BAT46SFILM Equivalent & Substitute Parts

Part Overview

The BAT46SFILM is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair series connection with a maximum reverse voltage rating of 100 V and average rectified current of 150 mA per diode. The device is packaged in SOT-23-3 (TO-236-3, SC-59) surface mount configuration. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility within the electrical and mechanical constraints of the application.

Substiute Parts

BAT46SFILM

STMicroelectronicsIn Stock: 15470BAT46SFILM Datasheet

Current PartRFQ

BAT46ZFILM

STMicroelectronicsIn Stock: 45262BAT46ZFILM Datasheet

SimilarRFQ

BAS40-04-7-F

Diodes IncorporatedIn Stock: 122487BAS40-04-7-F Datasheet

SimilarRFQ

BAT6804E6327HTSA1

Infineon TechnologiesIn Stock: 5024BAT6804E6327HTSA1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAT46SFILM is determined by the following critical parameters:

Primary Substitution Criteria:

• Diode configuration (1 pair series connection)
• Technology (Schottky)
• Voltage rating (DC reverse voltage ≥ 100 V for direct replacement)
• Current rating (average rectified current ≥ 150 mA per diode)
• Package type (SOT-23-3 surface mount preferred for mechanical compatibility)
• Compliance certifications (RoHS3, REACH Unaffected, MSL 1)

Substitution Categories:

Category 1: Direct Electrical Equivalent (Same Voltage & Current) Parts meeting or exceeding 100 V reverse voltage and 150 mA current ratings with identical diode configuration and package type.

Category 2: Reduced Voltage Rating (Voltage Derating) Parts with reverse voltage ratings below 100 V are suitable only for applications where the actual operating voltage is within the substitute part's rating. These require circuit-level voltage verification.

Category 3: Package Variant (Same Electrical, Different Package) Parts with identical electrical specifications but different surface mount packages (SOD-123 vs. SOT-23-3) require PCB layout modification and are suitable only when mechanical constraints permit package change.

Parameter Comparison

Engineering Selection Recommendations

BAT46ZFILM (STMicroelectronics)

This substitute maintains identical electrical specifications (100 V reverse voltage, 150 mA current, 5 µA reverse leakage) and is manufactured by the same supplier as the obsolete BAT46SFILM. The part is active and in production. The primary difference is packaging: BAT46ZFILM uses SOD-123 surface mount package instead of SOT-23-3. This substitute is suitable for applications where PCB layout can accommodate SOD-123 package dimensions. All compliance certifications (RoHS3, REACH Unaffected, MSL 1) are identical.

BAS40-04-7-F (Diodes Incorporated)

This substitute maintains the SOT-23-3 package and 1 pair series connection configuration, ensuring mechanical compatibility with the original BAT46SFILM footprint. However, the reverse voltage rating is 40 V, which is 60% of the original specification. This part is suitable only for applications where the actual operating reverse voltage does not exceed 40 V. Current rating (200 mA) exceeds the original requirement. The part is active and RoHS3 compliant. Operating temperature maximum is 125°C, compared to 150°C for the original part.

BAT6804E6327HTSA1 (Infineon Technologies)

This substitute maintains the SOT-23-3 package and 1 pair series connection configuration. However, the reverse voltage rating is 8 V, which is 92% below the original specification. This part is not suitable as a general substitute for the BAT46SFILM and is applicable only in applications with very low reverse voltage requirements (≤ 8 V). Current rating (130 mA) is below the original 150 mA specification. The part is active and RoHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can BAT46ZFILM be used as a direct replacement for BAT46SFILM?

A: BAT46ZFILM provides identical electrical performance (100 V, 150 mA, Schottky configuration) and is manufactured by STMicroelectronics. The primary difference is the package type: BAT46ZFILM uses SOD-123 instead of SOT-23-3. Direct PCB footprint replacement is not possible without layout modification. If the application PCB can be redesigned to accommodate SOD-123 package, BAT46ZFILM is electrically equivalent.

Q: Is BAS40-04-7-F suitable for all BAT46SFILM applications?

A: BAS40-04-7-F maintains the SOT-23-3 package and can be used as a direct footprint replacement. However, the 40 V reverse voltage rating is significantly lower than the original 100 V specification. This substitute is suitable only for applications where the actual reverse voltage stress does not exceed 40 V. Circuit analysis is required to confirm voltage compatibility before selection.

Q: What are the compliance differences between substitute parts?

A: All substitute parts (BAT46ZFILM, BAS40-04-7-F, BAT6804E6327HTSA1) maintain RoHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity level, identical to the original BAT46SFILM. No compliance-related restrictions apply to substitution.

Q: Why is BAT6804E6327HTSA1 listed as a substitute if the voltage rating is only 8 V?

A: BAT6804E6327HTSA1 is included in the substitute list based on the provided input parameters. However, the 8 V reverse voltage rating is substantially below the 100 V specification of BAT46SFILM. This part is applicable only in specialized low-voltage applications and is not recommended as a general substitute.

Q: What is the impact of package change from SOT-23-3 to SOD-123?

A: Package change from SOT-23-3 to SOD-123 requires PCB layout modification, including footprint redesign, trace routing adjustment, and potential thermal management changes. SOD-123 is a smaller package than SOT-23-3. Mechanical compatibility with the application assembly process and thermal requirements must be evaluated before selection.

Q: Are there temperature rating differences between substitute parts?

A: BAT46SFILM and BAT46ZFILM both specify 150°C maximum junction temperature. BAS40-04-7-F specifies 125°C maximum junction temperature, which is 25°C lower. Applications operating near the thermal limits of the original part may not be compatible with BAS40-04-7-F. BAT6804E6327HTSA1 specifies 150°C maximum junction temperature.