BAS70-08SFILM Equivalent & Substitute Parts

Part Overview

The BAS70-08SFILM is a Schottky diode array manufactured by STMicroelectronics, featuring three independent diodes rated for 70 V DC reverse voltage and 70 mA average rectified current per diode. The device is packaged in a 6-TSSOP (SC-88, SOT-363) surface mount configuration. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating the same physical package footprint.

Substiute Parts

BAS70-08SFILM

STMicroelectronicsIn Stock: 10277BAS70-08SFILM Datasheet

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BAS40TW-7-F

Diodes IncorporatedIn Stock: 9293BAS40TW-7-F Datasheet

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BAS70TW-7-F

Diodes IncorporatedIn Stock: 3555BAS70TW-7-F Datasheet

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BAS70TW-TP

Micro Commercial CoIn Stock: 58184BAS70TW-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS70-08SFILM is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Diode configuration must be 3 independent diodes
• Technology must be Schottky
• Voltage - DC Reverse (Vr) rating must be equal to or greater than 70 V
• Current - Average Rectified (Io) per diode must be equal to or greater than 70 mA
• Forward voltage (Vf) characteristics must be compatible at specified test conditions
• Reverse leakage current must not exceed application limits

Physical Compatibility Requirements:

• Package / Case must be 6-TSSOP, SC-88, or SOT-363
• Mounting type must be Surface Mount
• Supplier device package must accommodate the same PCB footprint

Compliance Requirements:

• RoHS3 compliance required
• Moisture Sensitivity Level (MSL) of 1 (Unlimited) acceptable

Substitute parts are grouped into two categories based on voltage rating alignment: direct equivalents matching 70 V specifications, and lower-voltage alternatives suitable for applications with reduced voltage requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (70 V Rating):

The BAS70TW-TP (Micro Commercial Co) and BAS70TW-7-F (Diodes Incorporated) are direct electrical and mechanical equivalents to the BAS70-08SFILM. Both parts maintain identical voltage and current specifications, share the same package footprint, and are classified as active products with full RoHS3 compliance. The BAS70TW-TP offers the highest inventory availability (58,136 pcs) among active alternatives. Both parts feature improved reverse leakage characteristics (100 nA @ 50 V versus 10 µA @ 70 V) and extended operating temperature ranges (-55°C to 125°C), providing enhanced performance margins in production environments.

Alternative with Reduced Voltage Rating:

The BAS40TW-7-F (Diodes Incorporated) is a lower-voltage alternative rated for 40 V DC reverse voltage. This part is suitable only for applications where the circuit design operates at voltages not exceeding 40 V. The BAS40TW-7-F provides higher current capacity (200 mA per diode versus 70 mA) and is classified as an active product with full compliance certifications. This option is appropriate for cost optimization in voltage-constrained applications.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, ensuring regulatory alignment with the original component. Selection should prioritize active product status for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can BAS70TW-TP or BAS70TW-7-F be used as direct replacements for BAS70-08SFILM?

A: Yes. Both parts are direct electrical and mechanical equivalents. They maintain identical voltage (70 V), current (70 mA per diode), and forward voltage specifications. All three parts use the 6-TSSOP, SC-88, SOT-363 package with identical pinouts and PCB footprints. Both substitute parts are active products with full RoHS3 compliance.

Q: What is the difference between BAS70TW-TP and BAS70TW-7-F?

A: Both parts are electrically identical with 70 V reverse voltage and 70 mA current ratings. The primary differences are manufacturer (Micro Commercial Co versus Diodes Incorporated) and inventory availability. BAS70TW-TP has significantly higher stock (58,136 pcs versus 3,540 pcs). Both feature identical reverse leakage characteristics and operating temperature ranges.

Q: Can BAS40TW-7-F replace BAS70-08SFILM in all applications?

A: No. BAS40TW-7-F is rated for 40 V DC reverse voltage, which is lower than the 70 V specification of BAS70-08SFILM. This part is suitable only for circuits designed to operate at voltages not exceeding 40 V. Using BAS40TW-7-F in a 70 V application will result in component failure. However, BAS40TW-7-F offers higher current capacity (200 mA per diode) and is appropriate for voltage-constrained designs requiring increased current handling.

Q: Are there package compatibility concerns when substituting these parts?

A: No. All substitute parts use the 6-TSSOP, SC-88, SOT-363 package designation with identical surface mount footprints. PCB layouts and reflow profiles require no modification. Supplier device packages (SOT-323-6L for the main part, SOT-363 for substitutes) are mechanically compatible.

Q: What are the reverse leakage differences between the main part and substitutes?

A: The BAS70-08SFILM specifies 10 µA @ 70 V reverse leakage. Both BAS70TW-TP and BAS70TW-7-F specify 100 nA @ 50 V, representing significantly lower leakage. BAS40TW-7-F specifies 200 nA @ 30 V. Lower reverse leakage in substitute parts indicates improved performance characteristics and reduced power dissipation in standby conditions.

Q: What is the operating temperature range difference?

A: BAS70-08SFILM specifies a maximum junction temperature of 150°C without a minimum rating. BAS70TW-TP and BAS70TW-7-F specify -55°C to 125°C operating range, and BAS40TW-7-F specifies the same range. The substitute parts provide defined operating windows suitable for industrial and commercial temperature environments. Applications requiring operation above 125°C require verification against the original BAS70-08SFILM specifications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. BAS70TW-TP, BAS70TW-7-F, and BAS40TW-7-F are all ROHS3 compliant with MSL Level 1 (Unlimited) and REACH Unaffected status, matching the compliance profile of BAS70-08SFILM.