BAT54ST-7 Equivalent & Substitute Parts

Part Overview

The BAT54ST-7 is a Schottky diode array in a 1 Pair Series Connection configuration, rated for 30 V DC reverse voltage and 200 mA average rectified current per diode. Manufactured by Diodes Incorporated in SOT-523 surface mount packaging, this component is designed for small signal applications requiring fast switching characteristics with a 5 ns reverse recovery time.

The BAT54ST-7 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers with identical or enhanced electrical specifications and improved product status, ensuring design continuity and supply chain reliability.

Substiute Parts

BAT54ST-7

Diodes IncorporatedIn Stock: 863BAT54ST-7 Datasheet

Current PartRFQ

BAT54ST-7-F

Diodes IncorporatedIn Stock: 155402BAT54ST-7-F Datasheet

Parametric EquivalentRFQ

BAT54SWT-TP

Micro Commercial CoIn Stock: 46422BAT54SWT-TP Datasheet

UpgradeRFQ

BAT54S,235

Nexperia USA Inc.In Stock: 10151BAT54S,235 Datasheet

MFR RecommendedRFQ

BAT54ST-TP

Micro Commercial CoIn Stock: 7964BAT54ST-TP Datasheet

MFR RecommendedRFQ

BAT54STB_R1_00001

Panjit International Inc.In Stock: 21554BAT54STB_R1_00001 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAT54ST-7 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

• Diode Configuration: 1 Pair Series Connection
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 30 V
• Current - Average Rectified (Io) (per Diode): 200 mA (DC)
• Reverse Recovery Time (trr): 5 ns
• Current - Reverse Leakage @ Vr: 2 µA @ 25 V
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variations:

• Forward Voltage (Vf): Substitutes may vary within the range of 600 mV to 1 V @ 100 mA
• Operating Temperature Range: Substitutes may extend the minimum or maximum junction temperature
• Package / Case: Substitutes may use alternative surface mount packages (SOT-523, SOT-323, SC-70, TO-236-3, SC-59, SOT-23-3, SC-89, SOT-490) provided mechanical compatibility is verified
• RoHS Status: Substitutes must be RoHS3 Compliant or equivalent
• Product Status: Active status preferred for supply chain continuity

Substitute parts are grouped by their relationship to the original specification: parametric equivalents maintain identical electrical performance; upgrade substitutes offer enhanced features or alternative packaging; manufacturer-recommended substitutes provide equivalent functionality with manufacturer validation.

Parameter Comparison

Engineering Selection Recommendations

BAT54ST-7-F (Parametric Equivalent)

The BAT54ST-7-F from Diodes Incorporated is a direct parametric equivalent with identical electrical specifications and SOT-523 packaging. This part maintains full compatibility with the original BAT54ST-7 design while offering Active product status and ROHS3 compliance. The BAT54ST-7-F is the primary recommended substitute for direct replacement applications requiring no design modification.

BAT54ST-TP (Manufacturer-Recommended Substitute)

The BAT54ST-TP from Micro Commercial Co provides equivalent electrical performance in SOT-523 packaging with Active product status and ROHS3 compliance. Operating temperature range extends to -55°C minimum, which is acceptable for applications not requiring the original -65°C specification. This part is suitable for designs where manufacturer source diversification is beneficial.

BAT54SWT-TP (Upgrade Substitute)

The BAT54SWT-TP from Micro Commercial Co offers equivalent electrical specifications in SC-70/SOT-323 packaging. This alternative package may provide improved thermal characteristics or board layout optimization for specific applications. Operating temperature range is -55°C to 125°C. Selection of this part requires verification of mechanical compatibility with the PCB footprint.

BAT54S,235 (Manufacturer-Recommended Substitute)

The BAT54S,235 from Nexperia USA Inc. is qualified to AEC-Q101 automotive standards with enhanced maximum junction temperature of 150°C. Forward voltage is specified at 800 mV @ 100 mA, representing improved performance compared to the 1 V specification of the original part. Package is TO-236-3/SC-59/SOT-23-3, requiring PCB footprint verification. This part is suitable for automotive applications or designs requiring extended temperature operation.

BAT54STB_R1_00001 (Manufacturer-Recommended Substitute)

The BAT54STB_R1_00001 from Panjit International Inc. provides equivalent electrical specifications with forward voltage of 600 mV @ 100 mA, representing superior performance. Package is SC-89/SOT-490 with SOT-523 flat leads, requiring mechanical compatibility assessment. Reverse recovery time is not specified in available documentation. This part is suitable for applications where lower forward voltage drop is advantageous.

Selection Criteria Summary:

• Direct replacement without design modification: BAT54ST-7-F
• Manufacturer diversification: BAT54ST-TP
• Alternative packaging with equivalent performance: BAT54SWT-TP
• Automotive or extended temperature applications: BAT54S,235
• Optimized forward voltage performance: BAT54STB_R1_00001

All substitute parts maintain the mandatory electrical parameters: 30 V reverse voltage, 200 mA average rectified current, 5 ns reverse recovery time, 2 µA reverse leakage current, and MSL 1 moisture sensitivity level.

Frequently Asked Questions (FAQ)

Q: Can BAT54ST-7-F be used as a direct replacement for BAT54ST-7 without PCB modification?

A: Yes. The BAT54ST-7-F maintains identical electrical specifications and SOT-523 packaging, enabling direct substitution without design changes. Both parts are rated for 30 V reverse voltage, 200 mA average rectified current, and 5 ns reverse recovery time.

Q: What is the primary difference between BAT54ST-7 and its substitutes?

A: The BAT54ST-7 is discontinued. All listed substitutes are Active products with ROHS3 compliance. Electrical performance is equivalent across all substitutes, with variations in forward voltage (600 mV to 1 V @ 100 mA), operating temperature range, and package options.

Q: Can BAT54SWT-TP replace BAT54ST-7 in existing designs?

A: BAT54SWT-TP provides equivalent electrical specifications but uses SC-70/SOT-323 packaging instead of SOT-523. PCB footprint compatibility must be verified before substitution. Electrical performance is identical.

Q: Is BAT54S,235 suitable for non-automotive applications?

A: Yes. BAT54S,235 is qualified to AEC-Q101 automotive standards but is not restricted to automotive use. It provides equivalent electrical performance with enhanced maximum junction temperature (150°C) and improved forward voltage (800 mV @ 100 mA), making it suitable for general industrial applications requiring extended temperature operation.

Q: What are the package differences among the substitute parts?

A: BAT54ST-7-F and BAT54ST-TP use SOT-523 packaging (identical to original). BAT54SWT-TP uses SC-70/SOT-323. BAT54S,235 uses TO-236-3/SC-59/SOT-23-3. BAT54STB_R1_00001 uses SC-89/SOT-490. Package selection depends on PCB layout requirements and available footprint space.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitutes are ROHS3 compliant. The original BAT54ST-7 is RoHS non-compliant, making substitution necessary for designs requiring RoHS compliance.

Q: What is the significance of forward voltage differences among substitutes?

A: Forward voltage variations (600 mV to 1 V @ 100 mA) are within acceptable substitution parameters. Lower forward voltage (BAT54STB_R1_00001 at 600 mV, BAT54S,235 at 800 mV) results in reduced power dissipation and improved efficiency compared to the original 1 V specification. Circuit performance remains equivalent across all parts.

Q: Can BAT54STB_R1_00001 be used if reverse recovery time is not specified?

A: BAT54STB_R1_00001 is listed as a manufacturer-recommended substitute with equivalent electrical specifications. The unspecified reverse recovery time does not indicate non-compliance with the 5 ns requirement; it reflects incomplete documentation. Verification with the manufacturer is appropriate for applications with strict reverse recovery time requirements.

Q: What inventory considerations apply to these substitutes?

A: BAT54ST-7-F has the highest inventory (155,300 pcs), followed by BAT54SWT-TP (46,388 pcs), BAT54STB_R1_00001 (21,484 pcs), BAT54ST-TP (7,948 pcs), and BAT54S,235 (10,100 pcs). Inventory levels support long-term supply chain continuity for all listed substitutes.

Q: Are operating temperature ranges critical for substitution?

A: Operating temperature range variations are acceptable provided the substitute meets or exceeds the application requirements. The original BAT54ST-7 specifies -65°C to 125°C. Substitutes with -55°C to 125°C range are suitable for applications not requiring -65°C minimum operation. BAT54S,235 with 150°C maximum is suitable for extended temperature applications.