SURFACE MOUNT LED LAMPSStandard Type Mini-molded chip LEDs
SML-310 Series
GreenPure Green
Package Size（mm）

Yellow

OrangeGaPRed
GaAlAs on GaAs

GaAsP on Gap

555nm

570nm

585nm

610nm

650nm

660nm

SML-310PT

SML-310MT

SML-310YT

SML-310DT

SML-310VT

SML-310LT

1608(0603)
1.6x0.8
t=0.8■ Absolute Maximum Ratings（Ta=25℃）■ External Dimensions（Unit：mm）

Peak
Forward
Reverse Operating
Stotageforwardcurrent
voltage temperature temperature
current
IFVR
ToprTstg＊IFP（mW） （mA）
（V）
（°C）
（°C）
（mA）
PowerGreen

SML-310YT

YellowSML-310DT

OrangeSML-310VT

Red

SML-310LT

Red552060602575

4-30 to +850.8

Pure Green

SML-310MT-40 to +850.25

SML-310PT

0.8

Part No.

1.6 ＋0.2
01.2

Emitting dissipation
colorPD

Cathode mark

＊IFP measured under duty ≦1/ 5,pulse width ≦1ms.

■ Electrical Optical Characteristics（Ta=25℃）

Part No.

Resin Color

SML-310PT

SML-310DT

Reversecurrent
IR

Typ.
(V)

Max.
(µA)

IF(mA)

VR
(V)

2.2

SML-310MT
SML-310YT

Forwardvoltage
VF

Transparent
Clear

SML-310VT
SML-310LT

2.1
2.0
1.75

201004

Light wavelength
Peak Half-wave
λp∆λTyp.
(nm)

Typ.
(nm)

IF(mA)

Min.
( mcd)

1.4

4

3.6

16

2.2

6.3

40

650
25660

20

■ Directivity

Typ.
IF(mcd) (mA)

570
610

Tolerance:±0.1

Brightness
IV555
585

Terminal

1.0

1.4

4

3.6

16

X’

0°

Y’

30°

20

30°

60°

60°

90°
100

50

090°
10050

Relative brightness (%)(Typ.)■ Packaging Spacifications（Unit：mm）
Tape Spacifications：T86〈3,000pcs／reel〉

Reel Spacifications

Lavel Position

0.8

0.8

Feeding direction
43.5
5.5

1.9

The recommended thickness of the screen maskfor soldering is between 100 and 200μm. The
hole size of the screen mask should be same as
the recommended land pattern or smaller.

0.51.1（Unit：mm）

81.75

φ1.50.80.85

2φ131.0φ60
φ18011.4■ Recommemded Pad Layout

SURFACE MOUNT LED LAMPS■ Electrical Characteristic Curves
Forward Current - Forward Voltage

1.6

SML-310PT

Ta=25℃

RELATIVE LUMINOUS INTENSITYFORWARD CURRENT : IF (mA)

50

Relative Luminous Intensity - Case Temperature

SML-310MT

20

SML-310YT

10SML-310DT

5.0

SML-310VT
2.0

SML-310LT

1.00.50.20.1
1.5

2.02.5

SML-310PT
IF=20mA

SML-310YT
SML-310DT

1.2

SML-310VT
1.0

SML-310LT0.8
0.60.4

3.0

SML-310MT

1.4−20

FORWARD VOLTAGE : VF (V)020604080

CASE TEMPERATURE : Tc (℃)

Relative Luminous Intensity - Forward Current
3.02.5DC
2.0
DF=50%

1.5
1.020%
15%0.50010%
5%102030405060

PEAK FORWARD CURRENT : IF peak (mA)

SML-310PT
f=1kHzSML-310YT
DC

2.0

DF=50%20%00

SML-310DT

100Hz

200Hz

500Hz

1kHz2kHz5kHz10kHz20kHz50kHzRATIO of MAXIMUM TOLERABLE PEAK CURRENT

1001000

SML-310VT

PULSE DURATION : Tw (μs)

100002030405060Derating

SML-310LT

1010PEAK FORWARD CURRENT : IF peak (mA)

SML-310YT

115%
10%5%

0.5

SML-310MT

1SML-310LT

1.0

SML-310PT

3SML-310DT
SML-310VT

1.5

Ratio of Maximum Tolerable Peak Current - Pulse Duration
10SML-310MT

2.5

MAXIMUM FORWARD CURRENT : IF Max. (mA)

RELATIVE LUMINOUS INTENSITY

f=1kHzRELATIVE LUMINOUS INTENSITY

3.0

SML-310PT
SML-310MT

30SML-310YT
SML-310DT20SML-310VT
SML-310LT

10001020304050607080

AMBIENT TEMPERATURE : Ta (℃)

90AppendixNotes
No technical content pages of this document may be reproduced in any form or transmitted by anymeans without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for theproduct described in this document are for reference only. Upon actual use, therefore, please requestthat specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standarduse and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability ofwhatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell orotherwise dispose of the same, no express or implied right or license to practice or commerciallyexploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.

The products listed in this document are designed to be used with ordinary electronic equipment or devices(such as audio visual equipment, office-automation equipment, communications devices, electricalappliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level ofreliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and othersafety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.

Appendix1-Rev1.1