1SMB5952 Equivalent & Substitute Parts

Part Overview

The 1SMB5952 is a surface mount Zener diode rated at 130 V nominal voltage with 3 W maximum power dissipation in a DO-214AA (SMB) package. Manufactured by Taiwan Semiconductor Corporation, this component is classified as Active and fully compliant with RoHS3 and REACH regulations. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity across manufacturing environments.

Substiute Parts

1SMB5952

Taiwan Semiconductor CorporationIn Stock: 7371SMB5952 Datasheet

Current PartRFQ

1SMB5952BT3G

onsemiIn Stock: 102311SMB5952BT3G Datasheet

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SMBJ5382B-TP

Micro Commercial CoIn Stock: 9494SMBJ5382B-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1SMB5952 are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalent (Upgrade Substitute): The 1SMB5952BT3G manufactured by onsemi maintains identical electrical specifications including 130 V nominal Zener voltage, ±5% tolerance, 3 W maximum power, 450 Ohms maximum impedance, and 1 µA reverse leakage current. This part operates across an extended temperature range of -65°C to 150°C compared to the original -55°C to 150°C. Both components use the DO-214AA (SMB) package and are RoHS3 compliant with MSL 1 rating.

Similar Substitute (Higher Voltage/Power Rating): The SMBJ5382B-TP manufactured by Micro Commercial Co operates at 140 V nominal Zener voltage with 5 W maximum power dissipation. This part exhibits different electrical characteristics including 230 Ohms maximum impedance and 500 nA reverse leakage current at 106 V. The SMBJ5382B-TP is suitable for applications requiring higher voltage regulation or increased power handling within the same DO-214AA (SMB) package footprint.

Substitution eligibility is determined by matching the following critical parameters: Zener voltage rating, power dissipation capability, package type, mounting configuration, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution: The 1SMB5952BT3G is a direct functional equivalent suitable for one-to-one replacement in existing designs. This onsemi component maintains identical Zener voltage and power specifications while providing an extended lower operating temperature limit of -65°C. Both the original 1SMB5952 and the 1SMB5952BT3G are Active products with full RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard surface mount assembly processes.

For Higher Performance Requirements: The SMBJ5382B-TP offers increased power dissipation (5 W versus 3 W) and higher Zener voltage (140 V versus 130 V). This part is appropriate for applications requiring enhanced thermal performance or voltage regulation at elevated levels. The lower impedance characteristic (230 Ohms) provides improved dynamic response. Selection of this part requires circuit-level evaluation to confirm voltage and power specifications align with application requirements.

Compliance and Availability: All three components maintain Active product status, RoHS3 compliance, and unlimited moisture sensitivity rating. Selection should prioritize inventory availability and lead time requirements alongside electrical parameter matching.

Frequently Asked Questions (FAQ)

Q: Can the 1SMB5952BT3G replace the 1SMB5952 in all applications?

A: Yes. The 1SMB5952BT3G is a direct equivalent with identical Zener voltage (130 V), power rating (3 W), impedance (450 Ohms), and reverse leakage characteristics. The extended temperature range (-65°C to 150°C) provides additional operational margin. Both components use the DO-214AA (SMB) package and are RoHS3 compliant.

Q: When should the SMBJ5382B-TP be selected instead of the 1SMB5952?

A: The SMBJ5382B-TP is selected when the application requires 140 V Zener voltage or 5 W power dissipation. The higher power rating and lower impedance (230 Ohms) make this part suitable for circuits with increased thermal demands or higher voltage regulation requirements. Circuit design parameters must confirm compatibility with the 140 V specification.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three components use the DO-214AA (SMB) package, ensuring identical PCB footprint and land pattern compatibility. No layout modifications are required for substitution.

Q: What is the significance of the impedance difference between parts?

A: Impedance affects dynamic response and voltage regulation characteristics. The 1SMB5952 and 1SMB5952BT3G both specify 450 Ohms maximum impedance, while the SMBJ5382B-TP specifies 230 Ohms. Lower impedance provides faster transient response but is only relevant if the application circuit design accounts for this parameter.

Q: Do all parts meet the same compliance standards?

A: Yes. All three components are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. They are suitable for standard surface mount assembly and storage without special handling requirements.

Q: What is the difference in reverse leakage current specifications?

A: The 1SMB5952 and 1SMB5952BT3G specify 1 µA reverse leakage at 98.8 V. The SMBJ5382B-TP specifies 500 nA reverse leakage at 106 V. Lower leakage current indicates reduced off-state current, which may be relevant in low-power or precision circuit applications.