SA75A-E3/73 Equivalent & Substitute Parts

Part Overview

The SA75A-E3/73 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for general-purpose transient voltage protection applications, featuring a 75V reverse standoff voltage and 121V maximum clamping voltage. The part is currently in active product status with 32,400 units available in stock. Alternative equivalent parts may be required due to supply chain considerations, inventory availability, or specific packaging requirements in manufacturing environments.

Substiute Parts

SA75A-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 32459SA75A-E3/73 Datasheet

Current PartRFQ

SA75A

Taiwan Semiconductor CorporationIn Stock: 681SA75A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA75A-E3/73 is determined by strict equivalence across the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff: 75V (nominal)
• Voltage - Breakdown (Min): 83.3V
• Voltage - Clamping (Max) @ Ipp: 121V
• Package / Case: DO-204AC (DO-15), Axial through-hole configuration
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• RoHS Compliance: ROHS3 Compliant

The SA75A manufactured by Taiwan Semiconductor Corporation meets all specified electrical parameters and mechanical requirements. Variations in peak pulse current (4.3A vs. 4.1A) remain within acceptable tolerance for general-purpose TVS applications while maintaining identical voltage characteristics and thermal performance.

Parameter Comparison

Engineering Selection Recommendations

Both the SA75A-E3/73 and SA75A are active-status components meeting ROHS3 compliance requirements. Selection between these parts should be based on:

• Packaging format requirements: The SA75A-E3/73 is supplied in bulk packaging, while the SA75A is available in Tape & Reel format for automated assembly processes.
• Inventory availability: The SA75A-E3/73 has significantly higher stock levels (32,400 units) compared to SA75A (664 units).
• Peak pulse current specification: The SA75A provides 4.3A peak pulse current versus 4.1A for the SA75A-E3/73, offering slightly higher transient handling capability within the same voltage and power envelope.

Both parts maintain identical electrical performance for voltage suppression, clamping characteristics, and thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can SA75A replace SA75A-E3/73 in existing designs?

A: Yes. Both parts share identical voltage specifications (75V standoff, 83.3V breakdown minimum, 121V clamping maximum), power rating (500W peak pulse), operating temperature range (-55°C to 175°C), and DO-204AC through-hole package configuration. The SA75A provides equivalent or superior electrical performance.

Q: What is the difference in peak pulse current between these parts?

A: The SA75A-E3/73 is rated for 4.1A peak pulse current, while the SA75A is rated for 4.3A. Both operate within the same 500W power envelope and are suitable for general-purpose transient voltage suppression applications.

Q: Are there packaging differences between these parts?

A: Yes. The SA75A-E3/73 is supplied in bulk packaging, while the SA75A is available in Tape & Reel (TR) format. Both use the same DO-204AC (DO-15) axial through-hole package for PCB mounting.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SA75A-E3/73 and SA75A are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS coding (8541.10.0080).

Q: Which part should be selected for new designs?

A: Selection depends on manufacturing requirements. For automated assembly with tape-and-reel packaging, the SA75A is appropriate. For manual assembly or bulk procurement, the SA75A-E3/73 offers higher inventory availability. Both are electrically equivalent for circuit design purposes.