1N6472 Equivalent & Substitute Parts

Part Overview

The 1N6472 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This through-hole axial component features a 15V reverse standoff voltage with a 26.5V maximum clamping voltage and peak pulse current capability of 322A (8/20µs). The device is classified as active and currently in production. Substitute parts are identified to address specific application requirements, including alternative packaging formats, voltage ratings, and compliance certifications.

Substiute Parts

1N6472

Microchip TechnologyIn Stock: 10991N6472 Datasheet

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LCE15A

Littelfuse Inc.In Stock: 2372LCE15A Datasheet

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LCE18A

Littelfuse Inc.In Stock: 1007LCE18A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1N6472 are identified based on the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: Substitute parts must maintain the same reverse standoff voltage (15V) or operate within the application's acceptable voltage range. The 1N6472 operates at 15V standoff; substitutes with 15V or 18V standoff are functionally equivalent for different circuit protection scenarios.

Peak Pulse Current Capability: The 1N6472 handles 322A peak pulse current. Substitute parts with lower peak pulse current ratings (such as 61A or 51A) are suitable for applications with reduced transient energy requirements.

Clamping Voltage: The maximum clamping voltage of 26.5V determines the maximum voltage stress on protected circuitry. Substitutes with clamping voltages of 24.4V or 29.2V provide alternative protection thresholds.

Mounting and Packaging: The 1N6472 uses through-hole axial packaging. Substitute parts maintain through-hole mounting compatibility with alternative package designations (DO-201AA, DO-27).

Thermal Operating Range: All identified substitutes operate across the same temperature range (-55°C ~ 175°C), ensuring thermal compatibility.

Compliance and Regulatory Status: RoHS compliance status differs between the main part and substitutes, which may be relevant for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

1N6472 Primary Selection: The 1N6472 remains the primary choice for applications requiring the highest peak pulse current capability (322A) within the 15V standoff voltage class. This component is active in production and suitable for high-energy transient suppression. Note that this part is RoHS non-compliant; applications subject to RoHS3 regulations require alternative selection.

LCE15A Substitution: The LCE15A from Littelfuse provides equivalent reverse standoff voltage (15V) with reduced peak pulse current handling (61A). This substitute is appropriate for applications with lower transient energy levels and offers ROHS3 compliance. The lower clamping voltage (24.4V) provides tighter voltage regulation compared to the 1N6472.

LCE18A Substitution: The LCE18A operates at an 18V reverse standoff voltage with 51A peak pulse current capability. This substitute is suitable for circuits requiring higher voltage standoff protection and is ROHS3 compliant. The elevated clamping voltage (29.2V) accommodates applications with higher voltage transient thresholds.

Compliance Consideration: Both Littelfuse substitutes are ROHS3 compliant, whereas the 1N6472 is RoHS non-compliant. Selection between these options depends on regulatory requirements for the end application.

Frequently Asked Questions (FAQ)

Q: Can the LCE15A directly replace the 1N6472 in all applications?

A: The LCE15A shares the same 15V reverse standoff voltage and identical thermal operating range. However, the LCE15A peak pulse current rating (61A) is significantly lower than the 1N6472 (322A). Direct substitution is valid only for applications where transient energy levels do not exceed the LCE15A's 61A peak pulse specification. Verify circuit transient characteristics before substitution.

Q: What is the difference between the LCE15A and LCE18A?

A: The LCE15A operates at 15V reverse standoff voltage with 24.4V clamping voltage, matching the 1N6472 voltage class. The LCE18A operates at 18V reverse standoff with 29.2V clamping voltage, providing higher voltage protection. Selection depends on the protected circuit's nominal voltage and transient suppression requirements.

Q: Are all substitute parts through-hole compatible with the 1N6472 footprint?

A: All identified substitutes use through-hole axial mounting. However, package designations differ: the 1N6472 uses G axial packaging, while LCE15A and LCE18A use DO-201AA/DO-27 axial packaging. Physical dimensions may vary; verify mechanical compatibility with the PCB layout before substitution.

Q: Does RoHS compliance affect electrical performance?

A: RoHS compliance status does not alter electrical performance characteristics. The difference between RoHS non-compliant (1N6472) and ROHS3 compliant (LCE15A, LCE18A) parts reflects manufacturing process and material composition. Selection is driven by regulatory requirements for the end application, not performance.

Q: What peak pulse current should I use for substitution decisions?

A: The peak pulse current rating determines the maximum transient energy the TVS diode can safely suppress. The 1N6472 handles 322A (8/20µs), while substitutes handle 61A (LCE15A) or 51A (LCE18A). Substitution is valid only when the application's actual peak pulse current does not exceed the substitute part's rating.

Q: Can I use the LCE18A in a 15V circuit?

A: The LCE18A is rated for 18V reverse standoff voltage. In a 15V circuit, the device operates below its rated standoff voltage, which is acceptable from an electrical standpoint. However, the higher clamping voltage (29.2V) may not provide the same level of voltage regulation as the 1N6472 (26.5V) or LCE15A (24.4V) in that circuit.