LZ52C30WS Equivalent & Substitute Parts

Part Overview

The LZ52C30WS is a Zener diode manufactured by Diodes Incorporated, rated for 30 V nominal Zener voltage with 500 mW maximum power dissipation. This component is packaged in a 1206 surface mount configuration and features ±2% voltage tolerance. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility while ensuring continued supply chain availability.

Substiute Parts

LZ52C30WS

Diodes IncorporatedIn Stock: 849LZ52C30WS Datasheet

Current PartRFQ

BZT52C30S-7-F

Diodes IncorporatedIn Stock: 4388BZT52C30S-7-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LZ52C30WS is determined by the following critical parameters:

Primary Matching Criteria:

• Zener voltage: 30 V nominal (core functional requirement)
• Impedance (Max): 80 Ohms (electrical performance specification)
• Reverse leakage current: 100 nA @ specified reverse voltage (leakage characteristic)
• RoHS3 compliance and REACH unaffected status (regulatory requirement)

Secondary Considerations:

• Power rating: Substitute parts may have lower maximum power dissipation if circuit design permits
• Voltage tolerance: Substitute parts may have wider tolerance bands
• Operating temperature range: Substitute parts may have narrower temperature ranges
• Package type: Surface mount alternatives in different package configurations are acceptable if board layout accommodates

The BZT52C30S-7-F meets the primary matching criteria with identical Zener voltage, impedance, and reverse leakage specifications. This part is active and maintains full regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The BZT52C30S-7-F is an active equivalent for the obsolete LZ52C30WS. Both components are manufactured by Diodes Incorporated and maintain identical Zener voltage (30 V), impedance (80 Ohms maximum), and reverse leakage current (100 nA) specifications. Both parts are ROHS3 compliant and REACH unaffected.

Design Considerations:

The BZT52C30S-7-F operates within a narrower temperature range (-65°C to 150°C versus -65°C to 175°C) and has reduced maximum power dissipation (200 mW versus 500 mW). Voltage tolerance is wider (±7% versus ±2%). These differences require circuit-level evaluation to confirm compatibility with application requirements.

The package transition from 1206 to SOD-323 necessitates board layout modification. The SOD-323 package is significantly smaller and requires updated PCB footprint design.

Selection of the BZT52C30S-7-F is appropriate for applications where the reduced power rating, narrower temperature range, and wider tolerance band are acceptable within circuit design margins.

Frequently Asked Questions (FAQ)

Q: Can the BZT52C30S-7-F directly replace the LZ52C30WS without circuit modification?

A: The BZT52C30S-7-F provides equivalent electrical performance for the core Zener function (30 V regulation, 80 Ohms impedance, 100 nA leakage). However, the reduced power rating (200 mW versus 500 mW) and narrower operating temperature range (-65°C to 150°C versus -65°C to 175°C) require verification against circuit specifications. PCB layout modification is mandatory due to package change from 1206 to SOD-323.

Q: What is the impact of the ±7% tolerance on the BZT52C30S-7-F compared to the ±2% tolerance of the LZ52C30WS?

A: The wider tolerance band of the BZT52C30S-7-F results in greater variation in Zener voltage across the production range. Applications requiring tight voltage regulation should evaluate whether the ±7% tolerance band remains within acceptable circuit operating margins.

Q: Are both parts compliant with current regulatory requirements?

A: Both the LZ52C30WS and BZT52C30S-7-F are ROHS3 compliant and REACH unaffected. Both parts meet current regulatory standards for electronic component manufacturing and use.

Q: What are the package differences between these parts?

A: The LZ52C30WS uses a 1206 (3216 Metric) surface mount package. The BZT52C30S-7-F uses an SOD-323 (SC-76) package, which is substantially smaller. This package change requires new PCB footprint design and updated assembly procedures.

Q: Is the BZT52C30S-7-F available in higher quantities?

A: The BZT52C30S-7-F is an active product with 4300 pieces in stock, compared to the obsolete LZ52C30WS with 838 pieces remaining. The active status of the BZT52C30S-7-F ensures continued supply chain availability.