S1D-LTP Equivalent & Substitute Parts Reference

Part Overview

The S1D-LTP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AA (HSMB) package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary to maintain design continuity, support existing production lines, and ensure component availability for legacy systems and repair applications.

Substiute Parts

S1D-LTP

Micro Commercial CoIn Stock: 1185S1D-LTP Datasheet

Current PartRFQ

S1DB

Taiwan Semiconductor CorporationIn Stock: 6778S1DB Datasheet

Parametric EquivalentRFQ

S1DBH

Taiwan Semiconductor CorporationIn Stock: 6921S1DBH Datasheet

Parametric EquivalentRFQ

S1D_R1_00001

Panjit International Inc.In Stock: 1438S1D_R1_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the S1D-LTP is determined by electrical and mechanical parameter equivalence. All substitute parts must satisfy the following criteria:

Electrical Parameters (Critical for Substitution):

• Voltage - DC Reverse (Vr) (Max): 200 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
• Speed: Standard Recovery >500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 5 µA @ 200 V
• Capacitance @ Vr, F: 12 pF @ 4V, 1MHz

Mechanical Parameters (Critical for Substitution):

• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Operating Temperature - Junction: -55°C to 150°C

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts meet these criteria. Variations in product status (Active vs. Not For New Designs) and manufacturer do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

S1DB (Taiwan Semiconductor Corporation): This part is a direct parametric equivalent with all electrical and mechanical specifications matching the S1D-LTP. The S1DB carries Active product status, ensuring ongoing availability and manufacturing support. This part is suitable for applications where automotive qualification is not required.

S1DBH (Taiwan Semiconductor Corporation): This part is a direct parametric equivalent with all electrical and mechanical specifications matching the S1D-LTP. The S1DBH carries Active product status and includes Automotive Grade designation with AEC-Q101 qualification. This part is suitable for automotive applications and systems requiring automotive-grade component certification.

S1D_R1_00001 (Panjit International Inc.): This part is a direct parametric equivalent with all electrical and mechanical specifications matching the S1D-LTP. The reverse leakage current specification is superior (1 µA @ 200 V versus 5 µA @ 200 V), representing a tighter tolerance. The S1D_R1_00001 carries Active product status. This part is suitable for applications where lower reverse leakage is beneficial.

All three substitute parts are ROHS3 compliant, carry MSL 1 (Unlimited) rating, and operate across the identical temperature range. Selection between substitutes depends on application requirements: standard industrial use (S1DB), automotive applications (S1DBH), or applications benefiting from lower reverse leakage characteristics (S1D_R1_00001).

Frequently Asked Questions (FAQ)

Q: Can the S1DB be used as a direct replacement for the S1D-LTP?

A: Yes. The S1DB meets all electrical and mechanical parameter requirements of the S1D-LTP, including voltage rating (200 V), current rating (1 A), forward voltage drop (1.1 V @ 1 A), recovery characteristics, reverse leakage (5 µA @ 200 V), capacitance (12 pF @ 4V, 1MHz), and package specification (DO-214AA, SMB). Both components operate across -55°C to 150°C and are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between S1DB and S1DBH?

A: The S1DB and S1DBH are electrically and mechanically identical. The S1DBH includes Automotive Grade designation and AEC-Q101 qualification, making it suitable for automotive applications. The S1DB is intended for standard industrial applications. Both parts are manufactured by Taiwan Semiconductor Corporation and carry Active product status.

Q: Why does S1D_R1_00001 show lower reverse leakage current?

A: The S1D_R1_00001 specifies reverse leakage current of 1 µA @ 200 V, compared to 5 µA @ 200 V for the S1D-LTP and S1DB. This represents a tighter manufacturing tolerance on the same parameter. All other electrical and mechanical specifications remain equivalent. The lower reverse leakage may provide performance benefits in applications sensitive to leakage current.

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

A: Yes. All substitute parts (S1DB, S1DBH, S1D_R1_00001) are supplied in DO-214AA (SMB) surface mount package, identical to the S1D-LTP. All parts are supplied in Tape & Reel (TR) packaging format.

Q: Can I use these substitutes in new designs?

A: The S1DB, S1DBH, and S1D_R1_00001 all carry Active product status, making them suitable for new designs. The original S1D-LTP is marked "Not For New Designs" and should not be used in new applications. For new designs, select from the Active substitute parts based on application requirements (standard industrial, automotive, or low-leakage specifications).

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts (S1DB, S1DBH, S1D_R1_00001) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the S1D-LTP.

Q: What is the operating temperature range for these diodes?

A: All parts, including the S1D-LTP and all substitutes, operate across a junction temperature range of -55°C to 150°C, providing identical thermal performance specifications.