DS30105 Rev. 5 - 2
1 of 2
MMBT4124
Features
Maximum Ratings
@ T
A
= 25
C unless otherwise specified
A
E
J
L
TOP VIEW
M
B C
H
G
D
K
C
B
E
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
Case: SOT-23, Molded Plastic
Case Material - UL Flammability Rating
Classification 94V-0
Moisture sensitivity: Level 1 per J-STD-020A
Terminals: Solderable per MIL-STD-202,
Method 208
Terminal Connections: See Diagram
Marking (See Page 2): K1B
Ordering & Date Code Information: See Page 2
Weight: 0.008 grams (approx.)
Characteristic
Symbol
MMBT4124
Unit
Collector-Base Voltage
V
CBO
30
V
Collector-Emitter Voltage
V
CEO
25
V
Emitter-Base Voltage
V
EBO
5.0
V
Collector Current - Continuous (Note 1)
I
C
200
mA
Power Dissipation (Note 1)
P
d
300
mW
Thermal Resistance, Junction to Ambient (Note 1)
R
qJA
417
C/W
Operating and Storage and Temperature Range
T
j
, 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.
SOT-23
Dim
Min
Max
A
0.37
0.51
B
1.20
1.40
C
2.30
2.50
D
0.89
1.03
E
0.45
0.60
G
1.78
2.05
H
2.80
3.00
J
0.013
0.10
K
0.903
1.10
L
0.45
0.61
M
0.085
0.180
a
0
8
All Dimensions in mm
E
B
C
DS30105 Rev. 5 - 2
2 of 2
MMBT4124
Electrical Characteristics
@ T
A
= 25
C unless otherwise specified
Characteristic
Symbol
Min
Max
Unit
Test Condition
OFF CHARACTERISTICS (Note 2)
Collector-Base Breakdown Voltage
V
(BR)CBO
30
V
I
C
= 10
mA, I
E
= 0
Collector-Emitter Breakdown Voltage
V
(BR)CEO
25
V
I
C
= 1.0mA, I
B
= 0
Emitter-Base Breakdown Voltage
V
(BR)EBO
5.0
6.0
V
I
E
= 10
mA, I
C
= 0
Collector Cutoff Current
I
CBO
50
nA
V
CB
= 20V, I
E
= 0V
Emitter Cutoff Current
I
EBO
50
nA
V
EB
= 3.0V, I
C
= 0V
ON CHARACTERISTICS (Note 2)
DC Current Gain
h
FE
120
60
360
I
C
= 2.0mA, V
CE
= 1.0V
I
C
= 50mA, V
CE
= 1.0V
Collector-Emitter Saturation Voltage
V
CE(SAT)
0.30
V
I
C
= 50mA, I
B
= 5.0mA
Base- Emitter Saturation Voltage
V
BE(SAT)
0.95
V
I
C
= 50mA, I
B
= 5.0mA
SMALL SIGNAL CHARACTERISTICS
Output Capacitance
C
obo
4.0
pF
V
CB
= 5.0V, f = 1.0MHz, I
E
= 0
Input Capacitance
C
ibo
8.0
pF
V
EB
= 0.5V, f = 1.0MHz, I
C
= 0
Small Signal Current Gain
h
fe
120
480
V
CE
= 1.0V, I
C
= 2.0mA,
f = 1.0kHz
Current Gain-Bandwidth Product
f
T
300
MHz
V
CE
= 20V, I
C
= 10mA,
f = 100MHz
Notes:
2. Short duration test pulse used to minimize self-heating effect.
3. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Ordering Information
(Note 3)
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
1
2
3
4
5
6
7
8
9
O
N
D
Year
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
Code
J
K
L
M
N
P
R
S
T
U
V
W
PDF 
ZIP