SA6.5-E3/54 Equivalent & Substitute Parts

Part Overview

The SA6.5-E3/54 is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This component is designed for general-purpose transient voltage suppression in through-hole applications using the DO-204AC (DO-15) axial package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Substiute Parts

SA6.5-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1024SA6.5-E3/54 Datasheet

Current PartRFQ

SA6.5A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 2215SA6.5A-E3/54 Datasheet

DirectRFQ

LCE6.5A

Littelfuse Inc.In Stock: 1150LCE6.5A Datasheet

MFR RecommendedRFQ

SA6.5A

Taiwan Semiconductor CorporationIn Stock: 16482SA6.5A Datasheet

MFR RecommendedRFQ

SA6.5A-AP

Micro Commercial CoIn Stock: 833SA6.5A-AP Datasheet

MFR RecommendedRFQ

SA6.5A-BP

Micro Commercial CoIn Stock: 859SA6.5A-BP Datasheet

MFR RecommendedRFQ

SA6.5A-TP

Micro Commercial CoIn Stock: 947SA6.5A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SA6.5-E3/54 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 6.5V
• Voltage - Breakdown (Min): 7.22V
• Type: Zener, Unidirectional
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 175°C
• Package compatibility: DO-204AC (DO-15) or equivalent axial packages

Substitute parts must maintain the same reverse standoff voltage and breakdown voltage specifications to ensure proper circuit protection. The clamping voltage, peak pulse current, and power dissipation may vary within acceptable ranges for the application. All substitutes listed are active products with current manufacturing status, providing long-term availability compared to the obsolete main part.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain the critical voltage specifications (6.5V reverse standoff and 7.22V minimum breakdown) required for circuit protection equivalence. Selection among active alternatives should prioritize:

Direct Package Compatibility (DO-204AC / DO-15): SA6.5A-E3/54, SA6.5A (Taiwan Semiconductor), SA6.5A-AP, SA6.5A-BP, and SA6.5A-TP provide identical or compatible axial through-hole packages for direct board-level substitution without layout modifications.

Enhanced Performance Option: LCE6.5A from Littelfuse offers higher peak pulse current (100A) and power dissipation (1500W) in a DO-201 package, suitable for applications requiring greater transient energy absorption. This part requires package footprint verification before implementation.

Compliance and Availability: All active substitutes maintain ROHS3 compliance and REACH unaffected status. SA6.5A-E3/54 from Vishay and SA6.5A from Taiwan Semiconductor offer the highest inventory levels (2143 and 16400 units respectively), ensuring supply continuity.

Clamping Voltage Consideration: The main part specifies 12.3V maximum clamping voltage, while most active substitutes specify 11.2V. This lower clamping voltage in substitutes provides improved transient suppression performance and is acceptable for general-purpose applications where the original specification was not a limiting constraint.

Frequently Asked Questions (FAQ)

Q: Can SA6.5A-E3/54 directly replace SA6.5-E3/54 without circuit modifications?

A: Yes. SA6.5A-E3/54 maintains identical voltage specifications (6.5V reverse standoff, 7.22V breakdown), the same DO-204AC (DO-15) axial package, and equivalent operating temperature range. The lower clamping voltage (11.2V vs 12.3V) represents improved performance for transient suppression.

Q: What is the difference between SA6.5A variants from different manufacturers?

A: SA6.5A from Taiwan Semiconductor, SA6.5A-AP, SA6.5A-BP, and SA6.5A-TP from Micro Commercial Co all maintain identical electrical specifications. Differences are limited to packaging format (Tape & Reel, Bulk) and inventory availability. All are electrically equivalent for circuit design purposes.

Q: Why does LCE6.5A have higher peak pulse current (100A vs 45.5A)?

A: LCE6.5A uses the DO-201 package, which provides larger physical dimensions and improved thermal characteristics compared to the DO-15 package. This enables higher current handling and power dissipation (1500W vs 500W). Package footprint compatibility must be verified before selection.

Q: Are all substitutes RoHS3 compliant?

A: SA6.5A-E3/54, LCE6.5A, SA6.5A (Taiwan Semiconductor), and SA6.5A-TP are explicitly RoHS3 compliant. SA6.5A-AP and SA6.5A-BP do not specify RoHS status in available documentation. Compliance verification is recommended for regulated applications.

Q: What is the primary reason the original SA6.5-E3/54 is obsolete?

A: The SA6.5-E3/54 has been superseded by improved variants within the TransZorb® series and competing products offering better performance characteristics, enhanced availability, and active manufacturing support. Active substitutes provide equivalent or superior functionality with assured long-term supply.