RSFGLH Equivalent & Substitute Parts Engineering Reference

Part Overview

The Taiwan Semiconductor Corporation RSFGLH is a fast recovery diode with a reverse voltage rating of 400 V and a maximum average rectified current of 0.5A in a surface-mount SOD-123 (Sub SMA) package. This diode is classified as "Not For New Designs," indicating it is no longer recommended for design-in to new applications or projects. It is necessary to find alternative models to ensure long-term availability and design continuity, especially for projects requiring Automotive grade and AEC-Q101 qualification.

Key Parameters

Parameter	RSFGLH Value
Manufacturer	Taiwan Semiconductor Corporation
Category	Diodes, Rectifiers
Packaging	Tape & Reel (TR)
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	500mA
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 500 mA
Speed	Fast Recovery =< 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Grade	Automotive
Qualification	AEC-Q101
Mounting Type	Surface Mount
Package / Case	SOD-123
Supplier Device Package	Sub SMA
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the RSFGLH are selected strictly based on these parameters: voltage - DC reverse (Vr), current - average rectified (Io), voltage - forward (Vf) at rated current, speed (reverse recovery time, trr), current - reverse leakage at rated voltage, automotive grade, AEC-Q101 qualification, mounting type, package/case, RoHS and REACH status. Substitution is valid if these parameters meet or exceed the original part’s ratings and compliance requirements.

Parameter Comparison

Parameter	RSFGLH	RS1GLWH
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation
Category	Diodes, Rectifiers	Diodes, Rectifiers
Packaging	Tape & Reel (TR)	Tape & Reel (TR)
Voltage - DC Reverse (Vr) (Max)	400 V	400 V
Current - Average Rectified (Io)	500mA	1A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 500 mA	1.3 V @ 1 A
Speed (trr)	150 ns	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V
Grade	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101
Mounting Type	Surface Mount	Surface Mount
Package / Case	SOD-123	SOD-123W
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The RSFGLH is marked "Not For New Designs," and is therefore unsuitable for new circuit implementations. The RS1GLWH meets automotive grade, AEC-Q101 qualification, ROHS3, and REACH compliance compatibility requirements. Packaging format and mounting type are confirmed as surface-mount SOD-123 series. Inventory and product status indicate ongoing availability for RS1GLWH.

Frequently Asked Questions (FAQ)

Q1: What criteria must a substitute diode meet to replace RSFGLH?
A1: Substitute diodes must match or exceed voltage - DC reverse (Vr), average rectified current (Io), voltage - forward (Vf) at rated current, reverse recovery time (trr), reverse leakage current, automotive grade, AEC-Q101 qualification, RoHS and REACH status, surface mount package, and equivalent case type.

Q2: Is RS1GLWH form, fit, and function compatible with RSFGLH?
A2: RS1GLWH meets the electrical performance and compliance parameters of RSFGLH. The main packaging difference is SOD-123W versus SOD-123; verify package outline compatibility for direct PCB placement.

Q3: Are the automotive grade and AEC-Q101 qualification identical for RS1GLWH and RSFGLH?
A3: Both RSFGLH and RS1GLWH are graded for Automotive applications and are AEC-Q101 qualified.

Q4: What is the reverse recovery time comparison between RSFGLH and its substitute?
A4: Both RSFGLH and RS1GLWH have a reverse recovery time (trr) of 150 ns.

Q5: Are there any compliance differences between RSFGLH and RS1GLWH?
A5: Both RSFGLH and RS1GLWH are ROHS3 compliant and REACH unaffected.

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