DOWSIL 1-4173 Thermally Conductive Silicone Adhesive

Features Of DOWSIL 1-4173 Thermally Conductive Silicone Adhesive

1. High thermal conductivity (1.5 W/m·K) for efficient heat dissipation in demanding electronic assemblies.

2. Low modulus silicone formulation provides excellent stress relief and long-term reliability under thermal cycling.

3. Room-temperature vulcanizing (RTV) cure with tack-free time of ~30 minutes and full cure in 24 hours at 25°C/50% RH.

4. Excellent adhesion to common substrates including aluminum, copper, FR-4, and molded plastics without primers.

5. UL 94 V-0 rated for flame resistance and compliant with RoHS 2015/863/EU and REACH SVHC regulations.

Typical Applications Of DOWSIL 1-4173 Thermally Conductive Silicone Adhesive

1. Thermal interface bonding of power modules, IGBTs, and MOSFETs to heat sinks in EV inverters and onboard chargers.

2. Die-attach and heat sink attachment in high-power LED lighting systems requiring long-life thermal stability.

3. Permanent thermal bonding of sensors, battery management system (BMS) components, and DC-DC converters.

4. Structural thermal attachment in industrial motor drives, renewable energy inverters, and rail traction electronics.

Specifications Of DOWSIL 1-4173 Thermally Conductive Silicone Adhesive

DOWSIL 1-4173 Thermally Conductive Silicone Adhesive – Frequently Asked Questions (FAQ)

Q1: What is the primary application of DOWSIL 1-4173?

A: DOWSIL 1-4173 is a one-component, thermally conductive silicone adhesive designed for bonding and heat dissipation in electronic assemblies—commonly used to attach heat sinks, power modules, LED housings, and other components where reliable thermal management and mechanical adhesion are required.

Q2: Does this adhesive require mixing or curing with external agents?

A: No. DOWSIL 1-4173 is a moisture-curing, one-component formulation that cures at room temperature upon exposure to atmospheric humidity—no mixing, catalysts, or heat cure cycles are needed, though elevated temperature can accelerate cure.

Q3: How does it perform under thermal cycling and long-term elevated temperatures?

A: As a silicone-based material, DOWSIL 1-4173 maintains flexibility and adhesion across wide temperature ranges and demonstrates excellent resistance to thermal aging and repeated thermal cycling—making it suitable for demanding automotive, industrial, and power electronics environments.

Q4: Is surface preparation required before application?

A: Yes. For optimal adhesion and long-term reliability, substrates should be clean, dry, and free of oils, dust, or release agents. Light abrasion or solvent wiping (e.g., with isopropyl alcohol) is recommended for low-energy surfaces such as certain plastics or coated metals.

Q5: Can it be used in applications requiring electrical insulation?

A: Yes. DOWSIL 1-4173 provides high dielectric strength and volume resistivity, offering effective electrical insulation while simultaneously enabling efficient heat transfer—ideal for isolating sensitive components without compromising thermal performance.