Insulating Hardware

Insulating hardware includes a diverse range of harder, thermally conductive materials with higher insulating capabilities.

Aluminum Oxide Ceramic
These washers feature a high delectric strength and unique thermal conductivity attributes.
Insulating Covers
Designed to provide increased protection from shock during field service and repair.
Bushings
Insulated devices for mounting and to allow electrical conductors to pass through product design safely.
Mica
Ideal for use in applications with extremely high operating temperatures.
Hard Anodized Aluminum
Unique hard coating process with high dielectric capabilities and high thermal conductivity.
Beryllium Oxide Ceramic
Unique design prevents circuit de-tuning and loss of signal power.



Aluminum Oxide Ceramic

Aluminum oxide insulating washers have a dielectric strength of approximately 21.7 x 103 volts/mm for 0.76mm material (550 volts/mil for 0.030 inch material) and 16.9 x 103 volts/mm for 1.57mm material (430 volts/mil for 0.062 inch material). The thermal conductivity of aluminum oxide is 15.06 W/mK @ 75° (8.71 BTU/hr-ft°F @ 167°F).

Aluminum oxide has unique thermal conductivity qualities and features low loss factors at high frequencies. It has high compressive strengths, high volume resistivity, low thermal expansion and it resists radiation.

Note: Hole diameters are +/- 0.13mm (0.005"), angularity is +/- 1° and flatness is 0.05mm (0.002") TIR unless otherwise specified.



For TO-3


Part Number RoHS PCN A B C D E
4103G* 39.70
(1.563)
26.67
(1.050)
13.34
(0.525)
4.75
(0.187)
30.40
(1.197)
*Thickness:
4103: 1.78 (0.070) to 2.03 (0.080)

For TO-220


Part # RoHS PCN A B C D E Thickness
4169G* 19.30
(0.760)
13.97
(0.550)
4.78
(0.188)
6.98
(0.275)
3.68
(0.145)
1.57mm +/- 0.08
(0.062” +/- 0.003”)
4170G** 19.30
(0.760)
13.97
(0.550)
4.78
(0.188)
6.98
(0.275)
3.68
(0.145)
1.57mm +0.51/-0.08
(0.062” + 0.020/-0.003)
4171G** 16.51
(0.650)
12.70
(0.500)
4.32
(0.170)
6.35
(0.250)
3.81
(0.150)
1.778mm +/- 0.254
(0.070” +/- 0.010”)
4177G** 17.45
(0.687)
14.27
(0.562)
5.54
(0.218)
7.14
(0.281)
3.18
(0.125)
1.778mm +/- 0.254
(0.070” +/- 0.010”)
* Surface flatness is 0.10mm (0.004") TIR
** Surface flatness is 0.05mm (0.002 TIR)


For TO-218, TO-247, and TO-3P

Part Number RoHS PCN A B C D E
4180* 23.24
(0.915)
18.80
(0.740)
6.98
(0.275)
9.40
(0.370)
3.96
(0.156)
*Thickness:2.03mm +/- .25 (0.080" +/- .010")



Insulating Covers

Hard plastic covers designed to fit over TO-3 devices that protect from electrical shock during field service and repair. Aavid covers are available in screw-on and snap-on attachment methods for easy use and installation.


8903 Screw Mounted Cover
Pan head screws not provided - MS 51957-30 or equivalent recommended - secure the cover to the TO-3. At the typical mounting screw torque of .68 - .90 Nm (6-8 inch pounds), the TO-3 cover material cold-flows around the screw head to securely fasten the cover.

Included are No.6 split washers as inserts to provide electrical connection of mounting screws to the TO-3 collector and an insulating snap-in cover for the screw heads. A test probe hole is provided in the top of the cover.

The 8903VB is made from thermoplastic polyester that meets the requirements of UL Bulletin 94 V-O. In addition to its excellent flammability rating, thermoplastic polyester offers resistance to most chemical environments, heat deflection temperature to 215.6°C (420°F) and UL continuous use temperature of 130 °C (266 °F).




Part Number RoHS PCN Material Color Flammability
Standards
8903NWG Nylon White Self-extinguishing UL 94 V-2
8903VBG Thermoplastic
Polyester
Black Self-extinguishing UL 94 V-0
UL 492 Type 1

8909 Snap on Cover
Aavid 8909 Snap on Cover is designed to prevent accidental electrical shock, the 8909 fits TO-3 case styles. A test probe hole in top eliminates the need to remove cover for testing. Recommended for low vibration applications. A precise friction fit is required for proper assembly. Please read the engineering information release for more details on the fit problems that can arise.

The 8903 cover shown above is recommended for most applications due to the typical size variation of the TO-3 package.




Part Number RoHS PCN Material Color Flammability
Standards
8909NBG Nylon Black UL 94 V-2





Bushings - Insulating Hardware

PTFE-Filled Acetal Insulators
Electrically insulating liners designed to enable electrical connectors to pass through grounded barriers. Aavid bushings are made of a variety of thermoplastic polymers and designed for easy use and optimized electrical insulation.



Part Number RoHS PCN FITS Notch A Dim
103G 4.83
(0.190)
4.90
(0.193)
109G 6.35
(0.250)
6.35
(0.250)

Part Number: 110500F00000


Part Number: 110700F00000



PTFE-Filled Acetal Bushings



Part Number RoHS PCN I.D. O.D. T
110G 5.08 / 5.21
(0.198 / 0.205)
6.86 / 6.98
(0.268 / 0.275)
1.57 / 1.40
(0.062 / 0.055)
113G 6.48 / 6.60
(0.253 / 0.260)
7.87 / 8.00
(0.308 / 0.315)
1.57 / 1.40
(0.062 / 0.055)

Nylon Bushings - Material is Nylon type 6



Part Number A B C
114* 4.50 / 4.63
(0.177 / 0.182)
3.56 / 3.81
(0.140 / 0.150)
1.40 / 1.66
(0.055 / 0.065)
116** 9.19 / 9.45
(0.362 / 0.372)
6.71 / 6.96
(0.264 / 0.274)
1.45 / 1.70
(0.057 / 0.067)
*Formerly Motorola Part Number B51547F002
**Formerly Motorola Part Number B51547F013
Need assistance?
Call us: 1-855-32-AAVID
Email: estore@aavid.com

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