DZ2W04300L Zener Diode Equivalent & Substitute Parts

Part Overview

The DZ2W04300L is a 4.3 V, 1 W surface mount zener diode manufactured by Panasonic Electronic Components in the SOD-123F package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent substitute parts for ongoing design requirements and production needs. Substitute parts must maintain electrical compatibility across voltage regulation, power dissipation, and reverse leakage characteristics while supporting the same surface mount package configuration.

Substiute Parts

DZ2W04300L

Panasonic Electronic ComponentsIn Stock: 4391DZ2W04300L Datasheet

Current PartRFQ

KDZVTFTR4.3B

Rohm SemiconductorIn Stock: 2010KDZVTFTR4.3B Datasheet

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KDZVTR3.9B

Rohm SemiconductorIn Stock: 150278KDZVTR3.9B Datasheet

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KDZVTR4.3B

Rohm SemiconductorIn Stock: 6770KDZVTR4.3B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DZ2W04300L is determined by the following critical parameters:

Primary Substitution Criteria:

• Zener voltage nominal rating within the tolerance band of the original specification
• Maximum power dissipation rating of 1 W or greater
• Surface mount package configuration (SOD-123F)
• Reverse leakage current performance at specified voltage
• RoHS compliance status

Substitute Classification:

The three identified substitute parts (KDZVTFTR4.3B, KDZVTR3.9B, KDZVTR4.3B) are all manufactured by Rohm Semiconductor and share the SOD-123F package footprint with the original part. These substitutes operate at nominal zener voltages of 4.15 V to 4.55 V, which fall within acceptable operating ranges for circuits designed around the 4.3 V specification. All substitute parts maintain the 1 W power rating and surface mount configuration required for direct replacement in existing PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

KDZVTFTR4.3B (Rohm Semiconductor): This part is qualified to AEC-Q101 automotive standards and carries ROHS3 compliance. The nominal zener voltage of 4.55 V represents a 5.1% deviation from the original 4.3 V specification. This part exhibits superior reverse leakage performance (20 µA versus 50 µA) and is actively manufactured with established supply availability (1904 units in stock).

KDZVTR3.9B (Rohm Semiconductor): This part operates at a nominal zener voltage of 4.15 V, representing a 3.5% deviation from the original specification. Reverse leakage current is 40 µA at 1 V. This substitute maintains ROHS3 compliance and demonstrates the highest inventory availability (150200 units in stock) among all identified alternatives.

KDZVTR4.3B (Rohm Semiconductor): This part operates at a nominal zener voltage of 4.55 V, matching the voltage rating of KDZVTFTR4.3B but without automotive qualification. Reverse leakage performance is equivalent at 20 µA. This part maintains ROHS3 compliance with moderate inventory availability (6695 units in stock).

All three substitute parts are actively manufactured and available, eliminating supply chain risk associated with the discontinued DZ2W04300L. Selection among these alternatives depends on circuit voltage tolerance requirements and automotive qualification needs.

Frequently Asked Questions (FAQ)

Q: Can KDZVTR3.9B be used as a direct replacement for DZ2W04300L?

A: KDZVTR3.9B operates at a nominal zener voltage of 4.15 V compared to the original 4.3 V specification, representing a 3.5% deviation. This part is electrically compatible for applications where the circuit design accommodates this voltage variation within its tolerance band. The SOD-123F package footprint is identical, enabling direct PCB placement without layout modifications.

Q: What is the significance of the reverse leakage current difference between the original part and substitutes?

A: The DZ2W04300L specifies 50 µA reverse leakage at 1 V. KDZVTFTR4.3B and KDZVTR4.3B both specify 20 µA at the same condition, representing improved leakage performance. KDZVTR3.9B specifies 40 µA. Lower reverse leakage current reduces standby power consumption and improves circuit efficiency. This difference is not a barrier to substitution but represents an enhancement in substitute parts.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original DZ2W04300L is RoHS Compliant. All three substitute parts (KDZVTFTR4.3B, KDZVTR3.9B, KDZVTR4.3B) are ROHS3 Compliant, meeting current regulatory requirements for hazardous substance restrictions.

Q: What is the difference between KDZVTFTR4.3B and KDZVTR4.3B?

A: Both parts operate at the same nominal zener voltage of 4.55 V and share identical electrical specifications. KDZVTFTR4.3B carries AEC-Q101 automotive qualification, making it suitable for automotive applications. KDZVTR4.3B does not carry automotive qualification. Selection depends on application requirements and automotive compliance needs.

Q: Can these parts be used interchangeably in the same circuit?

A: KDZVTR3.9B, KDZVTR4.3B, and KDZVTFTR4.3B all share the SOD-123F package and 1 W power rating, enabling mechanical interchangeability on the PCB. Electrical interchangeability depends on circuit voltage tolerance specifications. Circuits designed with ±5% voltage tolerance around 4.3 V accommodate all three substitutes. Circuits with tighter voltage specifications require evaluation of the specific zener voltage deviation.

Q: What is the moisture sensitivity level, and does it affect substitution?

A: All parts, including the original DZ2W04300L and all substitutes, carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions. This parameter does not differentiate substitution suitability.

Q: Is inventory availability a factor in part selection?

A: Inventory availability is provided for reference. KDZVTR3.9B demonstrates the highest stock level (150200 units), followed by KDZVTR4.3B (6695 units) and KDZVTFTR4.3B (1904 units). Availability should be verified with current suppliers, as inventory levels change continuously.