SMBJ75C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ75C-E3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 75V reverse standoff voltage and 134V maximum clamping voltage, delivering 4.5A peak pulse current in a DO-214AA (SMB) package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar electrical characteristics.

Substiute Parts

SMBJ75C-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1096SMBJ75C-E3/5B Datasheet

Current PartRFQ

SMBJ75CA-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 6871SMBJ75CA-E3/5B Datasheet

DirectRFQ

SMBJ75CE3/TR13

Microchip TechnologyIn Stock: 1025SMBJ75CE3/TR13 Datasheet

DirectRFQ

SMBJ7.5CA

MDDIn Stock: 45848SMBJ7.5CA Datasheet

MFR RecommendedRFQ

SMBJ75CA

MDDIn Stock: 45399SMBJ75CA Datasheet

MFR RecommendedRFQ

SMBJ75CA

MDDIn Stock: 45399SMBJ75CA Datasheet

MFR RecommendedRFQ

SMBJ75CA

MDDIn Stock: 45399SMBJ75CA Datasheet

MFR RecommendedRFQ

SMBJ75CA-13-F

Diodes IncorporatedIn Stock: 29379SMBJ75CA-13-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMBJ75C-E3/5B is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Reverse standoff voltage: 75V (±tolerance)
• Package type: DO-214AA / SMB surface mount
• Bidirectional channels: 1
• Peak pulse power rating: 600W
• RoHS3 compliance and MSL Level 1

Secondary Compatibility Parameters:

• Voltage clamping range: 121V to 134V maximum
• Peak pulse current: 4.5A to 5.3A
• Operating temperature range: -55°C to -50°C minimum; 150°C maximum
• Type: Zener diode

Substitute parts are grouped into two categories based on electrical performance alignment:

Group 1 - Direct Electrical Match (134V Clamping): Parts maintaining the original 134V clamping voltage specification with 4.5A peak pulse current.

Group 2 - Functional Equivalent (121V Clamping): Parts with reduced clamping voltage (121V) and increased peak pulse current (5.0A to 5.3A), suitable for applications where the lower clamping voltage provides adequate protection margins.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

SMBJ75CE3/TR13 (Microchip Technology) provides the closest electrical match with 134V clamping voltage and 4.5A peak pulse current. This part maintains the original performance envelope and extends the operating temperature range to -65°C minimum. Product status is active with established supply availability.

For Functional Equivalence (Optimized Performance):

SMBJ75CA-E3/5B (Vishay), SMBJ75CA-13-F (Diodes Incorporated), and SMBJ75CA (MDD) operate with 121V clamping voltage and increased peak pulse current (5.0A to 5.3A). These parts are suitable for applications where lower clamping voltage provides adequate protection margins and higher current handling capacity is beneficial. All three maintain ROHS3 compliance and MSL Level 1 certification.

Supply and Compliance Considerations:

All substitute parts carry ROHS3 compliance and MSL Level 1 ratings, matching the original part's environmental and regulatory status. Active product status across all substitutes ensures long-term availability and manufacturing continuity. Selection should prioritize parts with established inventory levels and confirmed active manufacturing status.

Frequently Asked Questions (FAQ)

Q: Can SMBJ75CA-E3/5B replace SMBJ75C-E3/5B directly?

A: Yes. Both parts share identical reverse standoff voltage (75V), breakdown voltage (83.3V), package type (DO-214AA/SMB), and operating temperature range (-55°C to 150°C). The primary difference is clamping voltage: SMBJ75CA-E3/5B clamps at 121V versus 134V on the original. This lower clamping voltage is acceptable in applications where the protection threshold remains within system design margins.

Q: What is the difference between 121V and 134V clamping voltage?

A: Clamping voltage determines the maximum voltage the TVS diode allows across its terminals during a transient event. The 134V specification on SMBJ75C-E3/5B provides a higher voltage threshold before clamping occurs. The 121V specification on substitute parts reduces this threshold by approximately 10%, offering more aggressive protection. Selection depends on the protected circuit's voltage tolerance specifications.

Q: Are all substitute parts available in tape and reel packaging?

A: SMBJ75CA-E3/5B, SMBJ75CE3/TR13, SMBJ75CA-13-F, and SMBJ75CA are available in tape and reel (TR) packaging suitable for automated assembly. Packaging format should be confirmed with the specific supplier before procurement.

Q: Do substitute parts maintain the same moisture sensitivity level?

A: Yes. All substitute parts carry MSL Level 1 (Unlimited) rating, identical to the original SMBJ75C-E3/5B. This classification indicates no moisture sensitivity restrictions for storage or handling.

Q: Which substitute offers the widest operating temperature range?

A: SMBJ75CE3/TR13 (Microchip Technology) extends the minimum operating temperature to -65°C, compared to -55°C on the original and most substitutes. SMBJ75CA (MDD) has a minimum operating temperature of -50°C. Selection should align with the application's thermal requirements.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the regulatory status of the original SMBJ75C-E3/5B.