SMBJ36HE3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ36HE3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AA (SMB) package. This component operates with a 36V reverse standoff voltage and provides transient protection with a 64.3V maximum clamping voltage at peak pulse current of 9.3A. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SMBJ36HE3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 903SMBJ36HE3/52 Datasheet

Current PartRFQ

SMBJ36E3/TR13

Microchip TechnologyIn Stock: 856SMBJ36E3/TR13 Datasheet

DirectRFQ

SM6T42AY

STMicroelectronicsIn Stock: 28042SM6T42AY Datasheet

MFR RecommendedRFQ

SMBJ36A

EVVO SemiIn Stock: 122275SMBJ36A Datasheet

MFR RecommendedRFQ

SMBJ36A

EVVO SemiIn Stock: 122275SMBJ36A Datasheet

MFR RecommendedRFQ

SMBJ36A-13-F

Diodes IncorporatedIn Stock: 113275SMBJ36A-13-F Datasheet

MFR RecommendedRFQ

SMBJ36A-HRA

Littelfuse Inc.In Stock: 889SMBJ36A-HRA Datasheet

MFR RecommendedRFQ

SMBJ36A-TP

Micro Commercial CoIn Stock: 3075SMBJ36A-TP Datasheet

MFR RecommendedRFQ

SZ1SMB36AT3G

Littelfuse Inc.In Stock: 9933SZ1SMB36AT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ36HE3/52 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff: 36V (required match)
• Voltage - Breakdown (Min): 40V (required match)
• Unidirectional Channels: 1 (required match)
• Type: Zener (required match)
• Package / Case: DO-214AA, SMB (required match for mechanical compatibility)
• Mounting Type: Surface Mount (required match)
• Power - Peak Pulse: 600W (required match)

Secondary Compatibility Parameters:

• Voltage - Clamping (Max) @ Ipp: Acceptable range 58.1V to 76V (within functional tolerance for transient suppression)
• Current - Peak Pulse: Acceptable range 9.3A to 52A (higher values provide enhanced protection margin)
• Operating Temperature Range: Acceptable if minimum is -55°C or lower and maximum is 150°C or higher
• RoHS and MSL Compliance: ROHS3 Compliant and MSL 1 (required for environmental standards)

Substitute parts are grouped into two categories based on clamping voltage performance: Standard Performance (58.1V clamping) and Enhanced Performance (76V clamping).

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalent (Preferred for Drop-In Replacement):

SMBJ36E3/TR13 (Microchip Technology) is the direct electrical equivalent with identical clamping voltage (64.3V) and peak pulse current (9.3A). This part is active and ROHS3 compliant, making it the primary choice for direct substitution in existing designs.

Standard Performance Alternatives (58.1V Clamping):

SMBJ36A-13-F (Diodes Incorporated), SMBJ36A-HRA (Littelfuse Inc.), SMBJ36A-TP (Micro Commercial Co), and SZ1SMB36AT3G (Littelfuse Inc.) all provide 58.1V clamping with peak pulse currents between 10.3A and 10.4A. These parts are active and ROHS3 compliant. SZ1SMB36AT3G and SM6T42AY carry automotive grade and AEC-Q101 qualification, matching the original part's automotive credentials.

Enhanced Performance Alternative (76V Clamping):

SM6T42AY (STMicroelectronics) offers higher clamping voltage (76V) with significantly increased peak pulse current (52A at 8/20µs). This part is automotive grade with AEC-Q101 qualification. The enhanced performance provides additional transient suppression margin but requires verification that the higher clamping voltage is acceptable for the protected circuit.

Package Consideration:

SMBJ36A (EVVO Semi) uses DO-214AC (SMA) package instead of DO-214AA (SMB), requiring PCB layout modification and is not recommended for direct mechanical substitution.

Frequently Asked Questions (FAQ)

Q: Can SMBJ36A (EVVO Semi) be used as a direct replacement for SMBJ36HE3/52?

A: SMBJ36A matches all electrical parameters (36V standoff, 40V breakdown, 58.1V clamping, 10.4A peak pulse) but uses DO-214AC (SMA) package instead of DO-214AA (SMB). This requires PCB footprint modification and is not a direct mechanical substitute.

Q: What is the difference between SMBJ36E3/TR13 and the other SMBJ36A variants?

A: SMBJ36E3/TR13 maintains the original clamping voltage of 64.3V and peak pulse current of 9.3A, providing electrical equivalence. SMBJ36A variants reduce clamping voltage to 58.1V with slightly higher peak pulse currents (10.3-10.4A), offering different transient response characteristics.

Q: Is SM6T42AY suitable for applications requiring the original 64.3V clamping voltage?

A: SM6T42AY provides 76V clamping, which is higher than the original 64.3V. This part is suitable only if the protected circuit can tolerate higher clamping voltage. The 52A peak pulse current (8/20µs) provides enhanced protection capability.

Q: Do all substitute parts meet automotive qualification requirements?

A: SM6T42AY and SZ1SMB36AT3G carry automotive grade and AEC-Q101 qualification, matching the original part. Other substitutes (SMBJ36E3/TR13, SMBJ36A variants) are active and ROHS3 compliant but lack automotive qualification. Selection depends on application requirements.

Q: What is the impact of operating temperature range differences?

A: SMBJ36A-TP extends the maximum operating temperature to 175°C compared to 150°C for the original part. Multiple substitutes offer extended minimum temperature to -65°C. These differences are acceptable if the application requirements fall within the substitute part's specified range.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: SMBJ36E3/TR13, SMBJ36A-HRA, SMBJ36A-TP, and SZ1SMB36AT3G are available in Tape & Reel packaging. SMBJ36A (EVVO Semi) is available in Cut Tape (CT) & Digi-Reel. Packaging selection depends on assembly process requirements.