts:
Copper with silver plating for MRA; phosphor bronze with gold plating for MRF & MRK
End Contacts & Terminals:
Brass with silver plating for MRA; phosphor bronze with gold plating for MRF & MRK
Common Contacts & Terminals:
Brass with silver plating for MRA; phosphor bronze with gold plating for MRF & MRK
Base:
Diallyl phthalate for MRA; fiberglass reinforced polyamide for MRF & MRK
Environmental Data
Operating Temperature Range:
–10°C through +70°C (+14°F through +158°F)
Humidity:
90 ~ 95% humidity for 96 hours @ 40°C (104°F)
Vibration:
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
Shock:
50G (490m/s2) acceleration (tested in 3 right angled directions, with 3 shocks in each direction)
Installation
Mounting Torque:
.686Nm (6.08 lbin)
Cap Installation Force:
19.6 ~ 29.4N (4.41 ~ 6.61 lbf) for MRA & MRK
Processing
Soldering Time & Temperature:
Wave Soldering for MRA: See Profile A in Supplement section.
Wave Soldering for MRF & MRK: See Profile B in Supplement section.
Manual Soldering for MRA: See Profile A in Supplement section.
Manual Soldering for MRF & MRK: See Profile B in Supplement section.
Cleaning:
Automated cleaning recommended. Stopper plate, as well as washers for MRA & MRK, must be in
place to maintain automated cleaning. See Cleaning specifications in Supplement section.
Standards & Certifications
UL Recognition
MRA, MRF, & MRK models have not been tested for UL recognition or CSA certification.
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.


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