MM5Z30V Equivalent & Substitute Parts

Part Overview

The MM5Z30V is a 30 V Zener diode manufactured by onsemi in the SOD-523F surface mount package with 200 mW power dissipation capability. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates across a temperature range of -55°C to 150°C with ±7% voltage tolerance and is suitable for voltage regulation and protection applications in surface mount designs.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	30	V
Power - Maximum	200	mW
Tolerance	±7%	—
Impedance (Maximum)	80	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 21 V
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-79, SOD-523F	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MM5Z30V is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 30 V nominal
Mounting type: Surface mount
Moisture sensitivity level: 1 (Unlimited)
Operating temperature range: Minimum -55°C to maximum 150°C

Secondary Compatibility Factors:

Power dissipation: Equal to or greater than 200 mW
Impedance: 80 Ohms or lower
Reverse leakage current: 50 nA @ 21 V or lower
Voltage tolerance: ±7% or tighter

Package Considerations: Substitutes are grouped by package type. The MM5Z30V uses SOD-523F. Direct substitutes maintain this package. Functional equivalents may use alternative surface mount packages (SOD-523, SOD-323F) with identical electrical performance.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Power (mW)	Tolerance	Zzt (Ohms)	Ir @ Vr (nA)	Temp Range (°C)	Package	Status
MM5Z30V	onsemi	30	200	±7%	80	50 @ 21V	-55 to 150	SOD-523F	Obsolete
SZMM5Z30VT1G	onsemi	30	500	±6.7%	80	50 @ 21V	-65 to 150	SOD-523	Active
BZX584C30_R1_00001	Panjit International Inc.	30	200	±5%	80	100 @ 21V	-55 to 150	SOD-523	Active
BZX585-B30,115	Nexperia USA Inc.	30	300	±2%	80	50 @ 21V	-65 to 150	SOD-523	Active
BZX585-C30,115	Nexperia USA Inc.	30	300	±5%	80	50 @ 21V	-65 to 150	SOD-523	Active
BZT52H-C30,115	NXP Semiconductors	30	375	±5%	40	50 @ 21V	-65 to 150	SOD-123F	Active
BZX84J-C30,115	Nexperia USA Inc.	30	550	±5%	40	50 @ 21V	-65 to 150	SOD-323F	Active
BZX84J-B30,115	Nexperia USA Inc.	30	550	±2%	40	50 @ 21V	-65 to 150	SOD-323F	Active
PZU30B,115	Nexperia USA Inc.	30	310	±5%	40	50 @ 23V	-65 to 150	SOD-323F	Active

Engineering Selection Recommendations

Direct Equivalent (Same Package): SZMM5Z30VT1G and BZX584C30_R1_00001 maintain the SOD-523 package footprint compatible with MM5Z30V PCB layouts. SZMM5Z30VT1G is an onsemi product with active status and AEC-Q101 automotive qualification. BZX584C30_R1_00001 provides identical 200 mW power rating with tighter ±5% tolerance and active product status.

Functional Equivalents (Enhanced Performance): BZX585-B30,115 and BZX585-C30,115 offer 300 mW power dissipation in SOD-523 package with active status and AEC-Q100 automotive qualification. Both maintain 80 Ohm impedance and -65°C lower operating temperature limit.

Alternative Package Options: BZT52H-C30,115 (SOD-123F), BZX84J-C30,115 (SOD-323F), BZX84J-B30,115 (SOD-323F), and PZU30B,115 (SOD-323F) provide higher power dissipation (310–550 mW) with lower impedance (40 Ohms) and extended temperature range (-65°C to 150°C). These require PCB layout modification due to different package geometry.

Compliance Considerations: All active substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating. Automotive-grade options include SZMM5Z30VT1G (AEC-Q101), BZT52H-C30,115 (AEC-Q101), BZX84J-C30,115 (AEC-Q101), BZX84J-B30,115 (AEC-Q101), and BZX585 series (AEC-Q100).

Frequently Asked Questions (FAQ)

Q: Can SZMM5Z30VT1G directly replace MM5Z30V without PCB modification?

A: Yes. SZMM5Z30VT1G uses SOD-523 package, which is footprint-compatible with SOD-523F. Both are surface mount packages with identical lead spacing and mounting requirements. The part is manufactured by onsemi with active product status and AEC-Q101 qualification.

Q: What is the difference between BZX585-B30,115 and BZX585-C30,115?

A: Both parts are identical except for voltage tolerance. BZX585-B30,115 specifies ±2% tolerance, while BZX585-C30,115 specifies ±5% tolerance. Both provide 300 mW power dissipation, 80 Ohm impedance, and SOD-523 package. Selection depends on circuit tolerance requirements.

Q: Why do some substitutes have lower impedance (40 Ohms vs. 80 Ohms)?

A: Lower impedance indicates better voltage regulation characteristics and lower dynamic resistance. Parts with 40 Ohm impedance (BZT52H-C30,115, BZX84J series, PZU30B,115) provide superior performance in applications requiring tighter voltage regulation. This is a beneficial characteristic for substitution.

Q: Are BZX84J-C30,115 and PZU30B,115 suitable for designs originally using MM5Z30V?

A: Both parts meet the 30 V zener voltage and reverse leakage specifications. However, they use SOD-323F package instead of SOD-523F, requiring PCB layout changes. Both are active products with automotive qualification (AEC-Q101 and AEC-Q100 respectively) and extended temperature range (-65°C to 150°C).

Q: What is the significance of AEC-Q101 and AEC-Q100 qualifications?

A: AEC-Q101 and AEC-Q100 are automotive-grade qualifications indicating the parts meet stringent reliability and performance standards for automotive applications. All active substitutes listed carry one of these qualifications, ensuring suitability for automotive and industrial environments.

Q: Can I use BZX584C30_R1_00001 as a direct replacement?

A: Yes. BZX584C30_R1_00001 maintains 200 mW power rating, 80 Ohm impedance, and SOD-523 package compatibility. It offers tighter ±5% tolerance compared to MM5Z30V's ±7%. Reverse leakage is 100 nA @ 21 V, which is acceptable for most applications. Product status is active with ROHS3 compliance.

Q: What are the thermal considerations when selecting a substitute?

A: MM5Z30V operates from -55°C to 150°C. Most active substitutes extend the lower limit to -65°C, providing broader thermal coverage. Power dissipation capability varies from 200 mW (MM5Z30V, BZX584C30_R1_00001) to 550 mW (BZX84J series). Higher power ratings provide thermal margin in current-limited applications.

Q: Is SZMM5Z30VT1G available in higher quantities than MM5Z30V?

A: Yes. SZMM5Z30VT1G has 110,100 pieces in stock compared to 1,104 pieces for MM5Z30V. SZMM5Z30VT1G is supplied in Tape & Reel packaging suitable for automated assembly, while MM5Z30V is obsolete with limited availability.

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