LS4148WT Equivalent & Substitute Parts Reference

Part Overview

The LS4148WT is a surface-mount diode manufactured by Diodes Incorporated, categorized under Diodes, Rectifiers. It features a maximum DC reverse voltage of 75 V, average rectified current of 150 mA, and a reverse recovery time of 4 ns, with a 0603 (1608 Metric) package. The LS4148WT is now listed as obsolete. Sourcing alternative models is necessary to maintain design continuity, secure supply, and ensure RoHS3 and REACH compliance in ongoing or future production.

Substiute Parts

LS4148WT

Diodes IncorporatedIn Stock: 1120LS4148WT Datasheet

Current PartRFQ

1N4148WT-7

Diodes IncorporatedIn Stock: 1142131N4148WT-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for LS4148WT are identified strictly according to the following key parameters: maximum DC reverse voltage, average rectified current, voltage forward at specified test current, reverse recovery time, reverse leakage current, capacitance, mounting type, package, supplier device package, operating temperature range, RoHS and REACH compliance. Substitute parts in this group meet or exceed these criteria to ensure functional equivalence and regulatory conformity.

Key substitution parameters:

• Voltage - DC Reverse (Vr) (Max)
• Current - Average Rectified (Io)
• Voltage - Forward (Vf) (Max) @ If
• Reverse Recovery Time (trr)
• Current - Reverse Leakage @ Vr
• Capacitance @ Vr, F
• Package / Case
• Supplier Device Package
• Operating Temperature - Junction
• RoHS & REACH Status

Parameter Comparison

Engineering Selection Recommendations

The LS4148WT has an obsolete part status, while the 1N4148WT-7 is active. Both diodes are RoHS3 Compliant and REACH Unaffected, meeting standard regulatory requirements. Select the substitute 1N4148WT-7 based on matching or improved compliance and an active production status when replacing the obsolete LS4148WT.

Frequently Asked Questions (FAQ)

Q1: Which electrical and mechanical parameters are most critical for substituting LS4148WT?
A1: Critical parameters include voltage - DC reverse (Vr), current - average rectified (Io), voltage - forward (Vf), reverse recovery time (trr), reverse leakage, capacitance, package/case, supplier device package, and compliance status.

Q2: Is the package compatibility ensured between LS4148WT and 1N4148WT-7?
A2: LS4148WT is in a 0603 (1608 Metric) package, and 1N4148WT-7 is in an SC-79, SOD-523 package. Both are surface-mount but may differ dimensionally; check physical footprint compatibility as specified.

Q3: Are both diodes compliant with RoHS3 and REACH standards?
A3: Both LS4148WT and 1N4148WT-7 are RoHS3 Compliant and REACH Unaffected as per provided data.

Q4: How does operating temperature affect selection?
A4: LS4148WT operates from -65°C to 175°C; 1N4148WT-7 operates from -65°C to 150°C. Select based on the operating conditions required.

Q5: Does the difference in average rectified current or maximum DC reverse voltage impact equivalence?
A5: Substitute selection is based strictly on the given allowed ranges; verify the application does not exceed 1N4148WT-7's 125mA Io and 80V Vr values.