Equivalent & Substitute Parts Reference for ZMM5242B-7

Part Overview

The Vishay General Semiconductor ZMM5242B-7 is a Zener Diode rated at 12 V with 500 mW power, ±5% tolerance, provided in a surface mount Mini MELF (DO-213AA) package. It is classified under the Diodes, Zener category. The part status is obsolete, making it necessary to identify equivalent replacement models with matching electrical and mechanical characteristics to support ongoing production, repair, or design continuity.

Key Parameters

Manufacturer Part Number	Category	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	Moisture Sensitivity Level (MSL)	ECCN	HTSUS
ZMM5242B-7	Diodes, Zener	12 V	±5%	500 mW	30 Ohms	1 µA @ 9.1 V	1.5 V @ 200 mA	-65°C ~ 175°C (TJ)	Surface Mount	DO-213AA	Mini MELF	1 (Unlimited)	EAR99	8541.10.0050

Substitute Part Grouping Explanation

Substitute parts are selected based strictly on matching the fundamental parameters that determine equivalence in electrical function and mechanical compatibility for Diodes, Zener category. All provided substitute part numbers have:

The same Zener voltage rating (12 V)
Identical power rating (500 mW)
Equivalent tolerance (±5%)
Matching maximum impedance (30 Ohms)
Equivalent reverse leakage current and test voltage
Compatible forward voltage characteristics
Identical operating temperature range
Same mounting type (Surface Mount)
The same package / case (DO-213AA)
Matching moisture sensitivity level (MSL 1)
Consistent ECCN and HTSUS classification

Parameter Comparison

Parameter	ZMM5242B-7 (Vishay General Semiconductor)	1N5242BUR-1/TR (Microchip Technology)
Category	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom) (Vz)	12 V	12 V
Tolerance	±5%	±5%
Power - Max	500 mW	500 mW
Impedance (Max) (Zzt)	30 Ohms	30 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 9.1 V	1 µA @ 9.1 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.1 V @ 200 mA
Operating Temperature	-65°C ~ 175°C (TJ)	-65°C ~ 175°C (TJ)
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-213AA	DO-213AA
Supplier Device Package	Mini MELF	DO-213AA
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050

Engineering Selection Recommendations

Replacement selection is necessitated by the obsolete status of ZMM5242B-7. 1N5242BUR-1/TR is active and provides RoHS compliance, identical ECCN, and HTSUS classifications, as well as the same moisture sensitivity level (MSL 1), ensuring suitability for direct interchange in applications with matching electrical and form factor requirements.

Frequently Asked Questions (FAQ)

Q1: What electrical characteristics must match when selecting a substitute for ZMM5242B-7?
A1: Key parameters include Zener voltage (12 V), power dissipation (500 mW), tolerance (±5%), maximum impedance (30 Ohms), reverse leakage current, and forward voltage at specified test currents.

Q2: Are there package or mounting compatibility concerns with 1N5242BUR-1/TR as a substitute?
A2: Both ZMM5242B-7 and 1N5242BUR-1/TR share the DO-213AA package and surface mount Mini MELF form, ensuring mechanical compatibility.

Q3: Is the substitute part compliant with the same environmental and regulatory classifications as the original?
A3: Both parts have identical RoHS compliance, ECCN (EAR99), and HTSUS (8541.10.0050) classifications, supporting interchange where these designations are required.

Q4: Does the operating temperature range differ between the original and substitute parts?
A4: The operating temperature range is identical: -65°C to 175°C (TJ).

Q5: Is there any difference in moisture sensitivity between ZMM5242B-7 and 1N5242BUR-1/TR?
A5: Both parts have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), maintaining compatibility for relevant storage and handling protocols.

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