Chemtronics CW7270 CircuitWorks Silicone Free Thermal Paste, 7g Syringe
Chemtronics CW7270 CircuitWorks Silicone Free Thermal Paste — 7g Syringe
CircuitWorks CW7270 is a silicone-free thermal interface paste engineered for electronics applications where silicone migration is a concern. Formulated with a heat-conductive filler in a heavy-consistency base, it maintains a positive thermal seal between components and heat sinks without drying out, hardening, or melting over the product lifecycle. It exceeds MIL-C-47113 thermal conductivity requirements and remains stable from -73°C to 200°C — covering the full range of industrial and electronic equipment operating conditions.
Key Specifications
- Part Number: CW7270
- Type: Silicone-free thermal paste
- Package: 7g (0.25 oz.) syringe
- Temperature Range: -99.4°F (-73°C) to 392°F (200°C)
- Thermal Conductivity: Exceeds MIL-C-47113
- Silicone: Silicone-free — no silicone migration risk
- Stability: Will not dry out, harden, or melt
- Properties: Noncorrosive, nonflammable, excellent dielectric properties
Applications
- Thermal interface between CPUs, power transistors, and heat sinks
- PCB component thermal management in electronics assemblies
- Applications where silicone contamination would cause coating adhesion or contact failure
- Military and aerospace electronics requiring MIL-C-47113 compliance
- Industrial electronics operating across wide temperature ranges
Frequently Asked Questions
Why choose a silicone-free thermal paste over standard silicone-based compounds?
Silicone-based thermal pastes can migrate and contaminate nearby surfaces — causing adhesion failures in conformal coatings, contact failures in connectors, and fouling of optical surfaces. CW7270's silicone-free formulation eliminates this risk, making it the correct choice for mixed-process environments and sensitive assemblies.
Does CW7270 dry out or require reapplication over time?
No — CW7270 is formulated to maintain its consistency and thermal interface properties over the product lifecycle. It will not dry out, harden, or melt under normal operating conditions within its rated temperature range.
What is MIL-C-47113 and does CW7270 meet it?
MIL-C-47113 is a US military specification for thermal interface compounds used in electronic equipment. CW7270 exceeds the thermal conductivity requirements of MIL-C-47113, making it suitable for defense and aerospace electronics applications.
How is CW7270 applied?
Dispense a small amount from the syringe onto the component surface or heat sink. Spread evenly with a spatula or applicator card to create a thin, uniform layer. Seat the heat sink and secure per manufacturer torque specifications. Excess paste should be wiped away.
Is CW7270 electrically conductive?
No — CW7270 has excellent dielectric properties and is electrically insulating, making it safe to apply to component surfaces without risk of short circuits.
