MMBT5551Q
160V NPN SMALL SIGNAL TRANSISTOR IN SOT23
Description
Mechanical Data
This bipolar junction transistor (BJT) is designed to meet the stringent
requirements of automotive applications.
Case: SOT23
Case Material: Molded Plastic, "Green" Molding Compound;
UL Flammability Rating 94V-0
Moisture Sensitivity: Level 1 per J-STD-020
Terminals: Finish—Matte Tin Plated Leads
Solderable per MIL-STD-202, Method 208
Weight: 0.008 grams (Approximate)
Features
BVCEO > 160V
Ideal for Low Power Amplification and Switching
Complementary PNP Type Available (MMBT5401)
Totally Lead-Free & Fully RoHS compliant (Notes 1 & 2)
Halogen- and Antimony-Free. “Green” Device (Note 3)
The MMBT5551Q 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/
SOT23
C
E
E
C
B
B
Top View
Pin-Out
Top View
Device Symbol
Ordering Information (Note 4)
Part Number
Marking
K4N
Reel size (inches)
Tape width (mm)
Quantity per reel
MMBT5551Q-7
7
8
3,000
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
4. For packaging details, go to our website at https://www.diodes.com/design/support/packaging/diodes-packaging/.
Marking Information
SOT23
K4N = Product Type Marking Code
YM = Date Code Marking
Y = Year (ex: H = 2020)
M = Month (ex: 9 = September)
K 4 N
Date Code Key
2028
2029
Year
2020
2021
2022
2023
2024
2025
2026
2027
P
R
Code
H
I
J
K
L
M
N
O
Month
Code
Jan
1
Feb
2
Mar
3
Apr
4
May
5
Jun
6
Jul
7
Aug
8
Sep
9
Oct
O
Nov
N
Dec
D
1 of 6
www.diodes.com
August 2020
© Diodes Incorporated
MMBT5551Q
Document number: DS42560 Rev. 1 - 2