DS30105 Rev. 8 - 2 1 of 3 MMBT4124
www.diodes.com ã Diodes Incorporated
Features
Maximum Ratings @ TA= 25°C unless otherwise specified
A
E
JL
TOP VIEW
M
BC
H
G
D
K
C
BE
Mechanical Data
MMBT4124
NPN SMALL SIGNAL SURFACE MOUNT TRANSISTOR
·Epitaxial Planar Die Construction
·Complementary PNP Type Available (MMBT4126)
·Ideal for Medium Power Amplification and Switching
·Available in Lead Free/RoHS Compliant Version (Note 2)
·Case: SOT-23
·Case Material: Molded Plastic. UL Flammability
Classification Rating 94V-0
·Moisture Sensitivity: Level 1 per J-STD-020C
·Terminal Connections: See Diagram
·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
·Marking (See Page 2): K1B
·Ordering & Date Code Information: See Page 2
·Weight: 0.008 grams (approximate)
Characteristic Symbol MMBT4124 Unit
Collector-Base Voltage VCBO 30 V
Collector-Emitter Voltage VCEO 25 V
Emitter-Base Voltage VEBO 5.0 V
Collector Current - Continuous (Note 1) IC200 mA
Power Dissipation (Note 1) Pd300 mW
Thermal Resistance, Junction to Ambient (Note 1) RqJA 417 °C/W
Operating and Storage and Temperature Range Tj,T
STG -55 to +150 °C
Notes: 1. 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.
2. No purposefully added lead.
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
E
B
C
SPICE MODEL: MMBT4124
DS30105 Rev. 8 - 2 2 of 3 MMBT4124
www.diodes.com
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 30 ¾VIC= 10mA, IE = 0
Collector-Emitter Breakdown Voltage V(BR)CEO 25 ¾VIC= 1.0mA, IB = 0
Emitter-Base Breakdown Voltage V(BR)EBO 5.0 6.0 V IE = 10mA, IC = 0
Collector Cutoff Current ICBO ¾50 nA VCB = 20V, IE = 0V
Emitter Cutoff Current IEBO ¾50 nA VEB = 3.0V, IC = 0V
ON CHARACTERISTICS (Note 3)
DC Current Gain hFE 120
60
360
¾¾IC = 2.0mA, VCE = 1.0V
IC = 50mA, VCE = 1.0V
Collector-Emitter Saturation Voltage VCE(SAT) ¾0.30 V IC = 50mA, IB = 5.0mA
Base-Emitter Saturation Voltage VBE(SAT) ¾0.95 V IC = 50mA, IB = 5.0mA
SMALL SIGNAL CHARACTERISTICS
Output Capacitance Cobo ¾4.0 pF VCB = 5.0V, f = 1.0MHz, IE = 0
Input Capacitance Cibo ¾8.0 pF VEB = 0.5V, f = 1.0MHz, IC = 0
Small Signal Current Gain hfe 120 480 ¾VCE = 1.0V, IC = 2.0mA,
f = 1.0kHz
Current Gain-Bandwidth Product fT300 ¾MHz VCE = 20V, IC = 10mA,
f = 100MHz
Notes: 3. Short duration test pulse used to minimize self-heating effect.
4. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
5. For Lead Free/RoHS Compliant version part number, please add "-F" suffix to the part number above. Example: MMBT4124-7-F.
Ordering Information (Note 4)
Device Packaging Shipping
MMBT4124-7 SOT-23 3000/Tape & Reel
Marking Information
K1B
YM
K1B = Product Type Marking Code
YM = Date Code Marking
Y = Year ex: N = 2002
M = Month ex: 9 = September
Date Code Key
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
DS30105 Rev. 8 - 2 3 of 3 MMBT4124
www.diodes.com
0.1
1
10
0.1 1 10 100 1000
V , BASE-EMITTER (V)
BE(SAT)
SATURATION VOLTAGE
I , COLLECTOR CURRENT (mA)
C
Fig. 5, Typical Base-Emitter
Saturation Volta
g
e vs. Collector Current
IC
IB=10
0.01
0.1
1
0.1 1 10 100 1000
V , COLLECTOR-EMITTER (V)
CE(SAT)
SATURATION VOLTAGE
I , COLLECTOR CURRENT (mA)
C
Fig. 4, Typical Collector-Emitter
Saturation Volta
g
e vs. Collector Current
IC
IB=10
1
10
1000
100
0.1 110 1000
100
h , DC CURRENT GAIN
FE
I , COLLECTOR CURRENT (mA)
C
Fig. 3, Typical DC Current Gain vs
Collector Current
T = -25°C
A
T = +25°C
A
T = 125°C
A
V = 1.0V
CE
0
5
1
5
10
0.1 110 100
C , INPUT CAPACITANCE (pF)
IBO
C , OUTPUT CAPACITANCE (pF)
OBO
V , COLLECTOR-BASE VOLTAGE (V)
CB
Fig. 2, Input and Output Capacitance vs.
Collector-Base Volta
g
e
Cibo
Cobo
f=1MHz
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