SS14L RFG Equivalent & Substitute Parts

Part Overview

The SS14L RFG 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 is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design requirements necessitate components with enhanced specifications or automotive-grade qualifications.

Substiute Parts

SS14L RFG

Taiwan Semiconductor CorporationIn Stock: 768SS14L RFG 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 of the SS14L RFG is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

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

Acceptable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: Substitute parts may exhibit lower forward voltage drop (improved performance)
• Current - Reverse Leakage @ Vr: Substitute parts may exhibit lower reverse leakage (improved performance)
• Operating Temperature - Junction: Substitute parts may support extended temperature ranges (enhanced capability)
• Capacitance @ Vr, F: When specified, provides additional design consideration

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and similar manufacturer parts (equivalent function with enhanced specifications or automotive qualification).

Parameter Comparison

Engineering Selection Recommendations

SS14L (Parametric Equivalent): This part maintains identical electrical specifications to the SS14L RFG across all critical parameters. However, the product status is classified as "Not For New Designs," indicating this part number is in mature or declining production phase. Selection of this substitute is appropriate for replacement or maintenance applications where existing designs require continuation. The parametric equivalence ensures direct functional interchangeability. Packaging is available in Cut Tape (CT) and Digi-Reel® formats, differing from the main part's Sub SMA packaging.

SS1FL4HM3/H (Similar Manufacturer Part): This Vishay part provides enhanced electrical performance relative to the SS14L RFG while maintaining the same voltage and current ratings. Key improvements include lower forward voltage drop (500 mV versus 550 mV @ 1 A) and lower reverse leakage current (200 µA versus 400 µA @ 40 V). The operating temperature range extends to 150°C, providing 25°C additional margin above the main part. This part carries automotive-grade qualification (AEC-Q101) and active product status, making it suitable for new designs requiring enhanced reliability or automotive applications. The DO-219AB (SMF) package maintains mechanical and thermal compatibility with the main part. Capacitance specification (115 pF @ 4V, 1MHz) is provided for high-frequency circuit analysis.

Selection Criteria:

• For direct replacement in existing designs: SS14L
• For new designs or automotive applications: SS1FL4HM3/H
• All substitute parts maintain RoHS3 compliance and REACH unaffected status
• All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080

Frequently Asked Questions (FAQ)

Q: Can SS14L RFG be directly replaced with SS14L?

A: Yes. The SS14L provides identical electrical specifications across all critical parameters: 40 V reverse voltage, 1 A average rectified current, 550 mV forward voltage drop @ 1 A, and fast recovery speed ≤ 500ns. The primary difference is packaging format (Cut Tape/Digi-Reel versus Sub SMA) and product status (Not For New Designs). Direct functional interchangeability is confirmed.

Q: What are the advantages of using SS1FL4HM3/H instead of SS14L RFG?

A: The SS1FL4HM3/H offers three measurable improvements: (1) lower forward voltage drop of 500 mV versus 550 mV @ 1 A, reducing power dissipation; (2) lower reverse leakage current of 200 µA versus 400 µA @ 40 V, improving efficiency; (3) extended operating temperature range to 150°C versus 125°C, providing additional thermal margin. Additionally, this part carries automotive-grade qualification (AEC-Q101) and active product status.

Q: Are all substitute parts compatible with the DO-219AB package footprint?

A: Yes. All listed substitute parts use the DO-219AB package / case designation. This ensures mechanical compatibility with existing printed circuit board layouts and assembly processes. Supplier device package designations may vary (Sub SMA, DO-219AB (SMF)) but refer to the same physical package standard.

Q: What is the significance of "Not For New Designs" status on the SS14L?

A: This status indicates the part is in mature production phase with declining availability and potential future discontinuation. While the part remains functionally equivalent and suitable for replacement applications, new circuit designs should consider the SS1FL4HM3/H or other active-status alternatives to ensure long-term supply continuity.

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes. All listed parts—SS14L RFG, SS14L, and SS1FL4HM3/H—are RoHS3 compliant with REACH unaffected status. Moisture sensitivity level is MSL 1 (unlimited) for all parts, indicating no special moisture control requirements during storage or handling.

Q: Can SS1FL4HM3/H be used in applications requiring extended temperature operation?

A: Yes. The SS1FL4HM3/H supports junction temperatures from -55°C to 150°C, compared to -55°C to 125°C for the SS14L RFG. This 25°C additional margin accommodates applications with elevated ambient temperatures or high-power dissipation conditions. All other electrical specifications remain equivalent or superior.

Q: What packaging formats are available for each substitute part?

A: SS14L RFG is supplied in Sub SMA format. The parametric equivalent SS14L is available in Cut Tape (CT) and Digi-Reel® formats. The SS1FL4HM3/H is supplied in Tape & Reel (TR) format. Selection depends on manufacturing process requirements and assembly equipment compatibility.