DZ2S030M0L Zener Diode Equivalent & Substitute Parts

Part Overview

The DZ2S030M0L is a 3 V, 150 mW surface mount zener diode manufactured by Panasonic Electronic Components in the SC-79/SOD-523 package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. The part operates as a voltage regulation and protection element in electronic circuits requiring precise 3 V reference voltage with ±2.5% tolerance and 150 mW maximum power dissipation capability.

Substiute Parts

DZ2S030M0L

Panasonic Electronic ComponentsIn Stock: 1198DZ2S030M0L Datasheet

Current PartRFQ

BZX585-B3V0,135

Nexperia USA Inc.In Stock: 9213BZX585-B3V0,135 Datasheet

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EDZVFHT2R3.0B

Rohm SemiconductorIn Stock: 16854EDZVFHT2R3.0B Datasheet

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EDZVT2R3.0B

Rohm SemiconductorIn Stock: 44105EDZVT2R3.0B Datasheet

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SZMM5Z3V0T1G

onsemiIn Stock: 9655SZMM5Z3V0T1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DZ2S030M0L is determined by the following critical parameters:

Primary Matching Criteria:

• Zener voltage: 3 V nominal
• Package type: SC-79 or SOD-523 surface mount
• Mounting type: Surface mount
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Secondary Compatibility Factors:

• Power rating: 150 mW or higher
• Voltage tolerance: ±2.5% or tighter
• Impedance: 120 Ohms or lower
• Reverse leakage current: 50 µA @ 1 V or lower

Substitute parts are grouped based on whether they meet the primary criteria while maintaining electrical performance within acceptable ranges. Parts with higher power ratings (300 mW, 500 mW) are suitable substitutes as they provide enhanced thermal margin. Tolerance variations and impedance differences are acceptable provided they remain within standard zener diode specifications for the 3 V class.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: EDZVT2R3.0B

The EDZVT2R3.0B from Rohm Semiconductor is the preferred substitute for the DZ2S030M0L. This part maintains identical zener voltage (3 V), power rating (150 mW), impedance (120 Ohms), and reverse leakage current (50 µA @ 1 V) specifications. The EDZVT2R3.0B features ±2% tolerance, which is tighter than the original ±2.5%, providing improved voltage regulation accuracy. The part is currently active in production with extended operating temperature range (-55°C ~ 150°C), ROHS3 compliance, and MSL 1 rating. The EMD2 package is mechanically and electrically compatible with the SC-79/SOD-523 footprint.

Secondary Recommendation: BZX585-B3V0,135

The BZX585-B3V0,135 from Nexperia USA Inc. provides enhanced performance characteristics suitable for applications requiring higher power dissipation margin. This part maintains the 3 V zener voltage and SOD-523 package compatibility while offering 300 mW maximum power rating (double the original specification). The impedance is reduced to 95 Ohms and reverse leakage current is 10 µA @ 1 V, both superior to the original part. The BZX585-B3V0,135 includes automotive qualification (AEC-Q100) and operates across -65°C ~ 150°C temperature range. This part is currently active in production.

Tertiary Recommendation: SZMM5Z3V0T1G

The SZMM5Z3V0T1G from onsemi is suitable for applications requiring maximum thermal headroom. This part maintains 3 V zener voltage and SOD-523 package compatibility while providing 500 mW maximum power rating. The impedance is 100 Ohms and reverse leakage current is 10 µA @ 1 V. The tolerance specification is ±7%, which is wider than the original ±2.5%, and should be evaluated for applications with strict voltage regulation requirements. The part includes automotive qualification (AEC-Q101) and operates across -65°C ~ 150°C temperature range. This part is currently active in production.

Not Recommended: EDZVFHT2R3.0B

The EDZVFHT2R3.0B from Rohm Semiconductor matches the original part specifications but carries a "Not For New Designs" product status designation, indicating this part is in end-of-life phase. While electrically compatible, this part should not be selected for new circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the BZX585-B3V0,135 with 300 mW power rating be used as a direct replacement for the 150 mW DZ2S030M0L?

A: Yes. The BZX585-B3V0,135 maintains identical zener voltage (3 V) and package type (SOD-523). The higher power rating (300 mW versus 150 mW) provides additional thermal margin and does not create compatibility issues. The part will function correctly in circuits designed for the original 150 mW specification.

Q: What is the significance of the ±2% tolerance in the EDZVT2R3.0B compared to the ±2.5% tolerance of the DZ2S030M0L?

A: The ±2% tolerance specification indicates tighter voltage regulation accuracy. The EDZVT2R3.0B will maintain the 3 V zener voltage within a narrower band (2.94 V to 3.06 V) compared to the original part (2.925 V to 3.075 V). This tighter tolerance is beneficial for precision voltage reference applications and represents an improvement over the original specification.

Q: Are the EMD2 and SOD-523 packages mechanically interchangeable on the same PCB footprint?

A: The EMD2 package designation refers to the Rohm Semiconductor supplier device package, which is physically and electrically compatible with the SC-79/SOD-523 standard package outline. Both EDZVT2R3.0B and EDZVFHT2R3.0B utilize this compatible package format and can be mounted on PCBs designed for the original DZ2S030M0L.

Q: Why does the SZMM5Z3V0T1G have a ±7% tolerance specification?

A: The ±7% tolerance is a characteristic of the SZMM5Z3V0T1G design from onsemi. While wider than the original ±2.5% specification, this part remains suitable for applications where voltage regulation tolerance is not the primary design constraint. Applications requiring tighter voltage accuracy should select the EDZVT2R3.0B or BZX585-B3V0,135.

Q: What is the difference between AEC-Q100 and AEC-Q101 qualifications?

A: Both AEC-Q100 and AEC-Q101 are automotive qualification standards. AEC-Q100 applies to discrete semiconductors including diodes, while AEC-Q101 applies to optoelectronic devices. The BZX585-B3V0,135 carries AEC-Q100 qualification, and the SZMM5Z3V0T1G carries AEC-Q101 qualification. Both qualifications indicate automotive-grade reliability and testing compliance.

Q: Can the DZ2S030M0L be replaced with a part having lower reverse leakage current?

A: Yes. The BZX585-B3V0,135 and SZMM5Z3V0T1G both feature 10 µA @ 1 V reverse leakage current, compared to the original 50 µA @ 1 V specification. Lower reverse leakage current is advantageous in precision applications and represents an improvement. These parts are suitable substitutes.

Q: Is the MSL 1 (Unlimited) rating consistent across all substitute parts?

A: Yes. All substitute parts listed (BZX585-B3V0,135, EDZVFHT2R3.0B, EDZVT2R3.0B, and SZMM5Z3V0T1G) carry MSL 1 (Unlimited) moisture sensitivity level rating, identical to the original DZ2S030M0L. This ensures equivalent handling and storage requirements.

Q: Which substitute part is most suitable for automotive applications?

A: Both the BZX585-B3V0,135 (AEC-Q100 qualified) and SZMM5Z3V0T1G (AEC-Q101 qualified) are suitable for automotive applications. The BZX585-B3V0,135 is the preferred choice due to its tighter tolerance (±2%), lower impedance (95 Ohms), and active production status with extended temperature range (-65°C ~ 150°C).