DZ2J180M0L Zener Diode Equivalent & Substitute Parts

Part Overview

The DZ2J180M0L is an 18 V, 200 mW surface mount zener diode manufactured by Panasonic Electronic Components in the SMini2-F5-B package. This component is designed for voltage regulation and protection applications requiring precise 18 V reference voltage with ±2.5% tolerance. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain the 18 V nominal zener voltage, 200 mW power rating, and surface mount configuration to ensure direct replacement capability in existing circuit designs.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	18	V
Tolerance	±2.5%	-
Power - Max	200	mW
Impedance (Max)	60	Ohms
Current - Reverse Leakage @ Vr	50 nA @ 13 V	-
Voltage - Forward (Vf) (Max) @ If	1 V @ 10 mA	-
Mounting Type	Surface Mount	-
Package / Case	SC-90, SOD-323F	-
RoHS Status	RoHS Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the DZ2J180M0L is determined by the following critical parameters:

Primary Matching Criteria:

Nominal zener voltage of 18 V
Maximum power dissipation of 200 mW or greater
Surface mount configuration
Package compatibility with SC-90 or SOD-323F footprints

Secondary Compatibility Factors:

Voltage tolerance (±2.5% or tighter preferred for precision applications)
Impedance characteristics (maximum 60 Ohms or lower)
Reverse leakage current specifications
Forward voltage characteristics
RoHS compliance status

The substitute parts identified below meet the primary matching criteria and maintain functional equivalence for standard voltage regulation and protection applications. Tolerance variations and impedance differences are noted for applications requiring precise voltage reference performance.

Parameter Comparison

Parameter	DZ2J180M0L (Main)	BZX584C18_R1_00001	TDZTR18	UDZSTE-1718B	UDZVFHTE-1718B	UDZVTE-1718B
Manufacturer	Panasonic	Panjit International	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor
Voltage - Zener (Nom)	18 V	18 V	18 V	18 V	18 V	18 V
Tolerance	±2.5%	±5%	±10%	±2%	±2.19%	-
Power - Max	200 mW	200 mW	500 mW	200 mW	200 mW	200 mW
Impedance (Max)	60 Ohms	45 Ohms	-	65 Ohms	65 Ohms	65 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 13 V	100 nA @ 12.6 V	10 µA @ 12 V	100 nA @ 13 V	100 nA @ 13 V	100 nA @ 13 V
Voltage - Forward (Vf) (Max) @ If	1 V @ 10 mA	900 mV @ 10 mA	-	-	-	-
Operating Temperature	-	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	150°C (TJ)	-55°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-90, SOD-323F	SC-79, SOD-523	2-SMD, Flat Lead	SC-90, SOD-323F	SC-90, SOD-323F	SC-90, SOD-323F
Product Status	Discontinued	Active	Active	Active	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Package-Compatible Substitutes (SC-90, SOD-323F):

UDZSTE-1718B, UDZVFHTE-1718B, and UDZVTE-1718B from Rohm Semiconductor are direct footprint replacements for the DZ2J180M0L. All three parts maintain the SC-90/SOD-323F package configuration, 18 V nominal voltage, and 200 mW power rating. UDZSTE-1718B offers ±2% tolerance, providing tighter voltage regulation than the original ±2.5% specification. UDZVFHTE-1718B includes AEC-Q101 automotive qualification and is suitable for applications requiring automotive-grade reliability. UDZVTE-1718B provides the highest inventory availability with 95,100 pieces in stock and operates across the full -55°C to 150°C temperature range.

Alternative Package Substitutes:

BZX584C18_R1_00001 from Panjit International provides equivalent electrical performance with 18 V nominal voltage and 200 mW power rating. This part uses the SOD-523 package (SC-79), which differs from the original SMini2-F5-B footprint and requires PCB layout verification before implementation. The ±5% tolerance is wider than the original specification.

TDZTR18 from Rohm Semiconductor offers increased power dissipation capability at 500 mW, suitable for applications requiring higher thermal margin. This part uses the TUMD2 package configuration and exhibits higher reverse leakage current (10 µA @ 12 V) compared to the original specification.

Compliance and Availability:

All substitute parts maintain RoHS3 compliance and MSL Level 1 (unlimited moisture sensitivity). UDZVTE-1718B offers the highest active inventory status with 95,100 pieces available. UDZSTE-1718B provides 49,595 pieces in stock. All recommended substitutes are currently active products with established supply chains.

Frequently Asked Questions (FAQ)

Q: Can BZX584C18_R1_00001 be used as a direct replacement for DZ2J180M0L?

A: BZX584C18_R1_00001 provides electrical equivalence with 18 V nominal voltage and 200 mW power rating. However, the SOD-523 package differs from the original SMini2-F5-B footprint. PCB layout and land pattern compatibility must be verified before substitution. The ±5% tolerance is wider than the original ±2.5% specification.

Q: What is the difference between UDZSTE-1718B and UDZVTE-1718B?

A: Both parts share identical electrical specifications (18 V, 200 mW, SC-90/SOD-323F package) and are direct footprint replacements. UDZSTE-1718B specifies ±2% tolerance, while UDZVTE-1718B does not specify tolerance in the provided data. UDZVTE-1718B offers significantly higher inventory availability (95,100 pieces versus 49,595 pieces).

Q: Is UDZVFHTE-1718B suitable for automotive applications?

A: UDZVFHTE-1718B carries AEC-Q101 automotive qualification and is designated as automotive-grade. This part is appropriate for applications requiring automotive reliability standards. Operating temperature is specified as 150°C (TJ) maximum.

Q: Why does TDZTR18 have higher reverse leakage current than other substitutes?

A: TDZTR18 specifies 10 µA reverse leakage current at 12 V, compared to 50-100 nA for other substitutes. This characteristic is inherent to the TUMD2 package design and Rohm's manufacturing process. Applications sensitive to leakage current should select alternatives with lower leakage specifications.

Q: Can TDZTR18 be used in place of DZ2J180M0L despite the higher power rating?

A: TDZTR18 provides 500 mW power dissipation versus the original 200 mW specification. This higher rating does not prevent substitution; the part operates safely at lower power levels. However, the higher reverse leakage current (10 µA) may affect precision voltage regulation applications. Package configuration (TUMD2) differs from the original and requires PCB layout verification.

Q: Are all substitute parts RoHS compliant?

A: All identified substitute parts maintain ROHS3 compliance status. The original DZ2J180M0L is RoHS Compliant. All parts carry MSL Level 1 (unlimited) moisture sensitivity rating.

Q: What is the impedance difference between substitutes, and does it matter?

A: Impedance values range from 45 Ohms (BZX584C18_R1_00001) to 65 Ohms (Rohm UMD2 package parts), compared to 60 Ohms for the original. Lower impedance provides better high-frequency performance and faster transient response. For standard voltage regulation applications, impedance differences within this range are not critical. Precision reference applications may benefit from lower impedance values.

Q: Which substitute offers the best inventory availability?

A: UDZVTE-1718B from Rohm Semiconductor provides the highest inventory with 95,100 pieces in stock. This part is a direct footprint replacement with SC-90/SOD-323F package compatibility and active product status.

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