DZ2J043M0L Zener Diode Equivalent & Substitute Parts

Part Overview

The DZ2J043M0L is a 4.3 V, 200 mW surface mount zener diode manufactured by Panasonic Electronic Components in the SC-90/SOD-323F package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. The part operates as a voltage regulation and protection element in electronic circuits requiring precise zener voltage characteristics at low power dissipation levels.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	4.3	V
Tolerance	±2.5%	-
Power - Max	200	mW
Impedance (Max)	130	Ohms
Current - Reverse Leakage @ Vr	10	µA @ 1 V
Mounting Type	Surface Mount	-
Package / Case	SC-90, SOD-323F	-
RoHS Status	RoHS Compliant	-

Substitute Part Grouping Explanation

Substitution of the DZ2J043M0L is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 4.3 V nominal
Power dissipation rating: 200 mW or higher
Surface mount packaging: SC-90/SOD-323F or compatible
RoHS compliance status

Secondary Compatibility Factors:

Voltage tolerance: ±2.5% or tighter
Impedance characteristics: Maximum 130 Ohms or lower
Reverse leakage current: 10 µA @ 1 V or lower
Operating temperature range: -55°C to 150°C or equivalent

Substitute parts are grouped into two categories based on power rating alignment:

Category A - Direct Power Rating Match (200 mW): Parts with identical 200 mW maximum power dissipation, maintaining the same thermal and electrical operating envelope as the original component.

Category B - Higher Power Rating (500 mW): Parts with 500 mW maximum power dissipation, providing enhanced thermal margin and reverse leakage performance while maintaining the same zener voltage and package compatibility.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Ir @ 1V (µA)	Package	Status
DZ2J043M0L	Panasonic	4.3	±2.5%	200	130	10	SOD-323F	Discontinued
BZT52-C4V3S_R1_00001	Panjit International	4.3	±5%	200	95	5	SOD-323F	Active
UDZSTE-174.3B	Rohm Semiconductor	4.3	±3%	200	100	5	SOD-323F	Active
UDZVFHTE-174.3B	Rohm Semiconductor	4.3	±3.02%	200	100	5	SOD-323F	Active
UDZVTE-174.3B	Rohm Semiconductor	4.3	-	200	100	5	SOD-323F	Active
TFZVTR4.3B	Rohm Semiconductor	4.3	-	500	40	5	TUMD2M	Active
YFZVFHTR4.3B	Rohm Semiconductor	4.3	±3.02%	500	40	5	TUMD2M	Active

Engineering Selection Recommendations

Direct Substitutes (200 mW Category):

The UDZSTE-174.3B, UDZVFHTE-174.3B, and UDZVTE-174.3B from Rohm Semiconductor provide direct functional equivalence to the DZ2J043M0L. All three maintain the 4.3 V zener voltage, 200 mW power rating, and SOD-323F package footprint. These parts are manufactured by an established semiconductor supplier with active product status and ROHS3 compliance. The UDZSTE-174.3B and UDZVTE-174.3B offer standard industrial temperature range (-55°C to 150°C), while the UDZVFHTE-174.3B includes automotive-grade qualification (AEC-Q101) with maximum junction temperature of 150°C.

The BZT52-C4V3S_R1_00001 from Panjit International Inc. meets the core electrical specifications with 4.3 V nominal voltage and 200 mW power rating in SOD-323F packaging. This part exhibits lower impedance (95 Ohms) and reduced reverse leakage (5 µA @ 1 V) compared to the original, with active product status and ROHS3 compliance.

Higher Power Alternatives (500 mW Category):

The TFZVTR4.3B and YFZVFHTR4.3B from Rohm Semiconductor provide 500 mW power dissipation in the TUMD2M package. These parts maintain the 4.3 V zener voltage specification with significantly reduced impedance (40 Ohms) and lower reverse leakage characteristics. The YFZVFHTR4.3B includes automotive-grade qualification (AEC-Q101). Both parts are active products with ROHS3 compliance. Selection of 500 mW alternatives is appropriate when circuit design permits package transition from SOD-323F to TUMD2M and when enhanced thermal performance is beneficial.

Frequently Asked Questions (FAQ)

Q: Can the BZT52-C4V3S_R1_00001 replace the DZ2J043M0L directly?

A: Yes. Both parts share the 4.3 V zener voltage, 200 mW power rating, and SOD-323F package. The BZT52-C4V3S_R1_00001 exhibits tighter impedance control (95 Ohms vs. 130 Ohms) and lower reverse leakage (5 µA vs. 10 µA), making it functionally compatible. The ±5% voltage tolerance is wider than the original ±2.5%, which may require circuit validation in precision voltage regulation applications.

Q: What is the difference between the Rohm 200 mW options?

A: UDZSTE-174.3B, UDZVFHTE-174.3B, and UDZVTE-174.3B all provide 200 mW power dissipation in SOD-323F packaging with 4.3 V zener voltage. The UDZVFHTE-174.3B is automotive-qualified (AEC-Q101) with ±3.02% tolerance. The UDZSTE-174.3B and UDZVTE-174.3B are industrial-grade with ±3% and unspecified tolerance respectively. All three exhibit identical impedance (100 Ohms) and reverse leakage (5 µA @ 1 V) characteristics.

Q: When should I select the 500 mW alternatives?

A: The TFZVTR4.3B and YFZVFHTR4.3B are appropriate when circuit design permits package change from SOD-323F to TUMD2M and when enhanced thermal margin is required. These parts provide lower impedance (40 Ohms) and improved reverse leakage performance. The YFZVFHTR4.3B includes automotive qualification for applications requiring AEC-Q101 compliance.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status. The original DZ2J043M0L is RoHS Compliant. All alternatives meet current environmental and regulatory requirements.

Q: What is the impact of impedance differences?

A: The original DZ2J043M0L specifies 130 Ohms maximum impedance. All substitute parts exhibit equal or lower impedance values (95 to 100 Ohms for 200 mW options; 40 Ohms for 500 mW options). Lower impedance provides improved voltage regulation stability and reduced dynamic resistance, which is beneficial in most applications.

Q: Can I use the automotive-qualified parts in non-automotive applications?

A: Yes. The UDZVFHTE-174.3B and YFZVFHTR4.3B are automotive-qualified but function in any application meeting their electrical specifications. Automotive qualification indicates enhanced reliability testing and stricter manufacturing controls, providing additional assurance for critical applications.

Q: What packaging considerations apply to the 500 mW alternatives?

A: The TFZVTR4.3B and YFZVFHTR4.3B use the TUMD2M package (2-SMD, Flat Lead) instead of the SOD-323F package of the original part. PCB layout and footprint modifications are required. Verify that the TUMD2M package is compatible with your assembly equipment and board design before selection.

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