SMDJ75A-HRA Equivalent & Substitute Parts

Part Overview

The SMDJ75A-HRA 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 75V reverse standoff voltage and provides 3000W peak pulse power dissipation in a DO-214AB (SMC) package. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity while maintaining identical electrical and mechanical specifications.

Substiute Parts

SMDJ75A-HRA

Littelfuse Inc.In Stock: 913SMDJ75A-HRA Datasheet

Current PartRFQ

SMDJ75A

Alpha & Omega Semiconductor Inc.In Stock: 1303SMDJ75A Datasheet

DirectRFQ

3SMC75A TR13 PBFREE

Central Semiconductor CorpIn Stock: 30113SMC75A TR13 PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMDJ75A-HRA are qualified based on the following critical parameters that determine functional equivalence:

• Voltage - Reverse Standoff: 75V (exact match required)
• Voltage - Clamping (Max) @ Ipp: 121V (exact match required)
• Current - Peak Pulse (10/1000µs): 24.8A (exact match required)
• Power - Peak Pulse: 3000W (exact match required)
• Type: Unidirectional Zener diode (exact match required)
• Package / Case: DO-214AB or SMC (mechanically compatible)
• Mounting Type: Surface Mount (exact match required)
• RoHS3 Compliance: Required for regulatory equivalence

All identified substitute parts meet these criteria and are therefore electrically and mechanically interchangeable with the SMDJ75A-HRA in applications requiring 75V TVS protection with 3kW peak pulse capability.

Parameter Comparison

Engineering Selection Recommendations

All three parts listed are active products with ROHS3 compliance and are electrically equivalent for 75V transient voltage suppression applications. Selection among these parts should be based on:

Littelfuse SMDJ75A-HRA: Established primary manufacturer with full specification documentation. Operating temperature range of -65°C to 150°C and MSL rating of 1 (Unlimited) support demanding environmental conditions.

Alpha & Omega SMDJ75A: Functionally equivalent with identical electrical parameters. Operating temperature range of -55°C to 150°C is suitable for most commercial and industrial applications. MSL rating not specified in available data.

Central Semiconductor 3SMC75A TR13 PBFREE: Functionally equivalent with identical electrical parameters and operating temperature range of -65°C to 150°C. MSL rating of 1 (Unlimited) matches primary manufacturer specifications. Lead-free designation (PBFREE) explicitly confirmed.

All parts are suitable for direct substitution in applications requiring 75V TVS protection with 3kW peak pulse dissipation in surface-mount DO-214AB/SMC packages.

Frequently Asked Questions (FAQ)

Q: Can SMDJ75A (Alpha & Omega) be used as a direct replacement for SMDJ75A-HRA (Littelfuse)?

A: Yes. Both parts share identical electrical specifications: 75V reverse standoff, 121V clamping voltage, 24.8A peak pulse current, and 3000W peak pulse power. Both are ROHS3 compliant and use the same DO-214AB/SMC surface-mount package. The operating temperature range difference (-55°C to 150°C vs. -65°C to 150°C) is not a functional limitation for most applications.

Q: What is the difference between DO-214AB and SMC package designations?

A: DO-214AB and SMC refer to the same physical package format for surface-mount diodes. These designations are used interchangeably by different manufacturers. All three parts in this comparison use this identical package.

Q: Are there any compliance or certification differences between these parts?

A: All three parts are ROHS3 compliant and carry EAR99 ECCN classification. The HTSUS code is identical (8541.10.0080). Moisture sensitivity level is specified as 1 (Unlimited) for Littelfuse and Central Semiconductor parts; Alpha & Omega does not provide this specification in available data.

Q: Which part should be selected for high-temperature applications?

A: Littelfuse SMDJ75A-HRA and Central Semiconductor 3SMC75A TR13 PBFREE both support the full -65°C to 150°C operating range. Alpha & Omega SMDJ75A is rated to -55°C minimum, which may be limiting in extreme cold environments.

Q: Is lead-free status important for part selection?

A: Central Semiconductor explicitly designates 3SMC75A TR13 PBFREE as lead-free. All three parts are ROHS3 compliant, which requires lead-free composition. The explicit PBFREE designation in the Central Semiconductor part number provides additional documentation clarity for procurement and compliance verification.