Equivalent & Substitute Parts for MM5Z10VT1

Part Overview

The MM5Z10VT1 is a Zener diode rated at 10 V nominal with 100 mW maximum power dissipation in a surface mount SOD-523 package, manufactured by onsemi. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. The MM5Z10VT1 operates across a temperature range of -65°C to 150°C with ±6% voltage tolerance and is RoHS non-compliant. Substitute parts must maintain the 10 V Zener voltage specification while accommodating variations in power rating, tolerance, and package configuration based on application requirements.

Key Parameters

Parameter	MM5Z10VT1 Specification
Voltage - Zener (Nom)	10 V
Power - Max	100 mW
Tolerance	±6%
Impedance (Max)	20 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 8 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	SC-79, SOD-523
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MM5Z10VT1 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): Must equal 10 V
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must encompass -65°C to 150°C minimum
Package Compatibility: SOD-523 package preferred for direct mechanical substitution; alternative packages (SOD-123F, SOD-323F, 0603) acceptable with PCB layout modification

Secondary Substitution Criteria:

Power - Max: Substitute parts rated at 100 mW or higher are functionally compatible
Tolerance: Tighter tolerance (lower percentage) provides improved voltage regulation
Impedance (Max): Lower impedance values indicate superior high-frequency performance
Current - Reverse Leakage: Lower leakage current indicates improved reverse bias characteristics
RoHS Compliance: Active product status with RoHS3 compliance preferred for new designs

Substitute parts are grouped into three categories based on package type: SOD-523 direct replacements, alternative surface mount packages (SOD-123F, SOD-323F), and chip resistor form factor (0603).

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Power (Max)	Tolerance	Zzt (Max)	Package	Status	RoHS
MM5Z10VT1	onsemi	10 V	100 mW	±6%	20 Ohms	SOD-523	Obsolete	Non-compliant
MM5Z10VT1G	onsemi	10 V	500 mW	±5.5%	20 Ohms	SOD-523	Active	ROHS3 Compliant
BZT52H-C10,115	Nexperia USA Inc.	10 V	375 mW	±5%	10 Ohms	SOD-123F	Active	ROHS3 Compliant
BZT585B10T-7	Diodes Incorporated	10 V	350 mW	±2%	10 Ohms	SOD-523	Active	ROHS3 Compliant
BZX585-B10,115	Nexperia USA Inc.	10 V	300 mW	±2%	10 Ohms	SOD-523	Active	ROHS3 Compliant
BZX585-B10,135	Nexperia USA Inc.	10 V	300 mW	±2%	10 Ohms	SOD-523	Active	ROHS3 Compliant
BZX585-C10,115	Nexperia USA Inc.	10 V	300 mW	±5%	10 Ohms	SOD-523	Active	ROHS3 Compliant
BZX585-C10,135	Nexperia USA Inc.	10 V	300 mW	±5%	10 Ohms	SOD-523	Active	ROHS3 Compliant
BZX84J-B10,115	Nexperia USA Inc.	10 V	550 mW	±2%	10 Ohms	SOD-323F	Active	ROHS3 Compliant
BZX84J-C10,115	Nexperia USA Inc.	10 V	550 mW	±5%	10 Ohms	SOD-323F	Active	ROHS3 Compliant
CZRU52C10	Comchip Technology	10 V	150 mW	±5%	15 Ohms	0603/SOD-523F	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Package Replacement (SOD-523):

MM5Z10VT1G is the primary direct replacement, offering identical SOD-523 packaging with superior specifications: 500 mW power rating (5× the original), ±5.5% tolerance (improved from ±6%), and active product status with ROHS3 compliance. This part is recommended for applications requiring direct PCB compatibility without layout modification.

BZT585B10T-7 provides SOD-523 compatibility with enhanced performance characteristics: 350 mW power rating, ±2% tolerance, and 10 Ohms impedance. This part is suitable for applications requiring tighter voltage regulation and improved reverse bias characteristics.

BZX585-B10,115, BZX585-B10,135, BZX585-C10,115, and BZX585-C10,135 are all SOD-523 packaged alternatives with 300 mW power ratings and 10 Ohms impedance. The B-series variants offer ±2% tolerance with AEC-Q100 automotive qualification. The C-series variants provide ±5% tolerance matching the original specification tolerance range. All four parts are active with ROHS3 compliance.

Alternative Package Options:

BZT52H-C10,115 is a SOD-123F packaged alternative with 375 mW power rating and ±5% tolerance. This part includes AEC-Q101 automotive qualification and is suitable for applications where package size reduction is acceptable.

BZX84J-B10,115 and BZX84J-C10,115 are SOD-323F packaged alternatives with 550 mW power ratings. Both parts include AEC-Q101 automotive qualification. BZX84J-B10,115 offers ±2% tolerance while BZX84J-C10,115 provides ±5% tolerance. These parts are suitable for applications requiring higher power dissipation capability.

CZRU52C10 is a 0603 chip resistor form factor alternative with 150 mW power rating and ±5% tolerance. This part is suitable for space-constrained applications and offers the smallest footprint among available substitutes.

Compliance Considerations:

All recommended substitute parts are ROHS3 compliant and active products, addressing the obsolescence status of the MM5Z10VT1. Parts with AEC-Q100 or AEC-Q101 automotive qualification are suitable for automotive and industrial applications requiring enhanced reliability standards.

Frequently Asked Questions (FAQ)

Q: Can MM5Z10VT1G be used as a direct replacement for MM5Z10VT1?

A: Yes. MM5Z10VT1G maintains identical 10 V Zener voltage specification, SOD-523 package configuration, and -65°C to 150°C operating temperature range. The substitute offers superior specifications with 500 mW power rating, ±5.5% tolerance, and active product status with ROHS3 compliance. No PCB layout modification is required.

Q: What is the difference between BZX585-B10 and BZX585-C10 series parts?

A: Both series maintain identical 10 V Zener voltage, 300 mW power rating, 10 Ohms impedance, and SOD-523 packaging. The primary difference is voltage tolerance: BZX585-B10 series provides ±2% tolerance while BZX585-C10 series provides ±5% tolerance. Selection depends on voltage regulation precision requirements.

Q: Are automotive-qualified parts (AEC-Q100, AEC-Q101) required for all applications?

A: Automotive qualification is not required for all applications. AEC-Q100 and AEC-Q101 qualified parts are specified for automotive and industrial applications requiring enhanced reliability and qualification testing. Standard commercial applications may use non-qualified alternatives.

Q: Can SOD-123F or SOD-323F packaged parts replace SOD-523 packaged parts?

A: SOD-123F and SOD-323F packaged parts are functionally equivalent but require PCB layout modification due to different package footprints. These alternatives are suitable when package size reduction is acceptable or when SOD-523 inventory is unavailable. Verify PCB design compatibility before implementation.

Q: What is the significance of impedance (Zzt) values in Zener diode selection?

A: Impedance (Zzt) represents dynamic impedance at specified test conditions. Lower impedance values indicate superior voltage regulation and reduced output impedance variation across load current changes. Substitute parts with 10 Ohms impedance provide improved performance compared to the original 20 Ohms specification.

Q: Is CZRU52C10 suitable for high-frequency applications?

A: CZRU52C10 is a 0603 chip resistor form factor Zener diode with 150 mW power rating. While functionally equivalent at 10 V Zener voltage, the 0603 package and 15 Ohms impedance may introduce different parasitic characteristics compared to SOD-523 packages. Application-specific high-frequency performance evaluation is required.

Q: What inventory considerations apply to substitute part selection?

A: MM5Z10VT1G offers the highest inventory availability (29,100 pcs) among direct SOD-523 replacements. BZX585-B10,135 provides substantial inventory (35,680 pcs) with automotive qualification. CZRU52C10 offers the largest inventory (77,899 pcs) among all alternatives. Inventory levels support long-term procurement planning and supply chain continuity.

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