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Mica

Mica insulators provide high maximum operating temperatures (550°C) and excellent electrical properties.


Part No. RoHS PCN Figure Case Style A B C D E F Thickness
56-02-95 N/A 1 TO-218 23.24 (.915) 18.80 (.740) 16.26 (.640) 6.98 (.275) N/A 5.59 (.220) .05/.10 (.002/.004)
56-77-10 N/A 3 TO-220 21.89 (.862) 13.21 (.520) 14.73 (.580) 5.26 (.270) 5.08 (.200) 1.75 (.070) .05/.10 (.002/.004)
56-77-8G 2 TO-220 18.93 (.745) 13.84 (.545) 13.54 (.533) 5.38 (.212) N/A 3.81 (.150) .05/.10 (.002/.004)
56-77-11G 2 TO-220 18.93 (.745) 13.84 (.545) 13.54 (.533) 5.38 (.212) N/A 3.05 (.120) .05/.10 (.002/.004)
56-03-2G 4 TO-3 42.04 (1.655) 27.00 (1.063) 3.96 (.156) 1.57 (.062) N/A N/A .05/.10 (.002/.004)
56-03-8G 4 TO-3 42.85 (1.687) 30.15 (1.187) 3.96 (.156) 1.57 (.062) N/A N/A .05/.10 (.002/.004)
* This insulator is also for TO-18, TO-247, and TO3P.
Note: Tolerances are ±.38mm (.015") unless otherwise specified.
 
Note: Tolerances are ±.38mm (.015") unless otherwise specified.



PropertyTypical Value 25°C
Electrical
Dielectric Strength
.025mm to .076mm thick in air
(1 to 3 mils thick in air)		 172 x 103 volts/mm (4500 volts/mil)
Dielectric Constant 6.5 to 8.7
Dissipation Factor 106 Cycles .0001 -.004
Volume Resistivity 1015 ohm-cm
Physical
Modulus of Elasticity in Tension 172 x 103 (25 x 106 psi)
Tensile Strength 310 MPa (45,000 psi)
Hardness Mohs
Shore		 3.0
115
Comprehensive Strength 2.21 x 108 Pa (32,000 psi)
Specific Gravity 2.9
Thermal
Thermal Conductivity: 0.528 Wm-1°C-1
(.30 Btu/hr.ft °F)
Coefficient of Thermal Expansion 3.24 x 10-5/°C
(1.8x 10-5/°F)
Specific Heat .084 KJ/Kg°C
(.02 Btu/Lb °F]
Melting Point 1275°C
Maximum Operating Temperature (1022°C) 550°C
Chemical Composition
Silica 45.4%
Alumina 37.5%
Potash 12.0%
Water 5.0%



Part Number ID OD Diameter Tolerances Thickness
56-02-10 5.16 (.203) 14.30 (.563) ±13 (.005) .05/.10 (.002/.004)
56-02-72 6.55 (.258) 25.40 (1.00) ±38 (.015) .10/.15 (.004/.006)








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