SMCJ24A-HRA Equivalent & Substitute Parts

Part Overview

The SMCJ24A-HRA is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This surface-mount component operates with a 24V reverse standoff voltage and provides 38.9V clamping at peak pulse current. The part is Active status and RoHS3 compliant, making it suitable for modern electronic designs requiring transient suppression in industrial and commercial applications.

Substitute parts are necessary when the primary manufacturer part becomes unavailable, when alternative packaging formats are required for production optimization, or when design flexibility demands component sourcing from multiple qualified suppliers.

Substiute Parts

SMCJ24A-HRA

LittelfuseIn Stock: 1178SMCJ24A-HRA Datasheet

Current PartRFQ

SMCJ24A

EVVO SemiIn Stock: 955149SMCJ24A Datasheet

DirectRFQ

SMCJ24A

EVVO SemiIn Stock: 955149SMCJ24A Datasheet

DirectRFQ

SMCJ24A-13-F

Diodes IncorporatedIn Stock: 7832SMCJ24A-13-F Datasheet

DirectRFQ

SMCJ24A-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 28650SMCJ24A-E3/57T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMCJ24A-HRA is determined by strict electrical and mechanical parameter matching:

Critical Electrical Parameters (Must Match):

• Voltage - Reverse Standoff: 24V
• Voltage - Breakdown (Min): 26.7V
• Voltage - Clamping (Max) @ Ipp: 38.9V
• Current - Peak Pulse (10/1000µs): 38.6A
• Type: Zener, Unidirectional (1 channel)

Acceptable Mechanical Variations:

• Package / Case: DO-214AB (SMC) or DO-214AC (SMA) — both are surface-mount packages compatible with standard pick-and-place equipment
• Packaging Format: Tape & Reel (TR), Cut Tape (CT), or Digi-Reel® — production format variations that do not affect component function

Compliance Requirements:

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• Active product status

All substitute parts listed maintain identical electrical performance specifications and regulatory compliance with the primary part.

Parameter Comparison

Engineering Selection Recommendations

SMCJ24A (EVVO Semi): This substitute maintains all critical electrical parameters and RoHS3 compliance. The primary distinction is reduced peak pulse power rating (600W versus 1500W) and package format variation (DO-214AC/SMA versus DO-214AB/SMC). Selection of this part requires verification that the 600W power dissipation rating is sufficient for the intended application. The SMA package is mechanically compatible with standard surface-mount assembly processes.

SMCJ24A-13-F (Diodes Incorporated): This substitute provides identical electrical performance and peak pulse power rating (1500W) with DO-214AB/SMC packaging matching the primary part. Operating temperature range is -55°C to 150°C, which is narrower than the primary part's -65°C to 150°C range. Selection is appropriate for applications where the lower temperature limit of -55°C is acceptable.

SMCJ24A-E3/57T (Vishay General Semiconductor - Diodes Division): This substitute delivers identical electrical specifications and peak pulse power rating (1500W) with DO-214AB/SMC packaging. Operating temperature range is -55°C to 150°C. This part is part of the TransZorb® series and maintains full RoHS3 and REACH compliance. Selection is appropriate where the -55°C lower temperature limit meets application requirements.

All substitute parts are Active status and carry RoHS3 compliance certification, confirming regulatory alignment with modern manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can SMCJ24A (EVVO Semi) be used as a direct replacement for SMCJ24A-HRA?

A: Electrical substitution is valid for all critical parameters (24V standoff, 26.7V breakdown, 38.9V clamping, 38.6A peak pulse). However, the reduced peak pulse power rating (600W versus 1500W) requires application-level verification. The SMA package (DO-214AC) differs from the SMC package (DO-214AB), though both are surface-mount formats compatible with standard assembly equipment. Mechanical fit and thermal management characteristics may differ.

Q: What is the difference between DO-214AB (SMC) and DO-214AC (SMA) packages?

A: Both are surface-mount diode packages. DO-214AB (SMC) and DO-214AC (SMA) have different physical dimensions and thermal characteristics. Component placement and PCB footprint design must accommodate the specific package selected. Consult package datasheets for precise dimensional specifications.

Q: Are the operating temperature ranges interchangeable?

A: The primary part operates from -65°C to 150°C. SMCJ24A (EVVO Semi) matches this range. SMCJ24A-13-F and SMCJ24A-E3/57T operate from -55°C to 150°C. Selection depends on whether your application requires operation below -55°C. If the application operates only above -55°C, all parts are functionally equivalent in this parameter.

Q: What does RoHS3 compliance mean for these parts?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitute parts carry RoHS3 certification, confirming regulatory compliance for use in modern electronic equipment.

Q: Can packaging format (Tape & Reel versus Cut Tape) affect component selection?

A: Packaging format affects production logistics and handling but does not alter electrical or mechanical component performance. Tape & Reel (TR) and Cut Tape (CT) formats are both suitable for automated assembly. Selection depends on production volume, equipment compatibility, and inventory management requirements.

Q: What does Moisture Sensitivity Level 1 (Unlimited) indicate?

A: MSL 1 (Unlimited) means the component has no moisture sensitivity restrictions. The part can be stored and handled without special humidity controls or time-limited shelf-life constraints, simplifying inventory management and supply chain logistics.