SA8V5A Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA8V5A is a unidirectional Zener-type transient voltage suppressor diode manufactured by onsemi, housed in a DO-15 (DO-204AC) axial through-hole package. This component is designed for general-purpose transient voltage suppression applications with a reverse standoff voltage of 8.5V and peak pulse current handling of 34.7A at a clamping voltage of 14.4V. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Substiute Parts

SA8V5A

onsemiIn Stock: 770SA8V5A Datasheet

Current PartRFQ

SA8.5A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 967SA8.5A-E3/54 Datasheet

DirectRFQ

SA8.5AHE3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 847SA8.5AHE3/54 Datasheet

DirectRFQ

P6KE10A

Fairchild SemiconductorIn Stock: 5025P6KE10A Datasheet

SimilarRFQ

SA8.5A

Taiwan Semiconductor CorporationIn Stock: 8461SA8.5A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA8V5A is determined by strict equivalence across the following critical parameters:

• Reverse standoff voltage: 8.5V (nominal)
• Breakdown voltage minimum: 9.44V or higher
• Clamping voltage maximum: 14.4V or lower
• Peak pulse current: 34.7A or higher
• Peak pulse power: 500W or higher
• Package type: DO-15 / DO-204AC axial through-hole
• Unidirectional Zener configuration

Substitute parts are grouped into two categories: direct equivalents (matching all electrical parameters within tolerance) and similar alternatives (meeting or exceeding electrical performance with compatible packaging).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Preferred for Replacement):

SA8.5A-E3/54 (Vishay General Semiconductor - Diodes Division) and SA8.5AHE3/54 (Vishay General Semiconductor - Diodes Division) are direct electrical equivalents to the SA8V5A. Both parts maintain identical voltage and current specifications. SA8.5A-E3/54 is available in standard commercial grade with ROHS3 compliance. SA8.5AHE3/54 is qualified to AEC-Q101 automotive standards and carries automotive-grade designation, making it suitable for applications requiring automotive qualification.

Similar Alternative:

SA8.5A (Taiwan Semiconductor Corporation) provides equivalent electrical performance with 36A peak pulse current, exceeding the original 34.7A specification. This part is ROHS3 compliant and active in production.

P6KE10A (Fairchild Semiconductor) offers enhanced performance with 43A peak pulse current and 600W peak pulse power, both exceeding original specifications. Clamping voltage is marginally higher at 14.5V. This part is active and suitable for applications where increased transient suppression margin is acceptable.

All substitute parts are available in active production status, ensuring long-term supply continuity compared to the obsolete SA8V5A.

Frequently Asked Questions (FAQ)

Q: Can SA8.5A-E3/54 directly replace SA8V5A in existing designs?

A: Yes. SA8.5A-E3/54 is a direct electrical equivalent with identical reverse standoff voltage (8.5V), breakdown voltage (9.44V minimum), clamping voltage (14.4V maximum), and peak pulse current (34.7A). Both use DO-15 / DO-204AC axial through-hole packaging. No circuit modifications are required.

Q: What is the difference between SA8.5A-E3/54 and SA8.5AHE3/54?

A: Both parts are electrically identical. SA8.5AHE3/54 carries AEC-Q101 automotive qualification and automotive-grade designation. Select SA8.5AHE3/54 for applications requiring automotive compliance; use SA8.5A-E3/54 for general-purpose applications.

Q: Is P6KE10A a suitable substitute?

A: P6KE10A meets the core voltage specifications (8.5V standoff, 9.5V minimum breakdown, 14.5V clamping) and exceeds current handling with 43A peak pulse. The 0.1V higher clamping voltage is within acceptable tolerance for most applications. This part is suitable where enhanced transient suppression capability is beneficial.

Q: Why is SA8V5A listed as obsolete?

A: The SA8V5A is no longer in active production by onsemi. Multiple active equivalent and superior alternatives from established manufacturers ensure design continuity without performance compromise.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use DO-15 / DO-204AC axial through-hole packaging, maintaining mechanical and electrical compatibility with original PCB designs. Packaging variants (tape & reel, bulk) differ by supplier but do not affect component functionality.

Q: What compliance certifications apply to these substitutes?

A: SA8.5A-E3/54 and SA8.5A are ROHS3 compliant. SA8.5AHE3/54 is ROHS3 compliant and AEC-Q101 qualified. All parts are REACH unaffected. Verify specific compliance requirements for your application before final selection.