SLD14U-017 Equivalent & Substitute Parts

Part Overview

The SLD14U-017 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for transient overvoltage protection in electronic circuits. This component features a 14V reverse standoff voltage with a 23.2V maximum clamping voltage and peak pulse current capability of 219.8A at 5000W peak pulse power. The device is packaged in P600 axial through-hole configuration and is qualified to AEC-Q101 automotive standards. As an active product with established supply availability, equivalent and substitute parts are identified to support design flexibility, procurement alternatives, and supply chain continuity.

Substiute Parts

SLD14U-017

Littelfuse Inc.In Stock: 844SLD14U-017 Datasheet

Current PartRFQ

5KP14A

Littelfuse Inc.In Stock: 41375KP14A Datasheet

DirectRFQ

SA14A

Fairchild SemiconductorIn Stock: 300422SA14A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLD14U-017 are qualified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 14V
• Voltage - Breakdown (Min): 15.6V
• Voltage - Clamping (Max) @ Ipp: 23.2V
• Unidirectional configuration (1 channel)
• Operating Temperature Range: -55°C to 175°C

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: P600 Axial or equivalent axial through-hole configuration

Identified Substitutes:

1. 5KP14A (Littelfuse Inc.) — Direct electrical and mechanical equivalent with identical voltage ratings, clamping characteristics, and peak pulse specifications. Differs only in packaging format (Cut Tape vs. Tape & Reel) and application classification (General Purpose). Maintains full parameter compatibility.

2. SA14A (Fairchild Semiconductor) — Electrical voltage compatibility confirmed across standoff, breakdown, and clamping parameters. Mechanical compatibility maintained through axial through-hole package (DO-204AC / DO-15). Peak pulse current reduced to 22A and power rating reduced to 500W, indicating lower transient energy handling capacity. Product status is Obsolete.

Parameter Comparison

Engineering Selection Recommendations

5KP14A Selection: The 5KP14A is the primary direct substitute for the SLD14U-017. Both components are manufactured by Littelfuse Inc., maintain identical electrical specifications across all critical voltage and current parameters, and share the same P600 axial package configuration. Both products are Active with current manufacturing status and ROHS3 compliance. Selection of the 5KP14A introduces no electrical or mechanical compromises and is suitable for direct replacement in applications requiring the full 5000W peak pulse power rating.

SA14A Selection: The SA14A is a secondary substitute option with full voltage parameter compatibility but reduced transient energy handling capacity. Peak pulse current is limited to 22A and power dissipation to 500W, representing a 90% reduction in peak pulse current and power rating compared to the SLD14U-017. The SA14A is classified as Obsolete and should be selected only when application transient energy requirements are confirmed to be within the 500W power envelope. Mechanical compatibility is maintained through the DO-204AC (DO-15) axial through-hole package, though physical dimensions may differ from the P600 package.

Frequently Asked Questions (FAQ)

Q: Can the 5KP14A be used as a direct replacement for the SLD14U-017?

A: Yes. The 5KP14A is electrically and mechanically equivalent to the SLD14U-017. Both components share identical voltage ratings (14V standoff, 15.6V breakdown, 23.2V clamping), peak pulse current (219.8A), power dissipation (5000W), and axial through-hole package configuration. The only difference is packaging format (Cut Tape vs. Tape & Reel).

Q: What are the limitations of using SA14A as a substitute?

A: The SA14A maintains voltage compatibility but operates at significantly reduced transient energy levels. Peak pulse current is 22A (versus 219.8A) and power rating is 500W (versus 5000W). This substitute is appropriate only for applications where transient overvoltage events remain within the 500W power envelope. The SA14A is also classified as Obsolete, limiting long-term supply availability.

Q: Are there package compatibility concerns between P600 and DO-204AC packages?

A: Both packages are axial through-hole configurations suitable for PCB mounting. Physical dimensions differ between P600 and DO-204AC (DO-15) packages. Verify PCB footprint and lead spacing compatibility before selecting SA14A as a substitute, as board layout modifications may be required.

Q: Do all substitute parts meet automotive qualification standards?

A: The SLD14U-017 and 5KP14A both carry AEC-Q101 automotive qualification. The SA14A does not list AEC-Q101 qualification in the provided specifications. For automotive applications requiring AEC-Q101 compliance, the 5KP14A is the appropriate substitute.

Q: What is the impact of product status on part selection?

A: The SLD14U-017 and 5KP14A are both Active products with current manufacturing and established supply chains. The SA14A is Obsolete, indicating discontinued production. For new designs or long-term production requirements, Active products (SLD14U-017 or 5KP14A) are recommended to ensure sustained component availability.