BZT52B43S-TP Equivalent & Substitute Parts

Part Overview

The BZT52B43S-TP is a Zener diode rated at 43 V nominal voltage with 200 mW maximum power dissipation in a surface mount SOD-323 package. Manufactured by Micro Commercial Co, this component is classified as obsolete product status. Due to its obsolete designation, locating equivalent or substitute parts from active product lines is necessary for ongoing design support, production continuity, and long-term component availability. The substitute part identified maintains the core electrical specifications while offering active product status and improved availability.

Substiute Parts

BZT52B43S-TP

Micro Commercial CoIn Stock: 1284BZT52B43S-TP Datasheet

Current PartRFQ

BZT52B43JS-TP

Micro Commercial CoIn Stock: 781BZT52B43JS-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZT52B43S-TP is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Zener voltage rating: 43 V nominal
• Tolerance: ±2%
• Maximum power dissipation: 200 mW
• Package type: SOD-323 surface mount
• RoHS3 compliance
• Moisture sensitivity level: 1 (Unlimited)

The BZT52B43JS-TP qualifies as a direct substitute based on matching all primary criteria. Both parts share identical nominal voltage, tolerance, power rating, and package configuration. The substitute part is sourced from the same manufacturer and maintains full compliance with environmental and regulatory requirements. The key distinction is product status: BZT52B43JS-TP is active, whereas BZT52B43S-TP is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The BZT52B43JS-TP is the direct substitute for the obsolete BZT52B43S-TP. Selection of the substitute part is supported by the following factors:

Compliance & Regulatory: Both parts maintain ROHS3 compliance and identical moisture sensitivity classification, ensuring compatibility with current manufacturing and environmental standards.

Product Status: The substitute part carries active product status, providing assured long-term availability and supply chain continuity compared to the obsolete main part.

Electrical Equivalence: Core electrical parameters—nominal voltage, tolerance, power rating, and forward voltage—are identical between both parts. Impedance and reverse leakage characteristics remain within acceptable engineering tolerances for Zener diode applications.

Packaging & Mounting: Both parts utilize identical SOD-323 surface mount packaging, enabling direct board-level substitution without design modification or PCB rework.

Temperature Consideration: The substitute part specifies a maximum operating temperature of 150°C versus 175°C for the main part. Applications requiring operation above 150°C junction temperature require thermal analysis to confirm suitability.

Frequently Asked Questions (FAQ)

Q: Can BZT52B43JS-TP be used as a direct replacement for BZT52B43S-TP?

A: Yes. Both parts share identical nominal voltage (43 V), tolerance (±2%), power rating (200 mW), and SOD-323 package configuration. The substitute part is sourced from the same manufacturer and maintains full RoHS3 compliance. Direct board-level substitution is supported without design changes.

Q: What is the primary difference between these two parts?

A: The main difference is product status. BZT52B43S-TP is obsolete, while BZT52B43JS-TP is active. The substitute part also specifies a narrower operating temperature range (-55°C to 150°C versus -55°C to 175°C).

Q: Are there packaging differences between BZT52B43S-TP and BZT52B43JS-TP?

A: Both parts use identical SOD-323 surface mount packaging. The main part is supplied in standard packaging, while the substitute is supplied in Tape & Reel (TR) format. This difference affects procurement and handling but does not impact electrical performance or board-level compatibility.

Q: Does the impedance difference affect circuit performance?

A: The substitute part specifies 141 Ohms maximum impedance compared to 100 Ohms for the main part. This difference remains within acceptable tolerances for Zener diode applications and does not require circuit redesign. Impedance variation is a normal characteristic across Zener diode manufacturing batches.

Q: Can I use BZT52B43JS-TP in applications requiring operation above 150°C junction temperature?

A: Applications requiring sustained operation above 150°C junction temperature require thermal analysis. The substitute part is rated to 150°C maximum, compared to 175°C for the main part. Verify that your thermal design maintains junction temperature within the substitute part's specified range.

Q: Are both parts RoHS compliant?

A: Yes. Both BZT52B43S-TP and BZT52B43JS-TP are ROHS3 compliant and carry identical moisture sensitivity classification (MSL 1, Unlimited), ensuring compatibility with current manufacturing standards and environmental regulations.