DDZ39FS-7 Equivalent & Substitute Parts

Part Overview

The DDZ39FS-7 is a Zener diode manufactured by Diodes Incorporated, rated at 39 V nominal with 200 mW maximum power dissipation in a surface mount SOD-323 package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified when circuit designs require alternative sourcing, inventory availability, or performance specifications that align with or exceed the original component ratings within the same functional category.

Substiute Parts

DDZ39FS-7

Diodes IncorporatedIn Stock: 824DDZ39FS-7 Datasheet

Current PartRFQ

BZX384-B39,115

Nexperia USA Inc.In Stock: 15175BZX384-B39,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DDZ39FS-7 are qualified based on the following criteria:

Critical Matching Parameters:

• Zener voltage nominal rating: 39 V
• Package type: SOD-323 (SC-76)
• Mounting configuration: Surface Mount
• Operating temperature range: -65°C ~ 150°C minimum
• Regulatory compliance: ROHS3 Compliant

Allowable Variations:

• Power dissipation rating: Equal to or greater than 200 mW
• Voltage tolerance: Equal to or tighter than ±3%
• Impedance and leakage characteristics: Within acceptable circuit performance margins

The BZX384-B39,115 qualifies as a direct substitute because it maintains identical zener voltage, package, mounting type, and temperature range while providing enhanced power rating (300 mW) and improved voltage tolerance (±2%).

Parameter Comparison

Engineering Selection Recommendations

DDZ39FS-7 (Diodes Incorporated):

• Primary selection for applications with established supply chain and inventory availability (765 pcs in stock)
• Suitable for circuits requiring 200 mW maximum power dissipation at 39 V zener voltage
• Active product status ensures continued manufacturing support
• ROHS3 compliant and REACH unaffected for regulated applications

BZX384-B39,115 (Nexperia USA Inc.):

• Alternative selection offering higher power rating (300 mW) for enhanced thermal margin
• Improved voltage tolerance (±2% vs ±3%) for tighter regulation requirements
• Significantly higher inventory availability (15,120 pcs in stock)
• Active product status with identical regulatory compliance
• Direct pin-compatible replacement in SOD-323 footprint

Both parts are Active products with identical compliance certifications, operating temperature ranges, and package specifications. Selection between them depends on circuit power requirements and supply chain preferences.

Frequently Asked Questions (FAQ)

Q: Can BZX384-B39,115 be used as a direct replacement for DDZ39FS-7?

A: Yes. Both components share identical zener voltage (39 V), SOD-323 package, surface mount configuration, and operating temperature range (-65°C ~ 150°C). The BZX384-B39,115 provides equal or superior electrical performance with higher power rating (300 mW vs 200 mW) and tighter tolerance (±2% vs ±3%).

Q: What are the key differences between these two parts?

A: The primary differences are power dissipation rating (200 mW vs 300 mW), voltage tolerance (±3% vs ±2%), impedance specification (85 Ohms vs 130 Ohms), and manufacturer (Diodes Incorporated vs Nexperia USA Inc.). All other parameters, including zener voltage, package type, and temperature range, are identical.

Q: Are both parts suitable for the same PCB layout?

A: Yes. Both components use the SOD-323 package with identical pin configuration and footprint. No PCB redesign is required for substitution.

Q: What compliance certifications apply to both parts?

A: Both DDZ39FS-7 and BZX384-B39,115 are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8541.10.0050. Both have Moisture Sensitivity Level 1 (Unlimited).

Q: Which part should be selected for new designs?

A: Selection depends on circuit requirements and supply availability. For applications requiring maximum power dissipation of 200 mW, either part is acceptable. For applications benefiting from higher power margin or tighter voltage tolerance, BZX384-B39,115 is the preferred choice. Inventory availability favors BZX384-B39,115 (15,120 pcs vs 765 pcs).

Q: Are there any thermal or reliability differences between these parts?

A: Both parts operate across the identical temperature range (-65°C ~ 150°C) and share the same moisture sensitivity classification. The higher power rating of BZX384-B39,115 provides additional thermal headroom in power-limited applications.