SA24C-E3/73 Equivalent & Substitute Parts

Part Overview

The SA24C-E3/73 is a Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This through-hole component operates with a 24V reverse standoff voltage and provides 43V maximum clamping voltage at peak pulse current. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SA24C-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 1030SA24C-E3/73 Datasheet

Current PartRFQ

SA24CA-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 32356SA24CA-E3/73 Datasheet

DirectRFQ

SA24CA

Fairchild SemiconductorIn Stock: 4653SA24CA Datasheet

MFR RecommendedRFQ

SA24CA-AP

Micro Commercial CoIn Stock: 1173SA24CA-AP Datasheet

MFR RecommendedRFQ

SA24CA-BP

Micro Commercial CoIn Stock: 793SA24CA-BP Datasheet

MFR RecommendedRFQ

SA24CA-TP

Micro Commercial CoIn Stock: 975SA24CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SA24C-E3/73 is determined by the following critical parameters:

• Reverse Standoff Voltage: Must be 24V (Typ)
• Breakdown Voltage: Must be 26.7V (Min)
• Package/Case: Must be DO-204AC (DO-15), Axial
• Mounting Type: Must be Through Hole
• Bidirectional Channels: Must be 1
• Type: Must be Zener
• Operating Temperature Range: Must support -55°C to 175°C (TJ)
• Peak Pulse Power: Must be 500W

Substitute parts are grouped into two categories: direct manufacturer equivalents from Vishay and cross-manufacturer alternatives that maintain electrical and mechanical compatibility within the specified parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

SA24CA-E3/73 (Vishay) is the primary substitute. This part maintains active product status with Vishay, ensuring long-term availability and supply chain stability. It shares identical electrical specifications with the main part except for reduced clamping voltage (38.9V vs. 43V) and increased peak pulse current (12.9A vs. 11.6A), both within acceptable operating margins for the 24V standoff class. RoHS3 compliance is maintained.

SA24CA-AP, SA24CA-BP, and SA24CA-TP (Micro Commercial Co) are alternative substitutes with active product status. These parts provide identical electrical performance to SA24CA-E3/73 with marginally higher peak pulse current (13.1A). All three variants are available in bulk packaging and maintain through-hole DO-15 compatibility. Compliance certifications are not specified for these variants.

SA24CA (Fairchild) is an obsolete cross-manufacturer equivalent. While electrically compatible, its obsolete status limits its suitability for new designs requiring long-term component availability.

Frequently Asked Questions (FAQ)

Q: Can SA24CA-E3/73 directly replace SA24C-E3/73?

A: Yes. Both parts share identical reverse standoff voltage (24V), breakdown voltage (26.7V), operating temperature range (-55°C to 175°C), package type (DO-204AC/DO-15), and mounting configuration (through-hole). The clamping voltage difference (38.9V vs. 43V) and peak pulse current increase (12.9A vs. 11.6A) are within the electrical operating envelope for 24V TVS applications.

Q: What is the difference between SA24CA-E3/73, SA24CA-AP, SA24CA-BP, and SA24CA-TP?

A: All four parts are electrically equivalent with identical standoff voltage, breakdown voltage, clamping voltage, and operating temperature range. The differences are manufacturer (Vishay vs. Micro Commercial Co) and packaging designation (E3/73 tape-and-reel vs. AP/BP/TP bulk variants). Selection depends on procurement requirements and packaging preferences.

Q: Are the Micro Commercial Co variants (SA24CA-AP, SA24CA-BP, SA24CA-TP) suitable for production use?

A: Yes, all three variants maintain active product status and are available in production quantities. They provide identical electrical performance to the Vishay SA24CA-E3/73. Verify compliance certifications with your supplier if RoHS or other regulatory requirements apply to your application.

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

A: The substitute parts (SA24CA series) are rated at 38.9V maximum clamping voltage compared to 43V for the SA24C-E3/73. Both maintain the same 24V reverse standoff voltage and 26.7V minimum breakdown voltage. The lower clamping voltage in the SA24CA series reflects manufacturing tolerance variations within the same device class and does not affect compatibility for 24V transient suppression applications.

Q: Can I use SA24CA (Fairchild) in a new design?

A: SA24CA is classified as obsolete. While electrically compatible, its obsolete status creates supply chain risk. For new designs, use SA24CA-E3/73 (Vishay, active) or the Micro Commercial Co variants (SA24CA-AP, SA24CA-BP, SA24CA-TP, all active) to ensure long-term availability.

Q: Are all substitute parts available in DO-204AC packaging?

A: SA24CA-E3/73 (Vishay) is available in DO-204AC (DO-15) packaging. The Micro Commercial Co variants (SA24CA-AP, SA24CA-BP, SA24CA-TP) are specified for DO-15 packaging. Verify exact package availability with your component supplier if DO-204AC designation is required for your PCB design.