BAT41SWFILM Equivalent & Substitute Parts

Part Overview

The BAT41SWFILM 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 200 mA per diode. The device is packaged in SC-70, SOT-323 surface mount configuration and is classified as obsolete product status.

Due to the obsolete status of the BAT41SWFILM, identification of equivalent and substitute parts is necessary to maintain design continuity and ensure procurement availability. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, forward voltage characteristics, and reverse leakage specifications while accommodating packaging and configuration differences.

Substiute Parts

BAT41SWFILM

STMicroelectronicsIn Stock: 2790BAT41SWFILM Datasheet

Current PartRFQ

BAT41KFILM

STMicroelectronicsIn Stock: 125236BAT41KFILM Datasheet

SimilarRFQ

BAS40-04-7-F

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAT41SWFILM is determined by alignment of the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Technology classification (Schottky diode)
• Diode configuration (1 pair series connection)
• Maximum reverse voltage rating (100 V minimum)
• Average rectified current per diode (200 mA minimum)
• Forward voltage characteristics (1 V @ 200 mA maximum)
• Reverse leakage current specifications (100 nA @ 50 V maximum)
• Operating temperature range (150°C maximum junction temperature)

Mechanical Compatibility Criteria:

• Surface mount mounting type
• Package footprint compatibility (SC-70, SOT-323 or equivalent)
• Compliance certifications (RoHS3, REACH Unaffected)
• Moisture sensitivity level (MSL 1 or better)

Substitute parts are grouped based on whether they meet all electrical parameters while accommodating package variations. Parts that maintain the same electrical specifications but differ in packaging configuration are classified as direct functional equivalents.

Parameter Comparison

Engineering Selection Recommendations

BAT41KFILM (STMicroelectronics)

The BAT41KFILM is an active product offering identical electrical specifications to the BAT41SWFILM across all critical parameters: 100 V reverse voltage rating, 200 mA average rectified current, 1 V forward voltage at 200 mA, and 100 nA reverse leakage current at 50 V. Both devices maintain 150°C maximum junction temperature and are ROHS3 compliant with MSL 1 rating. The primary difference is packaging: BAT41KFILM uses SC-79, SOD-523 surface mount package versus the SC-70, SOT-323 package of the main part. This substitute is suitable for applications where PCB layout can accommodate the SOD-523 footprint. Inventory availability is significantly higher (125,200 pcs) compared to the obsolete main part.

BAS40-04-7-F (Diodes Incorporated)

The BAS40-04-7-F maintains the same diode configuration (1 pair series connection) and current rating (200 mA) as the BAT41SWFILM. However, this part has a reduced maximum reverse voltage rating of 40 V compared to the 100 V specification of the main part. The forward voltage specification differs at 1 V @ 40 mA versus 1 V @ 200 mA. Reverse leakage current is higher at 200 nA @ 30 V. Operating temperature maximum is 125°C versus 150°C. This substitute is applicable only in applications where the circuit operates at 40 V or lower reverse voltage and does not require the full thermal performance of the main part. The BAS40-04-7-F uses SOT-23-3 packaging. This part is active with high inventory availability (122,400 pcs).

Frequently Asked Questions (FAQ)

Q: Can BAT41KFILM directly replace BAT41SWFILM in existing PCB designs?

A: BAT41KFILM provides electrical equivalence but uses a different surface mount package (SOD-523 versus SOT-323). Direct PCB replacement requires footprint compatibility verification. If the existing PCB layout accommodates SOD-523 package dimensions and pin spacing, substitution is electrically valid. PCB redesign may be necessary if the current footprint is SOT-323 specific.

Q: What are the voltage limitations when using BAS40-04-7-F as a substitute?

A: BAS40-04-7-F has a maximum reverse voltage rating of 40 V. This part is suitable only for circuits operating at 40 V or lower. Applications requiring the full 100 V reverse voltage capability of BAT41SWFILM cannot use BAS40-04-7-F without circuit redesign to reduce operating voltage.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both BAT41KFILM and BAS40-04-7-F are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of the main part BAT41SWFILM.

Q: What is the significance of the diode configuration difference between BAT41KFILM and the main part?

A: BAT41SWFILM is configured as 1 pair series connection (two diodes in series within a single package), while BAT41KFILM is a single diode. The electrical performance per diode is identical, but circuit integration differs. Applications requiring the series pair configuration must account for this structural difference in circuit design.

Q: How do operating temperature ranges compare across the substitute options?

A: BAT41SWFILM and BAT41KFILM both specify 150°C maximum junction temperature. BAS40-04-7-F specifies 125°C maximum junction temperature. Applications requiring operation near or above 125°C must use BAT41KFILM or the main part to ensure thermal compliance.

Q: What packaging considerations apply when selecting between substitute parts?

A: BAT41SWFILM uses SC-70, SOT-323 package. BAT41KFILM uses SC-79, SOD-523 package. BAS40-04-7-F uses TO-236-3, SC-59, SOT-23-3 package. Each package has distinct footprint, pin spacing, and land pattern requirements. PCB layout compatibility must be verified before substitution.