Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SOT363

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MMDT3946Q

Complementary, 40V, 0.2A, SOT363

Datasheet

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Description

This Bipolar Junction Transistor (BJT) is designed to meet the stringent requirements of Automotive Applications.

Feature(s)

BVCEO >40V
IC = 200mA High Collector Current
Ultra-Small Surface Mount Package
Epitaxial Planar Die Construction
Ideal for Low Power Amplification and Switching
Totally Lead-Free & Fully RoHS Compliant
Halogen and Antimony Free. "Green" Device
Qualified to AEC-Q101 Standards for High Reliability
PPAP Capable

Specifications & Technical Documents

Product Parameters

Compliance (Only Automotive Supports PPAP)	Automotive
Category	Small Signal Transistor
Polarity	NPN + PNP
VCEO, VCES (V)	40
IC (A)	0.2
PD (W)	0.2
hFE (Min)	100
hFE (@ IC) (A)	0.01
h_FE(Min 2)	30
hFE (@ IC2) (A)	0.1
VCE(sat) Max (mV)	200. 250
V_CE(SAT) (@ IC/IB) (A/mA)	0.01/1
VCE(sat) (Max.2) (mV)	300. 400
VCE(sat) (@ IC/IB2) (A/mA)	0.05/5
fT (MHz)	300

Technical Documents

SPICE Model

MMDT3946Q.spice.txt

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

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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)