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MMBTA55 / MMBTA56
PNP SMALL SIGNAL SURFACE MOUNT TRANSISTOR
Features
• Epitaxial Planar Die Construction
• Complementary NPN Types Available (MMBTA05 /
MMBTA06)
• Ideal for Low Power Amplification and Switching
• Lead, Halogen and Antimony Free, RoHS Compliant
"Green" Device (Notes 3 and 4)
• Qualified to AEC-Q101 Standards for High Reliability
Mechanical Data
• Case: SOT-23
• Case Material: Molded Plastic. UL Flammability
Classification Rating 94V-0
• Moisture Sensitivity: Level 1 per J-STD-020d
• Terminal Connections: See Diagram
• Terminals: Solderable per MIL-STD-202, Method 208
• Lead Free Plating (Matte Tin Finish annealed over Alloy
42 leadframe).
• MMBTA55 Marking (See Page 3): K2H, K2G
• MMBTA56 Marking (See Page 3): K2G
• Ordering Information: See Page 3
• Weight: 0.008 grams (approximate)
Maximum Ratings @T
Characteristic Symbol MMBTA55 MMBTA56 Unit
Collector-Base Voltage
Collector-Emitter Voltage
Emitter-Base Voltage
Collector Current - Continuous (Note 1)
Power Dissipation (Note 1)
Thermal Resistance, Junction to Ambient (Note 1)
Operating and Storage Temperature Range
= 25°C unless otherwise specified
A
A
C
TOP VIEW
BE
E
D
G
H
J
C
B
V
CBO
V
CEO
V
EBO
IC
Pd
R
JA
θ
Tj, T
STG
B
C
K
L
E
M
-60 -80 V
-60 -80 V
-4.0 V
-500 mA
300 mW
417
-55 to +150
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
α
0° 8°
All Dimensions in mm
°C/W
°C
Electrical Characteristics @T
= 25°C unless otherwise specified
A
Characteristic Symbol Min Max Unit Test Condition
OFF CHARACTERISTICS (Note 2)
Collector-Base Breakdown Voltage MMBTA55
MMBTA56
Collector-Emitter Breakdown Voltage MMBTA55
MMBTA56
Emitter-Base Breakdown Voltage
Collector Cutoff Current MMBTA55
MMBTA56
Collector Cutoff Current MMBTA55
MMBTA56
ON CHARACTERISTICS (Note 2)
DC Current Gain
Collector-Emitter Saturation Voltage
Base-Emitter Saturation Voltage
SMALL SIGNAL CHARACTERISTICS
Current Gain-Bandwidth Product
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. Short duration pulse test used to minimize self-heating effect.
3. No purposefully added lead. Halogen and Antimony Free.
4. Product manufactured with Data Code V9 (week 33, 2008) and newer are built with Green Molding Compound. Product manufactured prior to Date Code
V9 are built with Non-Green Molding Compound and may contain Halogens or Sb
DS30054 Rev. 11 - 2 1 of 3
V
V
V
(BR)CBO
(BR)CEO
(BR)EBO
I
CBO
I
CEX
hFE
V
CE(SAT)
V
BE(SAT)
fT
www.diodes.com
-60
-80
-60
-80
-4.0
⎯
⎯
100
⎯
⎯
50
Fire Retardants.
2O3
⎯
⎯
⎯
-100 nA
-100 nA
⎯ ⎯
-0.25 V
-1.2 V
⎯
MHz
V
IC = -100μA, IE = 0
V
IC = -1.0mA, IB = 0
V
IE = -100μA, IC = 0
VCB = -60V, IE = 0
VCB = -80V, IE = 0
V
= -60V, IBO = 0V
CE
V
= -80V, IBO = 0V
CE
IC = -10mA, VCE = -1.0V
IC = -100mA, V
IC = -100mA, IB = -10mA
IC = -100mA, VCE = -1.0V
VCE = -1.0V, IC = -100mA,
f = 100MHz
= -1.0V
CE
MMBTA55 / MMBTA56
© Diodes Incorporated

400
Note 1
350
300
N (mW)
I
250
A
200
DISSI
150
,
100
D
50
EMI
LLE
CE(SAT)
V,
SATURATION VOLTAGE (V)
0.25
0.20
0.15
0.10
0.05
I
C
= 10
I
B
T= 25°C
A
T = 150°C
A
T = -50°C
A
1,000
100
FE
h, D
10
100
0
0
25 50
T , AMBIENT TEMPERATURE (°C)
A
75
100 125
Fig. 1 Max Power Dissipation vs
Ambie nt Temper at ure
V= 5V
CE
T= 25°C
A
1
I , COLLECTOR CURRENT (mA)
C
10
T = -50°C
A
100
Fig. 3 DC Current Gain vs. Collector Current
175
150
T = 150°C
A
200
1,000
0
110
I , COLLECTOR CURRENT (mA)
C
100
1,000
Fig. 2 Collector Emitter Saturation Voltage
vs. Collector Current
1.0
0.9
E (V)
0.8
0.7
0.6
V= 5V
CE
T= -50°C
A
T= 25°C
A
0.5
0.4
T = 150°C
0.3
BE(ON)
V , BASE EMI
0.2
A
0.1
10.1
I , COLLECTOR CURRENT (mA)
C
Fig. 4 Base Emitter Voltage vs. Collector Current
10 100
z)
(M
V= 5V
CE
10
DWID
-BA
AI
T
f,
1
110
I , COLLECTOR CURRENT (mA)
C
Fig. 5 Gain-Bandwidth Product vs. Collector Current
DS30054 Rev. 11 - 2 2 of 3
100
www.diodes.com
MMBTA55 / MMBTA56
© Diodes Incorporated

Ordering Information (Note 5)
Device
MMBTA55-7-F
MMBTA56-7-F
Notes: 5. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Packaging Shipping
SOT-23 3000/Tape & Reel
SOT-23 3000/Tape & Reel
Marking Information
Date Code Key
Year 1998 1999 2000 2001 2002 2003 2004
Code J K L M N P R
Month Jan Feb Mar Apr May Jun Jul
Code 1 2 3 4 5 6 7
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product
described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall
assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website,
harmless against all damages.
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written
approval of the President of Diodes Incorporated.
K2x
K2x = Product Type Marking Code, ex: K2H = MMBTA55
YM = Date Code Marking
YM
Y = Year ex: N = 2002
M = Month ex: 9 = September
2005 2006 2007 2008 2009 2010 2011 2012
S T U V W X Y Z
Aug Sep Oct Nov Dec
8 9 O N D
IMPORTANT NOTICE
LIFE SUPPORT
DS30054 Rev. 11 - 2 3 of 3
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MMBTA55 / MMBTA56
© Diodes Incorporated