series mr half-inch diameter process sealed rotaries www.nkk.com g16 indicators accessories supplement tactiles keylocks pushbuttons illuminated pb slides programmable rockers touch tilt toggles g rotaries 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 C self-cleaning, sliding contact; mrf & mrk C 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; fberglass reinforced polyamide for mrf & mrk environmental data operating temperature range: C10c through +70c (+14f through +158f) humidity: 90 ~ 95% humidity for 96 hours @ 40c (104f) 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/s 2 ) acceleration (tested in 3 right angled directions, with 3 shocks in each direction) sealing: mrk model meets ip67 of iec60529 standards installation mounting torque: .686nm (6.08 lb ? in) cap installation force: 19.6 ~ 29.4n (4.41 ~ 6.61 lbf) for mra & mrk processing soldering time & temperature: wave soldering for mra: see profle a in supplement section. wave soldering for mrf & mrk: see profle b in supplement section. manual soldering for mra: see profle a in supplement section. manual soldering for mrf & mrk: see profle 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 specifcations in supplement section. standards & certifications mra, mrf, & mrk models have not been tested for ul recognition or csa certifcation. 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. general specifcations
series mr half-inch diameter process sealed rotaries www.nkk.com g17 indicators accessories supplement tactiles keylocks pushbuttons illuminated pb slides programmable rockers touch tilt toggles g rotaries actual size low profle body of mrf model accommodates space limitations required for pcb mounting. for the mra and mrk bushing mount models, the range of behind panel body depths is .323 to .669 (8.2mm to 17.0mm). positive detent mechanism for distinct feel and audible feedback. metal bushing and housing construction increases durability. adjustable stopper plate allows 2C12 position settings. high contact reliability achieved by the self-cleaning contact mechanism. break-before-make contact timing with sliding contacts in mra and rotary contactor disk in mrf and mrk models. interior housing seal and molded-in pc terminals, plus shaft rubber o-ring on mra and mrk and polyamide cover on mrf model, allow cleaning after automated soldering. mrk model meets ip67 of iec60529 specifcations (similar to nema 4 & 13). distinctive characteristics
series mr half-inch diameter process sealed rotaries www.nkk.com g18 indicators accessories supplement tactiles keylocks pushbuttons illuminated pb slides programmable rockers touch tilt toggles g rotaries typical switch ordering example knobs a plain black b small color tipped c large color tipped 206 description for typical ordering example mra206-a colors for plain knob no code black for color tipped a black b white c red e yellow f green g blue h gray a a shaft actuated with pc terminals actuators & terminals shaft terminal mr shaft actuated with plain black knob dp with 2-6 adjustable positions pc terminals f a actuators & terminals a shaft actuated with pc terminals f low profle screwdriver actuated with pc terminals k low profle shaft actuated with pc terminals poles & circuits 112 sp with 2-12 positions 206 dp with 2-6 positions 403 4p with 2-3 positions low profle screwdriver actuated with pc terminals k low profle shaft actuated with pc terminals slotted for terminal screwdriver shaft terminal (3.15) dia .124 (10.0) .394 (2.3) .091 (3.15) dia .124 (0.8) .031 (1.0) .039 (3.15) dia .124 (10.0) .394 (2.3) .091 12 11 10 9 1 12 11 10 2 (0.5) .020 thk = (0.25) .010 (3.5) .138 (0.5) .020 thk = (0.25) .010 (3.5) .138 (0.5) .020 thk = (0.25) .010 (3.5) .138 2 1 c 12 11 10 m r - 1 2 3 4 5 6 7 8 9 10 11 12 m r - k 1 1 2 2 1 c 12 11 10 9 12 11 10 9
series mr half-inch diameter process sealed rotaries www.nkk.com g19 indicators accessories supplement tactiles keylocks pushbuttons illuminated pb slides programmable rockers touch tilt toggles g rotaries pole model number of positions stopper settings number of terminals schematics sp mra112 mrf112 mrk112 2C12 2C12 2C12 2, 3, 4, . . . 12 2, 3, 4, . . . 12 2, 3, 4, . . . 12 1 com, 12 load 1 com, 12 load 1 com, 12 load dp mra206 MRF206 mrk206 2C6 2C6 2C6 2, 3, 4, 5, 6 2, 3, 4, 5, 6 2, 3, 4, 5, 6 2 com, 12 load 2 com, 12 load 2 com, 12 load 4p mra403 mrf403 mrk403 2C3 2C3 2C3 2, 3 2, 3 2, 3 4 com, 12 load 4 com, 12 load 4 com, 12 load poles & circuits 12 34 56 78 91 01 11 2 a 12 34 56 12 34 56 a b 12 31 23 12 31 23 a b c d position setting for mra, mrf, & mrk 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. mrf models 1. remove the protective cover from the switch body. 2. turn the shaft counterclockwise to the extreme left by using a screwdriver. 3. inside the cover is a magnifying lens which would be positioned over the number which is to be the maximum position used; when the cover is then snapped into the switch, the projection beside the lens fts into the correct hole for setting the stop. 2 1 c 12 11 10 m r - 1 2 3 4 5 6 7 8 9 10 11 12 protective cover lens projection mrk & mra models 1. using the actuator knob, turn the shaft counterclockwise to the extreme left. if the shaft is not turned counterclockwise to the extreme left, proper setting can- not be achieved. at this extreme posi- tion, the white line on the knob points to the number 1 position shown on the side of the switch. 2. remove the knob from the shaft and loosen the nut far enough to allow rais- ing the stopper plate, plus washer(s), 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 func- tioning cannot be assured if the stopper plate is not properly positioned. 4. tighten the nut (beveled side up) frmly against the stopper plate. 12 11 10 9 1 12 11 10 2 m r - k 1 1 2 2 1 c 12 11 10 9 12 11 10 9 standard mounting hardware packaged loose with each switch: hex face nut locking ring lockwasher rubber ring (mrk) factory assembled: hex nut stopper plate metal washer (mra) rubber washer
series mr half-inch diameter process sealed rotaries www.nkk.com g20 indicators accessories supplement tactiles keylocks pushbuttons illuminated pb slides programmable rockers touch tilt toggles g rotaries typical switch dimensions single pole mra112 . 3 " t 1 $ 5 f s n j o b m t 1 p m f 1 p m f 1 p m f . 3 ' t 1 $ 5 f s n j o b m t 1 p m f 1 p m f 1 p m f mra112 mrk112 mrk devices are designed to be panel mounted. installation without panel mounting will affect reliability. . 3 , t 1 $ 5 f s n j o b m t 1 p m f 1 p m f 1 p m f mrf403 footprints double pole mra206 four pole mra403 single pole mrf112 mrk112 double pole MRF206 mrk206 four pole mrf403 mrk403 keyway (3.15) dia .124 (16.0) dia .630 (10.0) .394 (10.0) .394 (17.0) .669 m6 p0.75 (5.0) .197 (1.0) .039 (2.3) .091 (6.0) .236 (0.8) dia ty p .031 a 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 3 0 t y p (9.5) dia .374 (3.0) dia .118 aa 1 2 3 4 5 6 1 2 3 4 5 6 3 0 t y p (9.5) dia .374 (3.0) dia .118 b aa 1 2 3 1 2 3 1 2 3 1 2 3 3 0 t y p (9.5) dia .374 (3.0) dia .118 b d c (4.2) .165 (8.2) .323 (3.5) .138 (0.5) ty p .020 (12.0) dia .472 (0.25) ty p .010 cover b 3 2 1 c 3 2 1 a 3 2 1 d 3 2 1 (12.6) dia .496 1 5 t y p 1 5 3 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 (14.0) dia .551 (0.8) .031 b 6 5 4 3 2 1 a 6 5 4 3 2 1 (12.6) dia .496 1 5 t y p 1 5 3 0 (12.6) dia .496 7 6 5 4 3 2 1 a 1 2 1 1 1 0 9 8 1 5 t y p 1 5 3 0 (12.6) dia .496 7 6 5 4 3 2 1 a 1 2 1 1 1 0 9 8 1 5 t y p 1 5 3 0 (12.6) dia .496 6 5 4 3 2 1 a 6 5 4 3 2 1 b 1 5 3 0 1 5 t y p 1 5 t y p (12.6) dia .496 3 2 1 c 3 2 1 a 3 2 1 d 3 2 1 b 1 5 t y p (9.5) dia .374 (3.0) ty p .118 (1.0) dia ty p .039 a 1 2 3 1 2 3 1 2 3 1 2 3 b d c 9 0 3 0 t y p (9.5) dia .374 (3.0) ty p .118 (1.0) dia ty p .039 a 1 2 3 4 5 6 1 2 3 4 5 6 b 3 0 t y p 1 8 0 (9.5) dia .374 (3.0) typ .118 (1.0) dia typ .039 a 1 2 3 4 5 6 7 8 9 10 11 12 3 0 t y p a 1 2 3 c 1 2 3 b 1 2 3 d 1 2 3 (12.0) dia .472 (0.8) dia ty p .031 1 5 t y p 1 5 t y p (0.8) dia ty p .031 (12.0) dia .472 a 1 2 3 4 5 6 b 2 3 4 5 6 1 1 5 t y p 3 0 t y p (0.8) dia typ .031 (12.0) dia .472 a 1 2 3 4 5 6 7 8 9 10 11 12 3 0 t y p 1 5 t y p (10.0) .394 (10.1) .398 m6 p0.75 (2.28) .090 (5.5) .217 (3.5) .138 (0.5) ty p .020 (12.0) dia .472 (0.25) ty p .010 keyway (3.1) dia .122
series mr half-inch diameter process sealed rotaries www.nkk.com g21 indicators accessories supplement tactiles keylocks pushbuttons illuminated pb slides programmable rockers touch tilt toggles g rotaries knobs a at433 plain black color codes: black white red yellow green blue a b c e f g gray h (11.0) dia .433 (19.0) dia .748 (9.5) .374 (13.0) .512 (0.5) .020 (16.0) dia .630 (9.5) dia .374 (14.3) .563 (9.5) .374 (0.5) .020 (11.0) dia .433 (18.0) dia .709 (9.5) .374 (15.8) .622 (0.5) .020 base material: polyester base color: black polyamide tip colors: a, b, c, e, f, g, h material: polyacetal color: black only base material: polyester base color: black polyamide tip colors: a, b, c, e, f, g, h b at4103 small color tipped c at4104 large color tipped panel cutouts & maximum effective panel thickness without keyway standard mounting hardware at513m metric hexagon nut material: brass, nickel plating 1 for mra; 1 for mrk at545 locking ring material: steel, chromate over zinc plating 1 for mra; 1 for mrk at509 lockwasher material: steel, chromate over zinc plating 1 for mra; 1 for mrk at535 rubber ring material: nitrile butadiene rubber 1 for mrk (9.0) .354 (1.5) .059 (0.5) .020 (6.4) dia .252 (10.2) dia .402 nonsealed panel sealed panel with standard hardware on nonsealed panel: mra .067 (1.7mm) mrk .087 (2.2mm) without locking ring on nonsealed panel: mra .098 (2.5mm) mrk .118 (3.0mm) with at513m & at535 only on sealed panel: mrk .106 (2.7mm) with keyway (6.35) dia .250 (5.6) .220 (0.6) .024 (6.2) dia .244 (5.4) .213 (6.35) dia .250 (6.5) .256 (2.2) dia .087 optional support bracket at543 support bracket for mrk material: steel with tin plating a support bracket is needed when the mrk is mounted only to a pc board and does not have the bushing through a panel. (18.0) .709 (18.0) .709 (14.9) .587 (0.8) ty p .031 (3.8) ty p .150 (0.5) ty p .020 (14.0) .551 (8.0) .315 m6 p0.75 (1.3) .051 (6.2) dia .244 (9.4) dia .370 (17.5) .689 (17.2) .677 (1.2) dia ty p .047 mra & mrk mrk (1.7) .067 (0.8) .031 (2.0) .079 (5.5) .217 (6.0) .236 (11.6) .457 (12.0) .472
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