NESW157B Nichia, NESW157B Datasheet - Page 3

• Manufacturer Part Number: NESW157B
• Manufacturer: Nichia

Specifications of NESW157B

• Size Lxwxh (mm): 3.0x1.4x0.52
• Lumi-nous Inten-sity Typ(cd): 6.7
• Lumi-nous Flux Typ(lm)): 20.0
• Forward Voltage Vf(v) Typ: 2.90
• Forward Voltage Vf(v) Max: 3.10
• Directivity (degree): 120
• If (ma): 50
• Mounting Style: Through Hole

RANKS
Color Ranks
Luminous Flux Ranks by Color Rank
* Ranking at T
* Tolerance of measurements of the Forward Voltage is ±0.05V.
* Tolerance of measurements of the Luminous Flux is ±7%.
* Tolerance of measurements of the Chromaticity Coordinate is ±0.005.
* A shipment shall consist of LEDs in a combination of the above ranks.
Forward Voltage
Luminous Flux
Ranking by
Color Coordinates
b3
b4,b5,b6,c1,c2
The percentage of each rank in the shipment shall be determined by Nichia.
x
y
x
y
x
y
Item
0.287
0.295
0.296
0.276
0.330
0.339
A
=25°C.
0.283
0.305
0.287
0.295
0.330
0.360
-
P9
P8
P7
Luminous Flux
Rank b3
Rank b5
Ranking by
Rank c1
Rank
0.304
0.330
0.307
0.315
0.361
0.385
P7
21.4
18.0
15.1
Min
2.7
0.307
0.315
0.311
0.294
0.357
0.361
P8
25.5
21.4
18.0
Max
3.1
P9
x
y
x
y
x
y
Unit
lm
V
0.307
0.315
0.311
0.294
0.330
0.318
0.304
0.330
0.307
0.315
0.330
0.339
Rank b4
Rank b6
Rank c2
0.330
0.360
0.330
0.339
0.357
0.361
0.330
0.339
0.330
0.318
0.356
0.351
2