SA6.5-E3/73 Equivalent & Substitute Parts

Part Overview

The SA6.5-E3/73 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This component is designed for general-purpose transient voltage suppression applications in through-hole configurations. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.

Substiute Parts

SA6.5-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 1214SA6.5-E3/73 Datasheet

Current PartRFQ

SA6.5A-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 32210SA6.5A-E3/73 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-E3/73 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 6.5V
• Voltage - Breakdown (Min): 7.22V
• Unidirectional Channels: 1
• Type: Zener
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 175°C

Substitute parts must maintain identical reverse standoff voltage and breakdown voltage specifications to ensure proper circuit protection. The unidirectional channel configuration and Zener type are fixed requirements. Through-hole mounting compatibility is essential for board-level integration. Operating temperature range must support the full specified range.

Clamping voltage, peak pulse current, and power dissipation may vary within acceptable limits for the application, provided the core voltage protection parameters remain constant.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain the critical voltage parameters (6.5V reverse standoff, 7.22V minimum breakdown) required for functional equivalence to the SA6.5-E3/73. Selection among active alternatives should prioritize product status and compliance certifications.

SA6.5A-E3/73 (Vishay): Direct manufacturer evolution from the obsolete SA6.5-E3/73. Active status with ROHS3 compliance. Identical package and mounting specifications. Clamping voltage reduced to 11.2V with increased peak pulse current (44.7A). Suitable for direct replacement in existing designs.

SA6.5A (Taiwan Semiconductor Corporation): Active product with ROHS3 compliance. Maintains DO-204AC package compatibility. Peak pulse current of 46A and 500W power rating match original specifications closely. Tape & Reel packaging available for production volumes.

LCE6.5A (Littelfuse Inc.): Active product with ROHS3 compliance. Offers enhanced performance with 100A peak pulse current and 1500W power dissipation. Package variant (DO-201AA, DO-27) requires mechanical verification for board compatibility. Suitable for applications requiring higher transient current handling.

SA6.5A-AP, SA6.5A-BP, SA6.5A-TP (Micro Commercial Co): Active products with identical electrical specifications (45.5A peak pulse, 11.2V clamping). Available in bulk and tape & reel packaging options. Compliance certifications not fully specified. Suitable for cost-optimized procurement strategies.

Frequently Asked Questions (FAQ)

Q: Can SA6.5A-E3/73 directly replace SA6.5-E3/73 in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (6.5V), breakdown voltage (7.22V), operating temperature range (-55°C to 175°C), and DO-204AC package specifications. The SA6.5A-E3/73 is the active successor to the obsolete SA6.5-E3/73.

Q: What is the difference between the clamping voltages listed for these parts?

A: The SA6.5-E3/73 specifies 12.3V maximum clamping voltage, while most active substitutes specify 11.2V. Both values fall within acceptable transient suppression performance for the 6.5V standoff class. The lower clamping voltage in newer designs represents improved performance characteristics.

Q: Is LCE6.5A compatible with existing PCB layouts designed for SA6.5-E3/73?

A: LCE6.5A uses DO-201AA (DO-27) package, which differs from the DO-204AC (DO-15) package of the original part. Physical dimensions and lead spacing require mechanical verification before board-level substitution. Electrical parameters are compatible.

Q: Which substitute part should be selected for high-volume production?

A: SA6.5A (Taiwan Semiconductor Corporation) or SA6.5A-TP (Micro Commercial Co) are available in tape & reel packaging suitable for automated assembly. Both maintain full electrical equivalence and active product status with compliance certifications.

Q: Are all substitute parts ROHS3 compliant?

A: SA6.5A-E3/73, SA6.5A (TSC), and SA6.5A-TP are explicitly ROHS3 compliant. SA6.5A-AP and SA6.5A-BP do not specify compliance status in available documentation.

Q: Can these parts be used interchangeably in the same circuit?

A: Yes, provided the application tolerates the specified parameter variations. All parts maintain the critical 6.5V reverse standoff and 7.22V breakdown voltages. Peak pulse current and power dissipation variations are acceptable for general-purpose transient suppression applications.