BZT52B28S-TP Equivalent & Substitute Parts

Part Overview

The BZT52B28S-TP is a Zener diode rated at 28 V nominal voltage with 200 mW maximum power dissipation in a surface mount SOD-323 package. This component is classified as obsolete, indicating that the original manufacturer has discontinued production. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

BZT52B28S-TP

Micro Commercial CoIn Stock: 715BZT52B28S-TP Datasheet

Current PartRFQ

BZT52B28JS-TP

Micro Commercial CoIn Stock: 1124BZT52B28JS-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZT52B28S-TP is determined by strict equivalence across the following critical parameters:

• Zener Voltage (Vz): 28 V nominal with ±2% tolerance
• Power Rating: 200 mW maximum dissipation
• Package Type: SOD-323 surface mount configuration
• Impedance (Zzt): 80 Ohms maximum
• Reverse Leakage Current: 100 nA @ 22 V
• Forward Voltage: 900 mV maximum @ 10 mA
• Temperature Range: -55°C to 175°C junction temperature
• Compliance: ROHS3 compliant with MSL 1 rating

Substitute parts must match all electrical specifications and physical package requirements. Product status differences (obsolete versus active) do not affect electrical interchangeability but influence supply availability and long-term sourcing strategy.

Parameter Comparison

Engineering Selection Recommendations

The BZT52B28JS-TP is a direct electrical and mechanical equivalent to the BZT52B28S-TP. All critical electrical parameters, package specifications, and compliance certifications are identical. The primary distinction is product status: the BZT52B28JS-TP is currently active in production, whereas the BZT52B28S-TP is obsolete.

For new designs or ongoing production requiring 28 V Zener diodes in SOD-323 packages, the BZT52B28JS-TP is the appropriate selection. For legacy system repairs or maintenance where the original BZT52B28S-TP is specified, the BZT52B28JS-TP provides full functional and physical compatibility without design modification.

Both parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring compatibility with standard surface mount assembly processes and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can the BZT52B28JS-TP be used as a direct replacement for the BZT52B28S-TP?

A: Yes. The BZT52B28JS-TP is electrically and mechanically identical to the BZT52B28S-TP across all specified parameters, including Zener voltage, power rating, impedance, leakage current, forward voltage, temperature range, and package configuration. No circuit modifications are required.

Q: What is the difference between these two part numbers?

A: The primary difference is product status. The BZT52B28S-TP is obsolete, while the BZT52B28JS-TP is active in production. All electrical and physical specifications are equivalent.

Q: Are both parts compatible with the same PCB footprint?

A: Yes. Both parts use the SOD-323 package (SC-76), which defines identical physical dimensions and pin configuration. PCB layouts designed for either part are interchangeable.

Q: Do these parts have the same compliance certifications?

A: Yes. Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. They meet identical environmental and regulatory requirements.

Q: What is the operating temperature range for these Zener diodes?

A: Both parts operate across a junction temperature range of -55°C to 175°C, supporting applications in standard industrial and extended temperature environments.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The BZT52B28JS-TP provides complete functional and physical compatibility with designs originally specified for the BZT52B28S-TP. No design changes, re-qualification, or testing are required for substitution.