1SS392,LF Equivalent & Substitute Parts

Part Overview

The 1SS392,LF is a Schottky diode array manufactured by Toshiba Semiconductor and Storage, configured as a 1 Pair Common Cathode device rated for 40 V DC reverse voltage and 100 mA average rectified current per diode. The device is packaged in TO-236-3 (SC-59, SOT-23-3) surface mount format and is RoHS Compliant with unlimited moisture sensitivity level (MSL 1). This part is currently Active in product status with 3704 units in stock.

Equivalent and substitute parts are necessary when the original 1SS392,LF becomes unavailable, when alternative manufacturers are required for supply chain diversification, or when design requirements necessitate enhanced electrical performance within the same package and voltage class.

Substiute Parts

1SS392,LF

Toshiba Semiconductor and StorageIn Stock: 38031SS392,LF Datasheet

Current PartRFQ

BAT6405E6327HTSA1

Infineon TechnologiesIn Stock: 55548BAT6405E6327HTSA1 Datasheet

DirectRFQ

BAS40-05-7-F

Diodes IncorporatedIn Stock: 47424BAS40-05-7-F Datasheet

SimilarRFQ

BAT54CFILM

STMicroelectronicsIn Stock: 29232BAT54CFILM Datasheet

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RB425DT146

Rohm SemiconductorIn Stock: 17173RB425DT146 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1SS392,LF is determined by the following critical parameters:

Mandatory Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 40 V minimum
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount

Performance Parameters (Allowable Variation):

• Current - Average Rectified (Io) (per Diode): Equal to or greater than 100 mA
• Voltage - Forward (Vf) (Max) @ If: Within acceptable circuit design margins
• Operating Temperature - Junction: Equal to or greater than 125°C

All substitute parts listed maintain identical package geometry, diode configuration, and reverse voltage rating. Substitutes are grouped by current rating capability: direct equivalents at 100 mA, and higher-performance alternatives rated at 200 mA, 250 mA, or 300 mA per diode.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Pin-Compatible, Identical Current Rating):

RB425DT146 (Rohm Semiconductor) is a direct equivalent to the 1SS392,LF. Both devices are rated at 100 mA per diode with identical package geometry and voltage specifications. The RB425DT146 is ROHS3 Compliant and maintains the same maximum junction temperature of 125°C. This substitute is suitable for one-to-one replacement in existing designs without circuit modification.

Higher Current Capacity Substitutes (Pin-Compatible, Enhanced Performance):

BAS40-05-7-F (Diodes Incorporated), BAT6405E6327HTSA1 (Infineon Technologies), and BAT54CFILM (STMicroelectronics) are pin-compatible alternatives with current ratings of 200 mA, 250 mA, and 300 mA respectively. These devices maintain the 40 V reverse voltage rating and identical package format. All three are ROHS3 Compliant and Active in product status. BAT6405E6327HTSA1 and BAT54CFILM offer extended maximum junction temperatures of 150°C compared to the 1SS392,LF specification of 125°C. These higher-rated devices are suitable for applications requiring increased current capacity or thermal margin within the same circuit topology.

BAT6405E6327HTSA1 carries AEC-Q101 automotive qualification, making it appropriate for automotive-grade applications where the original 1SS392,LF may not meet qualification requirements.

All substitute parts are currently Active in product status with substantial inventory availability, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the RB425DT146 replace the 1SS392,LF in a direct one-to-one substitution?

A: Yes. The RB425DT146 is a direct equivalent with identical current rating (100 mA per diode), reverse voltage (40 V), package format (TO-236-3, SC-59, SOT-23-3), and diode configuration (1 Pair Common Cathode). No circuit modifications are required.

Q: What is the difference between the 1SS392,LF and the higher-current alternatives?

A: The 1SS392,LF is rated at 100 mA per diode. The BAS40-05-7-F, BAT6405E6327HTSA1, and BAT54CFILM are rated at 200 mA, 250 mA, and 300 mA respectively. All maintain the same 40 V reverse voltage and package geometry. Higher-rated devices provide increased current capacity and thermal margin for applications requiring enhanced performance.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 1SS392,LF is RoHS Compliant. All substitute parts listed are ROHS3 Compliant, meeting current environmental and regulatory standards.

Q: What is the significance of the different forward voltage specifications among the substitutes?

A: Forward voltage (Vf) varies among manufacturers and device ratings. The 1SS392,LF specifies 600 mV @ 100 mA. Substitutes range from 550 mV to 900 mV at comparable or different test currents. Forward voltage affects power dissipation and circuit performance. Circuit designers must verify that forward voltage characteristics are acceptable for their specific application requirements.

Q: Can I use a higher-current-rated device in place of the 1SS392,LF?

A: Yes. Devices rated at 200 mA, 250 mA, or 300 mA per diode are pin-compatible and can be used in applications originally designed for the 100 mA 1SS392,LF. The higher current rating provides additional design margin and does not degrade circuit performance. However, circuit designers must confirm that forward voltage and other electrical characteristics are compatible with their specific application.

Q: What is the difference between the Toshiba 1SS392,LF and the Infineon BAT6405E6327HTSA1?

A: Both are 40 V, 1 Pair Common Cathode Schottky diode arrays in TO-236-3 packaging. The BAT6405E6327HTSA1 is rated at 250 mA per diode (versus 100 mA for the 1SS392,LF), has a maximum junction temperature of 150°C (versus 125°C), and carries AEC-Q101 automotive qualification. The BAT6405E6327HTSA1 is suitable for automotive applications and designs requiring higher current capacity.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are packaged in TO-236-3 (SC-59, SOT-23-3) surface mount format, identical to the 1SS392,LF. Packaging variations exist only in supplier device package designations (SC-59, PG-SOT23, SOT-23-3, SMD3), which refer to the same physical package and are interchangeable on standard PCB layouts.

Q: What is the moisture sensitivity level for these diodes?

A: All parts listed, including the 1SS392,LF and all substitutes, have Moisture Sensitivity Level (MSL) 1, which indicates unlimited shelf life and no special moisture control requirements during storage or handling.