SA24C-E3/54 Equivalent & Substitute Parts

Part Overview

The SA24C-E3/54 is a 24V Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, housed in a DO-204AC (DO-15) axial through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a temperature range of -55°C to 175°C and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	24V
Voltage - Breakdown (Min)	26.7V
Voltage - Clamping (Max) @ Ipp	43V
Current - Peak Pulse (10/1000µs)	11.6A
Power - Peak Pulse	500W
Operating Temperature Range	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Type	Zener
Bidirectional Channels	1
Applications	General Purpose

Substitute Part Grouping Explanation

Substitution for the SA24C-E3/54 is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 24V
Voltage - Breakdown (Min): 26.7V
Voltage - Clamping (Max) @ Ipp: Must accommodate circuit protection requirements
Current - Peak Pulse (10/1000µs): Minimum 11.6A
Power - Peak Pulse: 500W
Package / Case: DO-204AC, DO-15, Axial (through-hole)
Operating Temperature Range: -55°C ~ 175°C
Type: Zener, Bidirectional, Single Channel

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (Vishay): SA24CA-E3/54 maintains identical electrical specifications with improved clamping voltage (38.9V) and higher peak pulse current (12.9A), offering enhanced performance within the same product family.

Cross-Manufacturer Alternatives: P5KE24CA series (Micro Commercial Co) and SA24CA variants provide functionally equivalent protection with comparable electrical characteristics and extended temperature ranges in certain configurations.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Product Status
SA24C-E3/54	Vishay General Semiconductor	24V	26.7V	43V	11.6A	500W	-55°C ~ 175°C	DO-204AC (DO-15)	Obsolete
SA24CA-E3/54	Vishay General Semiconductor	24V	26.7V	38.9V	12.9A	500W	-55°C ~ 175°C	DO-204AC (DO-15)	Active
P5KE24CA-AP	Micro Commercial Co	24V	26.7V	38.9V	12.8A	500W	-65°C ~ 175°C	DO-15	Active
P5KE24CA-BP	Micro Commercial Co	24V	26.7V	38.9V	12.8A	500W	-65°C ~ 175°C	DO-15	Active
P5KE24CA-TP	Micro Commercial Co	24V	26.7V	38.9V	12.8A	500W	-65°C ~ 175°C	DO-15	Active
SA24CA	Fairchild Semiconductor	24V	26.7V	38.9V	13.1A	500W	-55°C ~ 175°C	DO-204AC (DO-15)	Obsolete
SA24CA-AP	Micro Commercial Co	24V	26.7V	38.9V	13.1A	500W	-55°C ~ 175°C	DO-15	Active
SA24CA-BP	Micro Commercial Co	24V	26.7V	38.9V	13.1A	500W	-55°C ~ 175°C	DO-15	Active
SA24CA-TP	Micro Commercial Co	24V	26.7V	38.9V	13.1A	500W	-55°C ~ 175°C	DO-15	Active

Engineering Selection Recommendations

Primary Recommendation: SA24CA-E3/54 (Vishay General Semiconductor) is the direct successor to the SA24C-E3/54. Both parts maintain identical reverse standoff voltage (24V) and breakdown voltage (26.7V), with SA24CA-E3/54 offering improved clamping performance (38.9V vs 43V) and higher peak pulse current (12.9A vs 11.6A). This part is currently in active production status and maintains ROHS3 compliance with the same operating temperature range (-55°C ~ 175°C).

Secondary Recommendations: P5KE24CA series (Micro Commercial Co) parts provide functionally equivalent 24V TVS protection with active product status. The P5KE24CA-AP, P5KE24CA-BP, and P5KE24CA-TP variants are electrically interchangeable, each delivering 12.8A peak pulse current at 38.9V clamping voltage. These parts extend the lower operating temperature limit to -65°C, providing enhanced cold-temperature performance. All three variants are ROHS3 compliant and maintain 500W peak pulse power rating.

Alternative Options: SA24CA-AP, SA24CA-BP, and SA24CA-TP (Micro Commercial Co) deliver the highest peak pulse current (13.1A) among active substitutes while maintaining identical voltage specifications and operating temperature range to the original part. These variants are suitable for applications requiring maximum current handling within the 24V protection class.

Obsolete Parts to Avoid: SA24CA (Fairchild Semiconductor) is classified as obsolete and should not be selected for new designs despite electrical equivalence.

Frequently Asked Questions (FAQ)

Q: Can SA24CA-E3/54 directly replace SA24C-E3/54 in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (24V), breakdown voltage (26.7V), and operating temperature range (-55°C ~ 175°C). The SA24CA-E3/54 provides improved clamping voltage (38.9V) and higher peak pulse current (12.9A), making it a superior direct replacement. No circuit modifications are required.

Q: What is the difference between P5KE24CA-AP, P5KE24CA-BP, and P5KE24CA-TP?

A: These three Micro Commercial Co variants are electrically identical, each rated for 24V reverse standoff, 26.7V breakdown voltage, 38.9V clamping voltage, and 12.8A peak pulse current. The suffix designations (AP, BP, TP) indicate different packaging or tape configurations. All three are suitable for direct substitution based on electrical parameters.

Q: Are there temperature range differences between substitute options?

A: Yes. Vishay parts (SA24C-E3/54, SA24CA-E3/54, SA24CA variants) operate from -55°C to 175°C. Micro Commercial Co P5KE24CA series extends the lower limit to -65°C, providing enhanced cold-temperature performance. For applications requiring operation below -55°C, P5KE24CA series is required.

Q: Does package type affect substitution compatibility?

A: All substitute parts use DO-204AC or DO-15 axial through-hole packages, which are mechanically and electrically compatible. Vishay parts are supplied in DO-204AC (DO-15) configuration, while Micro Commercial Co variants use DO-15 designation. Both designations refer to the same physical package suitable for through-hole PCB mounting.

Q: Which substitute offers the best current handling capability?

A: SA24CA variants (SA24CA, SA24CA-AP, SA24CA-BP, SA24CA-TP) deliver the highest peak pulse current at 13.1A, compared to 12.9A for SA24CA-E3/54 and 12.8A for P5KE24CA series. For applications requiring maximum current capacity within the 24V protection class, SA24CA variants are optimal.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SA24CA-E3/54, SA24CA, and all Micro Commercial Co variants (P5KE24CA and SA24CA series) are ROHS3 compliant. All parts maintain REACH Unaffected status and EAR99 export classification.

Q: What is the inventory status of substitute parts?

A: SA24CA-E3/54 has 9,802 units in stock. P5KE24CA-AP, P5KE24CA-BP, and P5KE24CA-TP have 796, 990, and 1,073 units respectively. SA24CA variants (SA24CA, SA24CA-AP, SA24CA-BP, SA24CA-TP) have 4,552, 1,137, 716, and 882 units in stock respectively. Inventory levels support immediate procurement for production requirements.

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