MM5Z75V Zener Diode Equivalent & Substitute Parts

Part Overview

The MM5Z75V is a 75 V, 200 mW surface mount zener diode manufactured by onsemi in SOD-523F packaging. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain the 75 V nominal zener voltage while accommodating variations in tolerance, power dissipation, and package configuration to ensure functional compatibility in circuit applications.

Substiute Parts

MM5Z75V

onsemiIn Stock: 15156MM5Z75V Datasheet

Current PartRFQ

BZX584C75_R1_00001

Panjit International Inc.In Stock: 944BZX584C75_R1_00001 Datasheet

SimilarRFQ

BZX585-B75,115

Nexperia USA Inc.In Stock: 1188BZX585-B75,115 Datasheet

SimilarRFQ

BZX585-C75,115

Nexperia USA Inc.In Stock: 8859BZX585-C75,115 Datasheet

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BZX84-A75,215

Nexperia USA Inc.In Stock: 3755BZX84-A75,215 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MM5Z75V is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - Zener (Nom): 75 V (exact match required)
• Mounting Type: Surface Mount
• Operating Temperature Range: Minimum -55°C to 150°C
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

• Power - Max: Equal to or greater than 200 mW
• Impedance (Max): Within ±10% of 255 Ohms
• Current - Reverse Leakage: Acceptable at specified voltage reference
• Package / Case: SOD-523 or SOD-523F variants, or alternative surface mount packages with equivalent footprint compatibility

Tolerance Consideration: Zener voltage tolerance may vary from the original ±6% specification. Substitute parts with tighter tolerances (±1%, ±2%, ±5%) are acceptable for applications where improved voltage regulation is beneficial. Looser tolerances are not acceptable.

Parameter Comparison

Engineering Selection Recommendations

BZX584C75_R1_00001 (Panjit International Inc.)

This part provides direct functional equivalence with identical power rating (200 mW) and operating temperature range (-55°C to 150°C). The ±5% tolerance is tighter than the original ±6%, improving voltage regulation accuracy. Package compatibility is maintained with SOD-523 footprint. Product status is active with ROHS3 compliance. Reverse leakage current is slightly elevated (100 nA @ 56 V versus 50 nA @ 52.5 V), which remains acceptable for most applications. Inventory availability is 860 units.

BZX585-B75,115 (Nexperia USA Inc.)

This part exceeds the original power specification (300 mW versus 200 mW), providing enhanced thermal margin. Zener voltage tolerance is ±2%, delivering superior voltage regulation. Extended operating temperature range (-65°C to 150°C) accommodates wider environmental conditions. Automotive grade qualification with AEC-Q100 certification supports applications requiring automotive-level reliability. SOD-523 package maintains footprint compatibility. Product status is active with ROHS3 compliance. Inventory availability is 1143 units.

BZX585-C75,115 (Nexperia USA Inc.)

This part matches the power specification of BZX585-B75,115 (300 mW) with ±5% tolerance, aligning with the original tolerance specification. Extended operating temperature range (-65°C to 150°C) and automotive grade qualification with AEC-Q100 certification provide enhanced reliability. SOD-523 package maintains footprint compatibility. Product status is active with ROHS3 compliance. Inventory availability is 8767 units, the highest among substitute options.

BZX84-A75,215 (Nexperia USA Inc.)

This part offers the tightest zener voltage tolerance (±1%) with 250 mW power rating. Automotive grade qualification with AEC-Q101 certification supports demanding applications. Extended operating temperature range (-65°C to 150°C) accommodates wider environmental conditions. Package configuration differs from the original (TO-236AB versus SOD-523F), requiring PCB layout modification. Product status is active with ROHS3 compliance. Inventory availability is 3657 units.

Frequently Asked Questions (FAQ)

Q: Can BZX84-A75,215 be used as a direct replacement for MM5Z75V?

A: BZX84-A75,215 is functionally equivalent in electrical performance but requires PCB layout modification due to different package configuration. The original MM5Z75V uses SOD-523F packaging, while BZX84-A75,215 uses TO-236AB (SOT-23-3) packaging. Footprint compatibility must be verified before implementation.

Q: What is the significance of the ±1% tolerance in BZX84-A75,215 compared to the original ±6%?

A: Tighter tolerance specifications provide improved voltage regulation accuracy. A ±1% tolerance ensures the zener voltage remains within a narrower band around 75 V, which is beneficial for precision voltage reference applications. This represents an enhancement over the original specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all four substitute parts listed are ROHS3 compliant. The original MM5Z75V does not specify RoHS status. All substitute parts meet current environmental and hazardous substance restrictions.

Q: Which substitute part has the highest inventory availability?

A: BZX585-C75,115 has the highest inventory availability with 8767 units in stock, followed by BZX84-A75,215 with 3657 units, BZX585-B75,115 with 1143 units, and BZX584C75_R1_00001 with 860 units.

Q: Can I use a substitute part with higher power rating (300 mW) in place of the 200 mW original?

A: Yes, higher power rating is acceptable and provides thermal margin. BZX585-B75,115 and BZX585-C75,115 both offer 300 mW rating, which allows the component to dissipate more power without exceeding junction temperature limits. This is a beneficial substitution for thermal performance.

Q: What is the difference between BZX585-B75,115 and BZX585-C75,115?

A: Both parts share identical electrical specifications (75 V, 300 mW, SOD-523 package, automotive grade, AEC-Q100 qualification) with the primary difference being zener voltage tolerance. BZX585-B75,115 specifies ±2% tolerance, while BZX585-C75,115 specifies ±5% tolerance. Selection depends on voltage regulation precision requirements.

Q: Are automotive qualifications necessary for my application?

A: Automotive qualifications (AEC-Q100 and AEC-Q101) are not required for non-automotive applications. However, these qualifications indicate enhanced reliability testing and quality assurance. If your application does not require automotive-grade components, non-qualified alternatives remain acceptable provided electrical parameters match requirements.

Q: What is the operating temperature range difference between the original and substitutes?

A: The original MM5Z75V operates from -55°C to 150°C. All substitute parts extend the lower temperature limit to -65°C, providing 10°C additional cold temperature capability. This represents an enhancement for applications requiring extended temperature range operation.

Q: Is reverse leakage current a critical parameter for substitution?

A: Reverse leakage current affects circuit performance in high-impedance applications. The original specifies 50 nA @ 52.5 V. BZX584C75_R1_00001 specifies 100 nA @ 56 V, which is slightly elevated but acceptable for most applications. All other substitutes match the original specification at 50 nA @ 52.5 V.