MRA112-CC NKK Switches

Series MR Half-Inch Diameter Process Sealed Rotaries 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 G 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: 10C 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 2 Shock: 50G (490m/s ) 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 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 MRA, MRF, & MRK models 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. G16 www.nkkswitches.com Supplement Accessories Indicators Touch Tilt Tactiles Slides Rotaries Keylocks Programmable Illuminated PB Pushbuttons Rockers TogglesHalf-Inch Diameter Process Sealed Rotaries Series MR Distinctive Characteristics Low profile 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 212 position settings. High contact reliability achieved by the self-cleaning contact mechanism. G 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 specifications (similar to NEMA 4 & 13). Actual Size www.nkkswitches.com G17 Supplement Accessories Indicators Touch Tilt Tactiles Slides Rotaries Keylocks Programmable Illuminated PB Pushbuttons Rockers Toggles