Datasheet

Series MR
Half-Inch Diameter Rotary Switches
Electrical Capacity (Resistive Load)
For MRX: 2A @ 125V AC or 1A @ 30V DC
For MRY: 3A @ 125V AC or 2A @ 30V DC
For MRT: 10A @ 125V AC or 4A @ 30V DC for MRT22
5A @ 125V AC or 3A @ 30V DC for MRT23
Other Ratings
Contact Resistance: 10 milliohms maximum
Insulation Resistance: 100 megohms minimum @ 500V DC for MRX & MRY
200 megohms minimum @ 500V DC for MRT
Dielectric Strength: 1,000V AC minimum
Mechanical Life: 15,000 operations minimum
Electrical Life: 7,500 operations minimum
Range of Operating Torque: 500 ~ 1500 grams-cm for MRX; 500 ~ 1000 grams-cm for MRY;
200 ~ 500 grams-cm for MRT
Contact Timing: Nonshorting (break-before-make)
MRX ~ self-cleaning, sliding contact; MRY ~ Rotary contactor dish; MRT ~ Butt contacts
Indexing: 45° for MRX; 60° for MRY; 120° for MRT22; 60° for MRT23
Materials & Finishes
Shaft: Brass with nickel plating
Stopper Plate: Steel with zinc plating for MRX & MRY
Bushing/Housing: Brass with nickel plating
Movable Contacts: Silver alloy for MRX & MRT
Copper with silver plating for MRY
End Contacts & Terminals: Copper with silver plating for MRX & MRT
Silver alloy plus brass with silver plating for MRY
Common Contacts & Terminals: Copper with silver plating for MRX, MRY, & MRT22
Brass with silver plating for MRT23
Base: Phenolic resin
Environmental Data
Operating Temp 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 acceleration (tested in 3 right angled directions, with 3 shocks in each direction)
Installation
Mounting Torque: 2 ~ 3 kgf/cm (1.75 ~ 2.60 lb/in)
Soldering Time & Temperature: 3 seconds @ 350°C or 5 seconds @ 270°C
Standards & Certifications
UL Recognized: MRT22 models recognized at 10A @ 125V AC;
MRT23 models recognized at 5A @ 125V AC; UL File No. E44145
GENERAL SPECIFICATIONS
10-10-00
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