SMDJ54A-HR Equivalent & Substitute Parts

Part Overview

The SMDJ54A-HR is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 54V reverse standoff voltage and provides 3000W peak pulse power dissipation in a DO-214AB (SMC) package. The part is Active status and ROHS3 compliant, making it suitable for modern electronic designs requiring transient voltage suppression across a wide operating temperature range.

Equivalent and substitute parts are identified based on matching electrical performance parameters, package compatibility, and compliance certifications that enable direct functional replacement in circuit designs.

Substiute Parts

SMDJ54A-HR

Littelfuse Inc.In Stock: 867SMDJ54A-HR Datasheet

Current PartRFQ

SMDJ54A

Alpha & Omega Semiconductor Inc.In Stock: 12133SMDJ54A Datasheet

DirectRFQ

3SMC54A TR13 PBFREE

Central Semiconductor CorpIn Stock: 38823SMC54A TR13 PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMDJ54A-HR are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 54V
• Voltage - Breakdown (Min): 60V
• Voltage - Clamping (Max) @ Ipp: 87.1V
• Current - Peak Pulse (10/1000µs): 34.4A or higher
• Power - Peak Pulse: 3000W
• Package / Case: DO-214AB or SMC
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional
• RoHS Status: ROHS3 Compliant

Two substitute parts meet these criteria and are functionally equivalent for direct replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—SMDJ54A-HR, SMDJ54A, and 3SMC54A TR13 PBFREE—are Active status components with ROHS3 compliance and REACH unaffected status, qualifying them for use in regulated applications.

The SMDJ54A from Alpha & Omega Semiconductor Inc. provides equivalent electrical performance with a marginally higher peak pulse current rating of 34.5A compared to 34.4A. The operating temperature minimum is -55°C versus -65°C for the main part, which may be a consideration in extreme low-temperature environments.

The 3SMC54A TR13 PBFREE from Central Semiconductor Corp matches the main part's electrical specifications and operating temperature range (-65°C ~ 150°C) identically. This part is supplied in Tape & Reel packaging with lead-free designation.

Selection between substitutes depends on availability, packaging requirements, and specific operating temperature constraints of the application.

Frequently Asked Questions (FAQ)

Q: Can SMDJ54A replace SMDJ54A-HR in all applications?

A: Yes, the SMDJ54A provides equivalent electrical performance for transient voltage suppression. The primary difference is the minimum operating temperature of -55°C versus -65°C. Applications operating above -55°C will experience no functional difference.

Q: What is the significance of the "TR13 PBFREE" designation in 3SMC54A TR13 PBFREE?

A: TR13 indicates Tape & Reel packaging format with 13mm tape width. PBFREE designates lead-free construction, compliant with RoHS directives. This part is suitable for automated assembly processes requiring lead-free components.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the DO-214AB (SMC) surface-mount package with identical pinout and footprint, enabling direct PCB-level substitution without layout modifications.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification with identical HTSUS codes (8541.10.0080).

Q: What is the difference in peak pulse current between the main part and SMDJ54A?

A: The SMDJ54A is rated for 34.5A peak pulse current compared to 34.4A for SMDJ54A-HR. This 0.1A difference is negligible for most circuit applications and does not affect substitution suitability.

Q: Can these parts be used interchangeably in production?

A: Yes, provided the application's minimum operating temperature requirement does not exceed -55°C. All parts share identical voltage ratings, power dissipation, package specifications, and compliance certifications.