BAT54TQ/STQ
SURFACE MOUNT SCHOTTKY BARRIER DIODE
Product Summary
Features
Ultra-Small Surface Mount Package
Low Forward Voltage Drop
Fast Switching
PN Junction Guard Ring for Transient and ESD Protection
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
The DIODES™ BAT54TQ/STQ are suitable for automotive
applications requiring specific change control; these parts
are AEC-Q101 qualified, PPAP capable, and manufactured in
IATF 16949 certified facilities.
VRRM (V)
IF (mA)
VFmax (V)
IRmax (μA)
30
200
1
2
https://www.diodes.com/quality/product-definitions/
Description
200mA surface mount Schottky Barrier Diode in SOT523 package,
offers low turn-on voltage and fast switching capability, designed with
PN Junction Guard Ring for Transient and ESD Protection, totally
lead-free finish and RoHS compliant, “Green” device.
Mechanical Data
Package: SOT523
Package Material: Molded Plastic, “Green” Molding Compound.
UL Flammability Classification Rating 94V-0
Moisture Sensitivity: Level 1 per J-STD-020
Terminals: Finish - Matte Tin Annealed over Alloy 42 Leadframe.
Solderable per MIL-STD-202, Method 208
Lead-Free Plating
Polarity: See Diagrams Below
Weight: 0.002 grams (Approximate)
Top View
BAT54TQ
BAT54STQ
Ordering Information (Note 4)
Packing
Part Number
Package
Qty.
3,000
3,000
Carrier
Tape & Reel
Tape & Reel
BAT54TQ-7-F
BAT54STQ-7-F
SOT523
SOT523
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
xx = Product Type Marking Code
L1 = BAT54TQ
L4 = BAT54STQ
YM & YM = Date Code Marking
Y & Y = Year (ex: J = 2022)
M = Month (ex: 9 = September)
Date Code Key
Year
2018
…
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
Code
F
…
J
K
L
M
N
O
P
R
S
T
Month
Code
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1
2
3
4
5
6
7
8
9
O
N
D
1 of 5
www.diodes.com
October 2022
© 2022 Copyright Diodes Incorporated. All Rights Reserved.
BAT54TQ/STQ
Document number: DS40845 Rev. 2 - 2