MM5Z5V6ST1 Equivalent & Substitute Parts

Part Overview

The MM5Z5V6ST1 is a Zener diode rated at 5.6 V nominal with 200 mW maximum power dissipation in a surface mount SOD-523 package. Manufactured by onsemi, this component is classified as obsolete product status. Due to its obsolete designation, equivalent and substitute parts from active product lines are necessary to maintain design continuity and ensure long-term component availability for new production and field replacements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	5.6	V
Tolerance	±2%	—
Power - Max	200	mW
Impedance (Max)	40	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 2 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-79, SOD-523	—

Substitute Part Grouping Explanation

Substitution of the MM5Z5V6ST1 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Zener voltage nominal value within ±2% tolerance band (5.488 V to 5.712 V)
Maximum power dissipation equal to or greater than 200 mW
Impedance (Zzt) at 40 Ohms or lower
Reverse leakage current at 1 µA or lower
Operating temperature range encompassing -65°C to 150°C
Forward voltage characteristics compatible with 900 mV @ 10 mA specification

Mechanical Compatibility Requirements:

Surface mount technology
SOD-523 package footprint (SC-79 designation)

Substitute parts are grouped into two categories:

Direct Equivalents: Parts meeting or exceeding all electrical parameters with identical or superior power ratings and package specifications.

Functional Equivalents: Parts with slightly reduced power ratings (150 mW to 300 mW) or alternative package designations (EMD2, SOD-323F) that maintain electrical performance within the specified tolerance band and operating temperature range.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Ir @ Vr	Vf (Max) @ If	Temp Range	Package	Status
MM5Z5V6ST1	onsemi	5.6 V	±2%	200 mW	40 Ω	1 µA @ 2 V	900 mV @ 10 mA	-65 to 150°C	SOD-523	Obsolete
MM5Z5V6ST1G	onsemi	5.61 V	±2%	500 mW	40 Ω	1 µA @ 2 V	900 mV @ 10 mA	-65 to 150°C	SOD-523	Active
BZX585-B5V6,115	Nexperia USA Inc.	5.6 V	±2%	300 mW	40 Ω	1 µA @ 2 V	1.1 V @ 100 mA	-65 to 150°C	SOD-523	Active
BZX585-B5V6,135	Nexperia USA Inc.	5.6 V	±2%	300 mW	40 Ω	1 µA @ 2 V	1.1 V @ 100 mA	-65 to 150°C	SOD-523	Active
EDZVFHT2R5.6B	Rohm Semiconductor	5.61 V	±2.13%	150 mW	60 Ω	1 µA @ 2.5 V	—	—	EMD2	Active
EDZVT2R5.6B	Rohm Semiconductor	5.6 V	±2%	150 mW	200 Ω	1 µA @ 2.5 V	—	-55 to 150°C	EMD2	Active
PZU5.6B2,115	Nexperia USA Inc.	5.6 V	±2%	310 mW	40 Ω	1 µA @ 2.5 V	1.1 V @ 100 mA	-65 to 150°C	SOD-323F	Active

Engineering Selection Recommendations

Primary Substitute: MM5Z5V6ST1G

The MM5Z5V6ST1G from onsemi is the direct successor to the obsolete MM5Z6V6ST1. This part maintains identical electrical specifications with the exception of increased power rating (500 mW versus 200 mW) and improved zener voltage nominal (5.61 V within the ±2% tolerance band). The MM5Z5V6ST1G carries active product status, ROHS3 compliance, and AEC-Q101 automotive qualification. The SOD-523 package footprint is identical, enabling direct board-level substitution without layout modifications.

Secondary Substitutes: BZX585-B5V6,115 and BZX585-B5V6,135

Both Nexperia BZX585-B5V6 variants maintain the 5.6 V nominal zener voltage and 40 Ohm impedance specification. These parts provide 300 mW power rating, exceeding the original 200 mW requirement. Both variants are AEC-Q100 qualified and ROHS3 compliant with active product status. The primary distinction between these two parts is packaging format: BZX585-B5V6,115 is supplied in Cut Tape (CT) & Digi-Reel format, while BZX585-B5V6,135 is supplied in Tape & Reel (TR) format. Both use identical SOD-523 package geometry.

Functional Alternatives: EDZVFHT2R5.6B and EDZVT2R5.6B

The Rohm Semiconductor EDZV series parts maintain 5.6 V nominal zener voltage with ±2% tolerance. These parts feature reduced power ratings (150 mW) and alternative EMD2 package designation. The EDZVFHT2R5.6B provides AEC-Q101 qualification with maximum operating temperature of 150°C. The EDZVT2R5.6B extends the lower operating temperature limit to -55°C. Both parts are ROHS3 compliant with active product status. Selection of these alternatives is appropriate for applications where power dissipation does not exceed 150 mW and where EMD2 package footprint compatibility exists.

Alternative Package Option: PZU5.6B2,115

The Nexperia PZU5.6B2,115 provides 5.6 V nominal zener voltage in a SOD-323F package with 310 mW power rating. This part is AEC-Q100 qualified and ROHS3 compliant. Selection of this part is appropriate only when SOD-323F package footprint is acceptable and when board layout permits the larger package geometry compared to SOD-523.

Frequently Asked Questions (FAQ)

Q: Can MM5Z5V6ST1G be used as a direct replacement for MM5Z5V6ST1?

A: Yes. The MM5Z5V6ST1G maintains identical zener voltage (5.61 V within ±2% tolerance), impedance (40 Ohms), and operating temperature range (-65°C to 150°C). The SOD-523 package footprint is identical. The increased power rating (500 mW versus 200 mW) provides additional design margin. No circuit modifications are required.

Q: What is the difference between BZX585-B5V6,115 and BZX585-B5V6,135?

A: Both parts are electrically identical with 5.6 V nominal zener voltage, 300 mW power rating, and 40 Ohm impedance. The difference is packaging format: BZX585-B5V6,115 is supplied in Cut Tape (CT) & Digi-Reel format for automated pick-and-place assembly, while BZX585-B5V6,135 is supplied in Tape & Reel (TR) format. Selection depends on assembly equipment compatibility and procurement requirements.

Q: Are the Rohm EDZV series parts suitable replacements?

A: The EDZVFHT2R5.6B and EDZVT2R5.6B maintain 5.6 V nominal zener voltage within tolerance specifications. However, these parts feature reduced power ratings (150 mW) and use EMD2 package designation instead of SOD-523. Selection is appropriate only when application power dissipation does not exceed 150 mW and when EMD2 package footprint is compatible with board layout.

Q: What is the significance of AEC-Q101 and AEC-Q100 qualifications?

A: AEC-Q101 and AEC-Q100 are automotive qualification standards. MM5Z5V6ST1G carries AEC-Q101 qualification. BZX585-B5V6 variants and PZU5.6B2,115 carry AEC-Q100 qualification. Both qualifications indicate suitability for automotive applications. Selection between these qualifications depends on specific application requirements and customer specifications.

Q: Can PZU5.6B2,115 be used as a substitute?

A: The PZU5.6B2,115 maintains 5.6 V nominal zener voltage and provides 310 mW power rating. However, this part uses SOD-323F package instead of SOD-523. Direct board-level substitution is not possible without layout modifications. Selection of this part is appropriate only when SOD-323F package footprint is acceptable and when board redesign is feasible.

Q: What are the RoHS compliance differences?

A: The original MM5Z5V6ST1 is RoHS non-compliant. All substitute parts (MM5Z5V6ST1G, BZX585-B5V6 variants, EDZV series, and PZU5.6B2,115) are ROHS3 compliant. For applications requiring RoHS compliance, any of the substitute parts satisfy regulatory requirements.

Q: How do impedance differences affect substitution?

A: The original MM5Z5V6ST1 specifies 40 Ohm maximum impedance. MM5Z5V6ST1G, BZX585-B5V6 variants, and PZU5.6B2,115 maintain 40 Ohm impedance. EDZVFHT2R5.6B specifies 60 Ohm impedance, and EDZVT2R5.6B specifies 200 Ohm impedance. Higher impedance values may affect circuit performance in applications sensitive to dynamic impedance characteristics. Verification of circuit performance is necessary when selecting parts with impedance values exceeding the original specification.

Q: What inventory considerations apply to these substitutes?

A: MM5Z5V6ST1G has 20,200 pieces in stock. BZX585-B5V6,115 has 70,839 pieces in stock. BZX585-B5V6,135 has 20,838 pieces in stock. EDZVFHT2R5.6B has 37,100 pieces in stock. EDZVT2R5.6B has 88,598 pieces in stock. PZU5.6B2,115 has 18,100 pieces in stock. All substitute parts maintain active product status with substantial inventory availability.

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