Open Frame series  
Type MF

2.312 inch diameter with 24 detent positions and 1 to 4 sections. Double-wiping, self-cleaning, silver-plated brass contacts, phenolic insulation. Unique protective coating guards against tarnish and corrosion, extends shelf life.

Specifications
Size   1.75" width x 2.312" height
Mounting Clearance holes for a .375" -32 bushing and a .125" x .037" locating key on a .531" radius on the adjustable stopwasher
Shaft .250" diameter (+.000 -.003); 2.375" long; grooved at .75", 1.125", and 1.875" from switch mounting surface
Indexing Tri-ball type, 15°
Terminal Strength 5 lb. pull
Rotor Insulation Phenolic PBE-P per LP-513
Stator Insulation Phenolic PBE-P per LP-513
Section Thickness .062"
Contacts Silver-plated brass. Protective coating extends shelf life
Contact Resistance .003 to .015 ohms between adjacent clips
Electrical Rating Break 1 amp at 28 volts DC, .5 amp at 110 volts AC, resistive. Carry 5 amps
Type MF dimensions

Type MF Switch Components

Basic Type MF components provide the additional flexibility of meeting specific design requirements through distributor assembly of these components into other switch configurations.

Type MF switch components
PC Hole Pattern
 

Type MF Switch Assemblies
With silver-plated brass contacts and solder terminals
Total Poles Active Positions Poles/Section Circuit Configuration Number of Sections Catalog Number
Shorting Non-Shorting
1 2-24 1 Fig. 18 1 399684-MF 399685-MF
2 2-24 1 Fig. 18 2 399686-MF 399687-MF
3 2-24 1 Fig. 18 3 399688-MF 399689-MF
4 2-24 1 Fig. 18 4 399690-MF 399691-MF
Figure 18

Type MF Rotary Section
With silver-plated brass contacts and solder terminals
Total Poles Active Positions Section Type Circuit Configuration Catalog Number
Shorting Non-Shorting
1 2-24 Standard Fig. 18 399145-MF* 399182-MF
2 2-12 Standard Fig. 19 399832-MF* 399833-MF*

*Available made-to-order only.
Figure 19

Shaft and Index Assemblies
Includes mounting nut and lockwasher, stopwasher, strut screws, assorted spacers, washers, and nuts.
Catalog Number Dimension "A"
(see above dimensioned drawing)
399143-MF 2.468" (63 mm)
399144-MF 6.125" (155.5 mm)