ZMM5247B-7 Equivalent & Substitute Parts

Part Overview

The ZMM5247B-7 is a Zener diode rated at 17 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 ZMM5247B-7 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)	17	V
Tolerance	±5	%
Power - Max	500	mW
Impedance (Max)	19	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 13 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 ZMM5247B-7 is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

Zener voltage: 17 V nominal
Tolerance: ±5%
Maximum power dissipation: 500 mW
Maximum impedance: 19 Ohms
Reverse leakage current: 100 nA @ 13 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 & Regulatory:

RoHS3 compliance required
ECCN: EAR99
HTSUS code: 8541.10.0050

Substitute parts must match all electrical parameters within stated tolerances and maintain identical package and environmental specifications. Packaging format (Tape & Reel vs. bulk) does not affect electrical equivalence.

Parameter Comparison

Parameter	ZMM5247B-7 (Vishay)	1N5247BUR-1/TR (Microchip)	Match Status
Voltage - Zener (Nom)	17 V	17 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Impedance (Max)	19 Ohms	19 Ohms	Equivalent
Current - Reverse Leakage @ Vr	100 nA @ 13 V	100 nA @ 13 V	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.1 V @ 200 mA	Compatible (Lower Vf)
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
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
RoHS Status	ROHS3 Compliant	Not specified in data	Verify with supplier

Engineering Selection Recommendations

The 1N5247BUR-1/TR manufactured by Microchip Technology is a parametric equivalent to the ZMM5247B-7. All critical electrical specifications match within stated tolerances. Both components utilize the DO-213AA surface mount package and support identical operating temperature ranges.

The primary distinction between these components is product status: the ZMM5247B-7 is obsolete, while the 1N5247BUR-1/TR is active. This status difference makes the Microchip part suitable for new designs and ongoing production support.

The 1N5247BUR-1/TR exhibits a lower forward voltage (1.1 V @ 200 mA) compared to the ZMM5247B-7 (1.5 V @ 200 mA). This difference is within normal manufacturing variation for Zener diodes and does not affect functional equivalence in voltage regulation applications.

Both components are supplied with RoHS3 compliance and identical moisture sensitivity ratings, supporting equivalent environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1N5247BUR-1/TR directly replace the ZMM5247B-7 in existing designs?

A: Yes. The 1N5247BUR-1/TR meets all electrical and mechanical specifications of the ZMM5247B-7. Both components share identical zener voltage (17 V), power rating (500 mW), impedance (19 Ohms), and package format (DO-213AA). Direct substitution is supported without circuit modification.

Q: What is the significance of the different forward voltage specifications?

A: The ZMM5247B-7 specifies 1.5 V maximum forward voltage at 200 mA, while the 1N5247BUR-1/TR specifies 1.1 V. This difference represents normal manufacturing variation within the Zener diode product category and does not impact voltage regulation performance. Both values fall within acceptable operating parameters for this component class.

Q: Does packaging format affect substitution compatibility?

A: No. The 1N5247BUR-1/TR is supplied in Tape & Reel format, while the ZMM5247B-7 may be supplied in alternative packaging. Both use the DO-213AA package designation. Packaging format affects handling and assembly logistics but does not affect electrical equivalence or circuit performance.

Q: Why is the ZMM5247B-7 classified as obsolete?

A: Product obsolescence reflects manufacturer discontinuation decisions. The 1N5247BUR-1/TR, classified as active, provides continued availability for this specification level and supports long-term supply chain requirements.

Q: Are there compliance differences between these components?

A: Both components are RoHS3 compliant with identical moisture sensitivity levels (MSL 1 - Unlimited). Regulatory and environmental specifications are equivalent.

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