
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