Equivalent & Substitute Parts for DZ2W03900L

Part Overview

The DZ2W03900L is a Zener diode manufactured by Panasonic Electronic Components, rated at 3.9 V nominal with 1 W maximum power dissipation. This surface mount component is packaged in SOD-123F and is designed for voltage regulation and protection applications. The part is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives from active manufacturers that maintain compatible electrical and mechanical specifications.

Substiute Parts

DZ2W03900L

Panasonic Electronic ComponentsIn Stock: 4317DZ2W03900L Datasheet

Current PartRFQ

KDZVTFTR3.9B

Rohm SemiconductorIn Stock: 12014KDZVTFTR3.9B Datasheet

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KDZVTR3.6B

Rohm SemiconductorIn Stock: 6224KDZVTR3.6B Datasheet

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KDZVTR3.9B

Rohm SemiconductorIn Stock: 150278KDZVTR3.9B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DZ2W03900L is determined by the following critical parameters:

Primary Substitution Criteria:

• Package / Case: SOD-123F (mechanical compatibility)
• Power - Max: 1 W (thermal rating)
• Mounting Type: Surface Mount (assembly compatibility)
• Voltage - Zener (Nom): Nominal voltage within acceptable circuit tolerance
• RoHS Compliance: Environmental and regulatory compliance

Substitution Logic:

The three identified substitute parts from Rohm Semiconductor maintain the SOD-123F package and 1 W power rating. However, nominal Zener voltages differ from the main part:

• KDZVTFTR3.9B and KDZVTR3.9B: Both rated at 4.15 V nominal, representing a +6.41% deviation from the 3.9 V specification
• KDZVTR3.6B: Rated at 3.8 V nominal, representing a -2.56% deviation from the 3.9 V specification

These voltage deviations fall within typical circuit tolerance windows for voltage regulation applications where the Zener voltage operates within a defined operating range. All substitute parts maintain the same package footprint, power dissipation capability, and surface mount assembly requirements as the original part.

Parameter Comparison

Engineering Selection Recommendations

KDZVTR3.6B (Rohm Semiconductor) provides the closest nominal voltage match at 3.8 V, representing a -2.56% deviation from the 3.9 V specification. This part maintains identical reverse leakage current (60 µA @ 1 V) and is actively manufactured with ROHS3 compliance. The voltage deviation is within typical circuit tolerance for Zener regulation applications.

KDZVTR3.9B (Rohm Semiconductor) offers the highest inventory availability (150,200 pcs) and active product status. The 4.15 V nominal rating represents a +6.41% deviation. This part features lower reverse leakage current (40 µA @ 1 V), which may provide improved performance in low-current applications.

KDZVTFTR3.9B (Rohm Semiconductor) is qualified to AEC-Q101 automotive standards and rated for 150°C operating temperature, providing enhanced reliability for automotive and high-temperature applications. The 4.15 V nominal rating and 40 µA reverse leakage current match KDZVTR3.9B specifications.

All three substitute parts are actively manufactured, ROHS3 compliant, and maintain the SOD-123F package and 1 W power rating required for direct mechanical and thermal compatibility.

Frequently Asked Questions (FAQ)

Q: Can KDZVTR3.6B be used as a direct replacement for DZ2W03900L?

A: KDZVTR3.6B maintains the same SOD-123F package, 1 W power rating, and identical reverse leakage current (60 µA @ 1 V). The nominal Zener voltage of 3.8 V represents a -2.56% deviation from the 3.9 V specification. Substitution is valid for applications where circuit design tolerates this voltage variation.

Q: What is the voltage difference between the substitute parts?

A: KDZVTR3.6B is rated at 3.8 V nominal. Both KDZVTR3.9B and KDZVTFTR3.9B are rated at 4.15 V nominal. The voltage spread across available substitutes is 0.35 V, requiring circuit-level evaluation to determine acceptable tolerance.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original DZ2W03900L is RoHS Compliant. All three substitute parts (KDZVTFTR3.9B, KDZVTR3.9B, and KDZVTR3.6B) are ROHS3 Compliant, meeting current environmental standards.

Q: Do the substitute parts have the same package footprint?

A: Yes. All substitute parts use the SOD-123F package, identical to the DZ2W03900L. No PCB layout modifications are required for mechanical compatibility.

Q: What is the difference between KDZVTR3.9B and KDZVTFTR3.9B?

A: Both parts share identical electrical specifications (4.15 V nominal, 1 W power, 40 µA reverse leakage). KDZVTFTR3.9B includes AEC-Q101 automotive qualification and is rated for 150°C operating temperature, making it suitable for automotive and high-temperature applications.

Q: Which substitute part has the best availability?

A: KDZVTR3.9B has the highest inventory level at 150,200 pcs. KDZVTFTR3.9B has 11,949 pcs available. KDZVTR3.6B has 6,200 pcs available.

Q: Can moisture sensitivity affect component selection?

A: All parts, including the original and substitutes, have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related handling restrictions during assembly or storage.