SOT-23
Dim Min Max
A0.37 0.51
B1.20 1.40
C2.30 2.50
D0.89 1.03
E0.45 0.60
G1.78 2.05
H2.80 3.00
J0.013 0.10
K0.903 1.10
L0.45 0.61
M0.085 0.180
a0°8°
All Dimensions in mm
DS30048 Rev. 6 - 2 1 of 3 MMBT6427
www.diodes.com ã Diodes Incorporated
MMBT6427
NPN SURFACE MOUNT DARLINGTON TRANSISTOR
Characteristic Symbol Value Unit
Collector-Base Voltage VCBO 40 V
Collector-Emitter Voltage VCEO 40 V
Emitter-Base Voltage VEBO 12 V
Collector Current - Continuous (Note 2) IC500 mA
Power Dissipation (Note 2) Pd300 mW
Maximum Ratings @ TA= 25°C unless otherwise specified
A
C
B
E
JL
TOP VIEW
M
BC
H
G
D
K
E
Mechanical Data
·Case: SOT-23
·Case Material: Molded Plastic. UL Flammability
Classification Rating 94V-0
·Moisture Sensitivity: Level 1 per J-STD-020C
·Terminals: Solderable per MIL-STD-202, Method 208
·Also Available in Lead Free Plating (Matte Tin Finish
annealed over Alloy 42 leadframe). Please see Ordering
Information, Note 5, on Page 2
·Terminal Connections: See Diagram
·Marking (See Page 2): K1D
·Ordering & Date Code Information: See Page 2
·Weight: 0.008 grams (approximate)
E
B
C
Features
·Epitaxial Planar Die Construction
·Ideal for Medium Power Amplification and Switching
·High Current Gain
·Available in Lead Free/RoHS Compliant Version (Note 1)
Note: 1. No purposefully added lead.
2. Device mounted on FR-4 PCB, 1 inch x 0.85 inch x 0.062 inch; pad layout as shown on Diodes Inc. suggested pad layout
document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
Thermal Characteristics @ TA = 25°C unless otherwise specified
Characteristic Symbol Value Unit
Thermal Resistance, Junction to Ambient (Note 2) RqJA 417 °C/W
Operating and Storage and Temperature Range Tj,T
STG -55 to +150 °C
SPICE MODEL: MMBT6427
DS30048 Rev. 6 - 2 2 of 3 MMBT6427
www.diodes.com
0
50
100
25 50 75 100 125 150 175 200
P , POWER DISSIPATION (mW)
D
T , AMBIENT TEMPERATURE (°C)
A
Fig. 1, Max Power Dissipation vs
Ambient Tem
p
erature
150
200
250
300
350
0
110 100 1000
V,C
O
LLECT
O
RT
O
EMITTER
CE(SAT)
SATURATION VOLTAGE (V)
I , COLLECTOR CURRENT (mA)
C
Fig. 2, Collector Emitter Saturation Voltage
vs. Collector Current
T = 25°C
A
T = -50°C
A
T = 150°C
A
0.45
0.40
0.50
0.55
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
1.10
1.05
1.00
IC
IB
= 1000
Electrical Characteristics @ TA = 25°C unless otherwise specified
Characteristic Symbol Min Max Unit Test Condition
OFF CHARACTERISTICS (Note 3)
Collector-Base Breakdown Voltage V(BR)CBO 40 ¾VIC= 100mA, IE = 0
Collector-Emitter Breakdown Voltage V(BR)CEO 40 ¾VIC= 10mA, IB = 0
Emitter-Base Breakdown Voltage V(BR)EBO 12 ¾VIE = 10mA, IC = 0
Collector Cutoff Current ICBO ¾50 nA VCB = 30V, IE= 0
Collector Cutoff Current ICEO ¾1.0 mAVCE = 25V, IB = 0
Emitter Cutoff Current IEBO ¾50 nA VEB = 10V, IC = 0
ON CHARACTERISTICS (Note 3)
DC Current Gain hFE
10,000
20,000
14,000
100,000
200,000
140,000
¾
IC = 10mA, VCE = 5.0V
IC = 100mA, VCE = 5.0V
IC = 500mA, VCE = 5.0V
Collector-Emitter Saturation Voltage VCE(SAT) ¾1.2
1.5 VIC= 50mA, IB = 0.5mA
IC = 500mA, IB = 0.5mA
Base-Emitter Saturation Voltage VBE(SAT) ¾2.0 V IC = 500mA, IB = 0.5mA
Base-Emitter On Voltage VBE(ON) ¾1.75 V IC = 50mA, VCE =5.0V
SMALL SIGNAL CHARACTERISTICS
Output Capacitance Cobo 8.0 Typical pF VCB = 10V, f = 1.0MHz, IE = 0
Input Capacitance Cibo 15 Typical pF VEB = 0.5V, f = 1.0MHz, IC = 0
Note: 3. Short duration test pulse used to minimize self-heating effect.
DS30048 Rev. 6 - 2 3 of 3 MMBT6427
www.diodes.com
1
10
1000
100
110 100
f , GAIN BANDWIDTH PRODUCT (MHz)
T
I , COLLECTOR CURRENT (mA)
C
Fig. 5, Gain Bandwidth Product
vs Collector Current
V=5V
CE
100
1000
100000
1000000
10000
110 1000
100
h , DC CURRENT GAIN
FE
I , COLLECTOR CURRENT (mA)
C
Fig. 3, DC Current Gain vs
Collector Current
T = -50°C
A
T = 25°C
A
T = 150°C
A
V=5V
CE
0.1 110 100
V , BASE EMITTER VOLTAGE (V)
BE(ON)
I , COLLECTOR CURRENT (mA)
C
Fig. 4, Base Emitter Voltage
vs. Collector Current
T = 25°C
A
T = -50°C
A
T = 150°C
A
0.3
0.2
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1
.
6
1.5
1.4
V= 5V
CE
Device Packaging Shipping
MMBT6427-7 SOT-23 3000/Tape & Reel
Notes: 4. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
5. For Lead Free version/RoHS Compliant version part number, please add "-F" suffix to the part number above.
Example: MMBT6427-7-F.
Ordering Information (Note 4)
Month Jan Feb March Apr May Jun Jul Aug Sep Oct Nov Dec
Code 1234567
89 OND
Year 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Code JKLMNPR
ST U VW
Date Code Key
Marking Information
K1D = Product Type Marking Code
YM = Date Code Marking
Y = Year ex: N = 2002
M = Month ex: 9 = September
K1D
YM
