SA30HE3/73 Equivalent & Substitute Parts

Part Overview

The SA30HE3/73 is a 30V Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for transient overvoltage protection in through-hole applications. This component features a 54.6V maximum clamping voltage and 9.3A peak pulse current capability in a DO-204AC (DO-15) axial package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and field replacement requirements.

Substiute Parts

SA30HE3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 871SA30HE3/73 Datasheet

Current PartRFQ

SA30AHE3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 1175SA30AHE3/73 Datasheet

DirectRFQ

SA30A

Taiwan Semiconductor CorporationIn Stock: 45164SA30A Datasheet

MFR RecommendedRFQ

SA30A-B

Littelfuse Inc.In Stock: 970SA30A-B Datasheet

MFR RecommendedRFQ

SA30A-TP

Micro Commercial CoIn Stock: 894SA30A-TP Datasheet

MFR RecommendedRFQ

SAC30-AP

Micro Commercial CoIn Stock: 1105SAC30-AP Datasheet

MFR RecommendedRFQ

SAC30-BP

Micro Commercial CoIn Stock: 830SAC30-BP Datasheet

MFR RecommendedRFQ

SAC30-TP

Micro Commercial CoIn Stock: 1089SAC30-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA30HE3/73 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Reverse Standoff Voltage: 30V (Typ)
• Breakdown Voltage (Min): 33.3V
• Package/Case: DO-204AC, DO-15, Axial
• Mounting Type: Through Hole
• Type: Zener, Unidirectional (1 channel)
• Operating Temperature Range: -55°C ~ 175°C
• Peak Pulse Power: 500W
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Clamping Voltage (Max) @ Ipp: 48.4V to 64.3V
• Peak Pulse Current (10/1000µs): 9.3A to 10.8A

All substitute parts listed maintain identical standoff and breakdown voltages, identical package specifications, and identical thermal and environmental ratings. Variations in clamping voltage and peak pulse current remain within the functional tolerance band for 30V TVS diode applications.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the SA30HE3/73 within the specified parameter tolerance band. Selection among active alternatives should be based on the following criteria:

Primary Selection Criteria:

• Product Status: All substitute parts are classified as Active, ensuring ongoing availability and manufacturing support
• Compliance: All parts maintain ROHS3 compliance and REACH Unaffected status
• Certifications: SA30AHE3/73 carries AEC-Q101 automotive qualification, matching the original part's automotive-grade designation

Secondary Selection Considerations:

• SA30AHE3/73 (Vishay): Direct manufacturer continuation with identical series designation (TransZorb®), lowest clamping voltage (48.4V), and automotive qualification
• SA30A (Taiwan Semiconductor): Highest peak pulse current capability (10.8A) and highest inventory availability (45,100 pcs)
• SA30A-B (Littelfuse): Active status with moderate inventory (866 pcs) and balanced electrical characteristics
• SA30A-TP (Micro Commercial Co): Cut Tape packaging format for automated assembly applications
• SAC30-AP, SAC30-BP, SAC30-TP (Micro Commercial Co): Functionally equivalent with consistent 48.6V clamping voltage across all variants

Frequently Asked Questions (FAQ)

Q: Can SA30HE3/73 be directly replaced with any of the listed substitutes?

A: Yes. All listed parts maintain identical reverse standoff voltage (30V), breakdown voltage (33.3V minimum), operating temperature range (-55°C to 175°C), package type (DO-204AC/DO-15 axial), and power rating (500W). Clamping voltage and peak pulse current variations fall within the functional tolerance band for 30V TVS diode applications.

Q: What is the difference between SA30AHE3/73 and SA30A?

A: Both are electrically compatible substitutes. SA30AHE3/73 is manufactured by Vishay with AEC-Q101 automotive qualification and 48.4V clamping voltage. SA30A is manufactured by Taiwan Semiconductor with 64.3V clamping voltage and significantly higher inventory availability (45,100 units). Selection depends on clamping voltage requirements and supply chain preferences.

Q: Are packaging format differences (Tape & Reel, Bulk, Cut Tape) significant for substitution?

A: Packaging format affects procurement and assembly processes but does not impact electrical or mechanical compatibility. The underlying component specifications remain identical. Select packaging format based on manufacturing requirements and volume needs.

Q: Does the obsolete status of SA30HE3/73 affect the validity of these substitutes?

A: No. The obsolete designation indicates the original part is no longer manufactured. All listed substitutes are Active products with confirmed ongoing production and availability, making them suitable for new designs and field replacements.

Q: Are there any thermal or environmental limitations when substituting?

A: No. All substitute parts maintain the identical operating temperature range (-55°C to 175°C) and moisture sensitivity level (MSL 1 - Unlimited) as the original part. Environmental performance is equivalent across all alternatives.

Q: Which substitute offers the best balance of availability and performance?

A: Selection depends on specific application requirements. SA30AHE3/73 provides direct manufacturer continuity with automotive qualification. SA30A offers maximum peak pulse current (10.8A) and highest inventory. SAC30 variants provide consistent performance across multiple packaging options.