Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SOT23

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MMBTA42Q

NPN, 300V, 0.5A, SOT23

Datasheet

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Feature(s)

BV_CEO > 300V
Ideal for Medium Power Amplification and Switching
Complementary PNP Type: MMBTA92Q
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
The MMBTA42Q is suitable for automotive applications requiring specific change control; this part is AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949 certified facilities. https://www.diodes.com/quality/product-definitions/

Specifications & Technical Documents

Product Parameters

Compliance (Only Automotive Supports PPAP)	Automotive
Category	High Voltage Transistor
Polarity	NPN
VCEO, VCES (V)	300
IC (A)	0.5
ICM (A)	-
PD (W)	0.3
hFE (Min)	40
hFE (@ IC) (A)	0.01
h_FE(Min 2)	40
hFE (@ IC2) (A)	0.03
VCE(sat) Max (mV)	500
V_CE(SAT) (@ IC/IB) (A/mA)	0.02/2
VCE(sat) (Max.2) (mV)	-
VCE(sat) (@ IC/IB2) (A/mA)	-
fT (MHz)	50

Technical Documents

SPICE Model

MMBTA42Q.spice.txt

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

RoHSFile

Purchase & Availability

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products
PCN-2462	2020-05-08	2021-04-11	Phenitec Wafer Manufacturing Site Change, Additional Wafer Sources, Wafer Diameter Change, Additional Assembly and Test Site (Automotive)