ZMM5245B-13 Equivalent & Substitute Parts

Part Overview

The ZMM5245B-13 is a Zener diode rated at 15 V nominal voltage with 500 mW power dissipation, 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 ZMM5245B-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)	15	V
Tolerance	±5%	%
Power - Max	500	mW
Impedance (Max)	16	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 11 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 ZMM5245B-13 is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

Zener voltage: 15 V nominal
Tolerance: ±5%
Maximum power dissipation: 500 mW
Maximum impedance: 16 Ohms
Reverse leakage current: 100 nA @ 11 V
Operating temperature range: -65°C to 175°C

Mechanical & Package Specifications:

Mounting type: Surface Mount
Package designation: DO-213AA
Moisture sensitivity level: 1 (Unlimited)

Compliance Requirements:

RoHS3 compliance
ECCN: EAR99
HTSUS: 8541.10.0050

Substitute parts must match all electrical parameters within stated tolerances and maintain identical package and compliance specifications. Forward voltage characteristics may vary within acceptable limits for the application category.

Parameter Comparison

Parameter	ZMM5245B-13 (Vishay)	1N5245BUR-1/TR (Microchip)	Match Status
Voltage - Zener (Nom)	15 V	15 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Impedance (Max)	16 Ohms	16 Ohms	Equivalent
Current - Reverse Leakage @ Vr	100 nA @ 11 V	100 nA @ 11 V	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.1 V @ 200 mA	Within Tolerance
Operating Temperature Range	-65°C to 175°C	-65°C to 175°C	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	DO-213AA	DO-213AA	Equivalent
RoHS Status	ROHS3 Compliant	Not specified in data	Main part compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

1N5245BUR-1/TR (Microchip Technology) - Active Status

The 1N5245BUR-1/TR is classified as an active product with current manufacturing status and documented inventory availability (1801 Pcs). This substitute meets all critical electrical parameters specified for the ZMM5245B-13, including zener voltage, power rating, impedance, and reverse leakage characteristics. The forward voltage specification (1.1 V @ 200 mA) is lower than the original part (1.5 V @ 200 mA), which represents an improvement in forward conduction characteristics and does not compromise circuit functionality.

Both components share identical package designation (DO-213AA), operating temperature range (-65°C to 175°C), and moisture sensitivity classification (MSL 1). The substitute part is supplied in Tape & Reel format, suitable for automated assembly processes.

The transition from the obsolete ZMM5245B-13 to the active 1N5245BUR-1/TR provides supply chain continuity while maintaining full electrical and mechanical compatibility for 15 V zener diode applications.

Frequently Asked Questions (FAQ)

Q: What makes 1N5245BUR-1/TR a valid substitute for ZMM5245B-13?

A: The 1N5245BUR-1/TR matches all critical electrical specifications: 15 V nominal zener voltage, ±5% tolerance, 500 mW maximum power dissipation, 16 Ohms maximum impedance, and 100 nA reverse leakage current. Both components use the DO-213AA package for surface mount applications and operate across the identical temperature range (-65°C to 175°C).

Q: Are there differences in forward voltage between these parts?

A: Yes. The ZMM5245B-13 specifies 1.5 V maximum forward voltage at 200 mA, while the 1N5245BUR-1/TR specifies 1.1 V at the same current. The lower forward voltage of the substitute part does not create compatibility issues and may provide improved efficiency in forward conduction scenarios.

Q: Can I use 1N5245BUR-1/TR in existing PCB designs without modification?

A: Yes. Both components use the DO-213AA package format and are surface mount devices with identical pinout and footprint requirements. No PCB layout modifications are necessary.

Q: What is the supply status difference between these parts?

A: The ZMM5245B-13 is obsolete with limited remaining inventory (750 Pcs). The 1N5245BUR-1/TR is an active product with current manufacturing and higher inventory availability (1801 Pcs), ensuring long-term supply chain support.

Q: Are moisture sensitivity levels the same?

A: Yes. Both components are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: What packaging format is the substitute supplied in?

A: The 1N5245BUR-1/TR is supplied in Tape & Reel (TR) format, standard for automated surface mount assembly processes.

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