ZMM5260B-7 Equivalent & Substitute Parts

Part Overview

The ZMM5260B-7 is a Zener diode rated at 43 V nominal voltage with 500 mW power dissipation, manufactured by Diodes Incorporated in a Surface Mount Mini MELF package (DO-213AC). This component is classified as Obsolete, indicating discontinuation from the original manufacturer. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this zener diode specification.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	43	V
Tolerance	±5%	-
Power - Max	500	mW
Impedance (Max)	93	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 33 V	-
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 200 mA
Operating Temperature Range	-65°C to 175°C	-
Mounting Type	Surface Mount	-
Package / Case	DO-213AC, MINI-MELF, SOD-80	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the ZMM5260B-7 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 43 V (exact match required)
Tolerance: ±5% (acceptable tolerance band)
Power - Max: 500 mW (exact match required)
Impedance (Max): 93 Ohms (maximum allowable value)
Current - Reverse Leakage @ Vr: 100 nA @ 33 V (maximum allowable value)
Operating Temperature Range: -65°C to 175°C (minimum required coverage)
Mounting Type: Surface Mount (functional requirement)
Package / Case: DO-213AC, MINI-MELF, or SOD-80 (mechanical compatibility)

Substitute parts are grouped into the following categories:

Direct Equivalents (Identical Electrical and Mechanical Specifications): Parts meeting all primary criteria with matching package designations and electrical performance.

Parametric Equivalents (Matching Electrical Specifications with Package Variations): Parts with identical electrical parameters but alternative surface mount package configurations within the MELF/SOD-80 family.

Manufacturer Recommended Alternatives (Active Production Status): Parts from active manufacturers meeting core electrical specifications, selected to ensure supply chain continuity despite potential minor package or tolerance variations.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Vf @ 200mA (V)	Package	Product Status	RoHS Status
ZMM5260B-7	Diodes Incorporated	43	±5%	500	93	1.5	DO-213AC, MINI-MELF, SOD-80	Obsolete	ROHS3 Compliant
CDLL5260B	Microchip Technology	43	±5%	-	93	1.1	DO-213AB, MELF	Active	RoHS non-compliant
TZMC43-M-18	Vishay General Semiconductor - Diodes Division	43	±5%	500	90	1.5	DO-213AC, MINI-MELF, SOD-80	Active	ROHS3 Compliant
1N5260BUR-1	Microchip Technology	43	±5%	500	93	1.1	DO-213AA	Active	RoHS non-compliant
CDLL5260	Microchip Technology	43	±20%	-	93	1.1	DO-213AB, MELF	Active	RoHS non-compliant
CDLL5260A	Microchip Technology	43	±10%	-	93	1.1	DO-213AB, MELF	Active	RoHS non-compliant
CZRL5260B-G	Comchip Technology	43	±5%	500	93	1.25	DO-213AC, MINI-MELF, SOD-80	Obsolete	ROHS3 Compliant
TZM5260B-GS08	Vishay General Semiconductor - Diodes Division	43	±5%	500	93	1.1	DO-213AC, MINI-MELF, SOD-80	Active	ROHS3 Compliant
TZM5260B-GS18	Vishay General Semiconductor - Diodes Division	43	±5%	500	93	1.1	DO-213AC, MINI-MELF, SOD-80	Active	ROHS3 Compliant

Engineering Selection Recommendations

Highest Compatibility - Active Production:

The TZMC43-M-18 (Vishay General Semiconductor - Diodes Division) and TZM5260B-GS08 / TZM5260B-GS18 (Vishay General Semiconductor - Diodes Division) provide the closest electrical and mechanical equivalence to the ZMM5260B-7. These parts maintain identical zener voltage (43 V), tolerance (±5%), power rating (500 mW), impedance specification (90-93 Ohms), and package configuration (DO-213AC, MINI-MELF, SOD-80). All three are in Active production status and ROHS3 compliant, ensuring long-term supply availability and regulatory compliance.

Alternative with Active Status:

The 1N5260BUR-1 (Microchip Technology) meets all core electrical specifications (43 V, ±5%, 500 mW, 93 Ohms impedance) and is in Active production. However, this part uses the DO-213AA package variant rather than the Mini MELF configuration, requiring PCB layout verification for mechanical compatibility. This part is RoHS non-compliant.

Tolerance-Relaxed Alternatives:

The CDLL5260A (Microchip Technology) with ±10% tolerance and CDLL5260 (Microchip Technology) with ±20% tolerance are Active production alternatives suitable for applications where zener voltage tolerance requirements are less stringent than the original ±5% specification. Both use the DO-213AB MELF package and are RoHS non-compliant.

Obsolete Status Parts:

The CZRL5260B-G (Comchip Technology) is classified as Obsolete and should not be selected for new designs despite meeting electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can I substitute the ZMM5260B-7 with any 43 V zener diode?

A: No. Substitution requires matching the complete electrical specification set: 43 V nominal voltage, ±5% tolerance, 500 mW power rating, 93 Ohms maximum impedance, and 100 nA maximum reverse leakage current at 33 V. Additionally, the part must support the -65°C to 175°C operating temperature range and use a compatible surface mount package (DO-213AC, MINI-MELF, or SOD-80).

Q: What is the difference between DO-213AC, MINI-MELF, and SOD-80 package designations?

A: These are equivalent package designations for the same physical form factor. DO-213AC is the JEDEC standard designation, MINI-MELF is the industry common name, and SOD-80 is an alternative designation. Parts specified with any of these designations are mechanically and electrically interchangeable.

Q: Why do some substitute parts show different forward voltage (Vf) values?

A: Forward voltage variation (1.1 V to 1.5 V at 200 mA) is within normal manufacturing tolerance for zener diodes and does not affect substitutability for the specified application. The zener voltage (43 V) and reverse leakage characteristics are the primary performance determinants.

Q: Are RoHS non-compliant parts acceptable substitutes?

A: RoHS compliance status depends on application requirements and regulatory jurisdiction. The original ZMM5260B-7 is ROHS3 compliant. If RoHS3 compliance is mandatory, select only substitute parts with ROHS3 compliant status: TZMC43-M-18, TZM5260B-GS08, TZM5260B-GS18, or CZRL5260B-G. For applications without RoHS requirements, RoHS non-compliant alternatives (1N5260BUR-1, CDLL5260, CDLL5260A, CDLL5260B) are functionally equivalent.

Q: What is the significance of product status (Active vs. Obsolete)?

A: Active status indicates current production and long-term supply availability. Obsolete status indicates the manufacturer has discontinued production. For new designs and ongoing production, select only Active status parts to ensure supply chain continuity. The ZMM5260B-7 and CZRL5260B-G are Obsolete; all other listed substitutes are Active.

Q: Can I use CDLL5260 or CDLL5260A if my application allows tolerance relaxation?

A: Yes, if your circuit design permits zener voltage tolerance greater than ±5%. The CDLL5260A offers ±10% tolerance and CDLL5260 offers ±20% tolerance. Both are Active production parts from Microchip Technology. However, verify that the relaxed tolerance does not compromise circuit performance before implementation.

Q: Why is the TZMC43-M-18 qualified as AEC-Q101?

A: AEC-Q101 qualification indicates the part meets automotive-grade reliability standards. This qualification is provided as additional information but does not affect substitutability for non-automotive applications. The part remains suitable for general industrial and commercial use.

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