Equivalent & Substitute Parts Reference for ZMM5252B-7

Part Overview

The Vishay General Semiconductor ZMM5252B-7 is a surface mount Zener Diode rated at 24 V and 500 mW in a Mini MELF DO-213AA package. It offers ±5% tolerance, maximum Zener impedance of 33 Ohms, reverse leakage of 100 nA @ 18 V, and forward voltage of 1.5 V @ 200 mA. With a wide operating temperature range from -65°C to 175°C, MSL 1 classification, and ROHS3 compliance, it is suitable for voltage regulation and protection in electronic designs. As this part is obsolete, identification of parametric equivalent or substitute Zener diodes is necessary for ongoing procurement and design continuity.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Packaging	Description	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	RoHS Status	ECCN	HTSUS
ZMM5252B-7	Vishay General Semiconductor - Diodes Division	Diodes, Zener	Tape & Reel (TR)	DIODE ZENER 24V 500MW MINI MELF	24 V	±5%	500 mW	33 Ohms	100 nA @ 18 V	1.5 V @ 200 mA	-65°C ~ 175°C (TJ)	Surface Mount	DO-213AA	Mini MELF	ROHS3 Compliant	EAR99	8541.10.0050

Substitute Part Grouping Explanation

Substitute selection for the ZMM5252B-7 Zener diode is strictly based on the following allowed electrical and mechanical parameters:

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
RoHS Status
ECCN
HTSUS

Only substitute part numbers that match all these key parameters are listed.

Parameter Comparison

Parameter	ZMM5252B-7 (Main)	1N5252BUR-1/TR (Substitute)
Manufacturer	Vishay General Semiconductor - Diodes Division	Microchip Technology
Category	Diodes, Zener	Diodes, Zener
Packaging	Tape & Reel (TR)	Tape & Reel (TR)
Voltage - Zener (Nom) (Vz)	24 V	24 V
Tolerance	±5%	±5%
Power - Max	500 mW	500 mW
Impedance (Max) (Zzt)	33 Ohms	33 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 18 V	100 nA @ 18 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 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 (Glass)
Supplier Device Package	Mini MELF	DO-213AA
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
ECCN	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050

Engineering Selection Recommendations

The primary selection criterion is product status. ZMM5252B-7 is listed as obsolete, while 1N5252BUR-1/TR is active. Both parts comply with ROHS3 standards and have identical ECCN and HTSUS classifications. The substitute part maintains all specified parametric requirements, package compatibility, and compliance certifications.

Frequently Asked Questions (FAQ)

Q1: What parameters are critical for selecting a substitute Zener diode?
A1: The critical parameters for substitution are Zener voltage, tolerance, maximum power dissipation, impedance, reverse leakage current, forward voltage, operating temperature range, mounting type, and package/case.

Q2: Is package compatibility guaranteed between ZMM5252B-7 and 1N5252BUR-1/TR?
A2: Both parts use the DO-213AA package, which supports physical and electrical compatibility in surface mount applications.

Q3: Can compliance status affect substitution?
A3: Yes. Both ZMM5252B-7 and 1N5252BUR-1/TR are ROHS3 compliant, ensuring substance and environmental regulatory alignment.

Q4: Why is a substitute required for ZMM5252B-7?
A4: ZMM5252B-7 is obsolete, necessitating the use of parametric equivalents like 1N5252BUR-1/TR for continued availability in designs.

Q5: Do the electrical ratings and mechanical form factor match between these parts?
A5: All specified electrical ratings and mechanical form factors are matched as per the provided parameters.

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