SA30A-E3/1 Equivalent & Substitute Parts

Part Overview

The SA30A-E3/1 is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This component is designed for general-purpose transient voltage protection in through-hole applications using the DO-204AC (DO-15) axial package. The SA30A-E3/1 is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	30V
Voltage - Breakdown (Min)	33.3V
Voltage - Clamping (Max) @ Ipp	48.4V
Current - Peak Pulse (10/1000µs)	10A
Power - Peak Pulse	500W
Operating Temperature Range	-55°C ~ 175°C
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitution for the SA30A-E3/1 is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff: 30V
Voltage - Breakdown (Min): 33.3V
Voltage - Clamping (Max) @ Ipp: 48.4V (±tolerance acceptable)
Current - Peak Pulse (10/1000µs): 10A (±tolerance acceptable)
Power - Peak Pulse: 500W
Operating Temperature Range: -55°C ~ 175°C minimum
Mounting Type: Through Hole
Package / Case: DO-204AC, DO-15, Axial
Type: Zener
Unidirectional Channels: 1

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (Vishay): Parts SA30A-E3/54 and SA30AHE3/54 are manufactured by Vishay and maintain identical electrical specifications with variations only in packaging format (Cut Tape vs. Tape & Reel) and product status (Active vs. Obsolete).

Cross-Manufacturer Alternatives: Parts from Micro Commercial Co (P5KE30A series), Taiwan Semiconductor Corporation (SA30A), Littelfuse Inc. (SA30A-B, SAC30), and Micro Commercial Co (SA30A-TP) provide electrical equivalence within specified tolerances while maintaining the same package footprint and thermal characteristics.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status	Packaging
SA30A-E3/1	Vishay	30V	33.3V	48.4V	10A	500W	-55°C ~ 175°C	Obsolete	DO-204AC (DO-15)
SA30A-E3/54	Vishay	30V	33.3V	48.4V	10A	500W	-55°C ~ 175°C	Active	Cut Tape (CT)
SA30AHE3/54	Vishay	30V	33.3V	48.4V	10A	500W	-55°C ~ 175°C	Active	Tape & Reel (TR)
P5KE30A-AP	Micro Commercial Co	30V	33.3V	48.4V	10.3A	500W	-65°C ~ 175°C	Active	Bulk
P5KE30A-BP	Micro Commercial Co	30V	33.3V	48.4V	10.3A	500W	-65°C ~ 175°C	Active	Bulk
P5KE30A-TP	Micro Commercial Co	30V	33.3V	48.4V	10.3A	500W	-65°C ~ 175°C	Active	Bulk
SA30A	Taiwan Semiconductor Corporation	30V	33.3V	64.3V	10.8A	500W	-55°C ~ 175°C	Active	Tape & Reel (TR)
SA30A-B	Littelfuse Inc.	30V	33.3V	48.4V	10.5A	500W	-55°C ~ 175°C	Active	Bulk
SA30A-TP	Micro Commercial Co	30V	33.3V	48.4V	10.5A	500W	-55°C ~ 175°C	Active	Cut Tape (CT)
SAC30	Littelfuse Inc.	30V	33.3V	48.6V	10A	500W	-55°C ~ 175°C	Active	Cut Tape (CT)

Engineering Selection Recommendations

Primary Recommendation: SA30A-E3/54 or SA30AHE3/54 (Vishay) are the preferred direct substitutes. Both maintain identical electrical specifications to the SA30A-E3/1 and are manufactured by the original supplier. SA30A-E3/54 is available in Cut Tape packaging with 12,018 units in stock, while SA30AHE3/54 is available in Tape & Reel packaging with AEC-Q101 automotive qualification and 1,061 units in stock. Both parts are ROHS3 compliant and REACH unaffected.

Secondary Recommendations: Cross-manufacturer alternatives including P5KE30A-BP, SA30A-B, SA30A-TP, and SAC30 provide functional equivalence with active product status and higher inventory availability. These parts maintain the critical voltage and current specifications within acceptable tolerances. The P5KE30A series from Micro Commercial Co offers extended low-temperature operation to -65°C. Littelfuse SA30A-B and SAC30 maintain the original -55°C lower temperature limit.

Consideration for SA30A (Taiwan Semiconductor): While this part shares the same base voltage rating and current capability, the clamping voltage of 64.3V exceeds the original specification of 48.4V. This part should only be selected if the application circuit can tolerate higher clamping voltage.

All recommended substitutes are through-hole mounted in DO-204AC or DO-15 axial packages, ensuring mechanical and electrical compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can SA30A-E3/54 be used as a direct replacement for SA30A-E3/1?

A: Yes. SA30A-E3/54 is electrically and mechanically identical to SA30A-E3/1. The only difference is packaging format (Cut Tape vs. the original format) and active product status. Both are manufactured by Vishay and maintain identical electrical specifications.

Q: What is the difference between SA30A-E3/54 and SA30AHE3/54?

A: Both parts are electrically identical with 30V reverse standoff, 33.3V breakdown minimum, and 48.4V clamping voltage. SA30AHE3/54 is supplied in Tape & Reel packaging and includes AEC-Q101 automotive qualification. SA30A-E3/54 is supplied in Cut Tape packaging. Select based on packaging requirements and automotive qualification needs.

Q: Are P5KE30A series parts from Micro Commercial Co compatible?

A: Yes, P5KE30A-AP, P5KE30A-BP, and P5KE30A-TP are compatible substitutes. They maintain the same 30V reverse standoff, 33.3V breakdown, and 48.4V clamping voltage. Peak pulse current is slightly higher at 10.3A versus 10A. Operating temperature range extends to -65°C minimum. All are supplied in Bulk packaging.

Q: Why does SA30A from Taiwan Semiconductor have a different clamping voltage?

A: SA30A has a clamping voltage of 64.3V compared to the original 48.4V specification. This part should only be selected if the application circuit design can accommodate higher clamping voltage. The reverse standoff and breakdown voltages remain equivalent at 30V and 33.3V respectively.

Q: What packaging options are available for substitutes?

A: Substitute parts are available in Cut Tape (CT), Tape & Reel (TR), and Bulk packaging formats. All maintain the same through-hole DO-204AC (DO-15) axial package footprint. Select packaging based on assembly process requirements and volume needs.

Q: Are all substitute parts ROHS3 compliant?

A: Vishay parts (SA30A-E3/54, SA30AHE3/54) and Littelfuse parts (SA30A-B, SAC30) are explicitly ROHS3 compliant. Micro Commercial Co parts (P5KE30A series, SA30A-TP) do not list RoHS status in the provided specifications. Verify RoHS compliance requirements with your supplier if this is a design constraint.

Q: What is the inventory status for each substitute?

A: SA30A-E3/54 has 12,018 units in stock. SA30AHE3/54 has 1,061 units. P5KE30A-AP has 751 units, P5KE30A-BP has 864 units, and P5KE30A-TP has 810 units. SA30A has 45,100 units. SA30A-B has 866 units. SA30A-TP has 820 units. SAC30 has 1,799 units. Verify current availability with your component supplier.

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