LAIRD CRS-124CRS-124
Harmonization Code : 3824.99.92.97 | Prepared binders for foundry molds or cores; chemical products and preparations of the chemical or allied industries (including those consisting of mixtures of natural products), not elsewhere specified or included: other : other : other
Main features
- Custom Cast Microwave Loads
- Above-1-GHz RF Attenuation
- Impact-Resistant Silicone Elastomer
Product Description
Eccosorb CRS-124 Castable Silicone Load Absorber is a two-part, magnetically loaded RTV silicone for forming lossy microwave and RF structures above 1 GHz. The 100:1 Part A-to-Part B weight ratio produces a castable elastomer that can be poured into cavities or molded into cones, wedges, pyramids, terminations, and load shapes. The cured material combines Shore A 75 hardness, 1.0 W/(m K) thermal conductivity, low water absorption, and high volume resistivity. It can also be painted onto surfaces for current suppression or poured in place for microwave gaskets. Applications include microwave loads, RF terminations, cavity filling, antennas, transmission lines, and microwave-tube assemblies.
Key features
- Castable RF Absorber: Two-part silicone can be poured or molded into custom microwave load geometries.
- Above-1-GHz Loss Profile: CRS-124 provides high-loss behavior and calculated attenuation data above 1 GHz.
- Elastomeric Cured Form: Shore A 75 silicone can be shaped to contoured surfaces and withstand impact or shock.
Applications / Suitable for
- Microwave loads and terminations
- RF cavity filling and current suppression
- Microwave gaskets and absorber shapes
- Antennas and transmission lines
TDS, SDS & Technical Documents
Technical Specifications
Thermal Properties
General Properties
Chemical Properties
Electrical Properties
Additional Information
As-supplied / before-processing properties
As-supplied and processing values for the CRS-124 two-part castable system before final cure.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| System format | Two-part | Part A resin and Part B catalyst | |
| Part A form | High-viscosity paste | Mix Part A to homogeneity before proportioning | |
| Mix ratio by weight | 100:1.00 | Part A to Part B for CRS-124 | |
| Shelf life | approximately 6 | months | Unmixed in a well-sealed container |
| Maximum storage temperature | 25 | deg C | Unmixed material |
| Cure schedule | overnight or 3 | hours | Room temperature overnight or 80 deg C for 3 hours |
After-processing / final-state properties
Typical cured CRS-124 properties and theoretical attenuation values for design comparison.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Frequency range | greater than 1 | GHz | Cured CRS-124 |
| Typical attenuation | 20 / 63 / 67 / 149 | dB/cm | Calculated at 3.0 / 8.6 / 10.0 / 18.0 GHz; comparison only |
| Service temperature | less than 160 | deg C | Cured material |
| Thermal conductivity | 1.0 | W/(m K) | Cured material |
| Hardness | 75 | Shore A | Cured material |
| Water absorption | less than 0.1 | % | 24-hour test |
| Dielectric strength | greater than 10 | V/mil | Cured material |
| Volume resistivity | greater than 1 x 10^10 | ohm cm | Cured material |
