BAT54STQ-7-F Equivalent & Substitute Parts

Part Overview

The BAT54STQ-7-F is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair series connection rated for 30 V DC reverse voltage and 200 mA average rectified current per diode. The device is housed in a SOT-523 surface mount package and is classified as Active product status. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when design requirements necessitate alternative qualified sources.

Substiute Parts

BAT54STQ-7-F

Diodes IncorporatedIn Stock: 3337BAT54STQ-7-F Datasheet

Current PartRFQ

BAT54STB-AU_R1_000A1

Panjit International Inc.In Stock: 4264BAT54STB-AU_R1_000A1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAT54STQ-7-F is permissible with parts that maintain electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Diode configuration: 1 Pair Series Connection
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 30 V or greater
• Current - Average Rectified (Io) (per Diode): 200 mA or greater
• Speed classification: Small Signal ≤ 200mA (Io), Any Speed
• Operating temperature range: Must encompass or exceed -65°C ~ 150°C

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount
• Package / Case: SOT-523 or equivalent footprint designation
• Moisture Sensitivity Level: 1 (Unlimited)

Compliance Criteria:

• RoHS3 Compliant
• REACH Unaffected status

The BAT54STB-AU_R1_000A1 manufactured by Panjit International Inc. satisfies all electrical and mechanical compatibility requirements and is qualified as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: BAT54STQ-7-F (Diodes Incorporated)

Selection is appropriate for applications requiring the full operating temperature range of -65°C ~ 150°C. This part maintains Active product status with established supply availability (3234 pcs in stock). RoHS3 compliance and REACH unaffected status confirm regulatory alignment for commercial and industrial applications.

Substitute Part: BAT54STB-AU_R1_000A1 (Panjit International Inc.)

This part is qualified as a direct electrical and mechanical substitute. The substitute demonstrates superior forward voltage performance (600 mV @ 100 mA versus 1 V @ 100 mA), resulting in reduced power dissipation in applications operating at 100 mA forward current. The operating temperature range (-55°C ~ 125°C) is narrower than the primary part and must be verified against application requirements. The substitute carries AEC-Q101 automotive qualification, indicating suitability for automotive-grade applications. RoHS3 compliance and REACH unaffected status are maintained. Supply availability is confirmed (4222 pcs in stock).

Selection of the substitute part is appropriate when:

• Application operating temperature range does not exceed -55°C to 125°C
• Automotive-grade qualification is required or beneficial
• Reduced forward voltage dissipation is advantageous
• Primary part availability is constrained

Frequently Asked Questions (FAQ)

Q: Can BAT54STB-AU_R1_000A1 be used as a direct replacement for BAT54STQ-7-F in all applications?

A: The BAT54STB-AU_R1_000A1 is electrically and mechanically compatible with the BAT54STQ-7-F for applications operating within the temperature range of -55°C ~ 125°C. Applications requiring operation below -55°C or above 125°C must retain the primary part BAT54STQ-7-F to ensure specified performance.

Q: What is the difference in forward voltage between these parts?

A: The BAT54STQ-7-F specifies a maximum forward voltage of 1 V @ 100 mA, while the BAT54STB-AU_R1_000A1 specifies 600 mV @ 100 mA. The substitute part exhibits lower forward voltage, resulting in reduced power dissipation and improved efficiency in circuits operating at 100 mA forward current.

Q: Are both parts RoHS3 compliant?

A: Yes, both BAT54STQ-7-F and BAT54STB-AU_R1_000A1 are RoHS3 compliant and REACH unaffected, confirming regulatory compliance for commercial and industrial applications.

Q: What is the significance of AEC-Q101 qualification on the substitute part?

A: AEC-Q101 is an automotive industry qualification standard. The BAT54STB-AU_R1_000A1 carries this qualification, indicating the part has been validated for automotive-grade reliability and performance requirements. This qualification is beneficial for applications requiring automotive-level quality assurance but is not mandatory for non-automotive applications.

Q: Are the package designations SOT-523 and SC-89/SOT-490 interchangeable?

A: SOT-523 and SC-89/SOT-490 are equivalent footprint designations for the same physical package. Both designations refer to the same surface mount package geometry and pin configuration, ensuring mechanical and electrical compatibility on the printed circuit board.

Q: What is the moisture sensitivity level (MSL) and why is it important?

A: Both parts carry MSL 1 (Unlimited), indicating unlimited shelf life without moisture absorption concerns. This classification eliminates the need for moisture-controlled storage or baking procedures prior to assembly, simplifying component handling and storage requirements.

Q: Can the substitute part be used in automotive applications?

A: Yes, the BAT54STB-AU_R1_000A1 carries AEC-Q101 automotive qualification and is suitable for automotive applications. The primary part BAT54STQ-7-F does not carry automotive qualification but may be used in non-automotive applications.