BAT54ALT3G Equivalent & Substitute Parts

Part Overview

The BAT54ALT3G is a Schottky diode array manufactured by onsemi, configured as 1 pair common anode with a maximum reverse voltage of 30 V and average rectified current of 200 mA per diode. The device is housed in a SOT-23-3 (TO-236-3, SC-59) surface mount package and is rated for operating junction temperatures from -55°C to 150°C.

The BAT54ALT3G is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. Active alternatives with identical or compatible electrical and mechanical specifications are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Anode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io) (per Diode)	200	mA (DC)
Voltage - Forward (Vf) (Max) @ If	800	mV @ 100 mA
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	2	µA @ 25 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BAT54ALT3G is determined by the following critical parameters:

Electrical Compatibility Requirements:

Diode configuration: 1 Pair Common Anode
Technology: Schottky
Maximum reverse voltage (Vr): 30 V minimum
Average rectified current (Io): 200 mA minimum per diode
Forward voltage (Vf): 800 mV or lower @ 100 mA
Reverse recovery time (trr): 5 ns or faster
Reverse leakage current: 2 µA or lower @ 25 V

Mechanical Compatibility Requirements:

Mounting type: Surface Mount
Package / Case: TO-236-3, SC-59, SOT-23-3 (primary) or SC-70, SOT-323 (alternative package with identical electrical performance)
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into the following categories based on their relationship to the BAT54ALT3G:

Direct Manufacturer Equivalents: Parts from onsemi with identical part number variants (BAT54ALT1G, SBAT54ALT1G, SBAT54ALT3G) that meet all electrical and mechanical specifications with active product status.

Parametric Equivalents: Parts from alternative manufacturers (Nexperia, Infineon, Diodes Incorporated, Micro Commercial Co) that meet all critical electrical parameters and package requirements, with active product status and RoHS3 compliance.

Similar Parts: Parts with minor variations in forward voltage, reverse leakage, or operating temperature range that remain functionally compatible within the specified parameter envelope.

Alternative Package: Parts with identical electrical specifications but housed in SC-70, SOT-323 package (BAT54AW,115) for applications where package footprint alternatives are acceptable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [mA]	Vf (Max) @ 100mA [mV]	trr [ns]	Ir @ 25V [µA]	Tj (Max) [°C]	Package	Product Status
BAT54ALT3G	onsemi	30	200	800	5	2	150	SOT-23-3	Obsolete
BAT54ALT1G	onsemi	30	200	800	5	2	150	SOT-23-3	Active
SBAT54ALT1G	onsemi	30	200	800	5	2	150	SOT-23-3	Active
SBAT54ALT3G	onsemi	30	200	800	5	2	150	SOT-23-3	Active
BAT754A,215	Nexperia USA Inc.	30	200	600	—	2	125	SOT-23-3	Active
BAT54ATA	Diodes Incorporated	30	200	1000	5	4	125	SOT-23-3	Active
BAR43A-TP	Micro Commercial Co	30	200	800	5	0.5	150	SOT-23-3	Active
BAT54A-TP	Micro Commercial Co	30	200	1000	5	2	125	SOT-23-3	Active
BAT54AW,115	Nexperia USA Inc.	30	200	800	5	2	150	SOT-323	Active
BAT5406E6327HTSA1	Infineon Technologies	30	200	800	5	2	150	SOT-23-3	Active
BAT54A,215	Nexperia USA Inc.	30	200	800	5	2	150	SOT-23-3	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

BAT54ALT1G, SBAT54ALT1G, and SBAT54ALT3G from onsemi are direct equivalents with identical electrical specifications and active product status. These parts are manufactured by the original supplier and carry RoHS3 compliance. Selection among these three variants is determined by packaging format requirements (Cut Tape & Digi-Reel® versus Tape & Reel).

BAT5406E6327HTSA1 from Infineon Technologies meets all electrical and mechanical specifications with active product status and RoHS3 compliance. This part is suitable for applications requiring high inventory availability.

BAT54A,215 from Nexperia USA Inc. provides identical electrical performance with active product status, RoHS3 compliance, and automotive-grade qualification (AEC-Q101). This part is recommended for automotive applications.

Secondary Substitutes (Minor Parameter Variations):

BAT754A,215 from Nexperia USA Inc. features a lower forward voltage (600 mV @ 100 mA) compared to the BAT54ALT3G (800 mV @ 100 mA), resulting in reduced power dissipation. This part carries automotive-grade qualification (AEC-Q100) and is suitable for power-sensitive applications. Maximum junction temperature is 125°C.

BAT54ATA from Diodes Incorporated exhibits higher forward voltage (1000 mV @ 100 mA) and reverse leakage current (4 µA @ 25 V) compared to the BAT54ALT3G. This part is active and RoHS3 compliant. Maximum junction temperature is 125°C.

BAR43A-TP from Micro Commercial Co features lower reverse leakage current (500 nA @ 25 V) compared to the BAT54ALT3G (2 µA @ 25 V), providing superior leakage performance. This part is active and maintains the full operating temperature range (-55°C to 150°C).

BAT54A-TP from Micro Commercial Co exhibits higher forward voltage (1000 mV @ 100 mA) and operates at a maximum junction temperature of 125°C. This part is active and RoHS3 compliant.

Alternative Package Substitute:

BAT54AW,115 from Nexperia USA Inc. provides identical electrical specifications to the BAT54ALT3G but is housed in SC-70, SOT-323 package instead of SOT-23-3. This part carries automotive-grade qualification (AEC-Q101) and is suitable for applications where alternative package footprints are acceptable.

Frequently Asked Questions (FAQ)

Q: Can BAT54ALT1G be used as a direct replacement for BAT54ALT3G?

A: Yes. BAT54ALT1G is a direct equivalent with identical electrical specifications (30 V reverse voltage, 200 mA average rectified current, 800 mV forward voltage @ 100 mA, 5 ns reverse recovery time, 2 µA reverse leakage @ 25 V) and the same SOT-23-3 package. The primary difference is product status (active versus obsolete) and packaging format availability.

Q: What is the difference between BAT54ALT1G and SBAT54ALT1G?

A: Both parts are manufactured by onsemi and meet identical electrical specifications. The difference is in the packaging format: BAT54ALT1G is available in Cut Tape & Digi-Reel® format, while SBAT54ALT1G is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Can BAT754A,215 from Nexperia be used instead of BAT54ALT3G?

A: BAT754A,215 is electrically compatible with lower forward voltage (600 mV @ 100 mA versus 800 mV @ 100 mA), which reduces power dissipation. The part meets the same 30 V reverse voltage and 200 mA current specifications. However, the maximum junction temperature is 125°C compared to 150°C for the BAT54ALT3G. This part is suitable for applications where the lower operating temperature limit is acceptable and reduced forward voltage is beneficial.

Q: Is BAT54AW,115 compatible with BAT54ALT3G?

A: BAT54AW,115 is electrically equivalent to BAT54ALT3G with identical electrical specifications. However, it is housed in SC-70, SOT-323 package instead of SOT-23-3. This part is suitable only for applications where the alternative package footprint can be accommodated on the printed circuit board.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Diode configuration (1 Pair Common Anode), (2) Technology (Schottky), (3) Maximum reverse voltage (30 V minimum), (4) Average rectified current (200 mA minimum per diode), (5) Forward voltage (800 mV or lower @ 100 mA for primary substitutes), (6) Reverse recovery time (5 ns or faster), (7) Reverse leakage current (2 µA or lower @ 25 V for primary substitutes), (8) Surface mount mounting type, and (9) SOT-23-3 package or equivalent.

Q: Are all substitute parts RoHS3 compliant?

A: All active substitute parts listed are RoHS3 compliant. The BAT54ALT3G is obsolete and does not carry RoHS3 compliance status.

Q: Which substitute part has the lowest reverse leakage current?

A: BAR43A-TP from Micro Commercial Co features the lowest reverse leakage current at 500 nA @ 25 V, compared to 2 µA @ 25 V for the BAT54ALT3G and most other substitutes.

Q: Which substitute parts carry automotive qualification?

A: BAT754A,215 (Nexperia, AEC-Q100), BAT54AW,115 (Nexperia, AEC-Q101), and BAT54A,215 (Nexperia, AEC-Q101) carry automotive-grade qualifications and are suitable for automotive applications.

Q: What is the difference between BAT54ATA and BAT54ALT3G?

A: BAT54ATA from Diodes Incorporated has higher forward voltage (1000 mV @ 100 mA versus 800 mV @ 100 mA) and higher reverse leakage current (4 µA @ 25 V versus 2 µA @ 25 V). The maximum junction temperature is 125°C compared to 150°C. This part is suitable for applications where the higher forward voltage and leakage specifications are acceptable.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: Primary substitutes (BAT54ALT1G, SBAT54ALT1G, SBAT54ALT3G, BAT5406E6327HTSA1, BAT54A,215) are fully interchangeable with identical electrical specifications. Secondary substitutes with parameter variations (BAT754A,215, BAT54ATA, BAR43A-TP, BAT54A-TP) require circuit analysis to confirm compatibility with the specific application requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message