Equivalent & Substitute Parts for 1SS388(TL3,F,D) Schottky Diode

Part Overview

The 1SS388(TL3,F,D) is a Schottky diode manufactured by Toshiba Semiconductor and Storage, rated for 45 V DC reverse voltage and 100 mA average rectified current in a surface mount ESC package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. Substitute parts must maintain functional compatibility within the electrical and mechanical constraints of the original specification.

Substiute Parts

1SS388(TL3,F,D)

Toshiba Semiconductor and StorageIn Stock: 79701SS388(TL3,F,D) Datasheet

Current PartRFQ

CES388,L3F

Toshiba Semiconductor and StorageIn Stock: 5248CES388,L3F Datasheet

DirectRFQ

PMEG4002EB,115

Nexperia USA Inc.In Stock: 2227PMEG4002EB,115 Datasheet

SimilarRFQ

SDM10U45-7

Diodes IncorporatedIn Stock: 95178SDM10U45-7 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1SS388(TL3,F,D) is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Technology: Schottky diode
• Mounting Type: Surface Mount
• Package / Case: SC-79 or SOD-523
• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 45 V
• Current - Average Rectified (Io): Equal to or greater than 100 mA
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute Classification:

Direct Substitutes maintain all critical electrical parameters within the original specification envelope. These parts are interchangeable without circuit redesign.

Similar Substitutes provide equivalent or superior electrical performance with minor parameter variations that remain within acceptable operating margins for the application. These parts require verification of specific application requirements before implementation.

The substitute parts identified below satisfy the mandatory compatibility criteria and are classified according to their parameter alignment with the original component.

Parameter Comparison

Engineering Selection Recommendations

CES388,L3F (Toshiba Semiconductor and Storage)

The CES388,L3F is an active product from the same manufacturer as the original component. It provides identical current rating (100 mA) and forward voltage characteristics (600 mV @ 100 mA). The reverse voltage rating is reduced to 40 V, which represents a 5 V margin reduction from the original 45 V specification. This part is ROHS3 compliant and maintains the same package configuration. Selection of this substitute is appropriate for applications where the 40 V reverse voltage rating satisfies circuit requirements.

SDM10U45-7 (Diodes Incorporated)

The SDM10U45-7 maintains the 100 mA current rating and provides equivalent package compatibility. The forward voltage is specified at 800 mV @ 100 mA, representing a 200 mV increase over the original specification. The reverse voltage rating is 40 V. This part is ROHS3 compliant and offers an extended operating temperature range to 125°C. Selection of this substitute is appropriate where the higher forward voltage drop is acceptable within circuit design margins.

PMEG4002EB,115 (Nexperia USA Inc.)

The PMEG4002EB,115 provides superior electrical performance with a 200 mA current rating, exceeding the original 100 mA specification. The reverse voltage rating is 40 V. Forward voltage is maintained at 600 mV @ 200 mA. Reverse leakage current is significantly reduced to 500 nA @ 25 V. This part is ROHS3 compliant and offers the highest maximum operating temperature of 150°C. Selection of this substitute is appropriate for applications requiring enhanced current capacity or improved leakage characteristics.

Frequently Asked Questions (FAQ)

Q: Can the CES388,L3F be used as a direct replacement for the 1SS388(TL3,F,D)?

A: The CES388,L3F is functionally compatible for applications where the 40 V reverse voltage rating is sufficient. The primary difference is the 5 V reduction in maximum reverse voltage. Both parts share identical current ratings, forward voltage characteristics, and package configurations. Verify that circuit operating conditions do not exceed 40 V reverse bias.

Q: What is the significance of the forward voltage difference in the SDM10U45-7?

A: The SDM10U45-7 specifies a forward voltage of 800 mV @ 100 mA, compared to 600 mV @ 50 mA for the original part. This 200 mV increase affects power dissipation and voltage drop across the diode during forward conduction. Circuits sensitive to forward voltage drop must account for this parameter variation in thermal and electrical calculations.

Q: Why does the PMEG4002EB,115 have a higher current rating than the original part?

A: The PMEG4002EB,115 is rated for 200 mA average rectified current, double the original 100 mA specification. This higher rating reflects the device's thermal and electrical design characteristics. The part remains compatible with 100 mA applications and provides additional design margin for current-sensitive circuits.

Q: Are all substitute parts compatible with the same PCB footprint?

A: All substitute parts utilize the SC-79 or SOD-523 package configuration, maintaining mechanical and electrical compatibility with the original PCB layout. No PCB redesign is required for footprint accommodation.

Q: What compliance certifications apply to the substitute parts?

A: All active substitute parts (CES388,L3F, SDM10U45-7, PMEG4002EB,115) are ROHS3 compliant. The original 1SS388(TL3,F,D) does not specify RoHS status. All parts maintain MSL 1 (Unlimited) moisture sensitivity classification and carry EAR99 ECCN designation.

Q: How does the reverse leakage current affect part selection?

A: Reverse leakage current is specified at different voltage and temperature conditions across the parts. The PMEG4002EB,115 exhibits the lowest leakage at 500 nA @ 25 V, while the original part specifies 5 µA @ 10 V. Lower leakage current reduces standby power consumption and improves circuit performance in high-impedance applications. Verify leakage specifications against application requirements.

Q: Can these parts be used interchangeably in production?

A: Substitution requires verification that the selected part meets all circuit design requirements, including reverse voltage rating, forward voltage drop, current capacity, and operating temperature range. While all parts share compatible packages and Schottky technology, electrical parameter variations necessitate circuit-level validation before production implementation.