MAZS0430ML Zener Diode 4.3V 150mW Equivalent & Substitute Parts

Part Overview

The MAZS0430ML is a Panasonic Electronic Components zener diode rated at 4.3 V nominal with 150 mW maximum power dissipation in an SSMini2-F1 surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates with ±3% voltage tolerance and is suitable for voltage regulation and protection applications in surface mount assemblies.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	4.3	V
Tolerance	±3%	—
Power - Max	150	mW
Impedance (Max)	130	Ohms
Current - Reverse Leakage @ Vr	10	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1	V @ 10 mA
Mounting Type	Surface Mount	—
Package / Case	SC-79, SOD-523	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MAZS0430ML is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 4.3 V nominal
Mounting type: Surface mount
Moisture sensitivity: MSL 1 (Unlimited)

Secondary Compatibility Factors:

Power dissipation rating (minimum 150 mW required for direct replacement; higher ratings acceptable)
Voltage tolerance (±3% to ±5% acceptable)
Package compatibility (SOD-523 preferred; SOD-323F and SOD-123F acceptable with PCB layout adjustment)
Impedance characteristics (90–150 Ohms acceptable range)
Reverse leakage current (3–10 µA @ 1 V acceptable)

All substitute parts listed maintain the 4.3 V zener voltage specification and surface mount configuration. Substitutes with higher power ratings provide enhanced thermal margin. Package variants require verification of PCB footprint compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Leakage @ Vr	Package	Product Status
MAZS0430ML	Panasonic	4.3 V	±3%	150 mW	130 Ω	10 µA @ 1 V	SOD-523	Obsolete
BZT585B4V3T-7	Diodes Incorporated	4.3 V	±2%	350 mW	150 Ω	3 µA @ 1 V	SOD-523	Active
BZX585-B4V3,115	Nexperia USA Inc.	4.3 V	±2%	300 mW	90 Ω	3 µA @ 1 V	SOD-523	Active
BZX585-B4V3,135	Nexperia USA Inc.	4.3 V	±2%	300 mW	90 Ω	3 µA @ 1 V	SOD-523	Active
BZT52H-C4V3,115	NXP Semiconductors	4.3 V	±5%	375 mW	95 Ω	3 µA @ 1 V	SOD-123F	Active
BZX84J-C4V3,115	Nexperia USA Inc.	4.3 V	±5%	550 mW	90 Ω	3 µA @ 1 V	SOD-323F	Active
EDZVFHT2R4.3B	Rohm Semiconductor	4.3 V	±3.02%	150 mW	100 Ω	5 µA @ 1 V	SOD-523	Active

Engineering Selection Recommendations

Direct Package Replacement (SOD-523):

BZX585-B4V3,115 and BZX585-B4V3,135 are functionally equivalent to MAZS0430ML with identical package geometry (SOD-523). Both parts are active, AEC-Q100 qualified for automotive applications, and provide 300 mW power rating with improved voltage tolerance (±2%). These parts require no PCB layout modification.

EDZVFHT2R4.3B provides matching power rating (150 mW) and voltage tolerance (±3.02%) in SOD-523 package. This part is active, AEC-Q101 qualified, and suitable for direct substitution with identical thermal characteristics.

BZT585B4V3T-7 offers 350 mW power rating in SOD-523 package with superior ±2% tolerance and active product status. This part provides thermal margin above the original specification.

Alternative Package Options:

BZT52H-C4V3,115 (SOD-123F) and BZX84J-C4V3,115 (SOD-323F) require PCB footprint modification but provide higher power ratings (375 mW and 550 mW respectively) and active product status with automotive qualification. These options are suitable when thermal performance enhancement is required.

Compliance and Availability:

All substitute parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 rating. BZX585-B4V3,115, BZX585-B4V3,135, BZT52H-C4V3,115, BZX84J-C4V3,115, and EDZVFHT2R4.3B are active products with established supply chains and higher inventory levels than the obsolete MAZS0430ML.

Frequently Asked Questions (FAQ)

Q: Can BZX585-B4V3,115 directly replace MAZS0430ML without PCB modification?

A: Yes. Both parts use SOD-523 package geometry. BZX585-B4V3,115 provides 300 mW power rating (double the original 150 mW specification) with improved ±2% voltage tolerance and active product status.

Q: What is the difference between BZX585-B4V3,115 and BZX585-B4V3,135?

A: Both parts are electrically identical with 4.3 V nominal voltage, ±2% tolerance, 300 mW power rating, and SOD-523 package. The suffix difference (115 vs. 135) indicates different packaging configurations (Tape & Reel). Electrical performance is equivalent.

Q: Is EDZVFHT2R4.3B suitable for direct replacement?

A: Yes. EDZVFHT2R4.3B matches the original 150 mW power rating and ±3.02% tolerance in SOD-523 package. This part is active with AEC-Q101 automotive qualification and provides identical thermal performance to MAZS0430ML.

Q: Why would I select BZX84J-C4V3,115 over BZX585-B4V3,115?

A: BZX84J-C4V3,115 provides 550 mW power rating in SOD-323F package, offering enhanced thermal capability. Selection depends on application power dissipation requirements and available PCB space. SOD-323F package is larger than SOD-523 and requires footprint modification.

Q: Are all substitute parts automotive qualified?

A: BZX585-B4V3,115, BZX585-B4V3,135, BZT52H-C4V3,115, BZX84J-C4V3,115, and EDZVFHT2R4.3B carry automotive grade designation with AEC-Q100 or AEC-Q101 qualification. BZT585B4V3T-7 does not specify automotive qualification.

Q: What is the impact of voltage tolerance differences?

A: MAZS0430ML specifies ±3% tolerance. Substitute parts with ±2% tolerance (BZX585-B4V3,115, BZX585-B4V3,135, BZT585B4V3T-7) provide tighter voltage regulation. Parts with ±5% tolerance (BZT52H-C4V3,115, BZX84J-C4V3,115) are acceptable for applications with wider voltage margin requirements.

Q: Can SOD-123F and SOD-323F packages be used interchangeably with SOD-523?

A: No. SOD-123F and SOD-323F have different footprint geometries and require PCB layout modification. SOD-523 parts (BZX585-B4V3,115, BZX585-B4V3,135, BZT585B4V3T-7, EDZVFHT2R4.3B) provide direct replacement without layout changes.

Q: What is the reverse leakage current significance?

A: MAZS0430ML specifies 10 µA @ 1 V reverse leakage. All substitute parts specify 3–5 µA @ 1 V, indicating lower leakage and improved performance. Lower leakage reduces standby current consumption in voltage regulation circuits.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message