BAS70WFILM Equivalent & Substitute Parts

Part Overview

The BAS70WFILM is a Schottky diode manufactured by STMicroelectronics, rated for 70V DC reverse voltage and 70mA average rectified current in a surface mount SC-70/SOT-323 package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within acceptable parameter ranges for this diode category.

Substiute Parts

BAS70WFILM

STMicroelectronicsIn Stock: 111279BAS70WFILM Datasheet

Current PartRFQ

BAS70W-04-7-F

Diodes IncorporatedIn Stock: 9265BAS70W-04-7-F Datasheet

DirectRFQ

BAS70W-7-F

Diodes IncorporatedIn Stock: 19560BAS70W-7-F Datasheet

SimilarRFQ

MMBD770T1G

onsemiIn Stock: 12112MMBD770T1G Datasheet

SimilarRFQ

BAS70W,115

Nexperia USA Inc.In Stock: 16107BAS70W,115 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS70WFILM is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 70V
• Current - Average Rectified (Io): Must equal or exceed 70mA
• Voltage - Forward (Vf) (Max) @ If: Must not exceed 1V @ 15mA
• Technology: Schottky diode type

Mechanical Compatibility Requirements:

• Package / Case: SC-70 or SOT-323
• Mounting Type: Surface Mount

Compliance Requirements:

• RoHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are classified into two categories: direct manufacturer equivalents (identical specifications from alternative suppliers) and similar parts (meeting or exceeding all critical electrical and mechanical parameters while maintaining functional compatibility).

Parameter Comparison

Engineering Selection Recommendations

BAS70W-7-F (Diodes Incorporated) and BAS70W,115 (Nexperia USA Inc.) are direct parametric equivalents to the BAS70WFILM. Both parts maintain identical electrical specifications including 70V reverse voltage, 70mA average rectified current, 1V forward voltage at 15mA, and 2pF capacitance. Both are active products with RoHS3 compliance and MSL 1 rating. These parts are suitable for direct substitution in applications requiring the original BAS70WFILM specifications.

BAS70W-04-7-F (Diodes Incorporated) is a 1 Pair Series Connection diode array in the same SC-70/SOT-323 package. This part meets the core electrical requirements with 70V reverse voltage and 70mA per diode current rating. The series connection configuration requires circuit-level evaluation to confirm compatibility with the intended application topology.

MMBD770T1G (onsemi) exceeds the current rating of the original part at 200mA maximum current and features lower capacitance (1pF @ 20V, 1MHz). This part is suitable for applications where higher current capability is beneficial or where lower capacitance is required. The operating temperature range differs (-55°C ~ 125°C versus 150°C maximum junction temperature), which may impact thermal design considerations in high-temperature environments.

All substitute parts are active products with current manufacturing status, ensuring long-term availability and supply chain continuity compared to the obsolete BAS70WFILM.

Frequently Asked Questions (FAQ)

Q: Can BAS70W-7-F directly replace BAS70WFILM in existing designs?

A: Yes. BAS70W-7-F from Diodes Incorporated maintains identical electrical specifications including 70V reverse voltage, 70mA average rectified current, 1V forward voltage at 15mA, and 2pF capacitance. Both use the SC-70/SOT-323 package with surface mount configuration. No circuit modifications are required.

Q: What is the difference between BAS70W-7-F and BAS70W-04-7-F?

A: BAS70W-7-F is a single Schottky diode. BAS70W-04-7-F is a 1 Pair Series Connection diode array, meaning two diodes are internally connected in series within the same package. Both meet the 70V/70mA specifications, but the series configuration of BAS70W-04-7-F requires verification of circuit compatibility before substitution.

Q: Is MMBD770T1G suitable as a substitute for BAS70WFILM?

A: MMBD770T1G meets the core requirements of 70V reverse voltage and exceeds the current rating at 200mA. The part is compatible from a package and mounting perspective (SC-70/SOT-323, surface mount). However, the operating temperature range is -55°C ~ 125°C compared to the original 150°C maximum junction temperature. Applications operating above 125°C junction temperature require the original specification or BAS70W-7-F/BAS70W,115.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. BAS70W-7-F, BAS70W-04-7-F, BAS70W,115, and MMBD770T1G are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original BAS70WFILM compliance status.

Q: What is the difference in reverse leakage current between substitute parts?

A: BAS70WFILM and BAS70W,115 specify 10µA @ 70V reverse leakage. BAS70W-7-F and BAS70W-04-7-F specify 100nA @ 50V, which represents lower leakage current. MMBD770T1G does not specify reverse leakage current in the provided data. Lower leakage current may benefit precision analog circuits or low-power applications.

Q: Can these parts be used interchangeably in high-frequency applications?

A: All parts are classified as Small Signal diodes (≤200mA Io, Any Speed). Reverse recovery time is specified for BAS70W-7-F and BAS70W-04-7-F at 5ns. Capacitance values range from 1pF to 2pF, which affects high-frequency performance. Circuit-level evaluation is required to confirm suitability for specific frequency requirements.

Q: What inventory availability exists for these substitute parts?

A: BAS70W-7-F has 19,521 pieces in stock. BAS70W-04-7-F has 9,200 pieces in stock. BAS70W,115 has 16,051 pieces in stock. MMBD770T1G has 12,100 pieces in stock. All parts are available as new original stock from active manufacturers.