INTEGRATED T-1 3/4 RESISTOR LAMPS
5 VOLT AND 12 VOLT SERIES
RED
HIGH EFFICIENCY RED
YELLOW
GREEN
PACKAGE DIMENSIONS
.200 (5.10)
.180 (4.57)
MR3050/MR3051
MR3750/MR3751
MR3350/MR3351
MR3450/MR3451
TINTED
TINTED
TINTED
TINTED
FEATURES
• Integral current limiting resistor (No external resistor required)
• Operates with 5 volt & 12 volt supplies
• Wide viewing angle
.455 (11.56)
.425 (10.79)
.040 (1.02)
.350 (8.89)
.330 (8.38)
• Solid state reliability
.90 (22.8)
.055 (1.40) 2X
.045 (1.15)
DESCRIPTION
These T-1 3/4 LED lamps contain an integral
resistor. Operation at 5 volts (MR3X50) or 12 volts
(MR3X51) is possible without the use of an exter-
nal current limiting resistor. The epoxy lens is tint-
ed and diffused to provide color identification and
a wide viewing angle.
0.050 (1.27)
.50 (1.27)
.100 (2.54)
Ø .230 (5.84)
.100 (2.54)
NOTES:
ALL DIMENSIONS ARE IN INCHES (mm).
.025 (0.64)
SQ. TYP. (2X)
2001 Fairchild Semiconductor Corporation
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INTEGRATED T-1 3/4 RESISTOR LAMPS
5 VOLT AND 12 VOLT SERIES
ABSOLUTE MAXIMUM RATING
Parameter
DC Forward Current
Lead Soldering Time at 260° C
Reverse Breakdown Voltage
Operating Temperature
Storage Temperature
(T
A
=25°C)
RED/HER/YELLOW
12 VOLT LAMPS
15
5
5.0
-40 to +100
-55 to +100
GREEN
5 VOLT LAMPS
7.5
5
5.0
-20 to +100
-50 to +100
GREEN
12 VOLT LAMPS
15
5
5.0
-20 to +100
-50 to +100
UNITS
mA
sec
I
R
= 100µA
°C
°C
RED/HER/YELLOW
5 VOLT LAMPS
7.5
5
5.0
-40 to +100
-55 to +100
ELECTRICAL / OPTICAL CHARACTERISTICS
Parameter
Luminous Intensity (mcd)
Minimum
Typical
Forward Current (mA)
Typical
Maximum
Peak Wavelength (nm)
Spectral Line Half Width (nm)
Viewing Angle (°)
13/13
20/20
660
24
60
1.0
2.0
RED
MR3050/1
(T
A
=25°C)
YELLOW
MR3350/1
1.5
4.0
10/13
15/20
585
36
60
GREEN
MR3450/1
1.5
4.0
V
F
= 5V / V
F
= 12V
12/13
15/20
565
28
60
V
F
= 5V / V
F
= 12V
V
F
= 5V / V
F
= 12V
V
F
= 5V / V
F
= 12V
Condition
V
F
= 5V / V
F
= 12V
HER
MR3750/1
1.5
4.0
10/13
15/20
635
40
60
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INTEGRATED T-1 3/4 RESISTOR LAMPS
5 VOLT AND 12 VOLT SERIES
TYPICAL PERFORMANCE CURVES
24
(T
A
=25°C)
I
F
- DC FORWARD CURRENT (mA)
20
5V
16
12 V
12
8
4
0
0
2
4
6
8
7.5
10
12
14
15
16
V
F
- FORWARD VOLTAGE (V)
Fig. 1 I - V Curve
2.5
1.5
IV - REL. LUMINOUS INTENSITY
2.0
IV - REL. LUMINOUS INTENSITY
1.0
1.5
1.0
0.5
GaAsP
HIGH EFFICIENCY
RED, YELLOW, GREEN
0.5
GaAsP
HIGH EFFICIENCY
RED, YELLOW, GREEN
0
0
2
4
6
8
10
0
0
2
4
6
8
10
12
14
16
18
20
V
F
- FORWARD VOLTAGE (V)
5 - VOLT DEVICE
V
F
- FORWARD VOLTAGE (V)
12 - VOLT DEVICE
Fig. 2A Luminous Intensity
vs Forward Voltage
16
15
Fig. 2B Luminous Intensity
vs Forward Voltage
V
F
- FORWARD VOLTAGE (V)
-20˚
-30˚
-40˚
-50˚
-60˚
-70˚
-80˚
-90˚
100
80
60
40
-10˚
0˚
10˚
20˚
30˚
40˚
50˚
60˚
70˚
80˚
12
12 V
8
7.5
4
5V
20
0
20
40
60
80
90˚
100
REL. LUMINOUS INTENSITY (%)
0
0
20
40
60
80
100
Fig. 3 Radiation Diagram
T
A
- AMBIENT TEMPERATURE (˚C)
Fig. 4 Maximum Allowed Forward Voltage
vs Ambient Temperature
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INTEGRATED T-1 3/4 RESISTOR LAMPS
5 VOLT AND 12 VOLT SERIES
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE
TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT
ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT
DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE
RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical
implant into the body,or (b) support or sustain life,
and (c) whose failure to perform when properly
used in accordance with instructions for use provided
in labeling, can be reasonably expected to result in a
significant injury of the user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
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