SMBJ15A-TP Equivalent & Substitute Parts

Part Overview

The SMBJ15A-TP is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. The device features a 15V reverse standoff voltage with a 24.4V maximum clamping voltage and 24A peak pulse current capability in a DO-214AA (SMB) package. This part is active in production with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when electrical parameters remain within acceptable tolerances and mechanical compatibility is maintained. The primary substitution criteria include matching reverse standoff voltage, clamping voltage, peak pulse current, power dissipation, and package form factor.

Substiute Parts

SMBJ15A-TP

Micro Commercial CoIn Stock: 772SMBJ15A-TP Datasheet

Current PartRFQ

SMBJ15A

EVVO SemiIn Stock: 35459SMBJ15A Datasheet

DirectRFQ

SMBJ15A

EVVO SemiIn Stock: 35459SMBJ15A Datasheet

DirectRFQ

SMBJ15A

EVVO SemiIn Stock: 35459SMBJ15A Datasheet

DirectRFQ

SMBJ15A-13-F

Diodes IncorporatedIn Stock: 50211SMBJ15A-13-F Datasheet

DirectRFQ

SMBJ15A-TR

STMicroelectronicsIn Stock: 31230SMBJ15A-TR Datasheet

SimilarRFQ

SZ1SMB15AT3G

Littelfuse Inc.In Stock: 17812SZ1SMB15AT3G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ15A-TP are classified based on strict electrical and mechanical parameter alignment:

Direct Substitutes maintain identical electrical specifications (15V reverse standoff, 16.7V minimum breakdown, 24.4V clamping voltage, 24A peak pulse current, 600W peak power) and package form factor (DO-214AA, SMB). These parts are interchangeable without circuit redesign.

Similar Substitutes maintain core electrical parameters within the specified tolerances but may exhibit minor variations in peak pulse current (24–25.1A range) or operating temperature range. Package compatibility remains consistent (DO-214AA/SMB or equivalent surface-mount form factors).

The following parameters determine substitution eligibility:

• Voltage - Reverse Standoff: 15V (fixed)
• Voltage - Clamping (Max) @ Ipp: 24.4V (fixed)
• Current - Peak Pulse: 24–25.1A (acceptable range)
• Power - Peak Pulse: 600W (fixed)
• Package / Case: DO-214AA, SMB (fixed)
• Mounting Type: Surface Mount (fixed)

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and full RoHS3 compliance, ensuring regulatory alignment with the original SMBJ15A-TP specification.

SMBJ15A-13-F (Diodes Incorporated) and SMBJ15A-TR (STMicroelectronics) are direct mechanical and electrical equivalents in the DO-214AA SMB package with identical reverse standoff and clamping voltages. Both support the full -55 to 150°C operating range and are suitable for general-purpose TVS applications.

SZ1SMB15AT3G (Littelfuse Inc.) provides equivalent electrical performance with automotive-grade qualification (AEC-Q101) and extended low-temperature operation (-65°C), making it appropriate for automotive or harsh-environment applications requiring additional reliability certification.

SMBJ15A (EVVO Semi) exhibits a package variation (DO-214AC, SMA) and slightly elevated peak pulse current (24.6A). This part requires PCB layout verification for mechanical compatibility despite electrical parameter alignment.

The SMBJ15A-TP operates to 175°C junction temperature, which exceeds the maximum operating range of all listed substitutes (150°C maximum). Applications requiring sustained operation above 150°C junction temperature cannot use these substitutes without thermal design modification.

Frequently Asked Questions (FAQ)

Q: Can SMBJ15A-13-F replace SMBJ15A-TP directly on the PCB?

A: Yes. Both parts share identical electrical parameters (15V standoff, 24.4V clamping, 24A peak pulse) and the same DO-214AA SMB package footprint. No circuit modification is required.

Q: What is the difference between SMBJ15A-TR and SMBJ15A-TP?

A: Both parts maintain identical reverse standoff voltage (15V), clamping voltage (24.4V), and package form factor (DO-214AA SMB). SMBJ15A-TR exhibits slightly higher peak pulse current (25.1A vs. 24A) and operates to 150°C maximum junction temperature compared to SMBJ15A-TP at 175°C. For applications within the -55 to 150°C range, SMBJ15A-TR is functionally equivalent.

Q: Why does SMBJ15A (EVVO Semi) show a different package designation?

A: EVVO Semi lists the package as DO-214AC, SMA, which differs from the DO-214AA, SMB designation of the original part. While these packages are mechanically similar surface-mount diode packages, PCB footprint verification is required before substitution to ensure pad alignment and solder joint integrity.

Q: Is SZ1SMB15AT3G suitable for automotive applications?

A: Yes. SZ1SMB15AT3G carries AEC-Q101 automotive qualification and operates across -65 to 150°C, making it appropriate for automotive-grade overvoltage protection circuits. All electrical parameters match the SMBJ15A-TP specification.

Q: Can I use these substitutes in applications requiring operation above 150°C?

A: No. The SMBJ15A-TP operates to 175°C junction temperature, while all listed substitutes are rated to 150°C maximum. Applications requiring sustained operation above 150°C require alternative parts or thermal design modification to maintain junction temperature within rated limits.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification, matching the regulatory status of the original SMBJ15A-TP.