SA22CA Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA22CA is a Zener-type transient voltage suppressor diode manufactured by onsemi, designed for general-purpose overvoltage protection in through-hole applications. The device features a 22V reverse standoff voltage with a 35.5V maximum clamping voltage and 14.1A peak pulse current capability in a DO-15 package. The main part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SA22CA

onsemiIn Stock: 4135SA22CA Datasheet

Current PartRFQ

SA22CA

Fairchild SemiconductorIn Stock: 4199SA22CA Datasheet

DirectRFQ

SA22CA-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 765SA22CA-E3/54 Datasheet

DirectRFQ

SA22CAHE3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1148SA22CAHE3/54 Datasheet

DirectRFQ

P5KE22CA-AP

Micro Commercial CoIn Stock: 1246P5KE22CA-AP Datasheet

SimilarRFQ

P5KE22CA-BP

Micro Commercial CoIn Stock: 1040P5KE22CA-BP Datasheet

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P5KE22CA-TP

Micro Commercial CoIn Stock: 1213P5KE22CA-TP Datasheet

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SA22CA-AP

Micro Commercial CoIn Stock: 694SA22CA-AP Datasheet

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SA22CA-BP

Micro Commercial CoIn Stock: 798SA22CA-BP Datasheet

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SA22CA-TP

Micro Commercial CoIn Stock: 942SA22CA-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA22CA is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 22V
• Voltage - Breakdown (Min): 24.4V
• Voltage - Clamping (Max) @ Ipp: 35.5V
• Current - Peak Pulse (10/1000µs): 14.1A minimum
• Power - Peak Pulse: 500W
• Type: Zener
• Bidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: DO-204AC or DO-15

Substitute parts are categorized as follows:

Direct Equivalents: Parts with identical electrical specifications and compatible packaging that serve as direct replacements.

Similar Parts: Parts meeting all critical electrical parameters but from alternative manufacturers with potentially different product status or packaging options.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Status Requirements:

The Vishay SA22CA-E3/54 and SA22CAHE3/54 are active products suitable for new designs. The SA22CAHE3/54 includes AEC-Q101 automotive qualification, making it appropriate for automotive applications requiring formal qualification documentation.

For General Commercial Applications:

Micro Commercial Co variants (SA22CA-AP, SA22CA-BP, SA22CA-TP, P5KE22CA-AP, P5KE22CA-BP, P5KE22CA-TP) are active products with REACH compliance and meet all electrical specifications. These parts are available in bulk packaging and support ongoing procurement.

For Obsolete Part Replacement:

The Fairchild Semiconductor SA22CA provides direct electrical equivalence to the original onsemi part with ROHS3 compliance, though it is also classified as obsolete. This option is suitable only for legacy system maintenance where active product sourcing is not feasible.

For Compliance-Critical Applications:

Select SA22CAHE3/54 when AEC-Q101 qualification is required. This part maintains identical electrical performance while providing automotive-grade reliability documentation.

Frequently Asked Questions (FAQ)

Q: Can SA22CA-E3/54 directly replace the original onsemi SA22CA?

A: Yes. The SA22CA-E3/54 from Vishay meets all critical electrical parameters: 22V standoff voltage, 24.4V minimum breakdown voltage, 35.5V clamping voltage, and 14.1A peak pulse current. Both use DO-204AC (DO-15) packaging. The primary difference is product status—SA22CA-E3/54 is active, while the original is obsolete.

Q: What is the difference between SA22CA-E3/54 and SA22CAHE3/54?

A: Both parts are electrically identical and use the same DO-204AC (DO-15) package. The SA22CAHE3/54 includes AEC-Q101 automotive qualification and is designated for automotive applications. Select SA22CAHE3/54 if automotive compliance documentation is required.

Q: Are Micro Commercial Co variants (SA22CA-AP, SA22CA-BP, SA22CA-TP) suitable replacements?

A: Yes. These parts meet all electrical specifications with peak pulse currents of 14.4A, which exceeds the 14.1A requirement. They are active products available in bulk packaging. Operating temperature range is -55°C to 175°C, matching the original specification.

Q: What is the difference between SA22CA and P5KE22CA variants?

A: Both series meet identical electrical specifications for the 22V rating. The P5KE series represents an alternative product line from Micro Commercial Co. Selection between series is based on availability and procurement preference, as electrical performance is equivalent.

Q: Can I use parts with 14.4A peak pulse current instead of 14.1A?

A: Yes. A higher peak pulse current rating (14.4A) is compatible with applications designed for 14.1A, as it provides additional margin. The clamping voltage and all other critical parameters remain identical.

Q: Are all substitute parts RoHS compliant?

A: The Vishay parts (SA22CA-E3/54, SA22CAHE3/54) are ROHS3 compliant. Micro Commercial Co variants and the Fairchild part are REACH Unaffected. Verify specific compliance requirements for your application before selection.

Q: What packaging options are available?

A: All substitute parts use DO-204AC or DO-15 axial through-hole packaging, maintaining mechanical compatibility with the original SA22CA. Vishay parts are supplied in Tape & Reel (TR) packaging, while Micro Commercial Co and Fairchild variants are available in bulk packaging.