MAZ40750MF Equivalent & Substitute Parts

Part Overview

The MAZ40750MF is a Zener diode manufactured by Panasonic Electronic Components, rated at 7.5 V nominal with 370 mW maximum power dissipation in a DO-34 axial through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Zener diodes in this voltage and power class are used for voltage regulation, overvoltage protection, and reference applications in electronic circuits. The 7.5 V rating and 370 mW power specification define the functional requirements for direct substitution.

Key Parameters

Parameter	MAZ40750MF Value	Unit
Voltage - Zener (Nom)	7.5	V
Tolerance	±6%	%
Power - Max	370	mW
Impedance (Max)	15	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 5 V
Voltage - Forward (Max) @ If	900	mV @ 10 mA
Mounting Type	Through Hole	-
Package / Case	DO-34, Axial	-
Product Status	Obsolete	-

Substitute Part Grouping Explanation

Substitution of the MAZ40750MF is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 7.5 V nominal (determines circuit regulation point)
Power rating: Equal to or greater than 370 mW (ensures thermal capability)
Mounting type: Through hole axial configuration (mechanical compatibility)
Tolerance: ±6% or tighter (voltage accuracy requirement)

Secondary Compatibility Factors:

Impedance characteristics (affects circuit response)
Reverse leakage current (influences standby performance)
Forward voltage drop (affects power dissipation in conducting state)
Package form factor (physical board layout fit)

Substitute parts are grouped by power rating capability, as this parameter directly impacts application suitability. Parts with equal or higher power ratings maintain functional equivalence while providing design margin. Package variations (DO-34, DO-35, DO-41) represent different physical form factors but maintain electrical compatibility when voltage and power specifications align.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance (%)	Power (mW)	Zzt (Ohms)	Ir @ Vr (µA)	Vf (Max) @ If	Package	Status
MAZ40750MF	Panasonic	7.5	±6%	370	15	1 @ 5V	900 mV @ 10 mA	DO-34	Obsolete
1N4100-1	Microchip Technology	7.5	±5%	500	200	1 @ 5.7V	1.1 V @ 200 mA	DO-35	Active
1N4462	Microchip Technology	7.5	±5%	1500	2.5	1 @ 4.5V	1.5 V @ 1 A	DO-41	Active
1N4693	Microchip Technology	7.5	±5%	500	-	10 @ 5.7V	1.1 V @ 200 mA	DO-35	Active
1N4955	Microchip Technology	7.5	±5%	5000	1.5	100 @ 5.7V	1.5 V @ 1 A	Axial E	Active
1N5236B-TAP	Vishay	7.5	±5%	500	6	3 @ 6V	1.1 V @ 200 mA	DO-35	Active
1N5236B-TR	Vishay	7.5	±5%	500	6	3 @ 6V	1.1 V @ 200 mA	DO-35	Active
1N5236BDO35	Microsemi Corporation	7.5	±5%	500	6	3 @ 6V	1.5 V @ 200 mA	DO-35	Active
1N5236BTR	Fairchild Semiconductor	7.5	±5%	500	6	3 @ 6V	1.2 V @ 200 mA	DO-35	Active
1N5236C-TAP	Vishay	7.5	±2%	500	6	3 @ 6V	1.1 V @ 200 mA	DO-35	Active

Engineering Selection Recommendations

Direct Substitutes (Minimum Specification Match):

The 1N5236 series parts (1N5236B-TAP, 1N5236B-TR, 1N5236BDO35, 1N5236BTR) provide the closest functional equivalence to the MAZ40750MF. These parts maintain 7.5 V nominal voltage with ±5% tolerance, 500 mW power rating (exceeding the 370 mW requirement), and through-hole axial mounting. The 1N5236 series is widely available in active production status across multiple manufacturers (Vishay, Microsemi, Fairchild), ensuring long-term supply continuity.

The 1N5236C-TAP variant offers tighter ±2% tolerance for applications requiring enhanced voltage accuracy. This part carries AEC-Q101 automotive qualification and ROHS3 compliance, suitable for regulated industries.

Higher Power Alternatives:

The 1N4462 (1.5 W) and 1N4955 (5 W) provide substantially higher power dissipation capability for designs requiring thermal margin or higher current handling. These parts maintain 7.5 V regulation with improved impedance characteristics (2.5 Ohms and 1.5 Ohms respectively). Selection of these higher-power variants is appropriate when circuit analysis confirms adequate power budget or when design margins are prioritized.

Compliance Considerations:

All recommended substitute parts carry ROHS3 compliance or ROHS non-compliant status with REACH unaffected designation. The 1N5236 series specifically qualifies as ROHS3 compliant, meeting modern environmental and regulatory requirements. Parts from Vishay (1N5236B-TAP, 1N5236C-TAP) carry AEC-Q101 automotive qualification, appropriate for automotive and high-reliability applications.

Product Status:

All substitute parts listed maintain active production status, ensuring availability and supply chain stability. The MAZ40750MF obsolete status necessitates transition to active alternatives for new designs and ongoing procurement.

Frequently Asked Questions (FAQ)

Q: Can the 1N5236B series directly replace the MAZ40750MF in existing designs?

A: Yes. The 1N5236B series maintains identical 7.5 V nominal voltage and exceeds the 370 mW power requirement with 500 mW rating. Through-hole axial mounting is compatible. The primary difference is package form factor (DO-35 versus DO-34), which may require PCB layout verification for physical fit. Electrical performance is equivalent.

Q: What is the difference between 1N5236B-TAP and 1N5236B-TR packaging?

A: Both parts are electrically identical 7.5 V 500 mW Zener diodes from Vishay. The designation indicates tape packaging format (TAP = Cut Tape, TR = Tape Reel). Selection depends on procurement quantity and assembly process requirements. Electrical specifications are identical.

Q: Why would I select the 1N4955 (5 W) over the 1N5236B (500 mW)?

A: The 1N4955 provides five times greater power dissipation capability and significantly lower impedance (1.5 Ohms versus 6 Ohms). Selection is appropriate for circuits with higher current requirements, applications requiring faster transient response, or designs where thermal margin is critical. The MAZ40750MF 370 mW specification does not require this upgrade for direct substitution.

Q: Is the ±2% tolerance of 1N5236C-TAP necessary compared to ±5% alternatives?

A: Tolerance selection depends on circuit requirements. The ±2% specification of 1N5236C-TAP provides tighter voltage regulation accuracy. The MAZ40750MF specifies ±6% tolerance, so ±5% alternatives (1N5236B series) meet or exceed the original specification. Tighter tolerance is beneficial for precision voltage reference applications but not required for general substitution.

Q: Are there package compatibility issues between DO-34 and DO-35 form factors?

A: Both DO-34 and DO-35 are axial through-hole packages with similar lead spacing. Physical board layout verification is required to confirm PCB hole alignment and component clearance. Electrical performance is independent of package form factor when voltage and power specifications match.

Q: What is the significance of AEC-Q101 qualification on the 1N5236 series?

A: AEC-Q101 qualification indicates the part meets automotive industry reliability and quality standards. This certification is relevant for automotive applications, industrial equipment, and high-reliability systems. For general-purpose applications, AEC-Q101 qualification is not required but provides additional assurance of manufacturing consistency.

Q: Can I use the 1N4100-1 as a substitute for the MAZ40750MF?

A: The 1N4100-1 maintains 7.5 V voltage and 500 mW power rating, meeting basic electrical requirements. However, impedance specification (200 Ohms) is significantly higher than the MAZ40750MF (15 Ohms), which affects circuit response characteristics. This part is suitable for applications where impedance is not a critical parameter but may not be appropriate for precision regulation circuits.

Q: What compliance certifications should I verify for my specific application?

A: Verify ROHS compliance status (ROHS3 compliant parts are preferred for new designs), REACH status, and any industry-specific certifications (AEC-Q101 for automotive, for example). All listed substitute parts carry ECCN EAR99 and HTSUS 8541.10.0050 classifications. Confirm MSL (Moisture Sensitivity Level) requirements for your assembly process.

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