LZ52C36W Equivalent & Substitute Parts

Part Overview

The LZ52C36W is a Zener diode manufactured by Diodes Incorporated, rated at 36 V nominal voltage with 500 mW maximum power dissipation. This component is designed for surface mount applications in the 1206 (3216 Metric) package. The part is classified as obsolete, necessitating identification of active equivalent components for ongoing design requirements and procurement continuity.

Substiute Parts

LZ52C36W

Diodes IncorporatedIn Stock: 826LZ52C36W Datasheet

Current PartRFQ

BZT52C36-7-F

Diodes IncorporatedIn Stock: 77378BZT52C36-7-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LZ52C36W is determined by the following critical parameters:

Electrical Specifications:

• Zener voltage rating of 36 V nominal
• Maximum power dissipation of 500 mW
• Operating temperature range compatibility

Mechanical Specifications:

• Surface mount technology requirement
• Package form factor compatibility

Compliance Requirements:

• ROHS3 compliance
• Moisture sensitivity level classification

The substitute part BZT52C36-7-F meets the primary electrical requirements (36 V nominal, 500 mW power rating) and maintains surface mount technology. Both parts are ROHS3 compliant and carry MSL 1 classification. Differences in tolerance, impedance, and package form factor (SOD-123 versus 1206) represent trade-offs in the substitution relationship.

Parameter Comparison

Engineering Selection Recommendations

The BZT52C36-7-F serves as the active equivalent for the obsolete LZ52C36W. Both components are manufactured by Diodes Incorporated and maintain identical nominal Zener voltage (36 V) and maximum power rating (500 mW).

Product Status Consideration: The LZ52C36W is classified as obsolete, while BZT52C36-7-F maintains active product status with significantly higher inventory availability (77,300 pcs versus 736 pcs). This status differential supports transition to the substitute part for new designs and ongoing procurement.

Compliance Alignment: Both parts maintain ROHS3 compliance and MSL 1 classification, ensuring regulatory and environmental compatibility across applications.

Package Form Factor: The primary mechanical difference is the package transition from 1206 (3216 Metric) to SOD-123. This change requires PCB layout modification and may affect thermal management characteristics due to reduced package size.

Electrical Parameter Variations: The substitute exhibits wider tolerance (±6% versus ±2%), higher impedance (90 Ohms versus 80 Ohms), and reduced maximum operating temperature (150°C versus 175°C). These variations must be evaluated against specific circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can BZT52C36-7-F directly replace LZ52C36W without PCB modification?

A: No. The package form factor differs (SOD-123 versus 1206). PCB footprint redesign is required. Pin configuration and thermal characteristics also differ due to package geometry.

Q: What is the impact of the ±6% tolerance on BZT52C36-7-F compared to ±2% on LZ52C36W?

A: The wider tolerance on the substitute part results in greater variation in actual Zener voltage across the production range. Circuit designs dependent on tight voltage regulation must account for this increased tolerance band.

Q: Are both parts suitable for the same operating temperature range?

A: No. The LZ52C36W operates to 175°C (TJ), while BZT52C36-7-F is rated to 150°C maximum. Applications requiring operation above 150°C cannot use the substitute part.

Q: What is the significance of the impedance difference (80 Ohms versus 90 Ohms)?

A: Impedance affects voltage regulation under load changes. The 10 Ohm difference represents a 12.5% increase in dynamic impedance on the substitute part, potentially affecting circuit stability in applications with variable load conditions.

Q: Why is inventory availability significantly higher for BZT52C36-7-F?

A: BZT52C36-7-F maintains active product status with ongoing manufacturing, while LZ52C36W is obsolete with limited remaining stock. The inventory differential reflects the product lifecycle status of each component.

Q: Are both parts RoHS compliant?

A: Yes. Both LZ52C36W and BZT52C36-7-F are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity classification.

Q: What are the reverse leakage current specifications?

A: LZ52C36W specifies 100 nA @ 27 V, while BZT52C36-7-F specifies 100 nA @ 25.2 V. Both maintain equivalent leakage characteristics at their respective reference voltages.