-1-

Nichia STSE-CW2157B-1

<Cat.No.040204>

1.SPECIFICATIONS
(1) Absolute Maximum Ratings (Ta=25癈)

Item

Symbol

Absolute Maximum Rating

Unit

Forward Current

30 mA

Pulse Forward Current

100

Reverse Voltage

Power Dissipation

120

Operating Temperature

opr

-30 ~ +

85 癈

Storage Temperature

stg

-40 ~ +100

癈

Soldering Temperature

sld

265癈 for 10sec.

Conditions : Pulse Width 10msec. and Duty 1/10

(2) Initial Electrical/Optical Characteristics

(Ta=25癈)

Item

Symbol

Condition

Min.

Typ.

Max.

Unit

Forward Voltage

=20[mA]

3.6

4.0

Reverse Current

= 5[V]

礎

Rank T

=20[mA]

5520 6400 7800 mcd

Rank S

=20[mA]

3900 4600 5520 mcd

Luminous Intensity

Rank R

=20[mA]

2760 3200 3900 mcd

! Luminous Intensity Measurement allowance is � 10%.

Color Ranks (I

=20mA,Ta=25癈)

Rank a0

Rank b1

x 0.280 0.264 0.283 0.296

x 0.287 0.283 0.330 0.330

y 0.248 0.267 0.305 0.276

y 0.295 0.305 0.360 0.339

Rank b2

Rank c0

x 0.296 0.287 0.330 0.330

x 0.330 0.330 0.361 0.356

y 0.276 0.295 0.339 0.318

y 0.318 0.360 0.385 0.351

! Color Coordinates Measurement allowance is � 0.01.
! One delivery will include up to two consecutive color ranks and three luminous intensity ranks of the products.

The quantity-ratio of the ranks is decided by Nichia.

2.TYPICAL INITIAL OPTICAL/ELECTRICAL CHARACTERISTICS

Please refer to figure's page.

3.OUTLINE DIMENSIONS AND MATERIALS

Please refer to figure's page.
Material as follows ; Resin(Mold)

: Epoxy Resin (over YAG Phosphor)

Leadframe

: Ag plating Copper Alloy

-2-

Nichia STSE-CW2157B

<Cat.No.031110>

4.PACKAGING

� The LEDs are packed in cardboard boxes after packaging in anti-electrostatic bags.

Please refer to figure's page.

The label on the minimum packing unit shows ; Part Number, Lot Number, Ranking, Quantity

� In order to protect the LEDs from mechanical shock, we pack them in cardboard boxes for transportation.
� The LEDs may be damaged if the boxes are dropped or receive a strong impact against them,

so precautions must be taken to prevent any damage.

� The boxes are not water resistant and therefore must be kept away from water and moisture.
� When the LEDs are transported, we recommend that you use the same packing method as Nichia.

5.LOT NUMBER

The first six digits number shows lot number.
The lot number is composed of the following characters;
"#$$$$ - !%

" - Year ( 2 for 2002, 3 for 2003 )

# - Month ( 1 for Jan., 9 for Sep., A for Oct., B for Nov. )

$$$$

- Nichia's Product Number

! - Ranking by Color Coordinates

- Ranking by Luminous Intensity

-3-

Nichia STSE-CW2157B

<Cat.No.031110>

6.RELIABILITY

(1) TEST ITEMS AND RESULTS

Test Item

Standard
Test Method

Test Conditions

Note

Number of
Damaged

Resistance to
Soldering Heat

JEITA ED-4701

300 302

Tsld=260 � 5癈, 10sec.

3mm from the base of the epoxy bulb

1 time

0/100

Solderability

JEITA ED-4701

300 303

Tsld=235 � 5癈, 5sec.
(using flux)

1 time

over 95%

0/100

Thermal Shock

JEITA ED-4701

300 307

0癈 ~ 100癈
15sec. 15sec.

100 cycles

0/100

Temperature Cycle

JEITA ED-4701

100 105

-40癈 ~ 25癈 ~ 100癈 ~ 25癈
30min.

5min.

30min.

5min.

100 cycles

0/100

Moisture Resistance Cyclic

JEITA ED-4701

200 203

25癈 ~ 65癈 ~ -10癈
90%RH 24hrs./1cycle

10 cycles

0/100

Terminal Strength
(bending test)

JEITA ED-4701

400 401

Load 5N (0.5kgf)
0� ~ 90� ~ 0� bend 2 times

No noticeable
damage

0/100

Terminal Strength
(pull test)

JEITA ED-4701

400 401

Load 10N (1kgf)
10 � 1 sec.

No noticeable
damage

0/100

High Temperature Storage

JEITA ED-4701

200 201

Ta=100癈

1000hrs.

0/100

Temperature Humidity
Storage

JEITA ED-4701

100 103

Ta=60癈, RH=90%

1000hrs.

0/100

Low Temperature Storage

JEITA ED-4701

200 202

Ta=-40癈

1000hrs.

0/100

Steady State Operating Life

Ta=25癈, I

=30mA 1000hrs.

0/100

Steady State Operating Life
of High Humidity Heat

60癈, RH=90%, I

=20mA 500hrs.

0/100

Steady State Operating Life
of Low Temperature

Ta=-30癈, I

=20mA 1000hrs.

0/100

(2) CRITERIA FOR JUDGING THE DAMAGE

Criteria for Judgement

Item

Symbol

Test Conditions

Min. Max.

Forward Voltage

=20mA -

U.S.L.*)$ 1.1

Reverse Current

=5V -

U.S.L.*)$ 2.0

Luminous Intensity

=20mA L.S.L.**)$ 0.7

*) U.S.L.

Upper Standard Level **) L.S.L.

Lower Standard Level

-4-

Nichia STSE-CW2157B

<Cat.No.031110>

7.CAUTIONS

The

LEDs are devices which are materialized by combining Blue LEDs and special phosphors.

Consequently, the color of the LEDs is changed a little by an operating current.
Care should be taken after due consideration when using LEDs.

(1) Lead Forming

� When forming leads, the leads should be bent at a point at least 3mm from the base of the epoxy bulb.

Do not use the base of the leadframe as a fulcrum during lead forming.
� Lead forming should be done before soldering.
� Do not apply any bending stress to the base of the lead. The stress to the base may damage the LED's
characteristics or it may break the LEDs.
� When mounting the LEDs onto a printed circuit board, the holes on the circuit board should be exactly
aligned with the leads of the LEDs. If the LEDs are mounted with stress at the leads, it causes
deterioration of the epoxy resin and this will degrade the LEDs.

(2) Storage

� The LEDs should be stored at 30癈 or less and 70%RH or less after being shipped from Nichia and
the storage life limits are 3 months. If the LEDs are stored for 3 months or more, they can be stored
for a year in a sealed container with a nitrogen atmosphere and moisture absorbent material.

� Nichia LED leadframes are comprised of a silver plated copper alloy. The silver surface may be
affected by environments which contain corrosive gases and so on. Please avoid conditions which
may cause the LED to corrode, tarnish or discolor. This corrosion or discoloration may cause difficulty
during soldering operations. It is recommended that the LEDs be used as soon as possible.
� Please avoid rapid transitions in ambient temperature, especially, in high humidity environments where
condensation can occur.

(3) Static Electricity
� Static electricity or surge voltage damages the LEDs.
It is recommended that a wrist band or an anti-electrostatic glove be used when handling the LEDs.
� All devices, equipment and machinery must be properly grounded. It is recommended that measures
be taken against surge voltage to the equipment that mounts the LEDs.
� When inspecting the final products in which LEDs were assembled, it is recommended to check
whether the assembled LEDs are damaged by static electricity or not. It is easy to find
static-damaged LEDs by a light-on test or a VF

test at a lower current (below 1mA is recommended).

� Damaged LEDs will show some unusual characteristics such as the leak current remarkably
increases, the forward voltage becomes lower, or the LEDs do not light at the low current.
Criteria : (V

> 2.0V at I

=0.5mA)

-5-

Nichia STSE-CW2157B

<Cat.No.031110>

(4) Soldering Conditions
� Nichia LED leadframes are comprised of a silver plated copper alloy. This substance has a low
thermal coefficient (easily conducts heat). Careful attention should be paid during soldering.
� Solder the LED no closer than 3mm from the base of the epoxy bulb. Soldering beyond the base
of the tie bar is recommended.
� Recommended soldering conditions

Dip Soldering

Soldering

Pre-Heat
Pre-Heat Time
Solder Bath
Temperature
Dipping Time
Dipping Position

120癈 Max.
60 seconds Max.
260癈 Max.

10 seconds Max.
No lower than 3 mm from the
base of the epoxy bulb.

Temperature
Soldering Time
Position

350癈 Max.
3 seconds Max.
No closer than 3 mm from the
base of the epoxy bulb.

� Do not apply any stress to the lead particularly when heated.
� The LEDs must not be repositioned after soldering.
� After soldering the LEDs, the epoxy bulb should be protected from mechanical shock or vibration until
the LEDs return to room temperature.
� Direct soldering onto a PC board should be avoided. Mechanical stress to the resin may be caused
from warping of the PC board or from the clinching and cutting of the leadframes. When it is
absolutely necessary, the LEDs may be mounted in this fashion but the User will assume responsibility
for any problems. Direct soldering should only be done after testing has confirmed that no damage,
such as wire bond failure or resin deterioration, will occur. Nichia's LEDs should not be soldered
directly to double sided PC boards because the heat will deteriorate the epoxy resin.
� When it is necessary to clamp the LEDs to prevent soldering failure, it is important to minimize
the mechanical stress on the LEDs.
� Cut the LED leadframes at room temperature. Cutting the leadframes at high temperatures may
cause failure of the LEDs.

(5) Heat Generation
� Thermal design of the end product is of paramount importance. Please consider the heat generation
of the LED when making the system design. The coefficient of temperature increase per input
electric power is affected by the thermal resistance of the circuit board and density of LED
placement on the board, as well as other components. It is necessary to avoid intense heat generation
and operate within the maximum ratings given in this specification.
� The operating current should be decided after considering the ambient maximum temperature of LEDs.

(6) Cleaning
� It is recommended that isopropyl alcohol be used as a solvent for cleaning the LEDs. When using
other solvents, it should be confirmed beforehand whether the solvents will dissolve the resin or not.
Freon solvents should not be used to clean the LEDs because of worldwide regulations.
� Do not clean the LEDs by the ultrasonic. When it is absolutely necessary, the influence of ultrasonic
cleaning on the LEDs depends on factors such as ultrasonic power and the assembled condition.
Before cleaning, a pre-test should be done to confirm whether any damage to the LEDs will occur.

-6-

Nichia STSE-CW2157B

<Cat.No.031110>

(7) Safety Guideline for Human Eyes
� In 1993, the International Electric Committee (IEC) issued a standard concerning laser product safety
(IEC 825-1). Since then, this standard has been applied for diffused light sources (LEDs) as well
as lasers. In 1998 IEC 60825-1 Edition 1.1 evaluated the magnitude of the light source.
In 2001 IEC 60825-1 Amendment 2 converted the laser class into 7 classes for end products.
Components are excluded from this system. Products which contain visible LEDs are now classified
as class 1. Products containing UV LEDs are class 1M. Products containing LEDs can be classified
as class 2 in cases where viewing angles are narrow, optical manipulation intensifies the light, and/or the
energy emitted is high. For these systems it is recommended to avoid long term exposure.
It is also recommended to follow the IEC regulations regarding safety and labeling

of products.

(8) Others

� Care must be taken to ensure that the reverse voltage will not exceed the absolute maximum rating
when using the LEDs with matrix drive.
� Flashing lights have been known to cause discomfort in people; you can prevent this by taking
precautions during use. Also, people should be cautious when using equipment that has had LEDs
incorporated into it.
� The LEDs described in this brochure are intended to be used for ordinary electronic equipment (such
as office equipment, communications equipment, measurement instruments and household appliances).
Consult Nichia's sales staff in advance for information on the applications in which exceptional quality
and reliability are required, particularly when the failure or malfunction of the LEDs may directly
jeopardize life or health (such as for airplanes, aerospace, submersible repeaters, nuclear reactor
control systems, automobiles, traffic control equipment, life support systems and safety devices).
� User shall not reverse engineer by disassembling or analysis of the LEDs without having prior written
consent from Nichia. When defective LEDs are found, the User shall inform Nichia directly before
disassembling or analysis.
� The formal specifications must be exchanged and signed by both parties before large volume purchase begins.
� The appearance and specifications of the product may be modified for improvement without notice.

Allo

wabl

e

Fo

rwa

r
d
Cu

t I

(mA

)

l
a
tiv

e
Lu

n
o
sity

(
a
.
u
.
)

l
a
t
i
v
e
Luminosity

(a.u.

)

Forward Current I

(mA)

l
owa

b
l
e

rward C

urren

t
I

(mA

)

Ambient Temperature vs.

Allowable Forward Current

Ambient Temperature Ta (癈)

Ambient Temperature vs.

Relative Luminosity

Ambient Temperature Ta (癈)

Ambient Temperature vs.

Forward Voltage

Ambient Temperature Ta (癈)

a
r
d
V

o
ltag

e

V

)

Duty Ratio (%)

Forward Current vs.

Relative Luminosity

rward C

u
rren

t
I

(mA

)

Forward Voltage V

(V)

Forward Voltage vs.

Forward Current

Duty Ratio vs.

Allowable Forward Current

100

200

100

2.0

1.0

0.5

0.2

200
100

2.5

3.0

3.5

4.0

4.5

5.0

100 120

60 80 100

-40 -20

0 20

60 80 100

-40 -20

5.4

4.6

4.2

3.4

3.0

2.6

3.8

5.0

4.0

3.0
2.5

1.5
1.0
0.5

2.0

3.5

10 20

100

Ta=25癈

=5mA

=20mA

=60mA

=20mA

-8-

a
t
.
N

o
.
031110

i
c
h
i
a

S
T

S
E

-
C

2157

TYP.CHARACTERISTICS

Model

NSPWxxxx

NICHIA CORPORATION

Title

No.

011210110251

Y-Y

X-X

e
lati

ission I

n
ten

s
i
t
y
(

a
.u.)

tiv

e

L

u
m

i
nosi

t
y
(a.u.)

Ambient Temperature vs.

Chromaticity Coordinate

Directivity (NSPW300BS)

Spectrum

Forward Current vs.

Chromaticity Coordinate

Radiation Angle

Wavelength

(nm)

Ta=25癈

=20mA

0.5

0.29 0.30 0.31 0.32 0.33 0.34

0.35

0.34

0.33

0.31

0.30

0.32

0.35

0.33

0.30

0.34

0.32

0.31

350

450

550

750

650

1.2

0.8

0.4

0.2

0.6

0.29 0.30 0.31 0.32 0.33 0.34

0�

30�

0.5

90�

60�

0�

10� 20�

30�

40�

50�

60�

70�

80�

90�

-30癈

0癈

25癈

50癈

85癈

1mA

20mA

50mA

100mA

5mA

Ta=25癈

=20mA

Ta=25癈

=20mA

-9-

a
t
.
N

o
.
0
31110

i
c
h
i
a

S
T

S
E

-
C

215
7
B

TYP.CHARACTERISTICS

Model

NSPW300BS

NICHIA CORPORATION

Title

No.

011210110261

Anti-electrostatic bag

Cardboard box B
360!135!215!4t

Cardboard

Cardboard box A

The cardboard box B contains

2 cardboard box A at maximum.

Label

Put this label on the cardboard box B.

The quantity is printed on this bag.

N I C H I A

XXXX

LED

TYPE NxPxxxxxx

LOT xxxxxx-!"
QTY pcs

NICHIA CORPORATION

491 OKA,KAMINAKA,ANAN,TOKUSHIMA,JAPAN

CAUTION TO
ELECTROSTATIC DAMAGE

XXXX LED

TYPE NxPxxxxxx
LOT xxxxxx-!"
QTY PCS

NICHIA

NICHIA CORPORATION

491 OKA, KAMINAKA, ANAN, TOKUSHIMA,

JAPAN

Nichia STSE-CW21

5
7B

<Cat.No.031110>

NICHIA CORPORATION

No.

PACKING

031029201113

Title

Model

NxPxxxxxx

-12-

The cardboard box B contains 4 cardboard box A at maximum.

Anti-electrostatic bag

Cardboard box B
425!135!355!4t

Cardboard

Cardboard box A

Cardboard

Label

The quantity is printed on this bag.

Put this label on the cardboard box B.

N I C H I A

XXXX

LED

TYPE NxPxxxxxx

LOT xxxxxx-!"
QTY pcs

NICHIA CORPORATION

491 OKA,KAMINAKA,ANAN,TOKUSHIMA,JAPAN

CAUTION TO
ELECTROSTATIC DAMAGE

XXXX LED

TYPE NxPxxxxxx
LOT xxxxxx-!"
QTY PCS

NICHIA

NICHIA CORPORATION

491 OKA, KAMINAKA, ANAN, TOKUSHIMA,

JAPAN

Nichia STSE-CW21

5
7B

<Cat.No.031110>

NICHIA CORPORATION

No.

PACKING

031029201133

Title

Model

NxPxxxxxx

-14-

协谢械泻褌褉芯薪薪褘泄 泻芯屑锌芯薪械薪褌: NSPW300

协谢械泻褌褉芯薪薪褘泄泻芯屑锌芯薪械薪褌: NSPW300