SMBJ5929B-TP Equivalent & Substitute Parts

Part Overview

The SMBJ5929B-TP is a Zener diode manufactured by Micro Commercial Co, rated at 15 V nominal Zener voltage with 1.5 W maximum power dissipation. This surface mount component operates across a temperature range of -55°C to 150°C and is packaged in the DO-214AA (SMB) form factor. The part is currently in active production status with 746 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative specifications better suit application requirements.

Substiute Parts

SMBJ5929B-TP

Micro Commercial CoIn Stock: 854SMBJ5929B-TP Datasheet

Current PartRFQ

SZ1SMB5929BT3G

onsemiIn Stock: 35170SZ1SMB5929BT3G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ5929B-TP is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Zener voltage (Vz) must equal 15 V nominal
• Tolerance must be ±5%
• Impedance (Zzt) must not exceed 9 Ohms maximum
• Reverse leakage current must not exceed 1 µA @ 11.4 V
• Forward voltage (Vf) must not exceed 1.5 V @ 200 mA

Mechanical Compatibility Criteria:

• Package type must be DO-214AA (SMB) surface mount
• Operating temperature range must encompass the application requirements

Power Rating Consideration: Substitute parts with power ratings equal to or greater than 1.5 W are acceptable, as higher power ratings provide equivalent or superior thermal performance without compromising circuit function.

The identified substitute SZ1SMB5929BT3G meets all electrical parameters and mechanical requirements, with the additional benefit of a 3 W power rating and automotive-grade qualification.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: SMBJ5929B-TP

The SMBJ5929B-TP is suitable for applications requiring a 15 V Zener diode with 1.5 W power dissipation in bulk packaging. This part maintains active production status and is REACH Unaffected. The component is classified under ECCN EAR99 and HTSUS 8541.10.0050.

Substitute Part: SZ1SMB5929BT3G

The SZ1SMB5929BT3G from onsemi is a direct electrical substitute with identical Zener voltage, tolerance, impedance, reverse leakage, and forward voltage characteristics. This part offers enhanced thermal performance with 3 W maximum power rating and an extended lower operating temperature limit of -65°C (compared to -55°C for the main part). The substitute carries AEC-Q101 automotive qualification and is RoHS3 compliant with MSL 1 (Unlimited moisture sensitivity level). The part is supplied in Tape & Reel format, which is suitable for automated assembly processes.

Selection between these parts depends on packaging requirements (bulk versus tape & reel), thermal design margins, and automotive qualification necessity. Both parts are electrically interchangeable within the specified parameter tolerances.

Frequently Asked Questions (FAQ)

Q: Can the SZ1SMB5929BT3G replace the SMBJ5929B-TP in existing designs?

A: Yes. The SZ1SMB5929BT3G meets all electrical specifications of the SMBJ5929B-TP, including Zener voltage (15 V), tolerance (±5%), impedance (9 Ohms maximum), reverse leakage (1 µA @ 11.4 V), and forward voltage (1.5 V @ 200 mA). Both components use identical DO-214AA (SMB) packaging and surface mount technology. The substitute is electrically compatible for direct replacement.

Q: What is the difference in power rating between these parts?

A: The SMBJ5929B-TP is rated at 1.5 W maximum power dissipation, while the SZ1SMB5929BT3G is rated at 3 W. A higher power rating indicates greater thermal capacity and allows the component to dissipate more heat without exceeding maximum junction temperature. In applications where the SMBJ5929B-TP operates within its 1.5 W limit, the 3 W substitute provides additional thermal margin.

Q: Are there packaging differences between these parts?

A: Yes. The SMBJ5929B-TP is supplied in bulk packaging, while the SZ1SMB5929BT3G is supplied in Tape & Reel (TR) format. Bulk packaging is suitable for manual assembly and small-volume applications. Tape & Reel format is optimized for automated pick-and-place assembly processes and high-volume production. The physical component dimensions and footprint remain identical (DO-214AA, SMB).

Q: Does the SZ1SMB5929BT3G have any additional certifications?

A: Yes. The SZ1SMB5929BT3G carries AEC-Q101 automotive qualification and is RoHS3 compliant. The SMBJ5929B-TP does not list these certifications. If automotive-grade qualification is required for the application, the SZ1SMB5929BT3G is the appropriate selection.

Q: What is the operating temperature range difference?

A: The SMBJ5929B-TP operates from -55°C to 150°C (junction temperature). The SZ1SMB5929BT3G operates from -65°C to 150°C. The substitute extends the lower temperature limit by 10°C, providing compatibility with applications requiring operation in colder environments.

Q: Are both parts currently in stock?

A: Yes. The SMBJ5929B-TP has 746 units in stock. The SZ1SMB5929BT3G has 35,100 units in stock. Both parts maintain active production status.