HS1FLH Diode, Rectifiers – Equivalent & Substitute Parts Reference

Part Overview

The Taiwan Semiconductor Corporation HS1FLH is a surface mount, fast recovery rectifier diode rated for 300 V, 1A operation, with a reverse recovery time of 50 ns and a maximum forward voltage drop of 950 mV at 1 A. It is designed for automotive-grade applications, compliant with AEC-Q101, and delivered in SOD-123 (Sub SMA) packaging. The device is marked as “Not For New Designs,” making it essential to identify compatible substitute parts that match key electrical and mechanical parameters.

Substiute Parts

HS1FLH

Taiwan Semiconductor CorporationIn Stock: 947HS1FLH Datasheet

Current PartRFQ

HS1GLWH

Taiwan Semiconductor CorporationIn Stock: 20763HS1GLWH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute diodes for HS1FLH are determined solely by the equivalence or exceedance in all critical electrical parameters: voltage rating (Vr), average rectified current (Io), maximum forward voltage drop (Vf) at rated current, recovery speed (trr), reverse leakage, capacitance, and package compatibility. Additionally, compliance with automotive grade (AEC-Q101 qualification) is required, and surface mount package types must match or be compatible.

The following parameters are used for direct substitution:

• Voltage - DC Reverse (Vr) (Max)
• Current - Average Rectified (Io)
• Speed (Recovery Time trr)
• Package/Case & Mounting Type
• Automotive Grade & Qualification
• RoHS/REACH compliance status

Parameter Comparison

Engineering Selection Recommendations

The HS1FLH rectifier is listed as “Not For New Designs.” Substitute selection must verify automotive grade (AEC-Q101 qualification) and RoHS/REACH compliance. The HS1GLWH provides these certifications, with its product status indicated as Active.

Frequently Asked Questions (FAQ)

Q: What are the most critical parameters for substituting HS1FLH in a design?
A: The most critical parameters are voltage - DC reverse (Vr), average rectified current (Io), reverse recovery time (trr), package compatibility, automotive qualification, and RoHS/REACH compliance.

Q: Can HS1GLWH be used as a direct substitute for HS1FLH in automotive applications?
A: HS1GLWH fulfills AEC-Q101 automotive qualification and RoHS3/REACH compliance requirements. Review of package dimensions for compatibility between SOD-123 and SOD-123W is required.

Q: Is there any difference in speed or maximum continuous current between HS1FLH and HS1GLWH?
A: Both parts specify 1A average rectified current and a reverse recovery time of 50 ns.

Q: What packaging considerations should be made for substitution?
A: HS1FLH is provided in SOD-123 (Sub SMA) and HS1GLWH in SOD-123W. Verify footprint and height compatibility of SOD-123 and SOD-123W in the application’s PCB layout.

Q: Are both diodes free from hazardous substances and regulatory issues?
A: Both diodes are ROHS3 compliant and REACH unaffected, ECCN EAR99. These meet current environmental and export control requirements.