SA14CA Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA14CA is a 14V Zener transient voltage suppressor diode in DO-15 axial package, manufactured by onsemi. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The SA14CA provides transient voltage suppression for general-purpose applications with a 23.2V maximum clamping voltage and 21.5A peak pulse current capability.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	14V
Voltage - Breakdown (Min)	15.6V
Voltage - Clamping (Max) @ Ipp	23.2V
Current - Peak Pulse (10/1000µs)	21.5A
Power - Peak Pulse	500W
Type	Zener
Bidirectional Channels	1
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Applications	General Purpose

Substitute Part Grouping Explanation

Substitution for the SA14CA is determined by matching the following critical electrical and mechanical parameters:

Voltage - Reverse Standoff: 14V (±tolerance)
Voltage - Clamping (Max) @ Ipp: 23.2V
Current - Peak Pulse (10/1000µs): 21.5A minimum
Power - Peak Pulse: 500W minimum
Type: Zener, Bidirectional (1 channel)
Mounting Type: Through Hole
Package compatibility: DO-15 or DO-204AC axial packages

Substitute parts are grouped into two categories based on electrical performance and package specifications:

Category 1: Direct Electrical Equivalents (Standard Performance) Parts maintaining 21.5A peak pulse current and 500W power dissipation in DO-15/DO-204AC packages.

Category 2: Enhanced Performance Alternatives (Higher Current Rating) Parts with identical voltage specifications but higher peak pulse current (219.8A) and power dissipation (5kW) in P600 package, suitable for applications requiring greater transient energy absorption.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package	Product Status
SA14CA	onsemi	14V	23.2V	21.5A	500W	DO-15	Obsolete
SA14CA	Taiwan Semiconductor Corporation	14V	23.2V	22.6A	500W	DO-204AC	Active
P5KE14CA-AP	Micro Commercial Co	14V	23.2V	21.5A	500W	DO-15	Active
P5KE14CA-BP	Micro Commercial Co	14V	23.2V	21.5A	500W	DO-15	Active
P5KE14CA-TP	Micro Commercial Co	14V	23.2V	21.5A	500W	DO-15	Active
SLD14-018	Littelfuse Inc.	14V	23.2V	219.8A	5000W	P600	Active
SLD14-018-B	Littelfuse Inc.	14V	23.2V	219.8A	5000W	P600	Active

Engineering Selection Recommendations

Direct Replacement (Same Electrical and Package Specifications):

The SA14CA from Taiwan Semiconductor Corporation is the primary direct replacement, offering active product status with identical voltage specifications and equivalent peak pulse current (22.6A vs. 21.5A). The DO-204AC package is mechanically compatible with DO-15 axial footprints.

The P5KE14CA series (P5KE14CA-AP, P5KE14CA-BP, P5KE14CA-TP) from Micro Commercial Co provides active alternatives with matching electrical parameters and DO-15 packaging. These parts are available in multiple packaging formats (Bulk variants) and maintain full electrical compatibility.

Enhanced Performance Alternative:

The SLD14-018 and SLD14-018-B from Littelfuse Inc. are suitable for applications requiring higher transient energy absorption. These parts maintain identical voltage specifications but operate in the P600 package with 219.8A peak pulse current and 5kW power dissipation. Both variants carry AEC-Q101 automotive qualification and ROHS3 compliance. Selection of this category requires PCB layout modification to accommodate the P600 package footprint.

Compliance Considerations:

All active substitute parts maintain REACH Unaffected status and EAR99 ECCN classification, consistent with the original SA14CA. The Littelfuse SLD14-018 series includes AEC-Q101 automotive qualification, suitable for automotive-grade applications.

Frequently Asked Questions (FAQ)

Q: Can I use the SA14CA from Taiwan Semiconductor Corporation as a direct replacement for the onsemi SA14CA?

A: Yes. Both parts share identical voltage specifications (14V standoff, 23.2V clamping), equivalent peak pulse current ratings (22.6A vs. 21.5A), and compatible axial packages (DO-204AC and DO-15 are mechanically interchangeable). The Taiwan Semiconductor version has active product status.

Q: What is the difference between the P5KE14CA variants (AP, BP, TP)?

A: All three variants (P5KE14CA-AP, P5KE14CA-BP, P5KE14CA-TP) from Micro Commercial Co share identical electrical specifications and DO-15 packaging. The suffix designates packaging format (Bulk). Selection depends on procurement and inventory requirements rather than electrical performance.

Q: When should I use the SLD14-018 instead of the standard 21.5A alternatives?

A: The SLD14-018 is appropriate for applications experiencing higher transient energy levels or requiring greater margin in transient suppression. The 219.8A peak pulse current and 5kW power dissipation provide approximately 10x greater energy absorption capability. This selection requires PCB redesign to accommodate the P600 package footprint and is suitable for automotive applications due to AEC-Q101 qualification.

Q: Are the DO-15 and DO-204AC packages mechanically interchangeable?

A: Yes. Both designations refer to the same axial through-hole package geometry. DO-15 and DO-204AC are equivalent package specifications for this component category, allowing direct PCB footprint compatibility.

Q: What is the operating temperature range for substitute parts?

A: The Taiwan Semiconductor SA14CA operates from -55°C to 175°C (TJ). The Micro Commercial Co P5KE14CA series operates from -65°C to 175°C (TJ). The Littelfuse SLD14-018 series operates from -55°C to 175°C (TJ). All ranges exceed typical industrial and automotive requirements.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All listed substitute parts maintain MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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