
DS30106 Rev. 5 - 2 2 of 3 MMBT4126
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 -25 ¾VIC= -10mA, IE = 0
Collector-Emitter Breakdown Voltage V(BR)CEO -25 ¾VIC= -1.0mA, IB = 0
Emitter-Base Breakdown Voltage V(BR)EBO -4.0 ¾VIE = -10mA, IC = 0
Collector Cutoff Current ICBO ¾-50 nA VCB = -20V, IE = 0V
Emitter Cutoff Current IEBO ¾-50 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) ¾-0.40 V IC = -50mA, IB = -5.0mA
Base-Emitter Saturation Voltage VBE(SAT) ¾-0.95 V IC = -50mA, IB = -5.0mA
SMALL SIGNAL CHARACTERISTICS
Output Capacitance Cobo ¾4.5 pF VCB = -5.0V, f = 1.0MHz, IE = 0
Input Capacitance Cibo ¾10 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 fT250 ¾MHz VCE = -20V, IC = -10mA,
f = 100MHz
Noise Figure NF ¾4.0 dB VCE = -5.0V, IC = -100mA,
RS = 1.0kW, f = 1.0kHz
Month Jan Feb March Apr May Jun Jul Aug Sep Oct Nov Dec
Code 1234567
89 OND
K2B = Product Type Marking Code
YM = Date Code Marking
Y = Year ex: N = 2002
M = Month ex: 9 = September
K2B
YM
Marking Information
Device Packaging Shipping
MMBT4126-7 SOT-23 3000/Tape & Reel
Ordering Information
Date Code Key
(Note 4)
Note: 3. Short duration pulse test 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: MMBT4126-7-F.
Year 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Code JKLMNPR
ST U VW