Chiltern Connections lighting the way
Materials such as, thermal compounds, silicones, conformal coatings and encapsulation resins and potting materials have become widely used in the manufacturing of LEDs by design engineers. The reason for this is to improve LED performance, product life and to provide protection from environments.
The Main Applications
- Automotive lighting
- Airport lighting
- Aviation lighting
- Domestic lighting
- LCD screen backlights
- Machine lighting
- Rail signal lighting
- Road signal lighting
- Sport advertising signage
- Stage & theatre lighting
- Street lighting
See the tables below for recommended products supplied by Chiltern Connections that are aimed at providing LED systems engineers, designers and manufacturers with the right products and solutions for all their LED encapsulant, potting and environmental requirements. These requirements include moisture ingress, thermal stability and thermal shock, together with the ability to withstand a wide range of virbration frequencies and vibration shock.
| LED Encapsulants, Coating and Potting Material Products |
||||||
|---|---|---|---|---|---|---|
| Grade Number |
QSil218 | QSil12 | SC3001 | UR5634 | UR5635 | AFA |
| Colour | Clear | Hazy |
Clear | Clear | Pearl | Clear |
| Material Type |
2 Part Silicone |
2 Part Silicone | 2 Part Silicone | 2 Part Urethane |
2 Part Urethane | 1 Part Acrylic |
| Application and Benefits |
Water clear potting |
Self bonding diffuse potting |
Inibition resistance to cables & gromets |
Flexible and tough crystal clear, low colour shift |
Flexible and tough diffuses light output |
Conformal coating, low colour shift, no aromatics |
| Density | 1.01 | 0.99 | 1.04 | 1.11 | 1.12 | 0.92 |
| Mixed Viscosity (cp) |
3000 | 1100 | 1080 | 1050 | 1050 | 285 |
| Mix Ratio by volume |
10:1 | 20:1 | 12:1 | 1:1 | 1:1 | none |
| Pot Life (mins) |
360 | 120 | 30 | 15 | 15 | N/A |
| Fixture Time (mins) |
TBA | TBA | 120 | 20 | 20 | 4 |
| Full Cure (hrs) |
24-48 | 24 | 24 | 24 | 24 | 24 |
| Shore Hardness |
59A | 19A | 20A | 80A | 80A | N/A |
| Thermal Conductivity (W/m.k) |
0.18 | 0.18 | 0.18 | 0.2 | 0.2 | 0.2 |
| Operating Temperature (°C) | - 60 to + 200 |
- 55 to + 220 |
- 60 to + 200 |
- 40 to + 120 |
- 40 to + 120 |
- 65 to + 125 |
| Approvals | meets UL94HB |
UL94V0 | ||||
| Thermal Compounds and Greases | ||||||||
|---|---|---|---|---|---|---|---|---|
| Grade Number | G747 | G776 | G777 | G779 | X-23-7868-2D | X-23-7921-5 | G1000 | HTCX |
| Colour | White | White | White | White | Grey | Grey | White | White |
| Material Type | Silicone Grease |
Silicone Grease |
Silicone Grease |
Silicone Grease |
Silicone Grease |
Silicone Grease |
Semi Cure Silicone Grease |
Non Silicone Grease |
| Application and Benefits |
General Purpose |
Contains solvent to ease processing and interface |
General Purpose |
Heat ageing properties enhanced |
High TC contains solvent to ease processing and interface |
High TC low resistance |
Cures to form skin reducing migration |
No silicone content, improved bleed |
| Density | 2.65 | 2.9 | 3.4 | 3.21 | 2.5 | 2.8 | 3.04 | 2.61 |
| Viscosity (cp) |
50 | 58 | 178 | 160 | 100 | 363 | 80 | 141 |
| Penetration | 328 | 359 | 190 | 190 | 300 | |||
| Thermal Resistance (mm?2.K/W) |
38 @ 35 micron |
7.4 @ 7.8 micron |
21 @ 56 micron |
11 @ 25 micron |
5 @ 30 micron |
7 @ 25 micron |
30 @ 50 micron |
|
| Thermal Conductivity (W/m.K) |
0.9 | 1.3 | 3.1 | 2.95 | 6.2 | 6 | 2.4 | 1.3 |
| Operating Temperature (°C) |
-50 to +150 | -40 to +200 | -40 to +200 | -40 to +200 | -50 to +120 | -50 to +120 | -40 to +150 | -50 to +180 |
| Sealing, Thermal Adhesives and Potting | |||||||
|---|---|---|---|---|---|---|---|
| Grade Number | AS1802 | AS1700 | AS1724 | AS1726 | QSil553 | ER2220 | UR5633 |
| Colour | Light Grey | Translucent | Translucent | Translucent | Dark Grey | Grey | Grey |
| Material Type | 1 Part Silicone | 1 Part Silicone | 1 Part Silicone | 1 Part Silicone | 2 Part Silicone | 2 Part Epoxy | 2 Part Urethane |
| Application and Benefits |
Thermally conductive Non corrosive adhesive |
Non corrosive paste sealant |
Non corrosive semi flowable sealant |
Non corrosive highly flowable sealant |
Flame retardant thermally conductive potting |
Flame retardant thermally conductive potting |
Flexible flame retardant thermally conductive |
| Density | 2.2 | 1.1 | 1.05 | 1.04 | 1.6 | 2.2 | 1.65 |
| Mixed Viscosity (cp) |
350000 | Paste | 44000 | 3100 | 4500 | 15000 | 30000 |
| Mix Ratio by Volume |
none | none | none | none | 1.1 | 8:2:1 | 8:8:1 |
| Pot Life (mins) | none | none | none | none | 70 | 120 | 15 |
| Fixture time (mins) | 3 | 10 | 10 | 10 | TBA | 360 | 40 |
| Full Cure (hrs) | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Shore Hardness | 67A | 30A | 19A | 30A | 32A | 90D | 90A |
| Thermal Conductivity (W/m.K) | 2.2 | 0.2 | 0.2 | 0.2 | 0.68 | 1.54 | 1.24 |
| Operating Temperature (°C) | -50 to +220 | -50 to +220 | -20 to +200 | -50 to +200 | -55 to +260 | -40 to +130 | -50 to +125 |
| Approvals | UL94V0 approved |
Meets UL94V0 | Meets UL94V0 | ||||
