SA10A Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA10A is a unidirectional Zener-type transient voltage suppressor diode manufactured by onsemi, designed for general-purpose overvoltage protection in through-hole applications. The device features a 10V reverse standoff voltage with 17V maximum clamping voltage and 29.4A peak pulse current capability in a DO-15 package. The main part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	10	V
Voltage - Breakdown (Min)	11.1	V
Voltage - Clamping (Max) @ Ipp	17	V
Current - Peak Pulse (10/1000µs)	29.4	A
Power - Peak Pulse	500	W
Type	Zener	-
Unidirectional Channels	1	-
Mounting Type	Through Hole	-
Package / Case	DO-204AC, DO-15, Axial	-

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical parameter alignment with the SA10A:

Direct Equivalents (Electrical Parameters Match): Parts that maintain identical or equivalent voltage ratings (10V reverse standoff, 11.1V minimum breakdown, 17V maximum clamping) and current handling (29.4A peak pulse) within the same 500W power dissipation class. These parts are mechanically compatible in DO-15 or DO-204AC packages and support direct replacement without circuit redesign.

Similar Alternatives (Voltage Parameters Match, Current/Power Variations): Parts that maintain the same voltage protection window (10V standoff, 11.1V breakdown, 17V clamping) but differ in peak pulse current and power dissipation ratings. These are suitable for applications where higher current handling or power capacity is acceptable or beneficial, provided mechanical package compatibility is confirmed.

Key Parameters for Substitution Determination:

Voltage - Reverse Standoff: 10V (±tolerance)
Voltage - Breakdown (Min): 11.1V
Voltage - Clamping (Max) @ Ipp: 17V
Unidirectional Channels: 1
Mounting Type: Through Hole
Package Compatibility: DO-15, DO-204AC, or Axial

Parameter Comparison

Part Number	Manufacturer	VWM (V)	VBR Min (V)	VC Max (V)	Ipp (A)	Power (W)	Package	Status
SA10A	onsemi	10	11.1	17	29.4	500	DO-15	Obsolete
SA10A	Taiwan Semiconductor Corporation	10	11.1	17	30	500	DO-204AC	Active
SA10A-E3/54	Vishay General Semiconductor	10	11.1	17	29.4	500	DO-204AC	Active
SA10AHE3/54	Vishay General Semiconductor	10	11.1	17	29.4	500	DO-204AC	Active
P5KE10A-AP	Micro Commercial Co	10	11.1	17	29.4	500	DO-15	Active
P5KE10A-BP	Micro Commercial Co	10	11.1	17	29.4	500	DO-15	Active
1N8153	Microchip Technology	10	11.4	16.9	8.88	150	Axial	Active
5KP10A-G	Comchip Technology	10	11.1	17	294.12	5000	R-6	Active
LCE10A	Littelfuse	10	11.1	17	88	1500	DO-201	Active
LCE10A-TP	Micro Commercial Co	10	11.1	17	88	1500	DO-201AE	Active
LCE11A	Littelfuse Inc.	11	12.2	18.2	82	1500	DO-201	Active

Engineering Selection Recommendations

Tier 1 - Direct Electrical Equivalents (Preferred for Drop-In Replacement):

SA10A-E3/54 (Vishay) and SA10A (Taiwan Semiconductor Corporation) maintain identical electrical specifications to the obsolete onsemi SA10A. Both are active products with ROHS3 compliance and REACH unaffected status. SA10A-E3/54 is available in Cut Tape packaging with 5200 units in stock. The Taiwan Semiconductor version is available in Tape & Reel with 2236 units in stock. Both support direct circuit substitution without modification.

SA10AHE3/54 (Vishay) provides equivalent electrical performance with automotive-grade qualification (AEC-Q101) and is suitable for applications requiring automotive reliability standards. Available in Tape & Reel packaging with 1162 units in stock.

P5KE10A-AP and P5KE10A-BP (Micro Commercial Co) maintain identical electrical specifications in DO-15 package format, matching the original onsemi package. Both are active with REACH unaffected status and provide extended temperature range (-65°C to 175°C). Available in bulk packaging with 1085 and 1043 units respectively.

Tier 2 - Electrical Equivalents with Enhanced Current/Power Ratings:

LCE10A (Littelfuse) and LCE10A-TP (Micro Commercial Co) maintain voltage protection parameters while providing 88A peak pulse current and 1500W power dissipation, exceeding the SA10A specification. These are suitable for applications where higher transient energy absorption is required. LCE10A uses DO-201 package; LCE10A-TP uses DO-201AE package. Both are active with ROHS3 compliance.

5KP10A-G (Comchip Technology) provides 294.12A peak pulse current and 5000W power dissipation in R-6 package. This part is suitable for high-energy transient suppression applications where the SA10A current rating is insufficient. Active product with ROHS3 compliance.

Not Recommended for Direct Substitution:

1N8153 (Microchip Technology) exhibits reduced peak pulse current (8.88A) and power dissipation (150W), making it unsuitable for applications requiring the SA10A's 29.4A/500W performance. Additionally, RoHS non-compliance status limits use in regulated environments.

LCE11A (Littelfuse Inc.) features different voltage ratings (11V standoff, 12.2V breakdown, 18.2V clamping), placing it outside the SA10A protection window and unsuitable for direct replacement.

Frequently Asked Questions (FAQ)

Q: Can SA10A-E3/54 directly replace the obsolete onsemi SA10A?

A: Yes. SA10A-E3/54 maintains identical electrical specifications (10V standoff, 11.1V breakdown, 17V clamping, 29.4A peak pulse, 500W power) and is available in DO-204AC package, which is mechanically equivalent to DO-15. Both are unidirectional Zener-type TVS diodes for general-purpose applications.

Q: What is the difference between DO-15 and DO-204AC packages?

A: DO-15 and DO-204AC are equivalent axial through-hole packages for diodes. DO-204AC is the standardized designation; DO-15 is an alternate designation for the same physical package. Parts specified in either designation are mechanically interchangeable.

Q: Why is LCE10A listed as a similar alternative rather than a direct equivalent?

A: LCE10A maintains the same voltage protection window (10V standoff, 11.1V breakdown, 17V clamping) but provides higher peak pulse current (88A vs. 29.4A) and power dissipation (1500W vs. 500W). While electrically compatible for voltage protection, the enhanced current rating represents a design change. Selection depends on whether the application requires or can tolerate higher transient energy absorption capacity.

Q: Is the Taiwan Semiconductor Corporation SA10A equivalent to the onsemi SA10A?

A: Yes, with minor specification variance. The Taiwan Semiconductor version provides 30A peak pulse current versus the onsemi specification of 29.4A, while maintaining identical voltage ratings and 500W power dissipation. This represents a negligible performance difference suitable for direct replacement.

Q: Can P5KE10A-AP be used in place of the onsemi SA10A?

A: Yes. P5KE10A-AP maintains identical electrical specifications (10V standoff, 11.1V breakdown, 17V clamping, 29.4A peak pulse, 500W power) and is packaged in DO-15, matching the original package format. The part is active with extended operating temperature range (-65°C to 175°C).

Q: What does "Obsolete" product status mean for the onsemi SA10A?

A: Obsolete status indicates the manufacturer has discontinued production and support. Existing inventory may be available from distributors, but long-term supply cannot be guaranteed. Substitution with active equivalent parts is necessary for new designs and ongoing production requirements.

Q: Are all substitute parts RoHS compliant?

A: Most recommended substitutes are ROHS3 compliant. The exception is 1N8153 (Microchip Technology), which is RoHS non-compliant and not recommended for applications requiring RoHS compliance.

Q: Can LCE11A substitute for SA10A?

A: No. LCE11A operates at different voltage ratings (11V standoff, 12.2V breakdown, 18.2V clamping) outside the SA10A protection window. Using LCE11A would alter circuit protection characteristics and is not suitable for direct replacement.

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