SA24ARLG Equivalent & Substitute Parts

Part Overview

The SA24ARLG is a 24V Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in through-hole applications. This part features a 24V reverse standoff voltage, 38.9V maximum clamping voltage, and 12.8A peak pulse current capability in a DO-204AC (DO-15) axial package. The SA24ARLG is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SA24ARLG

Littelfuse Inc.In Stock: 845SA24ARLG Datasheet

Current PartRFQ

SA24A

Fairchild SemiconductorIn Stock: 1579SA24A Datasheet

DirectRFQ

P5KE24A-AP

Micro Commercial CoIn Stock: 1040P5KE24A-AP Datasheet

MFR RecommendedRFQ

P5KE24A-BP

Micro Commercial CoIn Stock: 973P5KE24A-BP Datasheet

MFR RecommendedRFQ

P5KE24A-TP

Micro Commercial CoIn Stock: 1208P5KE24A-TP Datasheet

MFR RecommendedRFQ

SA24A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1427SA24A-E3/54 Datasheet

MFR RecommendedRFQ

SA24AHE3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1079SA24AHE3/54 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SA24ARLG are qualified based on the following critical parameters that must remain constant across all equivalent devices:

• Voltage - Reverse Standoff: 24V
• Voltage - Breakdown (Min): 26.7V
• Voltage - Clamping (Max) @ Ipp: 38.9V
• Current - Peak Pulse (10/1000µs): 12.8A ± tolerance
• Power - Peak Pulse: 500W
• Package / Case: DO-204AC, DO-15, Axial
• Mounting Type: Through Hole
• Type: Zener, Unidirectional

All identified substitutes maintain these electrical and mechanical specifications, ensuring direct functional equivalence in circuit applications. Variations in peak pulse current (12.8A to 13.1A) remain within acceptable tolerance for this device category.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the SA24ARLG, the following selection criteria apply:

Active Product Status Priority: P5KE24A-AP, P5KE24A-BP, P5KE24A-TP (Micro Commercial Co), SA24A-E3/54, and SA24AHE3/54 (Vishay) are all active products with ongoing manufacturing support and availability. These are preferred for new designs and long-term procurement.

Temperature Range Consideration: The SA24ARLG operates to 150°C maximum junction temperature. All substitute parts extend to 175°C or higher, providing enhanced thermal margin. For applications operating near the original 150°C limit, this extended range offers improved reliability.

Compliance and Certification: All substitute parts maintain ROHS3 compliance where specified. SA24AHE3/54 includes AEC-Q101 automotive qualification, suitable for automotive-grade applications requiring this certification.

Packaging Variants: Micro Commercial Co P5KE24A series (AP, BP, TP) differ only in packaging format (tape reel variants). Vishay SA24A-E3/54 is supplied in Cut Tape; SA24AHE3/54 is supplied in Tape & Reel. Select based on procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SA24ARLG with any of these substitute parts?

A: Yes. All listed substitutes maintain identical electrical specifications (24V standoff, 38.9V clamping, 12.8A-13.1A peak pulse current) and the same DO-204AC (DO-15) axial through-hole package. Direct pin-for-pin substitution is supported.

Q: What is the difference between P5KE24A-AP, P5KE24A-BP, and P5KE24A-TP?

A: These three Micro Commercial Co parts are electrically identical. The suffix designates packaging format: AP, BP, and TP represent different tape reel configurations. Select based on your assembly equipment and procurement preferences.

Q: Why do some substitutes have higher peak pulse current ratings (13.1A vs 12.8A)?

A: The SA24A from Fairchild Semiconductor specifies 13.1A peak pulse current while maintaining the same 38.9V clamping voltage. This represents a tighter manufacturing tolerance or slightly improved performance within the same voltage class. Both values are functionally equivalent for circuit protection purposes.

Q: Is SA24AHE3/54 suitable for automotive applications?

A: SA24AHE3/54 carries AEC-Q101 automotive qualification. If your application requires automotive-grade components, this part meets that requirement. Other substitutes are not specified with automotive qualification.

Q: What is the temperature operating range difference, and does it matter?

A: The SA24ARLG operates to -55°C to 150°C. Substitute parts extend to -55°C to 175°C (Vishay) or -65°C to 175°C (Micro Commercial Co). The extended upper temperature limit provides additional thermal margin. If your circuit operates below 150°C junction temperature, this difference is not critical.

Q: Are all substitutes RoHS3 compliant?

A: SA24A, SA24A-E3/54, and SA24AHE3/54 are explicitly RoHS3 compliant. Micro Commercial Co P5KE24A series parts do not specify RoHS status in the provided data. Verify RoHS compliance with the supplier if this is a requirement for your application.

Q: Can I use these parts interchangeably in existing designs?

A: Yes. All substitutes are electrically and mechanically equivalent to the SA24ARLG. No circuit redesign or PCB modification is required. Substitution is a direct component swap.