BAT54STC Equivalent & Substitute Parts

Part Overview

The BAT54STC is a Schottky diode array in a 1 Pair Series Connection configuration manufactured by Diodes Incorporated. This component is rated for 30 V DC reverse voltage and 200 mA average rectified current per diode, housed in a SOT-23-3 surface mount package. The BAT54STC is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Series Connection
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io) (per Diode)	200 mA (DC)
Voltage - Forward (Vf) (Max) @ If	1 V @ 100 mA
Reverse Recovery Time (trr)	5 ns
Current - Reverse Leakage @ Vr	4 µA @ 25 V
Operating Temperature - Junction (Max)	125°C
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the BAT54STC is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

Diode Configuration: 1 Pair Series Connection
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 30 V minimum
Current - Average Rectified (Io) (per Diode): 200 mA minimum
Package / Case: TO-236-3, SC-59, SOT-23-3 (or equivalent surface mount SOT-23 variants)
Mounting Type: Surface Mount

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents – Parts with identical electrical specifications and the same package footprint. These parts are direct functional replacements with no design modifications required.

Category 2: Direct Manufacturer Substitutes – Parts from alternative manufacturers that meet or exceed the BAT54STC electrical specifications while maintaining package compatibility. These parts may have enhanced performance characteristics (higher voltage rating, higher current rating, or improved temperature range) but remain functionally compatible within the BAT54STC application envelope.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Vr (Max)	Io (per Diode)	Vf (Max) @ If	trr	Ir @ Vr	Tj (Max)	Package
BAT54STC	Diodes Incorporated	Obsolete	30 V	200 mA	1 V @ 100 mA	5 ns	4 µA @ 25 V	125°C	SOT-23-3
BAT54STA	Diodes Incorporated	Active	30 V	200 mA	1 V @ 100 mA	5 ns	4 µA @ 25 V	125°C	SOT-23-3
BAR43S-TP	Micro Commercial Co	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	500 nA @ 25 V	150°C	SOT-23
BAT5404E6327HTSA1	Infineon Technologies	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	150°C	SOT-23-3
BAT54-E3-18	Vishay General Semiconductor - Diodes Division	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	125°C	SOT-23-3
BAT54-G3-08	Vishay General Semiconductor - Diodes Division	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	125°C	SOT-23-3
BAT54-HE3-18	Vishay General Semiconductor - Diodes Division	Last Time Buy	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	125°C	SOT-23-3
BAT5404WH6327XTSA1	Infineon Technologies	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	150°C	SOT-323
BAT54S,235	Nexperia USA Inc.	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	150°C	SOT-23-3
BAT54SFILM	STMicroelectronics	Active	40 V	300 mA	900 mV @ 100 mA	5 ns	1 µA @ 30 V	150°C	SOT-23-3
BAT54SLT1G	onsemi	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	125°C	SOT-23-3

Engineering Selection Recommendations

Primary Recommendation: BAT54STA

The BAT54STA from Diodes Incorporated is the parametric equivalent of the BAT54STC. This part maintains identical electrical specifications and package configuration while offering active product status. The BAT54STA is available in Cut Tape and Digi-Reel packaging with 18,980 units in stock, providing immediate procurement availability.

Secondary Recommendations: Vishay BAT54 Series

The BAT54-E3-18, BAT54-G3-08, and BAT54-HE3-18 from Vishay General Semiconductor - Diodes Division are functionally compatible alternatives. These parts meet the BAT54STC electrical requirements and are available in active or Last Time Buy status. The BAT54-HE3-18 carries AEC-Q101 automotive qualification and is designated as Last Time Buy, making it suitable for applications requiring automotive-grade components but requiring expedited procurement planning.

Alternative Recommendations: Enhanced Performance Substitutes

The BAT54SLT1G from onsemi, BAT54S,235 from Nexperia USA Inc., and BAT5404E6327HTSA1 from Infineon Technologies provide active alternatives with enhanced specifications. These parts maintain the 30 V / 200 mA core ratings while offering improved reverse leakage characteristics (2 µA versus 4 µA) and extended operating temperature ranges (150°C versus 125°C). The BAT54SLT1G offers the highest inventory availability at 410,200 units.

Higher Performance Option: BAT54SFILM

The BAT54SFILM from STMicroelectronics exceeds the BAT54STC specifications with 40 V reverse voltage rating and 300 mA current rating. This part is suitable for applications requiring enhanced voltage or current margins. The BAT54SFILM is available in active status with 91,070 units in stock.

Package Variant: BAT5404WH6327XTSA1

The BAT5404WH6327XTSA1 from Infineon Technologies provides equivalent electrical performance in a smaller SOT-323 (SC-70) package. This variant is applicable only to designs where the reduced footprint is compatible with the PCB layout.

Not Recommended: BAR43S-TP

While the BAR43S-TP from Micro Commercial Co meets the electrical requirements, it is supplied in bulk packaging only, which may not align with standard procurement workflows. This part should be considered only when bulk quantities are required.

Frequently Asked Questions (FAQ)

Q: Can the BAT54STA directly replace the BAT54STC without design modifications?

A: Yes. The BAT54STA is a parametric equivalent with identical electrical specifications (30 V, 200 mA, 1 V forward voltage at 100 mA) and the same SOT-23-3 package footprint. No circuit modifications are required.

Q: What is the difference between the BAT54STC and BAT54SLT1G?

A: Both parts meet the 30 V / 200 mA core specifications and share the same SOT-23-3 package. The BAT54SLT1G offers improved reverse leakage (2 µA versus 4 µA at 25 V) and an extended operating temperature range (125°C maximum versus 125°C maximum). The BAT54SLT1G is in active production with significantly higher inventory availability.

Q: Is the BAT54SFILM a suitable replacement for the BAT54STC?

A: The BAT54SFILM is functionally compatible but provides enhanced specifications: 40 V reverse voltage (versus 30 V) and 300 mA current rating (versus 200 mA). It is suitable for applications where higher voltage or current margins are beneficial. The forward voltage is slightly higher at 900 mV versus 1 V, which may affect circuit performance in sensitive applications.

Q: What is the significance of the SOT-323 package variant (BAT5404WH6327XTSA1)?

A: The SOT-323 package is physically smaller than the SOT-23-3 package. The BAT5404WH6327XTSA1 is suitable only for designs where the reduced footprint is compatible with the PCB layout. Existing designs using SOT-23-3 footprints cannot accommodate this variant without PCB redesign.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the compliance status of the BAT54STC.

Q: Which substitute part offers the best inventory availability?

A: The BAT54SLT1G from onsemi offers the highest inventory availability at 410,200 units in stock, followed by the BAT54-G3-08 from Vishay at 27,102 units.

Q: Can the BAT54-HE3-18 be used in automotive applications?

A: Yes. The BAT54-HE3-18 carries AEC-Q101 automotive qualification and is suitable for automotive-grade applications. However, this part is designated as Last Time Buy, requiring expedited procurement planning for long-term supply assurance.

Q: What is the primary advantage of the Infineon BAT5404E6327HTSA1 over the BAT54STC?

A: The BAT5404E6327HTSA1 offers improved reverse leakage characteristics (2 µA versus 4 µA at 25 V) and an extended operating temperature range (150°C versus 125°C maximum). These enhancements provide better performance in high-temperature or low-leakage-sensitive applications.

Q: Is the BAR43S-TP packaging suitable for standard procurement workflows?

A: The BAR43S-TP is supplied in bulk packaging only, which may not align with standard tape-and-reel or cut-tape procurement workflows. This part should be considered only when bulk quantities are required and packaging format is acceptable.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message