MAZS1500ML Zener Diode 15V 150mW Equivalent & Substitute Parts

Part Overview

The MAZS1500ML is a 15V 150mW Zener diode manufactured by Panasonic Electronic Components in the SSMini2-F1 surface mount package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility while meeting current manufacturing and supply chain standards.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	15	V
Tolerance	±3%	-
Power - Max	150	mW
Impedance (Max)	40	Ohms
Current - Reverse Leakage @ Vr	50 nA @ 11 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 MAZS1500ML is determined by the following critical parameters:

Electrical Compatibility Requirements:

Zener voltage: 15V nominal
Package compatibility: SOD-523 (SC-79)
Surface mount configuration
Moisture sensitivity level: 1 (Unlimited)

Acceptable Variations:

Power dissipation rating may exceed 150mW (higher ratings are backward compatible)
Tolerance may be tighter than ±3% (±2% or ±5% are acceptable)
Impedance values lower than 40 Ohms are acceptable
Operating temperature range extensions are acceptable
Automotive grade and AEC-Q100/AEC-Q101 qualifications enhance reliability

All substitute parts listed maintain the 15V zener voltage specification and SOD-523 package footprint, ensuring direct functional and mechanical compatibility.

Parameter Comparison

Parameter	MAZS1500ML	BZX585-B15,115	BZX585-B15,135	BZX585-C15,115	BZX585-C15,135	BZX84J-B15,115
Manufacturer	Panasonic	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - Zener (Nom)	15 V	15 V	15 V	15 V	15 V	15 V
Tolerance	±3%	±2%	±2%	±5%	±5%	±2%
Power - Max	150 mW	300 mW	300 mW	300 mW	300 mW	550 mW
Impedance (Max)	40 Ohms	15 Ohms	15 Ohms	15 Ohms	15 Ohms	15 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 11 V	50 nA @ 10.5 V	50 nA @ 10.5 V	50 nA @ 10.5 V	50 nA @ 10.5 V	50 nA @ 10.5 V
Voltage - Forward (Vf) (Max) @ If	1 V @ 10 mA	1.1 V @ 100 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
Package / Case	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-90, SOD-323F
Product Status	Obsolete	Active	Active	Active	Active	Active
Grade	-	Automotive	Automotive	Automotive	Automotive	Automotive
Qualification	-	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q101
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (SOD-523 Package):

The BZX585 series from Nexperia USA Inc. provides direct package compatibility with the MAZS1500ML in the SOD-523 form factor. All BZX585 variants maintain the 15V zener voltage specification and are classified as active products with automotive-grade qualification (AEC-Q100). These parts offer improved impedance characteristics (15 Ohms versus 40 Ohms) and higher power dissipation ratings (300mW versus 150mW), providing enhanced performance margins.

BZX585-B15,115 and BZX585-B15,135: ±2% tolerance variants with 300mW power rating
BZX585-C15,115 and BZX585-C15,135: ±5% tolerance variants with 300mW power rating

Alternative Substitute (SOD-323F Package):

The BZX84J-B15,115 from Nexperia USA Inc. provides electrical equivalence with a different surface mount package (SOD-323F). This part features a higher power dissipation rating (550mW), tighter tolerance (±2%), and AEC-Q101 qualification. PCB layout modification is required for this substitution due to package footprint differences.

Compliance Status:

All substitute parts are ROHS3 compliant, REACH unaffected, and carry ECCN EAR99 classification, matching the regulatory profile of the original MAZS1500ML.

Frequently Asked Questions (FAQ)

Q: Can BZX585-B15,115 directly replace MAZS1500ML without PCB modifications?

A: Yes. Both parts use the SOD-523 package (SC-79) with identical footprints. No PCB layout changes are required for direct substitution.

Q: What is the difference between BZX585-B15 and BZX585-C15 variants?

A: The primary difference is tolerance specification. BZX585-B15 variants maintain ±2% tolerance, while BZX585-C15 variants have ±5% tolerance. Both share identical electrical performance in zener voltage, power rating, and impedance.

Q: Why do the substitute parts have higher power ratings (300mW or 550mW) than the original 150mW specification?

A: Higher power ratings provide additional thermal margin and design flexibility. A component rated for higher power dissipation operates within safer thermal limits when used in applications designed for lower power. This does not negatively impact circuit performance.

Q: Is BZX84J-B15,115 a suitable substitute despite the different package?

A: BZX84J-B15,115 is electrically equivalent but uses SOD-323F packaging instead of SOD-523. This requires PCB redesign and is suitable only when layout modifications are feasible. For direct replacement without PCB changes, use BZX585 series parts.

Q: What does AEC-Q100 and AEC-Q101 qualification mean?

A: AEC-Q100 and AEC-Q101 are automotive electronics qualification standards. All substitute parts carry these qualifications, indicating compliance with automotive reliability and environmental stress testing requirements. This enhances component reliability for demanding applications.

Q: Are all substitute parts currently in stock?

A: Inventory status varies by part number. BZX585-C15,135 has 20,756 units, BZX585-C15,115 has 15,300 units, BZX585-B15,115 has 23,775 units, BZX585-B15,135 has 995 units, and BZX84J-B15,115 has 99,170 units available. Verify current availability with your supplier.

Q: Can I use BZX585-C15 (±5% tolerance) in place of MAZS1500ML (±3% tolerance)?

A: Yes. The ±5% tolerance of BZX585-C15 encompasses the ±3% tolerance range of MAZS1500ML. The zener voltage specification remains 15V nominal in both cases, maintaining circuit functionality.

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