Equivalent & Substitute Parts for S1A-LS

Part Overview

The S1A-LS (Manufacturer: Diodes Incorporated) is a general-purpose rectifier diode with a maximum reverse voltage of 50 V and an average rectified current of 1A. It is categorized under Diodes, Rectifiers and is supplied in a surface-mount DO-214AC (SMA) package. The product is listed as Obsolete, making the identification of alternative models necessary to ensure continued availability and design support.

Substiute Parts

S1A-LS

Diodes IncorporatedIn Stock: 1091S1A-LS Datasheet

Current PartRFQ

S1M_HF

Diodes IncorporatedIn Stock: 5364S1M_HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is determined by matching critical electrical and mechanical parameters. Key parameters include category (Diodes, Rectifiers), average rectified current (Io), forward voltage (Vf), reverse voltage (Vr), reverse recovery time (trr), reverse leakage current, junction capacitance, mounting type, and package. Only parts with identical or superior electrical ratings and compatible packaging are considered suitable substitutes.

Parameter Comparison

Engineering Selection Recommendations

The S1A-LS is designated as Obsolete. For continued availability and compliance with ROHS3 and REACH standards, alternative models such as the S1M_HF should be selected based on equivalent or improved product certifications and active status. ECCN and HTSUS codes also match, supporting substitution from a regulatory perspective.

Frequently Asked Questions (FAQ)

Q1: What parameters must be matched when selecting an equivalent diode to S1A-LS?
A1: Substitution requires matching category, current rating, forward voltage, reverse voltage, reverse recovery time, reverse leakage current, capacitance, mounting type, and package.

Q2: Is the S1M_HF fully compatible with S1A-LS in surface mount designs?
A2: The S1M_HF has the same DO-214AC (SMA) surface-mount package and mounting type as the S1A-LS, ensuring mechanical compatibility.

Q3: Are there any differences in compliance or certification between the part numbers?
A3: Both S1A-LS and S1M_HF are ROHS3 Compliant and REACH Unaffected, with identical ECCN and HTSUS codes.

Q4: What is the impact of the product status on part selection?
A4: The S1A-LS is obsolete; selection should shift to active parts like S1M_HF with equivalent or higher ratings and matching compliance.

Q5: Can the substitute part exceed the original’s reverse voltage rating?
A5: Substitute components with a higher reverse voltage rating are permitted if all other key parameters match, as per the provided values.