2023-11//asahicrosslink.com

AL-8M-033

Product Datasheet

Properties
LED Compatibility [distribution angle 6°～12°]
6.80×6.80mm, flat top

UV-A | Visible | Infrared

Material: ASR-A80MC Clear Silicone
A80/S±5 hardness

ROHS3 Compliant

Refractive index 1.41±0.03

REACH UnaffectedTransmission Ratio (%)(25°C, D-line 589nm)

Test Type

Test Method

Test Conditions

PeriodAppearance

Change in Transmittance⊿T (%)

Yellowing⊿YI

Thermal ShockJEITA ED-4701
300 307-40°C > 120°C
15min 15 min

500 cycles

No cracks orother defects

0.32

1.09

High TemperatureStorage

JEITA ED-4701
200 201

Ta=150°C

1000hrNo cracks orother defects

0.69

1.55

High Temp andHumidity Storage

JEITA ED-4701
100 103

Ta=85°C RH=85%

1000hrNo cracks orother defects

0.99

0.76

Low Temperature
Storage

JEITA ED-4701
200 202

Ta=-40°C

1000hrNo cracks orother defects

0.45

0.06

Solvent Resistance

JEITA ED-4701
500 501

Solvent: IPA
20-25°C
5 minutes

1 timeNo cracks orother defects--

Drop Test-

Drop on 20mm steel
plate from 1m

5 times

No cracks orother defects--1009080706050403020100200

400600reference measurement t=2mm

800

1000

1200

Wavelength (nm)1400
Control

1600

1800

2000

after (1712h@220°C)

2023-11//asahicrosslink.com

AL-8M-033

Product Datasheet

Attachment Guide
1. LED to Lens Adhesion (Recommended)

2. Lens to Mounted LED Adhesion

LED~0.01g, ≒⌀4mm
Adhesive (3535 LED)

~0.01g, ≒⌀4mm
Adhesive (3535 LED)
Secure in place and cure

LED

Jig

Ensure no floating or tilting of lens before curing

3. Lens to PCB Adhesionroughly
0.05~0.10g Adhesive

Ensure your selected adhesive:(Types 1 and 2)
LEDEnsure no floating or tilting of lens before curing
Recommended for opaque or room temp-curing adhesives-Has appropriate transparency-Does not yellow(Type 3)

-Has high viscosity(All Cases)-Is silicone based-Has low siloxane levels-Has appropriate strength-Is compatible with your processes

Adhesive Recommendations
Maker

Dow Corning

MomentiveShin-Etsu Silicone

Product Number

SE9186L

TSE3221S

X-32-1964

Cure Condition

20°C, 55%×6h

100°C×3h

100°C×3h(Room Temp Cure)-or- 130°C×1h

Viscosity

25 Pa·s

58 Pa·s

0.025 Pa·s

TypeRoom Temp Cure(1 Component)

Heat Cure(1 Component)

Heat Cure(1 Component)

Adhesion Method

Lens to PCB (3)4. MechanicalFastener

LED to Lens / Lens to LED (1, 2)Secure a plate with a hole of ~5% larger diameter than the lens optic, fitted over the lensCare must be taken to ensure no scraping or other physical damage to the lens optic when mounting

Securing Plate
This method allows easier lens replacement
while preserving the LED, where desired

2023-11//asahicrosslink.com

AL-8M-033

Product Datasheet

Photometrics

Directivity with NSCU033B ~8°Asahi Rubber, Inc.

Silicone Rubber (ASR-A80MC) UV Durability Testing

Test Method
UV-LED lit for extended duration; collected pre- and post-test transmittance data compared.

Test Description

Test Illustration

LED Package

Nichia NVSU233A (365nm)

Drive Current

1.4A (specification max)Radiant Flux

1442mW (Nichia reference value)

CoolingHeat sink with forced air

Ambient Temp.

25°CDuration

6300 Hours

Heat Sink
Table

FanDistance~2mm between LED and test piece

Test PieceLED

ASR-A80MC
25×25mm, t=2mm

NVSU233A

Measured Results (Change in Transmittance)
Some loss in transmittance below 320nm was observed. Conversely, increase in transmittance observed in 320nm~460nm range.
1009080Transmission Ratio [%]706050403020

初期値
Pre-Test

10

試験後
Post-Test

0200

300

400500600

700800

Wavelength [nm]Summary
1.

From ~320nm boundary, transmittance decreases in shorter wavelengths, yet increases in longer wavelengths.

2.

UV irradiation clearly causes a change in the optical qualities of the material; whether this can be considered degradation orlong-duration curing of a sort depends on one’s viewpoint.

3.

The material can be considered highly UV-durable at a reference wavelength of 365nm.

This test data is provided for reference purposes, and does not constitute a guarantee.

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2015.11.18