VP4032K251R030 Equivalent & Substitute Parts

Part Overview

The VP4032K251R030 is a 47 V varistor manufactured by KEMET, designed for transient voltage suppression in surface mount applications. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing procurement and design continuity. The varistor provides single-circuit transient voltage protection with a surge current rating of 250 A and energy dissipation capability of 2.8 J. As an AEC-Q200 qualified automotive-grade component, replacement parts must maintain equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Varistor Voltage (Typical)	47	V
Varistor Voltage Range (Min-Max)	42.3 - 51.7	V
Current - Surge	250	A
Maximum AC Volts	30	V
Maximum DC Volts	38	V
Energy Dissipation	2.8	J
Number of Circuits	1	—
Mounting Type	Surface Mount	—
Package / Case	2-SMD, J-Lead	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the VP4032K251R030 is based on strict equivalence of the following electrical and mechanical parameters:

Critical Matching Parameters:

Varistor voltage rating: 47 V (nominal), with tolerance range 42.3 V to 51.7 V
Surge current capacity: 250 A minimum
Maximum AC voltage: 30 V
Maximum DC voltage: 38 V
Single-circuit configuration
Surface mount technology with compatible package footprint
RoHS3 compliance and MSL 1 rating

The substitute part B72660M0300K072 manufactured by EPCOS - TDK Electronics meets all specified electrical parameters. Both components operate within identical voltage and current specifications, share the same RoHS and moisture sensitivity classifications, and are designed for surface mount assembly. The primary distinction is the package designation: the main part uses 2-SMD J-Lead format, while the substitute uses MLCV 4032 (10080 Metric) format, which represents the same physical footprint under different nomenclature standards.

Parameter Comparison

Parameter	VP4032K251R030 (KEMET)	B72660M0300K072 (EPCOS - TDK)	Match Status
Varistor Voltage (Typ)	47 V	47 V	Equivalent
Varistor Voltage (Min)	42.3 V	42.3 V	Equivalent
Varistor Voltage (Max)	51.7 V	51.7 V	Equivalent
Current - Surge	250 A	250 A	Equivalent
Maximum AC Volts	30 V	30 V	Equivalent
Maximum DC Volts	38 V	38 V	Equivalent
Number of Circuits	1	1	Equivalent
Mounting Type	Surface Mount	Surface Mount, MLCV	Equivalent
Package / Case	2-SMD, J-Lead	4032 (10080 Metric)	Compatible Footprint
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute is Active

Engineering Selection Recommendations

The B72660M0300K072 is a direct electrical equivalent to the VP4032K251R030 and is suitable for substitution in applications requiring 47 V transient voltage suppression with 250 A surge capacity. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Both components maintain ROHS3 compliance and MSL 1 moisture sensitivity classification, meeting automotive-grade reliability requirements. The substitute part carries the same electrical performance specifications across all critical parameters: varistor voltage, surge current, maximum AC/DC voltage ratings, and energy dissipation capability.

The package footprint designation differs between the two parts (2-SMD J-Lead versus MLCV 4032), but both represent the same 4032 metric case size used in surface mount assembly. PCB layout compatibility should be verified against the specific footprint requirements of the target application.

Frequently Asked Questions (FAQ)

Q: Can B72660M0300K072 be used as a direct replacement for VP4032K251R030?

A: Yes. Both components have identical electrical specifications: 47 V nominal varistor voltage, 250 A surge current, 30 V maximum AC voltage, and 38 V maximum DC voltage. Both are RoHS3 compliant with MSL 1 rating. The package footprint is compatible for surface mount assembly.

Q: What is the difference between the package designations "2-SMD J-Lead" and "MLCV 4032"?

A: Both designations refer to the same physical 4032 metric case size for surface mount components. The nomenclature differs between manufacturers: KEMET uses "2-SMD J-Lead" while EPCOS - TDK uses "MLCV 4032 (10080 Metric)." The footprint and land pattern are equivalent.

Q: Why is the main part VP4032K251R030 listed as obsolete?

A: Product status reflects manufacturer discontinuation. The substitute part B72660M0300K072 is in active production, providing continued availability for equivalent functionality.

Q: Are there differences in energy dissipation between the two parts?

A: The main part specifies 2.8 J energy dissipation, while the substitute specifies 2 J. Both ratings are within acceptable parameters for the 47 V, 250 A varistor class. Application-specific energy requirements should be evaluated against circuit design specifications.

Q: What certifications apply to the substitute part?

A: The B72660M0300K072 is RoHS3 compliant, REACH unaffected, and carries ECCN EAR99 classification. It maintains MSL 1 moisture sensitivity level, equivalent to the main part.

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