MAZ40560MF Equivalent & Substitute Parts

Part Overview

The MAZ40560MF is a Panasonic Electronic Components zener diode rated at 5.6 V nominal with 370 mW maximum power dissipation in a DO-34 axial through-hole package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. Substitute parts must maintain the 5.6 V zener voltage specification while accommodating variations in power rating, tolerance, and package configuration based on application requirements.

Key Parameters

Parameter	MAZ40560MF Value
Voltage - Zener (Nom) (Vz)	5.6 V
Tolerance	±6%
Power - Max	370 mW
Impedance (Max) (Zzt)	40 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 2 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Mounting Type	Through Hole
Package / Case	DO-204AG, DO-34, Axial
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MAZ40560MF is determined by the following critical parameters: nominal zener voltage of 5.6 V, through-hole axial mounting configuration, and power dissipation capability. Substitute parts are grouped into two categories based on functional equivalence:

Direct Equivalents (Identical Electrical Performance): Parts maintaining 5.6 V nominal voltage, similar power ratings (370–400 mW range), and comparable impedance characteristics. These parts are suitable for direct replacement in applications where the original specifications are required.

Functional Equivalents (Higher Power Capability): Parts with 5.6 V nominal voltage but increased power ratings (500 mW to 1.19 W) and different package configurations. These parts provide enhanced thermal performance and are suitable for applications requiring higher power dissipation or improved reliability margins.

The following parameters determine substitution eligibility:

Voltage - Zener (Nom): Must equal 5.6 V
Mounting Type: Must be Through Hole
Package / Case: Axial configuration (DO-34, DO-35, DO-41 variants acceptable)
Power - Max: Must meet or exceed application requirements

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power - Max	Zzt (Max)	Vf (Max) @ If	Package / Case	Product Status
MAZ40560MF	Panasonic Electronic Components	5.6 V	±6%	370 mW	40 Ohms	900 mV @ 10 mA	DO-204AG, DO-34	Obsolete
BZX79-B5V6,133	NXP Semiconductors	5.6 V	±2%	400 mW	40 Ohms	900 mV @ 10 mA	DO-204AH, DO-35	Active
BZX79-B5V6,143	NXP USA Inc.	5.6 V	±2%	400 mW	40 Ohms	900 mV @ 10 mA	DO-204AH, DO-35	Active
1N4734A	Microsemi Corporation	5.6 V	±5%	1 W	5 Ohms	Not specified	DO-204AL, DO-41	Active
1N4734AGE3	Microchip Technology	5.6 V	±5%	1 W	5 Ohms	1.2 V @ 200 mA	DO-204AL, DO-41	Active
1N5232B	Microchip Technology	5.6 V	±5%	500 mW	11 Ohms	1.5 V @ 200 mA	DO-204AH, DO-35	Active
1N5232BTR	Fairchild Semiconductor	5.6 V	±5%	500 mW	11 Ohms	1.2 V @ 200 mA	DO-204AH, DO-35	Active
1N5524B	Microchip Technology	5.6 V	±5%	500 mW	30 Ohms	1.1 V @ 200 mA	DO-204AH, DO-35	Active
1N5730C	Microchip Technology	5.6 V	±1%	500 mW	25 Ohms	900 mV @ 10 mA	DO-204AH, DO-35	Active
1N5919A	Microchip Technology	5.6 V	±10%	1.19 W	2 Ohms	1.2 V @ 200 mA	DO-204AL, DO-41	Active

Engineering Selection Recommendations

Direct Replacement (Preferred for Pin-Compatible Applications):

The BZX79-B5V6,133 and BZX79-B5V6,143 from NXP Semiconductors are the closest functional equivalents to the MAZ40560MF. Both parts maintain 5.6 V nominal voltage, 40 Ohms maximum impedance, and 900 mV forward voltage at 10 mA. The 400 mW power rating exceeds the original 370 mW specification, providing improved thermal margin. Both parts are active products with unlimited moisture sensitivity level (MSL 1) and are suitable for direct substitution in applications where the DO-35 package is acceptable as a mechanical equivalent to DO-34.

Higher Power Alternatives (For Enhanced Reliability):

The 1N5232B, 1N5232BTR, and 1N5524B provide 500 mW power dissipation in DO-35 packages, offering increased thermal headroom over the original specification. The 1N5730C offers the tightest tolerance (±1%) among 500 mW options. These parts are recommended for applications requiring improved reliability margins or thermal performance.

The 1N4734A, 1N4734AGE3, and 1N5919A provide 1 W and 1.19 W power ratings in DO-41 packages, suitable for high-power applications. The 1N4734A and 1N4734AGE3 are active products with established supply availability.

Compliance Considerations:

All substitute parts listed are active products with established supply chains. The BZX79-B5V6 series from NXP carries REACH Unaffected status. Microchip Technology parts (1N4734AGE3, 1N5232B, 1N5524B, 1N5730C, 1N5919A) are active and widely available. RoHS compliance status varies; applications requiring RoHS compliance should verify specific part certifications.

Frequently Asked Questions (FAQ)

Q: Can the BZX79-B5V6,143 directly replace the MAZ40560MF in existing PCB designs?

A: The BZX79-B5V6,143 maintains identical electrical specifications (5.6 V, 40 Ohms impedance, 900 mV forward voltage) and is a through-hole axial component. The DO-35 package is mechanically compatible with DO-34 footprints in most applications. Verify PCB pad spacing and lead diameter compatibility before implementation.

Q: What is the difference between the 370 mW MAZ40560MF and the 400 mW BZX79-B5V6 series?

A: The 400 mW rating provides 8% additional power dissipation capacity. This increased margin improves thermal performance and reliability in applications operating near the original component's power limit. The electrical characteristics (voltage, impedance, forward voltage) remain equivalent.

Q: Are the 500 mW alternatives (1N5232B, 1N5524B, 1N5730C) suitable for direct replacement?

A: Yes, for applications where the original 370 mW specification is not a hard constraint. The 500 mW rating provides significant thermal margin and improved reliability. These parts maintain 5.6 V nominal voltage and through-hole axial mounting. Verify that the application circuit can accommodate the different impedance values (11–30 Ohms versus 40 Ohms original).

Q: What is the significance of tolerance differences (±6% original versus ±2% NXP, ±1% 1N5730C)?

A: Tighter tolerance (lower percentage) indicates more precise voltage regulation. The ±2% NXP parts and ±1% 1N5730C provide better voltage stability compared to the ±6% original. Applications requiring precise voltage regulation benefit from tighter tolerance parts. Applications with wider voltage tolerance requirements can use any listed substitute.

Q: Can I use the 1 W rated parts (1N4734A, 1N5919A) as direct replacements?

A: Yes, electrically. These parts maintain 5.6 V nominal voltage and through-hole axial mounting. However, they use DO-41 packages instead of DO-34/DO-35, requiring PCB footprint modification. The significantly higher power rating (1 W versus 370 mW) provides substantial thermal margin for high-power applications.

Q: What is the difference between 1N5232B and 1N5232BTR?

A: Both parts are 5.6 V, 500 mW zener diodes in DO-35 packages with identical electrical specifications. The primary difference is manufacturer: 1N5232B is Microchip Technology and 1N5232BTR is Fairchild Semiconductor. Both are active products with equivalent performance characteristics.

Q: How do I select between multiple 500 mW alternatives?

A: Selection depends on impedance requirements and tolerance specifications. The 1N5730C offers the tightest tolerance (±1%) and lowest impedance variation (25 Ohms). The 1N5524B provides 30 Ohms impedance, closest to the original 40 Ohms. The 1N5232B and 1N5232BTR offer 11 Ohms impedance for applications requiring lower dynamic impedance. Verify impedance compatibility with circuit design requirements.

Q: Are all listed substitutes available in production quantities?

A: Yes. All substitute parts listed are active products with documented inventory availability. The BZX79-B5V6,143 has 40,912 pieces in stock. The 1N4734A has 285,200 pieces available. Verify current availability with component suppliers for specific procurement timelines.

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