M3Z51VC Zener Diode Equivalent & Substitute Parts

Part Overview

The M3Z51VC is a 51 V, 200 mW surface mount zener diode manufactured by Taiwan Semiconductor Corporation in SOD-323F packaging. This component is classified as an active product and is ROHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications in electronic circuits. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when supply chain optimization is required.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	51	V
Power - Maximum	200	mW
Tolerance	±5	%
Impedance (Maximum)	125	Ohms
Current - Reverse Leakage @ Vr	100	nA
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	SC-90, SOD-323F	—

Substitute Part Grouping Explanation

Substitute parts for the M3Z51VC are identified based on electrical and mechanical parameter equivalence. The substitution criteria are:

Zener Voltage (Vz): 51 V nominal with ±5% tolerance
Power Dissipation: 200 mW maximum rating
Impedance: 125 Ohms maximum
Reverse Leakage Current: 100 nA specification
Operating Temperature Range: -55°C to 150°C (TJ)
Mounting Technology: Surface mount configuration
Package Type: SOD-323F or equivalent SC-90 package
Compliance Status: ROHS3 compliant and REACH unaffected

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes. The MMSZ5262BS_R1_00001 from Panjit International Inc. satisfies all substitution criteria.

Parameter Comparison

Parameter	M3Z51VC (Taiwan Semiconductor)	MMSZ5262BS_R1_00001 (Panjit International)	Match Status
Voltage - Zener (Nom)	51 V	51 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	200 mW	200 mW	Equivalent
Impedance (Max)	125 Ohms	125 Ohms	Equivalent
Current - Reverse Leakage @ Vr	100 nA @ 38 V	100 nA @ 39 V	Equivalent
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	SC-90, SOD-323F	SC-90, SOD-323F	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

The MMSZ5262BS_R1_00001 from Panjit International Inc. is a direct parametric equivalent to the M3Z51VC. Both components are active products with identical electrical specifications, operating temperature ranges, and package configurations. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial applications.

Selection between the M3Z51VC and MMSZ5262BS_R1_00001 is based on availability, lead time, and supply chain requirements. The MMSZ5262BS_R1_00001 currently has higher inventory availability (6006 pcs) compared to the M3Z51VC (744 pcs). Both parts are suitable for direct substitution in voltage regulation, overvoltage protection, and reference voltage circuits without circuit redesign or performance degradation.

Frequently Asked Questions (FAQ)

Q: Can the MMSZ5262BS_R1_00001 be used as a direct replacement for the M3Z51VC?

A: Yes. The MMSZ5262BS_R1_00001 is a parametric equivalent with identical zener voltage (51 V), power rating (200 mW), tolerance (±5%), impedance (125 Ohms), reverse leakage current (100 nA), operating temperature range (-55°C to 150°C), and package type (SOD-323F). Direct substitution is supported without circuit modification.

Q: Are there any package differences between these parts?

A: Both parts use the SC-90 / SOD-323F surface mount package. The physical dimensions, pin configuration, and PCB footprint are identical, enabling direct board-level substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the M3Z51VC and MMSZ5262BS_R1_00001 are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for industrial, commercial, and consumer applications.

Q: What is the difference in reverse leakage current specifications?

A: The M3Z51VC specifies 100 nA @ 38 V, while the MMSZ5262BS_R1_00001 specifies 100 nA @ 39 V. Both meet the 100 nA leakage current requirement and are functionally equivalent for circuit applications.

Q: Which part should be selected for new designs?

A: Selection is based on supply chain availability and lead time requirements. Both parts are active products with identical performance characteristics. The MMSZ5262BS_R1_00001 currently has higher inventory availability.

Q: Are there any thermal or operating condition limitations?

A: Both parts operate across the identical temperature range of -55°C to 150°C (TJ). Thermal performance and operating conditions are equivalent between the two components.

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