SA15A-T Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA15A-T is a unidirectional Zener-type transient voltage suppressor diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in through-hole applications. The device features a 15V reverse standoff voltage with a 24.4V maximum clamping voltage and 20.6A peak pulse current capability in a DO-15 axial package.

The SA15A-T is classified as obsolete. Equivalent and substitute parts are available from active manufacturers, providing direct functional alternatives with matching or comparable electrical specifications for continued circuit protection applications.

Key Parameters

Parameter	SA15A-T (Main Part)
Voltage - Reverse Standoff (Typ)	15V
Voltage - Breakdown (Min)	16.7V
Voltage - Clamping (Max) @ Ipp	24.4V
Current - Peak Pulse (10/1000µs)	20.6A
Power - Peak Pulse	500W
Operating Temperature Range	-65°C to 175°C (TJ)
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Type	Zener
Unidirectional Channels	1
Applications	General Purpose
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SA15A-T is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 15V nominal
Voltage - Clamping (Max) @ Ipp: 24.4V maximum
Current - Peak Pulse (10/1000µs): 20.6A minimum
Power - Peak Pulse: 500W minimum
Mounting Type: Through Hole
Package / Case: DO-15 or DO-204AC (axial configuration)
Type: Zener unidirectional TVS diode
Applications: General Purpose overvoltage protection

Substitute parts must maintain electrical equivalence within the specified voltage and current parameters while preserving through-hole axial package compatibility. Parts are grouped by manufacturer and packaging configuration (bulk or tape & reel).

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Product Status
SA15A-T	Diodes Incorporated	15V	24.4V	20.6A	500W	-65°C to 175°C	DO-15	Obsolete
SA15A	Taiwan Semiconductor Corporation	15V	24.4V	21A	500W	-55°C to 175°C	DO-204AC (DO-15)	Active
1N6464	Semtech Corporation	15V	26.5V	19A	500W	-65°C to 175°C	Axial	Discontinued at DiGi Electronics
P5KE15A-AP	Micro Commercial Co	15V	24.4V	20.6A	500W	-65°C to 175°C	DO-15	Active
P5KE15A-BP	Micro Commercial Co	15V	24.4V	20.6A	500W	-55°C to 175°C	DO-15	Active
P5KE15A-TP	Micro Commercial Co	15V	24.4V	20.6A	500W	-55°C to 175°C	DO-15	Active
P6KE18A	Fairchild Semiconductor	15.3V	25.2V	25A	600W	-50°C to 175°C	DO-15 (DO-204AC)	Active
SA15A-AP	Micro Commercial Co	15V	24.4V	20.9A	500W	-55°C to 175°C	DO-15	Active
SA15A-B	Littelfuse Inc.	15V	24.4V	20.9A	500W	-55°C to 175°C	DO-204AC (DO-15)	Active
SA15A-BP	Micro Commercial Co	15V	24.4V	20.9A	500W	-55°C to 175°C	DO-15	Active
SA15A-TP	Micro Commercial Co	15V	24.4V	20.9A	500W	-55°C to 175°C	DO-15	Active

Engineering Selection Recommendations

Direct Equivalents (Preferred for SA15A-T Replacement)

SA15A (Taiwan Semiconductor Corporation), P5KE15A-AP, P5KE15A-BP, P5KE15A-TP (Micro Commercial Co), SA15A-AP (Micro Commercial Co), SA15A-B (Littelfuse Inc.), SA15A-BP (Micro Commercial Co), and SA15A-TP (Micro Commercial Co) provide electrical equivalence with the SA15A-T across all critical parameters: 15V reverse standoff voltage, 24.4V clamping voltage, and 20.6A to 20.9A peak pulse current. All substitute parts are ROHS3 compliant and active in production, ensuring long-term availability and supply chain continuity.

Alternative with Enhanced Performance

P6KE18A (Fairchild Semiconductor) offers higher peak pulse current (25A) and power dissipation (600W) compared to the SA15A-T, providing additional margin for transient protection. The reverse standoff voltage is 15.3V and clamping voltage is 25.2V, representing a slight increase from the original specification. This part is suitable for applications requiring enhanced overvoltage protection capability.

Limited Availability Alternative

1N6464 (Semtech Corporation) maintains 15V reverse standoff voltage and 500W power rating with 19A peak pulse current. This part is discontinued at DiGi Electronics and represents a lower-performance alternative with reduced current handling capacity.

All recommended substitutes maintain through-hole axial package compatibility and are suitable for general-purpose transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: Can SA15A-T be directly replaced with SA15A?

A: Yes. SA15A from Taiwan Semiconductor Corporation provides direct electrical equivalence with matching 15V reverse standoff voltage, 24.4V clamping voltage, and 21A peak pulse current. The part is active in production and available in DO-204AC (DO-15) package configuration.

Q: What is the difference between P5KE15A variants (AP, BP, TP)?

A: The variants differ in packaging configuration and operating temperature range. P5KE15A-AP and P5KE15A-BP are supplied in bulk packaging, while P5KE15A-TP is supplied in tape & reel format. P5KE15A-AP operates from -65°C to 175°C, while BP and TP variants operate from -55°C to 175°C. All three maintain identical electrical specifications: 15V reverse standoff, 24.4V clamping, and 20.6A peak pulse current.

Q: Is P6KE18A a suitable replacement for SA15A-T?

A: P6KE18A is functionally compatible but represents an enhanced-performance alternative rather than a direct equivalent. It provides higher peak pulse current (25A) and power dissipation (600W), with slightly elevated clamping voltage (25.2V). Use P6KE18A when additional protection margin is required; use direct equivalents (SA15A, P5KE15A series, SA15A-B) for drop-in replacement.

Q: What is the significance of the SA15A-T being obsolete?

A: Obsolete status indicates the part is no longer manufactured by Diodes Incorporated. Active equivalent parts from other manufacturers (Taiwan Semiconductor Corporation, Micro Commercial Co, Littelfuse Inc.) provide identical or superior electrical performance and ensure continued availability for new designs and repairs.

Q: Are all substitute parts ROHS3 compliant?

A: SA15A (Taiwan Semiconductor Corporation), SA15A-B (Littelfuse Inc.), and SA15A-TP (Micro Commercial Co) are explicitly ROHS3 compliant. Compliance status for other substitutes (P5KE15A series, 1N6464, P6KE18A) is not specified in the provided data. Verify ROHS3 compliance with the manufacturer if regulatory compliance is required.

Q: Can SA15A-T be used in applications requiring -65°C minimum operating temperature?

A: Yes. SA15A-T operates from -65°C to 175°C. Most substitute parts (P5KE15A-AP, 1N6464) also support -65°C minimum temperature. However, SA15A, SA15A-B, SA15A-AP, SA15A-BP, and SA15A-TP operate from -55°C minimum. Verify application temperature requirements before selecting a substitute.

Q: What packaging formats are available for SA15A-T equivalents?

A: All substitutes are supplied in through-hole axial configuration (DO-15 or DO-204AC package). Packaging variants include bulk (loose components) and tape & reel (automated assembly format). Select packaging based on assembly method: bulk for manual assembly or repair, tape & reel for automated production lines.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message