DZ2S20000L Zener Diode Equivalent & Substitute Parts

Part Overview

The Panasonic DZ2S20000L is a 20 V, 150 mW Zener diode in surface mount SSMini2-F5-B packaging. This component is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement. The part operates as a voltage regulation and protection element in electronic circuits requiring 20 V reference voltage with 150 mW power dissipation capability.

Substiute Parts

DZ2S20000L

Panasonic Electronic ComponentsIn Stock: 5072DZ2S20000L Datasheet

Current PartRFQ

BZX585-B20,115

Nexperia USA Inc.In Stock: 12241BZX585-B20,115 Datasheet

SimilarRFQ

EDZVFHT2R20B

Rohm SemiconductorIn Stock: 4603EDZVFHT2R20B Datasheet

SimilarRFQ

EDZVT2R20B

Rohm SemiconductorIn Stock: 29423EDZVT2R20B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DZ2S20000L is determined by strict equivalence across the following critical parameters:

Primary Matching Criteria:

• Voltage - Zener (Nom): 20 V (exact match required)
• Mounting Type: Surface Mount
• Package / Case: SC-79, SOD-523 (physical and electrical compatibility)
• Power - Max: 150 mW or greater (equal or higher rating acceptable)
• RoHS Compliance: Required for regulatory alignment

Secondary Compatibility Parameters:

• Tolerance: ±5% or tighter acceptable
• Impedance (Max): 80 Ohms or lower acceptable
• Current - Reverse Leakage: 50 nA or lower acceptable
• Voltage - Forward (Vf): 1 V or lower acceptable

All identified substitute parts meet or exceed the primary matching criteria and maintain compatibility within the secondary parameters. Substitutes are grouped by manufacturer and product status (active vs. discontinued).

Parameter Comparison

Engineering Selection Recommendations

EDZVT2R20B (Rohm Semiconductor) - Primary Substitute

The EDZVT2R20B is the optimal substitute for the DZ2S20000L. This part maintains identical zener voltage (20 V), power rating (150 mW), and package configuration (SC-79, SOD-523). The EDZVT2R20B is active in production with 29,400 units in stock, ensuring long-term availability. Tolerance is tightened to ±2%, and impedance is marginally higher at 85 Ohms versus 80 Ohms, representing negligible operational difference. RoHS3 compliance and unlimited moisture sensitivity level align with the original part specifications. Operating temperature range of -55°C to 150°C provides extended environmental coverage.

EDZVFHT2R20B (Rohm Semiconductor) - Secondary Substitute

The EDZVFHT2R20B serves as an alternative with automotive-grade qualification (AEC-Q101). This part matches the DZ2S20000L in zener voltage, power rating, and package type. Tolerance is ±2.18%, and impedance is 85 Ohms. The maximum junction temperature rating of 150°C is specified. This part is active with 4,538 units in stock. Selection of this variant is appropriate for applications requiring automotive-grade components.

BZX585-B20,115 (Nexperia USA Inc.) - Higher Power Alternative

The BZX585-B20,115 provides a 20 V zener with doubled power dissipation capability (300 mW versus 150 mW). This part is suitable for applications requiring enhanced thermal margin or higher current handling. The impedance is improved at 55 Ohms. Automotive qualification (AEC-Q100) and active production status (12,197 units in stock) support deployment in demanding environments. Operating temperature range of -65°C to 150°C extends low-temperature performance. Selection of this part is appropriate when circuit design permits the higher power rating and when automotive compliance is required.

Frequently Asked Questions (FAQ)

Q: Can the EDZVT2R20B directly replace the DZ2S20000L without circuit modification?

A: Yes. Both parts share identical zener voltage (20 V), power rating (150 mW), and package configuration (SC-79, SOD-523). The EDZVT2R20B exhibits tighter tolerance (±2% versus ±5%) and marginally higher impedance (85 Ohms versus 80 Ohms), both of which represent improvements or negligible differences in circuit operation. No circuit modification is required.

Q: What is the difference between the two Rohm substitutes, EDZVT2R20B and EDZVFHT2R20B?

A: Both parts are functionally equivalent for the DZ2S20000L substitution. The EDZVFHT2R20B carries automotive-grade qualification (AEC-Q101) with a maximum junction temperature of 150°C. The EDZVT2R20B provides a wider operating temperature range (-55°C to 150°C) without automotive-specific qualification. Selection depends on application requirements: choose EDZVFHT2R20B for automotive applications; choose EDZVT2R20B for general industrial or consumer applications requiring extended low-temperature performance.

Q: Why is the BZX585-B20,115 rated for 300 mW instead of 150 mW?

A: The BZX585-B20,115 is a higher-power variant of the 20 V zener diode family. The increased power rating (300 mW) reflects enhanced thermal design and larger die size within the same SOD-523 package. This part is suitable for circuits requiring higher current handling or thermal margin. If the original circuit design specifies 150 mW operation, the BZX585-B20,115 operates within its safe operating area and provides additional design margin.

Q: Are all substitute parts RoHS compliant?

A: Yes. The DZ2S20000L is RoHS Compliant. All substitute parts (EDZVT2R20B, EDZVFHT2R20B, and BZX585-B20,115) are ROHS3 Compliant, meeting current regulatory requirements. ROHS3 compliance is a superset of RoHS compliance and includes additional restricted substances.

Q: What is the significance of the ±2% tolerance on the Rohm parts versus ±5% on the original?

A: Tighter tolerance (±2%) indicates more precise zener voltage regulation compared to the original ±5% specification. In voltage regulation and protection circuits, tighter tolerance reduces voltage variation across the component population, improving circuit performance consistency. The Rohm substitutes provide this benefit without requiring circuit redesign.

Q: Can the BZX585-B20,115 be used in a circuit designed for 150 mW operation?

A: Yes. The BZX585-B20,115 is rated for 300 mW maximum power dissipation. If the circuit design dissipates 150 mW or less, the part operates well within its safe operating area. The higher power rating provides additional thermal margin and does not negatively impact circuit operation. This substitution is appropriate for applications where enhanced reliability or thermal headroom is beneficial.

Q: Are there package or footprint differences between the substitutes?

A: No. All substitute parts use the SC-79 or SOD-523 package designation, which defines identical physical dimensions and land pattern. The parts are footprint-compatible and require no PCB layout modification. Supplier device packages differ (SSMini2-F5-B for the original, SOD-523 or EMD2 for substitutes), but these designations refer to the same physical package with identical electrical performance.

Q: What is the moisture sensitivity level, and why is it important?

A: Moisture Sensitivity Level (MSL) 1 indicates unlimited moisture exposure tolerance. All parts in this comparison carry MSL 1 rating, meaning they do not require special moisture control during storage, handling, or assembly. This specification ensures compatibility with standard manufacturing processes and storage conditions.