SA75A-E3/1 Equivalent & Substitute Parts

Part Overview

The SA75A-E3/1 is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for general-purpose transient voltage protection in through-hole applications. This part operates with a 75V reverse standoff voltage and provides 121V maximum clamping voltage at peak pulse current of 4.1A, with 500W peak pulse power handling capability. The SA75A-E3/1 is classified as obsolete. Equivalent and substitute parts are available from active product lines that maintain identical or compatible electrical and mechanical specifications, enabling continued circuit protection functionality in new designs and legacy system maintenance.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	75V
Voltage - Breakdown (Min)	83.3V
Voltage - Clamping (Max) @ Ipp	121V
Current - Peak Pulse (10/1000µs)	4.1A
Power - Peak Pulse	500W
Operating Temperature Range	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitute parts for the SA75A-E3/1 are qualified based on strict electrical parameter equivalence across the following criteria:

Voltage - Reverse Standoff: 75V (nominal)
Voltage - Breakdown (Min): 83.3V
Voltage - Clamping (Max) @ Ipp: 121V
Current - Peak Pulse (10/1000µs): 4.1A minimum
Power - Peak Pulse: 500W
Mounting Type: Through Hole
Package / Case: DO-204AC, DO-15, Axial
Type: Zener, Unidirectional

Substitutes are grouped into two categories:

Category 1: Vishay Direct Equivalents (Same Manufacturer)

SA75A-E3/54: Identical electrical specifications, active product status, tape & reel packaging
SA75AHE3/54: Identical electrical specifications, active product status, automotive-grade with AEC-Q101 qualification, tape & reel packaging

Category 2: Cross-Manufacturer Equivalents (Micro Commercial Co)

P5KE75A-AP, P5KE75A-BP, P5KE75A-TP: Identical electrical specifications, active product status, bulk packaging

Category 3: Alternative Manufacturer (Taiwan Semiconductor Corporation)

SA75A: Identical electrical specifications, active product status, tape & reel packaging, peak pulse current 4.3A (exceeds minimum requirement)

Category 4: Cross-Manufacturer Alternative (Micro Commercial Co)

SA75A-TP: Identical electrical specifications, active product status, bulk packaging, peak pulse current 4.2A (exceeds minimum requirement)

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Packaging Type
SA75A-E3/1	Vishay General Semiconductor	Obsolete	75V	83.3V	121V	4.1A	500W	-55°C ~ 175°C	DO-204AC (DO-15)	Bulk
SA75A-E3/54	Vishay General Semiconductor	Active	75V	83.3V	121V	4.1A	500W	-55°C ~ 175°C	DO-204AC (DO-15)	Tape & Reel
SA75AHE3/54	Vishay General Semiconductor	Active	75V	83.3V	121V	4.1A	500W	-55°C ~ 175°C	DO-204AC (DO-15)	Tape & Reel
P5KE75A-AP	Micro Commercial Co	Active	75V	83.3V	121V	4.1A	500W	-65°C ~ 175°C	DO-15	Bulk
P5KE75A-BP	Micro Commercial Co	Active	75V	83.3V	121V	4.1A	500W	-65°C ~ 175°C	DO-15	Bulk
P5KE75A-TP	Micro Commercial Co	Active	75V	83.3V	121V	4.1A	500W	-65°C ~ 175°C	DO-15	Bulk
SA75A	Taiwan Semiconductor Corporation	Active	75V	83.3V	121V	4.3A	500W	-55°C ~ 175°C	DO-204AC (DO-15)	Tape & Reel
SA75A-TP	Micro Commercial Co	Active	75V	83.3V	121V	4.2A	500W	-55°C ~ 175°C	DO-15	Bulk

Engineering Selection Recommendations

All substitute parts listed maintain electrical equivalence to the SA75A-E3/1 across critical transient suppression parameters. Selection among substitutes should be based on the following engineering criteria:

For Continued Vishay Supply Chain Integration: SA75A-E3/54 provides direct manufacturer continuity with identical specifications and active product status. SA75AHE3/54 offers the same electrical performance with automotive-grade qualification (AEC-Q101) for applications requiring automotive compliance.

For Extended Temperature Range: P5KE75A-AP, P5KE75A-BP, and P5KE75A-TP from Micro Commercial Co extend the lower operating temperature limit to -65°C, providing enhanced performance in cryogenic or extreme cold environments compared to the -55°C minimum of the original part.

For Enhanced Peak Pulse Current Performance: SA75A from Taiwan Semiconductor Corporation and SA75A-TP from Micro Commercial Co both exceed the minimum 4.1A peak pulse current specification, offering 4.3A and 4.2A respectively, providing additional transient suppression margin.

For Packaging Considerations: Tape & Reel packaging (SA75A-E3/54, SA75AHE3/54, SA75A) is suitable for automated assembly processes. Bulk packaging (P5KE75A-AP, P5KE75A-BP, P5KE75A-TP, SA75A-TP) is appropriate for manual assembly or lower-volume applications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SA75A-E3/1 with any of the listed substitutes?

A: Yes. All listed substitutes maintain identical electrical specifications for reverse standoff voltage (75V), breakdown voltage (83.3V minimum), clamping voltage (121V maximum), peak pulse current (4.1A minimum), and peak pulse power (500W). All are through-hole mounted in DO-15 or DO-204AC packages and are electrically interchangeable.

Q: What is the difference between SA75A-E3/54 and SA75AHE3/54?

A: Both parts are from Vishay with identical electrical specifications and active product status. SA75AHE3/54 carries automotive-grade qualification (AEC-Q101) and is designated for automotive applications. SA75A-E3/54 is designated for general-purpose applications. Select SA75AHE3/54 if your application requires automotive compliance.

Q: Why do some substitutes have a lower operating temperature minimum (-65°C vs -55°C)?

A: The Micro Commercial Co P5KE75A series (P5KE75A-AP, P5KE75A-BP, P5KE75A-TP) extends the lower operating temperature limit to -65°C. This provides enhanced performance in extreme cold environments. If your application operates only within -55°C to 175°C, this difference is not relevant.

Q: What is the difference between packaging types (Tape & Reel vs Bulk)?

A: Tape & Reel packaging is optimized for automated pick-and-place assembly in high-volume manufacturing. Bulk packaging is suitable for manual assembly, prototyping, or lower-volume production runs. Electrical performance is identical; packaging choice depends on assembly process requirements.

Q: Are there compliance differences between substitutes?

A: All substitutes maintain ROHS3 compliance and REACH Unaffected status consistent with the original SA75A-E3/1. SA75AHE3/54 additionally carries AEC-Q101 automotive qualification. Select based on your application's compliance requirements.

Q: Can I use P5KE75A parts as direct replacements in existing designs?

A: Yes. P5KE75A-AP, P5KE75A-BP, and P5KE75A-TP are electrically equivalent and mechanically compatible in DO-15 through-hole packages. The extended lower temperature range (-65°C) provides additional operational margin without affecting performance in standard temperature ranges.

Q: Which substitute offers the best peak pulse current performance?

A: SA75A from Taiwan Semiconductor Corporation provides the highest peak pulse current at 4.3A, followed by SA75A-TP at 4.2A. Both exceed the minimum 4.1A requirement, offering additional transient suppression margin. All other substitutes meet the 4.1A minimum specification.

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