SA24A-E3/73 Equivalent & Substitute Parts

Part Overview

The SA24A-E3/73 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This through-hole component operates with a 24V reverse standoff voltage and provides 38.9V maximum clamping voltage at peak pulse current. The device is designed for general-purpose transient voltage suppression applications and is currently in active product status with 32,100 units in stock.

Substitute parts become necessary when the primary component reaches end-of-life status, inventory constraints occur, or when equivalent performance specifications are required from alternative manufacturers while maintaining circuit functionality and reliability.

Substiute Parts

SA24A-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 32134SA24A-E3/73 Datasheet

Current PartRFQ

SA24A

Fairchild SemiconductorIn Stock: 1579SA24A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA24A-E3/73 is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 24V (nominal operating threshold)
• Voltage - Breakdown (Min): 26.7V (minimum trigger point)
• Voltage - Clamping (Max) @ Ipp: 38.9V (maximum transient suppression level)
• Current - Peak Pulse (10/1000µs): 12.9A minimum (surge handling capacity)
• Power - Peak Pulse: 500W (energy dissipation capability)
• Package / Case: DO-204AC (DO-15) axial through-hole (mechanical and electrical interface)
• Operating Temperature Range: -55°C to 175°C (thermal operating envelope)
• Type: Zener unidirectional (functional topology)

The SA24A manufactured by Fairchild Semiconductor meets all specified electrical and mechanical parameters and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The SA24A manufactured by Fairchild Semiconductor is a direct electrical and mechanical substitute for the SA24A-E3/73. Both components maintain identical voltage suppression characteristics, thermal operating range, and package configuration.

The primary distinction is product status: the Vishay SA24A-E3/73 maintains active status with substantial inventory availability (32,100 units), while the Fairchild SA24A is classified as obsolete with limited stock (1,530 units). Both components carry ROHS3 compliance and equivalent regulatory certifications (ECCN: EAR99, HTSUS: 8541.10.0080).

For new designs and applications requiring long-term component availability, the Vishay SA24A-E3/73 is the preferred selection. The Fairchild SA24A serves as a viable substitute only when the primary component is unavailable or when existing inventory must be utilized.

Frequently Asked Questions (FAQ)

Q: Can the SA24A (Fairchild) be used as a direct replacement for the SA24A-E3/73 (Vishay)?

A: Yes. Both components share identical electrical specifications across all critical parameters: 24V reverse standoff voltage, 26.7V minimum breakdown voltage, 38.9V maximum clamping voltage, 500W peak pulse power, and -55°C to 175°C operating temperature range. The DO-204AC (DO-15) axial through-hole package is identical, enabling direct pin-for-pin substitution.

Q: What is the difference in peak pulse current between these parts?

A: The Fairchild SA24A specifies 13.1A peak pulse current compared to 12.9A for the Vishay SA24A-E3/73. This 0.2A difference represents a higher current capacity in the Fairchild device, making it compatible for applications designed around the Vishay specification.

Q: Are there any compliance or certification differences?

A: Both components carry identical regulatory compliance: ROHS3 compliant, ECCN EAR99, and HTSUS 8541.10.0080. Moisture sensitivity level (MSL) is 1 (Unlimited) for the Vishay device. No compliance barriers exist for substitution.

Q: Why is the Fairchild SA24A listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production. However, the component remains functionally equivalent and available through existing inventory channels. Obsolete status does not affect electrical performance or substitution viability.

Q: What mounting considerations apply to these through-hole components?

A: Both parts use identical DO-204AC (DO-15) axial through-hole packaging. No PCB layout modifications, lead spacing adjustments, or mounting procedure changes are required when substituting between these components.