SS14LHRTG Equivalent & Substitute Parts

Part Overview

The SS14LHRTG is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40 V DC reverse voltage and 1 A average rectified current in a Sub SMA surface mount package. This component is classified as Active product status and carries automotive-grade qualification (AEC-Q101) with ROHS3 compliance.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set. The SS14LHRTG serves as the reference baseline for this equivalency analysis.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	400	µA @ 40 V
Package / Case	DO-219AB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55°C ~ 125°C	°C
Technology	Schottky	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters:

Electrical Parameters (Must Match or Exceed):

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io): 1 A minimum
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Parameters (Must Match):

Package / Case: DO-219AB
Mounting Type: Surface Mount
Supplier Device Package: Sub SMA or DO-219AB (SMF)

Compliance Parameters (Must Match or Exceed):

RoHS Status: ROHS3 Compliant
Operating Temperature Range: -55°C minimum to 125°C minimum

Automotive Grade (Preferred):

Grade: Automotive
Qualification: AEC-Q101

Substitute parts are classified as either Parametric Equivalent or Similar based on exact alignment with these criteria.

Parameter Comparison

Parameter	SS14LHRTG (Main)	SS14L (Parametric Equivalent)	SS1FL4HM3/H (Similar)
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division
Product Status	Active	Not For New Designs	Active
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V
Current - Average Rectified (Io)	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	550 mV @ 1 A	500 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	400 µA @ 40 V	400 µA @ 40 V	200 µA @ 40 V
Package / Case	DO-219AB	DO-219AB	DO-219AB
Supplier Device Package	Sub SMA	Sub SMA	DO-219AB (SMF)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 150°C
Technology	Schottky	Schottky	Schottky
Grade	Automotive	—	Automotive
Qualification	AEC-Q101	—	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SS14L (Parametric Equivalent - Taiwan Semiconductor Corporation)

The SS14L maintains identical electrical specifications to the SS14LHRTG across all critical parameters: 40 V reverse voltage, 1 A average rectified current, 550 mV forward voltage drop, and fast recovery characteristics. Both components share the DO-219AB package and Sub SMA supplier device package designation. ROHS3 compliance and MSL 1 rating are equivalent.

The SS14L is designated "Not For New Designs" by the manufacturer. This status indicates the part remains available for existing production and legacy applications but is not recommended for new circuit development. Selection of SS14L is appropriate for sustaining production of established designs where component qualification has been completed.

SS1FL4HM3/H (Similar - Vishay General Semiconductor - Diodes Division)

The SS1FL4HM3/H is manufactured by Vishay and meets all electrical requirements: 40 V reverse voltage, 1 A average rectified current, and fast recovery performance. This component offers improved forward voltage characteristics (500 mV @ 1 A versus 550 mV) and reduced reverse leakage current (200 µA @ 40 V versus 400 µA), resulting in lower power dissipation.

The SS1FL4HM3/H carries Active product status and maintains automotive-grade qualification (AEC-Q101) with extended operating temperature range (-55°C to 150°C versus -55°C to 125°C). The component is packaged in DO-219AB (SMF) format, which is mechanically compatible with the Sub SMA designation. ROHS3 compliance and MSL 1 rating are maintained.

Selection of SS1FL4HM3/H is appropriate for new designs requiring Schottky rectification at 40 V / 1 A with automotive qualification, or for applications where improved thermal performance and reduced leakage are beneficial.

Frequently Asked Questions (FAQ)

Q: Can SS14L be used as a direct replacement for SS14LHRTG in production?

A: Yes. The SS14L provides identical electrical performance across all specified parameters: 40 V reverse voltage, 1 A average rectified current, 550 mV forward voltage drop, and fast recovery speed. Both components use the DO-219AB package with Sub SMA supplier designation. The primary distinction is product status; SS14L is designated "Not For New Designs," indicating suitability for sustaining production of existing designs.

Q: What are the key differences between SS1FL4HM3/H and SS14LHRTG?

A: The SS1FL4HM3/H is manufactured by Vishay rather than Taiwan Semiconductor Corporation. Electrical differences include lower forward voltage (500 mV @ 1 A versus 550 mV) and reduced reverse leakage current (200 µA @ 40 V versus 400 µA). The SS1FL4HM3/H offers extended operating temperature range (-55°C to 150°C versus -55°C to 125°C). Both components are automotive-grade with AEC-Q101 qualification and ROHS3 compliance. Package compatibility is maintained through DO-219AB / DO-219AB (SMF) equivalence.

Q: Are all substitute parts automotive-qualified?

A: The SS14LHRTG and SS1FL4HM3/H both carry automotive-grade designation with AEC-Q101 qualification. The SS14L does not specify automotive grade or AEC-Q101 qualification in the provided parameters. Automotive qualification is a critical requirement for applications subject to automotive standards; component selection must confirm this attribute for regulated applications.

Q: What is the difference between Sub SMA and DO-219AB (SMF) package designations?

A: Sub SMA and DO-219AB (SMF) are equivalent package designations for the same physical form factor. Both refer to a surface mount Schottky diode package with identical mechanical dimensions and land pattern compatibility. Components specified with either designation are mechanically interchangeable on standard PCB layouts.

Q: Can SS1FL4HM3/H be used in applications where SS14LHRTG was previously qualified?

A: Electrical compatibility is confirmed across all specified parameters. However, design re-qualification may be required depending on application-specific requirements. The SS1FL4HM3/H offers improved thermal characteristics (lower forward voltage and leakage current) and extended temperature range, which may provide performance benefits. Compliance with automotive standards and design documentation requirements must be verified for each application.

Q: What inventory status should influence component selection?

A: The SS14LHRTG has 1,077 pieces in stock, SS14L has 23,321 pieces, and SS1FL4HM3/H has 33,182 pieces. Inventory availability may influence procurement strategy for high-volume production. However, component selection should be based primarily on electrical specifications, product status, and compliance requirements rather than inventory levels alone.

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