SMBJ7.5-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ7.5-E3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 7.5V reverse standoff voltage class and is designed for general-purpose transient protection applications. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SMBJ7.5-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 976SMBJ7.5-E3/52 Datasheet

Current PartRFQ

SMBJ7.5A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 1938SMBJ7.5A-E3/52 Datasheet

DirectRFQ

SMBJ7.5E3/TR13

Microchip TechnologyIn Stock: 1139SMBJ7.5E3/TR13 Datasheet

DirectRFQ

SMBJ7.5A

MDDIn Stock: 22756SMBJ7.5A Datasheet

MFR RecommendedRFQ

SMBJ7.5A-13-F

Diodes IncorporatedIn Stock: 24157SMBJ7.5A-13-F Datasheet

MFR RecommendedRFQ

SMBJ7.5AE3/TR13

Microchip TechnologyIn Stock: 4389SMBJ7.5AE3/TR13 Datasheet

MFR RecommendedRFQ

SMBJ7V5A

Taiwan Semiconductor CorporationIn Stock: 21444SMBJ7V5A Datasheet

MFR RecommendedRFQ

SZ1SMB7.5AT3G

Littelfuse Inc.In Stock: 10810SZ1SMB7.5AT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ7.5-E3/52 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Reverse Standoff Voltage: 7.5V (Typ)
• Breakdown Voltage (Min): 8.33V
• Unidirectional Channel Configuration: 1 channel
• Package Type: DO-214AA / SMB surface mount
• Operating Temperature Range: Minimum -55°C to 150°C
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

Secondary Compatibility Factors:

• Clamping Voltage @ Ipp: 14.3V (original specification)
• Peak Pulse Current: 42A (original specification)
• Peak Pulse Power: 600W

Substitute parts are grouped into two categories based on clamping voltage performance:

Group A - Matched Clamping Voltage (14.3V): Parts maintaining the original 14.3V clamping specification with 42A peak pulse current.

Group B - Alternative Clamping Voltage (12.9V): Parts with reduced clamping voltage of 12.9V but increased peak pulse current capability (46.5A - 46.6A), offering improved transient suppression performance within the same voltage class and package footprint.

All substitute parts maintain the 7.5V reverse standoff voltage, 8.33V minimum breakdown voltage, and DO-214AA/SMB package compatibility required for direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

For Direct Electrical Equivalence (Matched Clamping Voltage):

SMBJ7.5E3/TR13 (Microchip Technology) provides the closest electrical match to the SMBJ7.5-E3/52, maintaining the 14.3V clamping voltage and 42A peak pulse current specifications. This part is active in production and offers an extended operating temperature range of -65°C to 150°C, providing additional thermal margin. RoHS3 compliance and MSL 1 rating are maintained.

For Enhanced Performance (Improved Transient Suppression):

SMBJ7.5A-13-F (Diodes Incorporated), SMBJ7.5AE3/TR13 (Microchip Technology), SMBJ7V5A (Taiwan Semiconductor Corporation), and SZ1SMB7.5AT3G (Littelfuse Inc.) offer reduced clamping voltage (12.9V) with increased peak pulse current (46.5A - 46.6A). These parts provide superior transient suppression capability within the same voltage class and package footprint. All maintain RoHS3 compliance and MSL 1 rating. SMBJ7.5AE3/TR13 and SZ1SMB7.5AT3G offer extended temperature range to -65°C.

For Vishay Continuity:

SMBJ7.5A-E3/52 (Vishay General Semiconductor - Diodes Division) maintains manufacturer continuity while offering improved performance characteristics with 12.9V clamping and 46.5A peak pulse current. This part is active and fully compliant with RoHS3 and MSL 1 requirements.

All recommended substitutes are active production parts with established supply chains and are fully compatible with the original DO-214AA/SMB package footprint.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with 12.9V clamping voltage instead of 14.3V?

A: Yes. The 12.9V clamping voltage represents improved transient suppression performance. Both specifications operate within the same 7.5V reverse standoff voltage class and 8.33V minimum breakdown voltage. The lower clamping voltage provides faster voltage suppression with higher peak pulse current capability (46.5A vs. 42A), making these parts functionally superior for transient protection applications.

Q: Are all substitute parts compatible with the original PCB layout?

A: Yes. All substitute parts use the DO-214AA/SMB package with identical footprint and pin configuration. Direct board-level replacement is possible without PCB modifications.

Q: What is the difference between the Microchip SMBJ7.5E3/TR13 and SMBJ7.5AE3/TR13?

A: Both are Microchip products in the same package. SMBJ7.5E3/TR13 maintains the original 14.3V clamping voltage with 42A peak pulse current. SMBJ7.5AE3/TR13 offers improved performance with 12.9V clamping voltage and 46.5A peak pulse current. Both support the extended -65°C to 150°C operating temperature range.

Q: Does the SZ1SMB7.5AT3G have any additional qualifications?

A: SZ1SMB7.5AT3G is qualified to AEC-Q101 automotive standards and carries an automotive grade designation. It maintains the same electrical specifications as other 12.9V clamping alternatives (46.5A peak pulse current) with extended -65°C to 150°C operating temperature range.

Q: Which substitute offers the best supply availability?

A: SMBJ7.5A (MDD) has the highest documented inventory at 22,713 pieces. SMBJ7.5A-13-F (Diodes Incorporated) and SMBJ7V5A (Taiwan Semiconductor Corporation) also maintain substantial stock levels above 20,000 pieces.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original SMBJ7.5-E3/52 compliance profile.