2023-12//asahicrosslink.com

AL-20M-DUV280

Product Datasheet

Properties
LED Compatibility [distribution angle 20°±]
6.80×6.80mm, flat top

UV-C | UV-B

Material: DUV280 Clear Silicone
A50 hardness

ROHS3 Compliant

Refractive index 1.40

REACH Unaffected(25°C, D-line 589nm)

Test Type

Test Method

Test Conditions

PeriodAppearance

280nm TransmittancePost-Test (t=2mm)

Thermal Shock--40°C > 100°C
15min 15min

100 cycles

No cracks or otherdefects

84.5%

High Temperature
Storage

JEITA ED-4701
200 201

Ta=150°C

1,000hr

No cracks or otherdefects

82.7%Humidity Resistance-Ta=30°C RH=60%

1,000hr

No cracks or otherdefects

83.5%

Low Temperature
Storage

JEITA ED-4701
200 202

Ta=-40°C

1,000hr

No cracks or otherdefects

88.4%

Solvent Resistance

JEITA ED-4701
500 501

Solvent: IPA
23±5°C, 5min

1 timeNo cracks or otherdefects

89.1%

High Temperature
Resistance-Ta=200°C

500hr

No cracks or otherdefects

89.1%

100

Transmittance (%)

8060
40200200300

reference measurement t=2mm

400

500
Wavelength (nm)

600

700
control

800

after (1000h@200°C)

ＳＰＥＣＩＦＩＣＡＴＩＯＮＳ＜仕様図＞
ＲＥＦＥＲＥＮＣＥ＜参考図＞＜表面処理＞

ＳＹＭ

ＲＥＶＩＳＩＯＮ

ＲＥＶＲ

ＡＰＰＲ

２ ×

＜仕上げ＞

ＦＩＮＩＳＨＤＡＴＥＣＡＤ[ Ｃ／ Ｐ ・ ＺＲＤ ]

１ ×

＜熱処理＞

ＨＥＡＴ ＴＲＥＡＴＭＥＮＴ

432ＳＵＲＦＡＣＥ ＴＲＥＡＴＭＥＮＴ

Ｄｒａｗｉｎｇ Ｐａｐｅｒ ｆｏｒ Ｒｕｂｂｅｒ Ｐａｒｔｓ

1３ ×A

A

9.5(φ6.2)

9.5

2 - R0.5

BB

2 - C1.5

非球面

C

1.1

4.8

C

1.65ﾟ

R0.2
6.8

80

6.890100

D70

E

60

R0.350ＮＯＴＥ）

3040・指示なき公差：C適用
・推奨LEDサイズ 6.8×6.8mm・レンズ曲率は参考形状となります。

20

ＬＥＳＳ THAN

010OVERA

B

C±0.2±0.１±0.１

6 TO 20±0.３±0.2±0.１

OVER 20 TO 50±0.５±0.３±0.２

OVER 20 TO 100±1.0±0.５±0.３

OVER 100 TO 300±2.0±1.0±0.５

OVER 300 TO 500±5.0±2.5±1.0

ＡＮＧＬＥ
Ａ4ＶT－031112

61

ＭＡＴＥＲＩＡＬ（ＣＯＭＰＯＵＮＤ）

ＯＲＩＧＩＮＡＬ ＤＡＴＥTOLERANCE UNLESS SPECIFIED

RANGE

2021/12/23
ＵＮＩＴ

ＳＣＡＬＥ

5：1
ＳＩＺＥmm

ＴＩＴＬＥ

シリコーン
ＣＯＬＯＲ

３ＲＤ ＡＮＧＬＥ ＳＹＳＴＥＭＤＲＡＷＩＮＧ ＮＯ．

透明

AL-20M-DUV280
21122301T

ＨＡＲＤＮＥＳＳ

Ａ４

株式会社朝日ラバー±２°

23

ＤＥＳＩＧＮＤＲＡＷＮＣＨＥＣＫＥＤＡＰＰＲＯＶＥＤ

S.Tonegawa

S.Tonegawa

T.Kanahira

M.Tasaki

4F2023-12//asahicrosslink.com

AL-20M-DUV280

Product Datasheet

Attachment Guide
1. Lens to PCB Adhesionroughly
0.05~0.10g Adhesive

Ensure your selected adhesive:

LED-Is silicone based-Has low siloxane levels-Has high viscosity-Has appropriate strength-Is compatible with your processes-Is suitable for the UV environment or is protected from the irradiation

Ensure no floating or tilting of lens before curing
Recommended for opaque or room temp-curing adhesives

2. MechanicalFastener

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

2023-12

AL-20M-DUV280

Product Datasheet

Photometrics

Directivity with NSCU334B ~20°//asahicrosslink.com

Asahi Rubber, Inc.

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Silicone Resin (DUV280）
UV Durability Testing

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

Continuous Operation Test Description
LEDPackage

Nichia NCSU334B（@280nm）

DriveCurrent

IF=500mA（specification max）RadiantFluxΦe=70mW（@350mA）

CoolingHeat sink with forced airAmbientTemp

TA=25℃Duration

20,000 hours

Distance～2mm between LED and test piece

Test Illustration
Heat Sink

Test Piece
DUV28025×25mm, t=2mm

UV-LED
NCSU334B

Measured Results（Change in Transmittance after 20,000hr）

Summary
No abnormal appearance (damage, cracks, discoloration, etc.) was confirmed after the test.

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

2023.11.8