SMBJ75C Equivalent & Substitute Parts

Part Overview

The SMBJ75C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 75V reverse standoff voltage with a 127.05V maximum clamping voltage and 5A peak pulse current capability in a DO-214AA (SMB) package. The SMBJ75C is classified as obsolete, making identification of functionally equivalent active alternatives necessary for new designs and ongoing production support.

Substiute Parts

SMBJ75C

Littelfuse Inc.In Stock: 917SMBJ75C Datasheet

Current PartRFQ

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

SMBJ75CE3/TR13

Microchip TechnologyIn Stock: 1025SMBJ75CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ75C is determined by the following critical parameters that must remain within acceptable tolerances:

• Reverse Standoff Voltage (Typ): 75V — all substitutes maintain this specification
• Package / Case: DO-214AA, SMB — all substitutes use identical surface-mount packaging
• Peak Pulse Power: 600W — all substitutes maintain this power rating
• Bidirectional Channels: 1 — all substitutes are single-channel devices
• Mounting Type: Surface Mount — all substitutes are surface-mount compatible
• RoHS Compliance: ROHS3 Compliant — all substitutes meet this regulatory requirement
• MSL Rating: 1 (Unlimited) — all substitutes have unlimited moisture sensitivity

Acceptable variation exists in clamping voltage (121V to 134V range) and peak pulse current (4.5A to 5.3A range), as these parameters remain within the functional operating envelope for general-purpose transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (SMBJ75CA from MDD, SMBJ75CA-13-F from Diodes Incorporated, and SMBJ75CE3/TR13 from Microchip Technology) are active products with ROHS3 compliance and unlimited MSL ratings, making them suitable replacements for the obsolete SMBJ75C.

SMBJ75CA (MDD) offers the highest peak pulse current specification at 5.3A and maintains the lowest clamping voltage at 121V, providing the closest electrical performance to the original SMBJ75C. This part is available in the highest quantity (45,300 pcs).

SMBJ75CA-13-F (Diodes Incorporated) provides a mid-range alternative with 4.9A peak pulse current and 121V clamping voltage. This part supports an extended operating temperature range down to -55°C and is available in substantial quantity (29,300 pcs).

SMBJ75CE3/TR13 (Microchip Technology) features the widest operating temperature range (-65°C to 150°C, matching the original specification) and maintains the original -65°C lower temperature limit. The clamping voltage is 134V with 4.5A peak pulse current. Inventory availability is lower at 987 pcs.

Selection should prioritize product availability, supply chain stability, and specific temperature range requirements for the application.

Frequently Asked Questions (FAQ)

Q: Can SMBJ75CA be used as a direct replacement for SMBJ75C?

A: Yes. Both parts share identical reverse standoff voltage (75V), package type (DO-214AA/SMB), power rating (600W), and compliance certifications (ROHS3, MSL 1). The SMBJ75CA operates within the functional envelope of the SMBJ75C with 5.3A peak pulse current and 121V clamping voltage.

Q: What is the difference between the three substitute options?

A: The primary differences are peak pulse current (4.5A to 5.3A), clamping voltage (121V to 134V), and operating temperature range (-50°C to -65°C minimum). All three maintain the 75V reverse standoff voltage and 600W power rating required for substitution.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range affects application suitability but does not prevent substitution. The SMBJ75CE3/TR13 maintains the original -65°C lower limit. The SMBJ75CA and SMBJ75CA-13-F have higher minimum operating temperatures (-50°C and -55°C respectively) and are suitable for applications not requiring extreme cold operation.

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

A: Yes. All substitute parts use DO-214AA (SMB) surface-mount packaging, identical to the SMBJ75C. The SMBJ75CA and SMBJ75CA-13-F are supplied in Tape & Reel (TR) format for automated assembly.

Q: What compliance certifications apply to these parts?

A: All parts (original and substitutes) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. REACH status is unaffected for all substitute parts. ECCN classification is EAR99 for all parts.