A-A-59588
The silicone rubber shall be of the following classes and grades, as specified:
Class 1A – Low temperature resistant.
Grades – 40, 50, 60, 70, 80
Class 1B – Low temperature resistant and low compression set at high temperature.
Grades – 40, 50, 60, 70, 80
Class 2A – High temperature resistant.
Grades – 25, 40, 50, 60, 70, 80
Class 2B – High temperature resistant and low compression set.
Grades – 25, 40, 50, 60, 70, 80
Class 3A – Low temperature, tear and flex resistant.
Grades – 30, 50, 60
Class 3B – Tear and flex resistant.
Grades – 30, 50, 60, 70, 80
The silicone rubber covered by this specification is intended generally for use under the conditions listed below. Users should, however, consider all the requirements of this specification when selecting a class and grade of silicone rubber.
Class 1 – Where resistance to extreme low temperature is required to approximately -73ºC (-100ºF). Class 1 material also possesses resistance to extreme high temperature (to approximately 219ºC (425ºF)), but length of service at high temperatures is less than that of the class 2 materials. The class 1B material also possesses low compression set at high temperature.
Class 2 – Where resistance to extreme high temperature is required to approximately 219ºC (425ºF). Class 2 material possesses low temperature resistance, but only to about -62ºC (-80ºF). Class 2B material also possesses low compression set.
Class 3A – Where resistance to extreme low temperature to approximately -75ºC (-103ºF), and resistance to tearing and flexing are required. Class 3A material also possesses resistance to extreme high temperature to approximately 204ºC (400ºF).
Class 3B – Where resistance to tearing and flexing are required, but the resistance to extreme low temperature requirement is less than that of the class 3A material. Temperature range for the class 3B material is approximately between -70ºC (-94ºF) and 204ºC (400ºF).
Red Silicone (Spec Grade)
| Duro Shore A ± 5 | Thickness (in.) | Width (in.) | Tensile Strength (psi) | Ultimate Elongation % | Temp Range | Est. Weight Per Linear Ft. (1/8" x 36") | Specifications |
|---|---|---|---|---|---|---|---|
| 40 | 1/32 - 1/4 | 36, 48 | 800 | 450 | -65°F to +450°F | 7.45 | A-A-59588 2A & 2B ZZ-R-765 2A & 2B AMS 3301 ASTM D 2000 1GE 407 |
| 50 | 1/32 - 1/4 | 36, 48 | 800 | 350 | -65°F to +450°F | 7.5 | A-A-59588 2A & 2B ZZ-R-765 2A & 2B AMS 3301 ASTM D 2000 1GE 507 |
| 60 | 1/32 - 1/4 | 36, 48 | 750 | 300 | -65°F to +450°F | 8 | A-A-59588 2A & 2B ZZ-R-765 2A & 2B AMS 3301 ASTM D 2000 1GE 607 |
| 70 | 1/32 - 1/4 | 36, 48 | 750 | 250 | -65°F to +450°F | 8.15 | A-A-59588 2A & 2B ZZ-R-765 2A & 2B AMS 3301 ASTM D 2000 1GE 707 |
White Silicone (Food Grade)
| Duro Shore A ± 5 | Thickness (in) | Width (in.) | Tensile (psi) | Ultimate Elongation % | Temp Range | Specifications |
|---|---|---|---|---|---|---|
| 60 | 1/16 - 1/2 | 48 | 700 | 300 | -80°F to +450°F | A-A-59588 (ZZ-R-765) Grade Sheeting 2A & 2B Grade 60, AMS 3303, ASTM D 2000 M1GE605, FDA 21 CFR 177 2600 |
Sil-Pad® 2000
1) The ASTM D5470 test fixture was used. The recorded value includes iinterfacial thermal resistance. These values are provided for reference only. Actual application perfomance is directly related to the surface roughness, flatness, and pressure applied.
Sil-Pad 2000 is a high performance, thermally conductive insulator designed for demanding aerospace and commercial applications.
Sil-Pad2000 is a silicone elastomer formulated to maximize the thermal and dielectric performance of the filler/ binder matrix. The result is a grease-free conformable material capable of meeting or exceeding the thermal and electrical requirements of high-reliability electronic packaging applications.
Features and Benefits:
- Thermal impedance 0.38°C-in2 /W (@50 psi)
- Optimal heat transfer
- High Thermal conductivity: 3.5 W/m-k
Typical Applications:
- Aerospace
- Avionics
- Motor Controls
- Power Semiconductors
- Power Supplies
- U. L. File Number E59150
| PROPERTY | IMPERIAL VALUE | METRIC VALUE | TEST METHOD |
|---|---|---|---|
| Color | White | White | Visual |
| Reinforcement Carrier | Fiberglass | Fiberglass | - |
| Thickness (inch) / (mm) | 0.010 to 0.020 | 0.254 to 0.508 | ASTM D374 |
| Hardness (Shore A) | 90 | 90 | ASTM D2240 |
| Continous Use temp (°F) / (°C) | -76 to 392 | -60 to 200 | - |
| ELECTRICAL | |||
| Dielectric Breakdown Voltage (Vac) | 4000 | 4000 | ASTM D149 |
| Dielectric Constant (1000 Hz) | 4 | 4.0 | ASTM D150 |
| Volume Resistivity (Ohm-meter) | 10 11 | 1011 | ASTM D257 |
| Flame Rating | V-O | V-O | U.L.94 |
| THERMAL | |||
| Thermal Conductivity (W/m-K) | 3.5 | 3.5 | ASTM D5470 |
| THERMAL PERFORMANCE vs PRESSURE | |||||
|---|---|---|---|---|---|
| Pressure (psi) | 10 | 25 | 50 | 100 | 200 |
| TO-220 Thermal Performance (°C/W) | 2.61 | 2.32 | 2.02 | 1.65 | 1.37 |
| Thermal Impedance (°C-in 2 /W) (1) | 0.57 | 0.43 | 0.38 | 0.35 | 0.30 |
