SA70A-E3/73 Equivalent & Substitute Parts

Part Overview

The SA70A-E3/73 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates as a Zener-type TVS device in the TransZorb® series, designed for general-purpose transient voltage protection applications. The device is currently in active product status with 32,300 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when alternative sourcing is required.

Substiute Parts

SA70A-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 32323SA70A-E3/73 Datasheet

Current PartRFQ

P6KE82A

Fairchild SemiconductorIn Stock: 7294P6KE82A Datasheet

MFR RecommendedRFQ

SA70A

Taiwan Semiconductor CorporationIn Stock: 890SA70A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SA70A-E3/73 are identified based on electrical parameter compatibility within the following criteria:

• Reverse standoff voltage: 70V (nominal)
• Breakdown voltage minimum: 77.8V
• Clamping voltage maximum at peak pulse current: 113V
• Peak pulse current rating: 4.4A or higher
• Power dissipation capability: 500W
• Package compatibility: DO-204AC (DO-15) axial through-hole configuration
• Operating temperature range: -55°C to 175°C or equivalent
• Unidirectional channel configuration: Single channel
• Product status: Active

Parts meeting these electrical and mechanical specifications are classified as direct substitutes. The SA70A-E3/73 base product number is SA70, and substitute parts maintain the same voltage class and functional characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SA70A (Taiwan Semiconductor Corporation) is the primary substitute for the SA70A-E3/73. Both devices share identical electrical specifications for reverse standoff voltage, breakdown voltage, clamping voltage, power dissipation, and operating temperature range. The SA70A demonstrates a marginally higher peak pulse current rating of 4.6A compared to the 4.4A of the primary part, providing equivalent or superior performance in transient suppression applications. Both parts are ROHS3 compliant, carry EAR99 export classification, and are packaged in the identical DO-204AC (DO-15) axial through-hole configuration. Product status is active for both devices.

The P6KE82A (Fairchild Semiconductor) is listed as a manufacturer-recommended substitute. However, complete electrical parameter specifications are not provided in the available data. Substitution with the P6KE82A requires verification against the primary part's electrical characteristics prior to circuit implementation.

All substitute parts maintain active product status and comply with applicable regulatory requirements (ROHS3, REACH Unaffected, EAR99).

Frequently Asked Questions (FAQ)

Q: What determines if a TVS diode can substitute for the SA70A-E3/73?

A: Substitute TVS diodes must match the following parameters: 70V reverse standoff voltage, 77.8V minimum breakdown voltage, 113V maximum clamping voltage at peak pulse current, 4.4A or higher peak pulse current rating, 500W peak pulse power dissipation, -55°C to 175°C operating temperature range, and DO-204AC (DO-15) axial through-hole package configuration.

Q: Is the SA70A from Taiwan Semiconductor Corporation a direct replacement?

A: Yes. The SA70A matches all electrical specifications of the SA70A-E3/73, including voltage ratings, current ratings, power dissipation, and operating temperature range. Both devices use identical packaging (DO-204AC, DO-15, Axial) and are ROHS3 compliant. The SA70A exhibits a peak pulse current rating of 4.6A, which exceeds the 4.4A requirement.

Q: Can the P6KE82A be used as a substitute?

A: The P6KE82A is listed as a manufacturer-recommended substitute. However, complete electrical parameter data is not available in the provided specifications. Confirmation of electrical compatibility with the SA70A-E3/73 is necessary before circuit implementation.

Q: Are there any packaging differences between substitute parts?

A: The SA70A (Taiwan Semiconductor) uses identical packaging (DO-204AC, DO-15, Axial) and mounting type (Through Hole) as the SA70A-E3/73. No package conversion or board redesign is required for this substitution.

Q: What is the inventory status of substitute parts?

A: The SA70A (Taiwan Semiconductor) has 855 units in stock. The P6KE82A (Fairchild Semiconductor) has 7,200 units in stock. The primary SA70A-E3/73 (Vishay) has 32,300 units in stock.

Q: Do all parts comply with regulatory requirements?

A: The SA70A-E3/73 and SA70A are both ROHS3 compliant and REACH Unaffected. Both carry EAR99 export classification. Regulatory compliance status for the P6KE82A is not specified in the available data.