MAZS0680ML Zener Diode 6.8V 150mW Equivalent & Substitute Parts

Part Overview

The MAZS0680ML is a Panasonic surface mount zener diode rated at 6.8 V nominal with 150 mW maximum power dissipation in an SSMini2-F1 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 designs.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	6.8	V
Tolerance	±3%	-
Power - Max	150	mW
Impedance (Max)	20	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 4 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 MAZS0680ML is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 6.8 V nominal (tolerance variations acceptable within application requirements)
Mounting type: Surface mount
Moisture sensitivity: MSL 1 or equivalent

Secondary Compatibility Factors:

Power dissipation rating: Substitute parts rated at 150 mW or higher are compatible
Package compatibility: SOD-523, SOD-323F, and SOD-123F packages are mechanically compatible with surface mount assembly processes
Impedance and leakage characteristics: Variations within the provided specifications do not prevent functional substitution

The substitute parts listed below meet the primary matching criteria and are available in active product status, providing design continuity for the obsolete MAZS0680ML.

Parameter Comparison

Parameter	MAZS0680ML	BZT52H-C6V8,115	BZX585-B6V8,115	BZX585-B6V8,135	BZX84J-B6V8,115	BZX84J-C6V8,115	EDZVFHT2R6.8B
Manufacturer	Panasonic	NXP Semiconductors	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Rohm Semiconductor
Voltage - Zener (Nom)	6.8 V	6.8 V	6.8 V	6.8 V	6.8 V	6.8 V	6.79 V
Tolerance	±3%	±5%	±2%	±2%	±2%	±5%	±2.06%
Power - Max	150 mW	375 mW	300 mW	300 mW	550 mW	550 mW	150 mW
Impedance (Max)	20 Ohms	8 Ohms	15 Ohms	15 Ohms	15 Ohms	15 Ohms	40 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 4 V	2 µA @ 4 V	2 µA @ 4 V	2 µA @ 4 V	2 µA @ 4 V	2 µA @ 4 V	500 nA @ 3.5 V
Voltage - Forward (Vf) (Max) @ If	1 V @ 10 mA	900 mV @ 10 mA	1.1 V @ 100 mA	1.1 V @ 100 mA	1.1 V @ 100 mA	1.1 V @ 100 mA	-
Operating Temperature	-	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	150°C (TJ)
Package / Case	SC-79, SOD-523	SOD-123F	SC-79, SOD-523	SC-79, SOD-523	SC-90, SOD-323F	SC-90, SOD-323F	SC-79, SOD-523
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Package-Compatible Substitutes (SOD-523 Package):

The EDZVFHT2R6.8B and both BZX585-B6V8 variants (115 and 135) maintain the original SOD-523 package footprint, enabling direct board-level substitution without PCB redesign. The EDZVFHT2R6.8B from Rohm Semiconductor matches the 150 mW power rating of the original MAZS0680ML and carries AEC-Q101 automotive qualification. The BZX585-B6V8 series offers increased power dissipation (300 mW) with tighter voltage tolerance (±2%) and AEC-Q100 automotive qualification, providing enhanced performance margins.

Higher Power Rating Alternatives (SOD-323F Package):

The BZX84J-B6V8,115 and BZX84J-C6V8,115 devices provide 550 mW power dissipation in the SOD-323F package, requiring PCB layout modification but offering significant thermal headroom. Both variants carry AEC-Q101 automotive qualification. The BZX84J-B6V8,115 maintains ±2% tolerance, while the BZX84J-C6V8,115 operates at ±5% tolerance.

Increased Power Density Option (SOD-123F Package):

The BZT52H-C6V8,115 from NXP Semiconductors delivers 375 mW in the SOD-123F package with AEC-Q101 automotive qualification. This option requires PCB footprint modification and operates at ±5% voltage tolerance.

All substitute parts are in active product status with unlimited moisture sensitivity rating (MSL 1), ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the EDZVFHT2R6.8B directly replace the MAZS0680ML without PCB modification?

A: Yes. The EDZVFHT2R6.8B maintains the SC-79/SOD-523 package footprint, enabling direct substitution. Both devices share identical package dimensions and pin configurations.

Q: What is the primary difference between the BZX585-B6V8,115 and BZX585-B6V8,135 variants?

A: Both variants are electrically identical with 6.8 V nominal voltage, 300 mW power rating, and ±2% tolerance. The numerical suffix indicates packaging configuration (115 and 135 refer to tape and reel specifications). Selection depends on procurement and assembly requirements.

Q: Why do some substitute parts have higher power ratings than the original MAZS0680ML?

A: Higher power-rated devices (BZX84J series at 550 mW, BZX585 series at 300 mW) provide thermal margin and design flexibility. These parts are functionally compatible and can be used in applications where the original 150 mW rating is adequate, with the benefit of reduced junction temperature during operation.

Q: Are all substitute parts automotive qualified?

A: Yes. All listed substitute parts carry either AEC-Q100 or AEC-Q101 automotive qualification, meeting automotive industry reliability standards.

Q: What package changes are required when substituting with BZX84J series devices?

A: The BZX84J series uses the SOD-323F package (SC-90) instead of the original SOD-523 package (SC-79). PCB footprint modification is required, including trace routing and solder pad repositioning to accommodate the different package dimensions.

Q: How do voltage tolerance variations affect circuit performance?

A: The MAZS0680ML operates at ±3% tolerance, while most substitutes offer ±2% or ±5%. Tighter tolerance (±2%) provides more precise voltage regulation. Wider tolerance (±5%) may require circuit margin verification in applications with strict voltage specifications.

Q: Is the EDZVFHT2R6.8B suitable for high-temperature applications?

A: The EDZVFHT2R6.8B is rated to 150°C junction temperature (TJ) and carries AEC-Q101 qualification, making it suitable for automotive and industrial high-temperature environments.

Q: Can substitute parts with different impedance values affect circuit behavior?

A: Impedance variations (ranging from 8 to 40 Ohms across the substitute options) influence transient response and noise filtering characteristics. Applications requiring specific impedance performance should verify compatibility with the selected substitute part's impedance specification.

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