SA7.5A-E3/54 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA7.5A-E3/54 is an active Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This unidirectional Zener-type TVS diode is designed for general-purpose transient voltage protection in through-hole applications. The device features a 7.5V reverse standoff voltage with a 12.9V maximum clamping voltage and 38.8A peak pulse current capability. With active product status and full RoHS3 compliance, equivalent and substitute parts are available from multiple manufacturers to support design flexibility, inventory optimization, and supply chain continuity.

Substiute Parts

SA7.5A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 793SA7.5A-E3/54 Datasheet

Current PartRFQ

SA7.5A

Taiwan Semiconductor CorporationIn Stock: 300283SA7.5A Datasheet

DirectRFQ

5KP7.5A

Littelfuse Inc.In Stock: 53045KP7.5A Datasheet

MFR RecommendedRFQ

LCE7.5A

LittelfuseIn Stock: 1007LCE7.5A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SA7.5A-E3/54 are qualified based on the following critical parameters that determine functional equivalence:

• Voltage - Reverse Standoff (Typ): 7.5V
• Voltage - Clamping (Max) @ Ipp: 12.9V
• Type: Zener, Unidirectional
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• RoHS Status: ROHS3 Compliant

Substitute parts may vary in Current - Peak Pulse (10/1000µs) and Power - Peak Pulse ratings, as these parameters define the device's surge handling capability rather than its voltage protection characteristics. Parts with equal or higher current and power ratings are functionally compatible for the same voltage protection application.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain full compliance with RoHS3 and REACH requirements, ensuring regulatory equivalence with the SA7.5A-E3/54. Selection among these alternatives depends on application-specific surge current and power dissipation requirements:

SA7.5A (Taiwan Semiconductor Corporation) provides direct functional equivalence with identical voltage and power ratings in the same DO-204AC package footprint. This part is suitable for direct replacement in existing designs.

5KP7.5A (Littelfuse Inc.) offers significantly higher peak pulse current (395.3A) and power dissipation (5000W) in a larger P600 package. This part is appropriate for applications requiring enhanced surge protection capability or higher energy absorption.

LCE7.5A (Littelfuse) provides intermediate surge capability (100A peak pulse, 1500W power) in a DO-201 package. This part bridges the performance gap between the standard SA7.5A and the high-power 5KP7.5A.

All parts maintain the same voltage protection characteristics (7.5V standoff, 12.9V clamping) and operating temperature range, ensuring consistent circuit protection performance across substitutions.

Frequently Asked Questions (FAQ)

Q: Can SA7.5A from Taiwan Semiconductor Corporation directly replace SA7.5A-E3/54 from Vishay?

A: Yes. Both parts share identical voltage ratings (7.5V standoff, 12.9V clamping), peak pulse current (40A vs. 38.8A), power dissipation (500W), package type (DO-204AC), and operating temperature range (-55°C ~ 175°C). The SA7.5A is a direct functional equivalent.

Q: What is the difference between the 5KP7.5A and SA7.5A?

A: The 5KP7.5A maintains identical voltage protection characteristics but provides substantially higher surge handling capability (395.3A peak pulse vs. 38.8A, and 5000W vs. 500W power dissipation). The 5KP7.5A uses a larger P600 package. Selection depends on whether the application requires enhanced transient energy absorption.

Q: Can I use LCE7.5A as a substitute for SA7.5A-E3/54?

A: Yes. The LCE7.5A maintains the same voltage protection parameters (7.5V standoff, 12.9V clamping) and operating temperature range. It provides higher surge capability (100A peak pulse, 1500W power) than the original part. The package differs (DO-201 vs. DO-204AC), requiring PCB layout verification for mechanical fit.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status, ensuring regulatory equivalence with the SA7.5A-E3/54 for applications subject to RoHS3 requirements.

Q: What determines whether a TVS diode can substitute for SA7.5A-E3/54?

A: The critical parameters are voltage ratings (7.5V reverse standoff, 12.9V clamping), Zener type, unidirectional configuration, through-hole mounting, and operating temperature range (-55°C ~ 175°C). Peak pulse current and power dissipation may vary; higher ratings provide enhanced surge protection without affecting voltage regulation characteristics.

Q: Do package differences affect substitution compatibility?

A: Package differences require PCB layout verification. SA7.5A (DO-204AC) and SA7.5A-E3/54 (DO-204AC) share identical footprints. LCE7.5A (DO-201) and 5KP7.5A (P600) use different packages and require confirmation of mechanical fit on the target PCB before implementation.