SA22C-E3/54 Equivalent & Substitute Parts

Part Overview

The SA22C-E3/54 is a transient voltage suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This through-hole component operates as a bidirectional Zener diode for general-purpose transient voltage protection applications. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SA22C-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 826SA22C-E3/54 Datasheet

Current PartRFQ

SA22CA-E3/54

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

DirectRFQ

SA22CA

Fairchild SemiconductorIn Stock: 4199SA22CA Datasheet

MFR RecommendedRFQ

SA22CA-AP

Micro Commercial CoIn Stock: 694SA22CA-AP Datasheet

MFR RecommendedRFQ

SA22CA-BP

Micro Commercial CoIn Stock: 798SA22CA-BP Datasheet

MFR RecommendedRFQ

SA22CA-TP

Micro Commercial CoIn Stock: 942SA22CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SA22C-E3/54 is determined by the following critical parameters that must remain consistent across equivalent parts:

• Voltage - Reverse Standoff: 22V (nominal operating voltage threshold)
• Voltage - Breakdown (Min): 24.4V (trigger point for clamping action)
• Operating Temperature Range: -55°C ~ 175°C (thermal operating envelope)
• Mounting Type: Through Hole (physical installation requirement)
• Package / Case: DO-204AC, DO-15, Axial (form factor compatibility)
• Type: Zener, Bidirectional, Single Channel (functional topology)

Substitute parts may vary in clamping voltage and peak pulse current within acceptable ranges for the application, provided all core parameters remain aligned. The SA22C-E3/54 exhibits a clamping voltage of 39.4V at 22.7A peak pulse current. Substitute parts with lower clamping voltages (such as 35.5V) and correspondingly lower peak pulse currents (14.1A to 14.4A) remain functionally equivalent for general-purpose transient suppression when the application does not require the higher current handling of the original part.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SA22CA-E3/54 (Vishay)

The SA22CA-E3/54 is the direct manufacturer equivalent from Vishay General Semiconductor - Diodes Division. This part maintains identical voltage specifications (22V standoff, 24.4V breakdown) and operating temperature range (-55°C ~ 175°C). The primary difference is a reduced clamping voltage (35.5V vs. 39.4V) and correspondingly lower peak pulse current (14.1A vs. 22.7A). This part carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. Packaging is Tape & Reel (TR), suitable for automated assembly environments.

Secondary Substitutes: SA22CA-AP, SA22CA-BP, SA22CA-TP (Micro Commercial Co)

These three variants from Micro Commercial Co share identical electrical specifications with SA22CA-E3/54 (35.5V clamping, 14.4A peak pulse current). All three maintain the required 22V standoff voltage and -55°C ~ 175°C operating temperature range. All three carry Active product status. Packaging is Bulk (loose components). These parts are suitable for applications where the reduced clamping voltage and peak pulse current are acceptable compared to the original SA22C-E3/54.

Alternative: SA22CA (Fairchild Semiconductor)

The SA22CA from Fairchild Semiconductor provides equivalent electrical performance to the Micro Commercial Co variants (35.5V clamping, 14.4A peak pulse current) with identical voltage specifications. This part is listed as Obsolete, which may limit future procurement availability. Packaging is Bulk. ROHS3 compliance is confirmed.

Selection Criteria:

• For designs requiring the highest current handling capacity and clamping voltage matching the original SA22C-E3/54, no direct equivalent with identical 39.4V clamping and 22.7A current is available among the listed substitutes.
• For applications tolerant of 35.5V clamping voltage and 14.1A to 14.4A peak pulse current, SA22CA-E3/54 is the preferred choice due to Active status and manufacturer continuity with Vishay.
• For high-volume production requiring Tape & Reel packaging, SA22CA-E3/54 is the only listed option.
• For bulk component procurement, SA22CA-AP, SA22CA-BP, or SA22CA-TP from Micro Commercial Co provide Active alternatives with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SA22CA-E3/54 directly replace SA22C-E3/54 in my circuit?

A: SA22CA-E3/54 maintains all critical voltage parameters (22V standoff, 24.4V breakdown) and operating temperature range required for functional equivalence. The reduced clamping voltage (35.5V vs. 39.4V) and peak pulse current (14.1A vs. 22.7A) must be verified against your application's transient suppression requirements. If your circuit design accommodates these lower values, direct substitution is valid.

Q: What is the difference between SA22CA-E3/54 and SA22CA-AP/BP/TP?

A: All four parts share identical electrical specifications (22V standoff, 24.4V breakdown, 35.5V clamping, 14.1A to 14.4A peak pulse current). The primary differences are manufacturer (Vishay vs. Micro Commercial Co) and packaging format (Tape & Reel vs. Bulk). SA22CA-E3/54 is supplied on tape and reel for automated assembly, while SA22CA-AP, SA22CA-BP, and SA22CA-TP are supplied in bulk form.

Q: Why is the clamping voltage lower in the substitute parts?

A: The SA22CA variants represent a different design point within the 22V Zener family. While the standoff and breakdown voltages remain constant at 22V and 24.4V respectively, the clamping voltage and peak pulse current are interdependent characteristics. The 35.5V clamping voltage with 14.1A to 14.4A peak pulse current is the specified performance for these parts. Applications requiring the original 39.4V clamping voltage and 22.7A current handling must evaluate whether the substitute performance is acceptable.

Q: Are all substitute parts RoHS compliant?

A: SA22CA-E3/54 and SA22CA (Fairchild) are confirmed ROHS3 compliant. RoHS compliance status is not specified in the provided data for SA22CA-AP, SA22CA-BP, and SA22CA-TP from Micro Commercial Co. Verify RoHS compliance requirements with your procurement or quality department before selecting these parts.

Q: Which substitute part should I choose for new designs?

A: SA22CA-E3/54 is the recommended choice for new designs due to its Active product status, ROHS3 compliance, and manufacturer continuity with Vishay. This ensures long-term availability and regulatory alignment. Verify that the 35.5V clamping voltage and 14.1A peak pulse current meet your application requirements.

Q: Can I use Fairchild SA22CA as a substitute?

A: SA22CA from Fairchild Semiconductor provides equivalent electrical performance to the Micro Commercial Co variants. However, this part carries Obsolete status, which may limit future procurement availability. It is suitable for replacement in existing designs but not recommended for new designs.

Q: What is the difference between Tape & Reel and Bulk packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for automated pick-and-place assembly equipment. Bulk packaging supplies loose components, typically used for manual assembly or lower-volume production. SA22CA-E3/54 is supplied on Tape & Reel, while SA22CA-AP, SA22CA-BP, SA22CA-TP, and SA22CA (Fairchild) are supplied in Bulk.