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BM
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57
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Ver.1.0 Page 1 of 3
SINCE 1981
● Package Dimensions :
74.80(2.945)
76.20(3.000)
5.08x6=30.48(1.200)
104.60(4.118)
0.80(.031)
PIN 1.
3.00(.118) MIN.
12.80(.504)
12.0x12.0
(.472x.472)
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.
● Features :
1. 4.118 inch (104.6mm) matrix height.
2. Square size 12.0 × 12.0mm.
3. Low power requirement.
4. Excellent characters appearance.
5. Solid state reliability.
6. Multiplex drive , column anode com.
and row cathode com.
7. Single color available.
8. Categorized for luminous intensity.
9. Stackable vertically and horizontally.
● Description :
1. The BM-41257MD is a 104.6mm (4.118")
matrix height 5×7 square matrix display.
2. This product use green chips, which
are made from GaP on GaP substrate.
3. This product have a black face and
white squares.
4. This product doesn't contain restriction
substance, comply ROHS standard.
● Internal Circuit Diagram :
佰鴻工業股份有限公司
http://www.brtled.com
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Ver.1.0 Page 2 of 3
SINCE 1981
● Absolute Maximum Ratings(Ta=25℃)
Parameter Symbol Rating Unit
Power Dissipation Per Square Pd 160 mW
Forward Current Per Square IF 30 mA
Peak Forward Current Per Square IFP
(Duty 1/10, 1KHZ) 150 mA
Reverse Voltage Per Square VR 5 V
Operating Temperature Topr -40℃~80℃ -
Storage Temperature Tstg -40℃~85℃ -
Soldering Temperature
(1/16" From Body) Tsol 260℃ For 5 Seconds -
● Electrical And Optical Characteristics(Ta=25℃)
Parameter Symbol Condition Min. Typ. Max. Unit
Forward Voltage Per Square VF I
F=10mA - 4.2 5.0 V
Luminous Intensity Per Square Iv IF=10mA - 15.0 - mcd
Reverse Current Per Square IR VR=5V - - 100
µA
Peak Wave Length λp IF=10mA - 568 - nm
Dominant Wave Length λd IF=10mA 569 - 574 nm
Spectral Line Half-width ∆λ IF=10mA - 30 - nm
佰鴻工業股份有限公司
http://www.brtled.com
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M-
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MD
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Ver.1.0 Page 3 of 3
SINCE 1981
● Typical Electro-Optical Characteristics Curves
(25℃ Ambient Temperature Unless Otherwise Noted)
Forward Voltage (V)
Forward Current (mA)
12345
0
10
20
30
40
50
Fig.2 Forward Current VS.
Forward Voltage
Wavelength(nm)
Relative Radiant Intensity
Fig.1 Relative Radiant Intensity VS. Wavelength
Ambient Temperature Ta( C)
Forward Current(mA)
Relative Luminous Intensity
-40 -20 0 20 40 60
0
0.5
1.0
1.5
2.0
2.5
3.0
Fig.3 Relative Luminous
Intensity VS.
Ambient Temperature
Fig.4 Relative Luminous
Intensity VS.
Forward Current
10 20 30 40 50
1.0
2.0
3.0
0
460 490
0.5
520 550
1.0
640580 610
Ambient Temperature Ta( C)
Fig.5 Forward Current
Forward Current(mA)
0
10
20
4020 60
40
50
Derating Curve VS.
80 100
30
120
Ambient Temperature
(@20mA)
Relative Luminous Intensity
(@20mA)
0.0
0
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http://www.brtled.com
