ZMM5240B-13 Equivalent & Substitute Parts

Part Overview

The ZMM5240B-13 is a Zener diode rated at 10 V nominal voltage with 500 mW power dissipation capability, manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for voltage regulation and protection applications in surface mount configurations using the Mini MELF package format.

The ZMM5240B-13 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component specification.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	10	V
Tolerance	±5%	%
Power - Max	500	mW
Impedance (Max)	17	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 8 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 200 mA
Operating Temperature Range	-65 to 175	°C (TJ)
Mounting Type	Surface Mount	-
Package / Case	DO-213AA	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the ZMM5240B-13 is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

Zener voltage: 10 V nominal
Tolerance: ±5%
Maximum power dissipation: 500 mW
Maximum impedance: 17 Ohms
Reverse leakage current: 3 µA @ 8 V
Operating temperature range: -65°C to 175°C

Mechanical & Package Specifications:

Package type: DO-213AA (Mini MELF form factor)
Mounting configuration: Surface Mount

Compliance Requirements:

RoHS3 compliance
Moisture Sensitivity Level 1

The substitute part 1N5240BUR-1/TR meets all specified electrical parameters and package requirements, with the exception of forward voltage specification (1.1 V @ 200 mA versus 1.5 V @ 200 mA for the original part). This variance remains within acceptable engineering tolerances for Zener diode applications.

Parameter Comparison

Parameter	ZMM5240B-13 (Vishay)	1N5240BUR-1/TR (Microchip)	Match Status
Voltage - Zener (Nom)	10 V	10 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Impedance (Max)	17 Ohms	17 Ohms	Equivalent
Current - Reverse Leakage @ Vr	3 µA @ 8 V	3 µA @ 8 V	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.1 V @ 200 mA	Favorable Variance
Operating Temperature Range	-65°C to 175°C	-65°C to 175°C	Equivalent
Package / Case	DO-213AA	DO-213AA	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute Available

Engineering Selection Recommendations

The 1N5240BUR-1/TR manufactured by Microchip Technology is a direct parametric equivalent to the obsolete ZMM5240B-13. Selection of this substitute part is supported by the following factors:

Compliance & Availability: The substitute part maintains ROHS3 compliance and Moisture Sensitivity Level 1 classification, ensuring compatibility with current manufacturing and environmental standards. The part is classified as Active product status, providing assured long-term supply availability compared to the obsolete original part.

Electrical Performance: All critical electrical specifications match the original part exactly: 10 V nominal Zener voltage, ±5% tolerance, 500 mW maximum power dissipation, 17 Ohms maximum impedance, and 3 µA reverse leakage current. The forward voltage specification of the substitute (1.1 V @ 200 mA) is lower than the original specification (1.5 V @ 200 mA), which represents a favorable performance characteristic in forward conduction applications.

Package & Mechanical Compatibility: Both parts utilize the DO-213AA package in surface mount configuration, ensuring direct mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the 1N5240BUR-1/TR be used as a direct replacement for the ZMM5240B-13 in existing designs?

A: Yes. The 1N5240BUR-1/TR meets all specified electrical parameters and package requirements. Both components feature identical Zener voltage (10 V), tolerance (±5%), power rating (500 mW), impedance (17 Ohms), reverse leakage current (3 µA @ 8 V), and operating temperature range (-65°C to 175°C). The DO-213AA package format is identical, enabling direct PCB compatibility.

Q: What is the significance of the forward voltage difference between these parts?

A: The 1N5240BUR-1/TR exhibits a lower forward voltage (1.1 V @ 200 mA) compared to the ZMM5240B-13 (1.5 V @ 200 mA). This difference represents improved forward conduction efficiency in the substitute part and does not create compatibility issues in typical Zener diode applications where forward voltage is not a critical design parameter.

Q: Are there any compliance or environmental differences between these parts?

A: No. Both parts are ROHS3 compliant and classified as Moisture Sensitivity Level 1 (Unlimited). Both meet the same environmental and regulatory standards for electronic component manufacturing and use.

Q: Why is the original ZMM5240B-13 classified as obsolete?

A: The ZMM5240B-13 is listed as obsolete by the manufacturer. The 1N5240BUR-1/TR is classified as Active product status, indicating current production and assured availability for future procurement.

Q: What packaging format is supplied for the 1N5240BUR-1/TR?

A: The 1N5240BUR-1/TR is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly operations. The component maintains the DO-213AA package specification.

Q: Are the operating temperature ranges identical?

A: Yes. Both the ZMM5240B-13 and 1N5240BUR-1/TR operate across the identical temperature range of -65°C to 175°C (TJ), ensuring thermal performance equivalence across all application environments.

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