SS14L RHG Equivalent & Substitute Parts

Part Overview

The SS14L RHG is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications in the Sub SMA package format. This component operates at 40 V DC reverse voltage with 1 A average rectified current capacity and features fast recovery characteristics suitable for high-frequency switching applications.

The SS14L RHG maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support applications requiring alternative sourcing options while maintaining electrical and mechanical compatibility.

Substiute Parts

SS14L RHG

Taiwan Semiconductor CorporationIn Stock: 889SS14L RHG Datasheet

Current PartRFQ

SS14L

Taiwan Semiconductor CorporationIn Stock: 23363SS14L Datasheet

Parametric EquivalentRFQ

SS1FL4HM3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 33227SS1FL4HM3/H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SS14L RHG is determined by strict electrical and mechanical parameter matching within the Schottky rectifier diode category. The following criteria establish valid substitute relationships:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 40 V minimum
• Current - Average Rectified (Io): 1 A minimum
• Package / Case: DO-219AB (Sub SMA / SMF variants)
• Mounting Type: Surface Mount
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Compliance Requirements:

• RoHS3 Compliant status
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Operating Temperature Range: -55°C minimum to 125°C minimum

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications from the same manufacturer) and Similar Manufacturer Parts (alternative manufacturer sources meeting or exceeding all electrical and mechanical requirements).

Parameter Comparison

Engineering Selection Recommendations

SS14L (Parametric Equivalent): This part is a direct parametric equivalent from Taiwan Semiconductor Corporation with identical electrical specifications to the SS14L RHG. However, the product status is listed as "Not For New Designs," indicating this variant is in mature or declining production phase. Selection of this substitute is appropriate for legacy system maintenance, repair applications, and existing design continuity where supply of the RHG variant is constrained. RoHS3 compliance and unlimited MSL rating are maintained.

SS1FL4HM3/H (Similar Manufacturer - Vishay): This Vishay General Semiconductor part meets or exceeds all critical electrical parameters while offering additional performance advantages. The forward voltage drop is reduced to 500 mV (compared to 550 mV), and reverse leakage current is lower at 200 µA (compared to 400 µA). The operating temperature range extends to 150°C, providing enhanced thermal margin. This part carries Active product status with AEC-Q101 automotive qualification and eSMP® series designation. Selection is recommended for new designs requiring superior performance characteristics, automotive-grade reliability, and long-term supply assurance. RoHS3 compliance and unlimited MSL rating are maintained.

Both substitute parts are housed in the DO-219AB package format, ensuring mechanical and thermal compatibility with existing PCB layouts and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the SS14L substitute directly for the SS14L RHG in existing designs?

A: The SS14L is a parametric equivalent with identical electrical specifications and the same DO-219AB package. Direct substitution is electrically compatible. However, the SS14L carries "Not For New Designs" status, indicating limited future availability. For ongoing production, the Vishay SS1FL4HM3/H is recommended as it maintains Active status with superior performance characteristics.

Q: What are the key differences between the SS14L RHG and SS1FL4HM3/H?

A: Both parts share identical voltage and current ratings (40 V, 1 A) and the same DO-219AB package. The SS1FL4HM3/H offers lower forward voltage (500 mV vs. 550 mV), lower reverse leakage (200 µA vs. 400 µA), extended temperature range (-55 to 150°C vs. -55 to 125°C), and carries Active product status with AEC-Q101 automotive qualification. These characteristics make it suitable for high-reliability applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The SS14L RHG, SS14L, and SS1FL4HM3/H are all RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1). All parts are REACH unaffected and classified under ECCN EAR99.

Q: Does package compatibility affect substitution?

A: All listed substitute parts use the DO-219AB package format (Sub SMA / SMF variants). This ensures mechanical, thermal, and electrical compatibility with existing PCB layouts, solder reflow profiles, and assembly equipment without design modification.

Q: Which substitute is recommended for new product designs?

A: The SS1FL4HM3/H from Vishay is recommended for new designs. It maintains Active product status, provides superior electrical performance (lower forward voltage and reverse leakage), offers extended operating temperature range, and carries AEC-Q101 automotive qualification for enhanced reliability assurance.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: Yes. All substitute parts meet the fast recovery specification (≤ 500ns, > 200mA) required for high-frequency switching. The SS1FL4HM3/H offers additional performance margin with lower reverse leakage current, which may provide improved efficiency in demanding switching applications.