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BRIGHT LED ELECTRONICS CORP.
SINCE 1981
BQ-N51DRD
Features :
1. 0.56 inch (14.2mm) Digit Height.
2. Continuous uniform segments.
3. Low power requirement.
4. Excellent characters appearance.
5. Solid state reliability.
6. Categorized for luminous intensity.
7. Multiplex drive common cathode.
Description :
1. The BQ-N51DRD is a 14.2mm (0.56")
high four digit seven segments display.
2. This product use super red chips,
which are made from AlGaAs on
GaAs substrate.
3. This product have a black face and
white segments.
4. This product doesn't contain restriction
substance, comply ROHS standard.
Package Dimensions :
8.10(.319)
8
14.20(.560)
50.00(1.969)
19.0(.748)
1.6(.063)
15.24(.600)
0.5(.020)
2.54x5=12.70(.500)
8.00(.315)
3.00(.118) MIN.
Notes:
1. All dimensions are in millimeters(inches).
2. Tolerance is ±0.25mm(.01")unless otherwise
specified.
3. Specifications are subject to change without
notice.
Internal Circuit Diagram :
佰鴻工業股份有限公司
http://www.brtled.com
Ver.11..01 Page 1 of 3

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BRIGHT LED ELECTRONICS CORP.
SINCE 1981
BQ-N51DRD
Absolute Maximum Ratings(Ta=25)
Parameter
Power Dissipation Per Segment
Forward Current Per Segment
Peak Forward Current Per Segment
Reverse Voltage Per Segment
Operating Temperature
Storage Temperature
Soldering Temperature
(1/16" From Body)
Symbol
Rating
Pd 80
IF
IFP
(Duty 1/10, 1KHZ)
VR
Topr
30
150
5
-40~80
Tstg -40~85
Tsol 260For 5 Seconds
Unit
mW
mA
mA
V
-
-
-
Electrical And Optical Characteristics(Ta=25)
Parameter
Symbol Condition Min. Typ. Max.
Forward Voltage Per Segment
Vf IF=10mA -
1.7 2.5
Luminous Intensity Per Segment
Iv IF=10mA - 7.5 -
Reverse Current Per Segment
IR VR=5V -
- 100
Peak Wave Length
λp IF=10mA
-
660
-
Dominant Wave Length
佰鴻工業股份有限公司Spectral Line Half-width
λd IF=10mA 638 - 648
λ IF=10mA
-
20
-
Unit
V
mcd
µA
nm
nm
nm
http://www.brtled.com
Ver.1.0 Page 2 of 3

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BRIGHT LED ELECTRONICS CORP.
SINCE 1981
BQ-N51DRD
Typical Electro-Optical Characteristics Curves
(25Ambient Temperature Unless Otherwise Noted)
Fig.1 Relative Radiant Intensity VS. Wavelength
1.0
0.5
0
570
600 630
660 690 720 750
Wavelength(nm)
Fig.2 Forward Current VS.
50 Forward Voltage
40
30
20
10
0
12345
Forward Voltage (V)
Fig.3 Relative Luminous
Intensity VS.
Ambient Temperature
3.0
2.5
2.0
1.5
1.0
0.5
0
-40 -20 0 20 40 60
Ambient Temperature Ta( C)
Fig.4 Relative Luminous
Fig.5 Forward Current
Intensity VS.
Derating Curve VS.
Forward Current
3.0
Ambient Temperature
50
佰鴻工業股份有40限公司
2.0
30
1.0 http://www.brtle20d.com
10
0.0
10 20 30 40 50
Forward Current(mA)
0
20 40 60 80 100 120
Ambient Temperature Ta( C)
Ver.1.0 Page 3 of 3