SA26A Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA26A is a unidirectional Zener-type transient voltage suppressor diode in DO-15 (DO-204AC) axial package configuration. Manufactured by onsemi, this component is designed for general-purpose transient voltage suppression applications with a 26V reverse standoff voltage and 42.1V maximum clamping voltage at peak pulse current of 11.9A.

The SA26A is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value	Unit
Type	Zener	—
Unidirectional Channels	1	—
Voltage - Reverse Standoff (Typ)	26	V
Voltage - Breakdown (Min)	28.9	V
Voltage - Clamping (Max) @ Ipp	42.1	V
Current - Peak Pulse (10/1000µs)	11.9	A
Power - Peak Pulse	500	W
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SA26A is determined by strict equivalence across the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 26V
Voltage - Breakdown (Min): 28.9V
Voltage - Clamping (Max) @ Ipp: 42.1V
Current - Peak Pulse (10/1000µs): 11.9A
Power - Peak Pulse: 500W
Mounting Type: Through Hole
Package / Case: DO-204AC, DO-15, Axial

Direct Equivalents maintain identical electrical specifications and package configuration. These parts are functionally interchangeable with the SA26A.

Similar Parts share the same reverse standoff voltage and clamping voltage characteristics but may differ in peak pulse current, power dissipation, or packaging format. These parts are suitable for applications where the SA26A specifications are met or exceeded, provided mechanical and thermal constraints are satisfied.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Reverse Standoff (Typ) [V]	Voltage - Breakdown (Min) [V]	Voltage - Clamping (Max) @ Ipp [V]	Current - Peak Pulse (10/1000µs) [A]	Power - Peak Pulse [W]	Package	Operating Temperature [°C]
SA26A	onsemi	Obsolete	26	28.9	42.1	11.9	500	DO-15	—
SA26A-E3/54	Vishay General Semiconductor - Diodes Division	Active	26	28.9	42.1	11.9	500	DO-204AC (DO-15)	-55 to 175
SA26AHE3/54	Vishay General Semiconductor - Diodes Division	Active	26	28.9	42.1	11.9	500	DO-204AC (DO-15)	-55 to 175
P5KE26A-AP	Micro Commercial Co	Active	26	28.9	42.1	11.9	500	DO-15	-65 to 175
P5KE26A-BP	Micro Commercial Co	Active	26	28.9	42.1	11.9	500	DO-15	-65 to 175
P5KE26A-TP	Micro Commercial Co	Active	26	28.9	42.1	11.9	500	DO-15	-65 to 175
SA26A-B	Littelfuse Inc.	Active	26	28.9	42.1	12.1	500	DO-204AC (DO-15)	-55 to 175
P6KE30A	Taiwan Semiconductor Corporation	Active	25.6	28.5	41.4	14.5	600	DO-15	—
LCE28A	Littelfuse Inc.	Active	28	31.1	45.5	33	1500	DO-201	-55 to 175

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

The following parts maintain identical electrical specifications to the SA26A and are classified as active products:

SA26A-E3/54 (Vishay): Active status, ROHS3 compliant, operating temperature range -55°C to 175°C. Supplied in Tape & Reel packaging.
SA26AHE3/54 (Vishay): Active status, ROHS3 compliant, AEC-Q101 automotive qualified, operating temperature range -55°C to 175°C. Supplied in Tape & Reel packaging.
P5KE26A-AP, P5KE26A-BP, P5KE26A-TP (Micro Commercial Co): Active status, operating temperature range -65°C to 175°C. Supplied in Bulk packaging.
SA26A-B (Littelfuse): Active status, ROHS3 compliant, operating temperature range -55°C to 175°C. Supplied in Bulk packaging. Peak pulse current specification is 12.1A, within acceptable tolerance of the SA26A 11.9A specification.

Similar Parts (Secondary Substitutes):

P6KE30A (Taiwan Semiconductor Corporation): Active status, ROHS3 compliant. Reverse standoff voltage 25.6V, clamping voltage 41.4V, peak pulse current 14.5A, and power dissipation 600W. Electrical parameters are within acceptable range for applications where the SA26A specifications are met or exceeded.
LCE28A (Littelfuse): Active status, ROHS3 compliant. Reverse standoff voltage 28V, clamping voltage 45.5V, peak pulse current 33A, and power dissipation 1500W. Package is DO-201 (different from SA26A DO-15). Suitable for applications requiring higher current handling capability.

Compliance Considerations:

All recommended substitutes maintain REACH Unaffected status and EAR99 export classification consistent with the SA26A. ROHS3 compliance is confirmed for Vishay, Littelfuse, and Taiwan Semiconductor Corporation variants. Moisture Sensitivity Level 1 (Unlimited) is maintained across all direct equivalents.

Frequently Asked Questions (FAQ)

Q: Can SA26A-E3/54 and SA26AHE3/54 be used interchangeably with the original SA26A?

A: Yes. Both parts maintain identical electrical specifications (26V reverse standoff, 28.9V breakdown, 42.1V clamping, 11.9A peak pulse current, 500W power dissipation) and through-hole DO-15 package configuration. SA26AHE3/54 includes AEC-Q101 automotive qualification. Both are active products with confirmed ROHS3 compliance.

Q: What is the difference between the Micro Commercial Co P5KE26A variants (AP, BP, TP)?

A: The P5KE26A-AP, P5KE26A-BP, and P5KE26A-TP maintain identical electrical specifications and package configuration. The suffix designates packaging format or tape configuration. All three are active products with operating temperature range -65°C to 175°C, which exceeds the SA26A specification.

Q: Is P6KE30A a suitable substitute for SA26A?

A: P6KE30A is a similar part with comparable voltage characteristics (25.6V reverse standoff vs. 26V, 41.4V clamping vs. 42.1V). However, it provides higher peak pulse current (14.5A vs. 11.9A) and greater power dissipation (600W vs. 500W). This part is suitable for applications where the SA26A specifications are met or exceeded, provided circuit design accommodates the higher current capability.

Q: Can LCE28A replace SA26A in existing designs?

A: LCE28A differs in package format (DO-201 vs. DO-15) and electrical specifications (28V reverse standoff vs. 26V, 45.5V clamping vs. 42.1V, 33A peak pulse current vs. 11.9A). Mechanical compatibility must be verified before substitution. LCE28A is suitable for applications requiring higher transient current suppression capability.

Q: Are all substitute parts RoHS compliant?

A: ROHS3 compliance is confirmed for SA26A-E3/54, SA26AHE3/54, SA26A-B, P6KE30A, and LCE28A. Micro Commercial Co P5KE26A variants (AP, BP, TP) do not list RoHS status in provided specifications. Verify RoHS compliance requirements for your application before selection.

Q: What is the significance of the SA26AHE3/54 AEC-Q101 qualification?

A: AEC-Q101 qualification indicates the part meets automotive-grade reliability standards. This certification is relevant for applications requiring automotive-level component qualification. Non-automotive applications do not require this qualification.

Q: Can I use substitute parts in existing PCB designs without modification?

A: Direct equivalents (SA26A-E3/54, SA26AHE3/54, P5KE26A variants, SA26A-B) maintain identical through-hole DO-15 package configuration and can be used as direct replacements. Similar parts with different package formats (LCE28A in DO-201) require PCB layout verification before substitution.

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