SMBJ85-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ85-E3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose transient voltage protection in surface-mount applications. This part operates with an 85V reverse standoff voltage and provides 151V maximum clamping voltage at peak pulse current. The SMBJ85-E3/52 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SMBJ85-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 835SMBJ85-E3/52 Datasheet

Current PartRFQ

SMBJ85A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 45289SMBJ85A-E3/52 Datasheet

DirectRFQ

SMBJ85A

MeritekIn Stock: 2164SMBJ85A Datasheet

MFR RecommendedRFQ

SMBJ85A

MeritekIn Stock: 2164SMBJ85A Datasheet

MFR RecommendedRFQ

SMBJ85A

MeritekIn Stock: 2164SMBJ85A Datasheet

MFR RecommendedRFQ

SMBJ85A-13-F

Diodes IncorporatedIn Stock: 4424SMBJ85A-13-F Datasheet

MFR RecommendedRFQ

SMBJ85A-HRA

Littelfuse Inc.In Stock: 750SMBJ85A-HRA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMBJ85-E3/52 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 85V
• Voltage - Breakdown (Min): 94.4V
• Mounting Type: Surface Mount
• Package / Case: DO-214AA, SMB
• Type: Zener, Unidirectional
• Operating Temperature Range: -55°C minimum to 150°C maximum
• RoHS Status: ROHS3 Compliant

Substitute parts must maintain identical reverse standoff voltage, breakdown voltage, and package specifications. Variations in clamping voltage and peak pulse current are acceptable within the same product family, provided the part remains suitable for general-purpose transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain compliance with ROHS3 and REACH requirements. Selection among active alternatives should prioritize product availability and supply chain stability:

SMBJ85A-E3/52 (Vishay) remains the primary direct substitute, maintaining the same manufacturer lineage and offering the highest inventory availability at 45,200 pieces. This part is functionally equivalent with improved specifications in peak pulse current (4.4A vs. 4A) and reduced clamping voltage (137V vs. 151V), both favorable for transient suppression performance.

SMBJ85A-13-F (Diodes Incorporated) and SMBJ85A-HRA (Littelfuse Inc.) provide alternative sources with comparable electrical characteristics and active product status. SMBJ85A-HRA offers extended low-temperature operation to -65°C, suitable for applications requiring enhanced cold-temperature performance.

SMBJ85A (Meritek) is available as a generic equivalent with matching core specifications, though with lower inventory levels.

Frequently Asked Questions (FAQ)

Q: Can SMBJ85A-E3/52 directly replace SMBJ85-E3/52 in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (85V), breakdown voltage (94.4V), and DO-214AA SMB package specifications. The SMBJ85A-E3/52 features improved peak pulse current (4.4A vs. 4A) and lower clamping voltage (137V vs. 151V), making it functionally superior for transient voltage suppression.

Q: What is the difference between SMBJ85A-E3/52 and SMBJ85A-HRA?

A: Both parts maintain identical electrical specifications for reverse standoff and breakdown voltages. SMBJ85A-HRA extends the operating temperature range to -65°C (vs. -55°C minimum for SMBJ85A-E3/52), providing enhanced performance in low-temperature environments. Packaging and RoHS compliance are equivalent.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use the DO-214AA (SMB) surface-mount package. SMBJ85A-E3/52, SMBJ85A-13-F, and SMBJ85A-HRA are supplied in Tape & Reel format. Verify packaging requirements with your procurement specification before finalizing part selection.

Q: Why does SMBJ85A-E3/52 have lower clamping voltage than the original SMBJ85-E3/52?

A: The clamping voltage difference (137V vs. 151V) reflects manufacturing improvements in the SMBJ85A series. Lower clamping voltage provides better transient suppression performance while maintaining the same reverse standoff and breakdown voltage specifications. This is a favorable characteristic for circuit protection.

Q: Which substitute part offers the best supply availability?

A: SMBJ85A-E3/52 (Vishay) provides the highest inventory at 45,200 pieces, followed by SMBJ85A-13-F (Diodes Incorporated) at 4,344 pieces. Both are active products with established supply chains suitable for production requirements.