30KPA71 Equivalent & Substitute Parts

Part Overview

The 30KPA71 is a unidirectional Zener-type Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 71V reverse standoff voltage rating and 117.08V maximum clamping voltage with peak pulse current handling of 271.7A. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

30KPA71

Littelfuse Inc.In Stock: 121930KPA71 Datasheet

Current PartRFQ

30KPA71A

MDE Semiconductor IncIn Stock: 200030KPA71A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 30KPA71 is determined by the following critical electrical and mechanical parameters:

• Voltage Rating Match: Reverse standoff voltage of 71V (typical) with breakdown voltage minimum of 74.94V
• Current Handling: Peak pulse current of 271.7A at 10/1000µs pulse duration
• Power Dissipation: Peak pulse power rating of 30000W (30kW)
• Clamping Voltage: Maximum clamping voltage at peak pulse current (Ipp) must be compatible with circuit protection requirements
• Package Compatibility: P600 axial through-hole package for direct mechanical and electrical substitution
• Temperature Range: Operating temperature range of -55°C to 175°C (junction temperature)
• Regulatory Compliance: ROHS3 compliance for environmental and regulatory alignment

The 30KPA71A from MDE Semiconductor Inc. qualifies as a direct substitute based on matching all critical parameters within acceptable engineering tolerances for this product category.

Parameter Comparison

Engineering Selection Recommendations

The 30KPA71A is the qualified substitute for the obsolete 30KPA71. Selection is based on the following engineering criteria:

Product Status: The 30KPA71A maintains active product status with MDE Semiconductor Inc., ensuring ongoing availability and supply chain continuity compared to the obsolete 30KPA71.

Regulatory Compliance: Both components maintain ROHS3 compliance, satisfying environmental and regulatory requirements for equivalent substitution in applications requiring compliant components.

Electrical Equivalence: The 30KPA71A matches all critical electrical parameters including reverse standoff voltage (71V), peak pulse current (271.7A), and peak pulse power (30kW). The clamping voltage of the 30KPA71A (111.5V maximum) is lower than the original part (117.08V maximum), providing improved transient suppression performance within the same voltage class.

Mechanical Compatibility: Identical P600 axial through-hole packaging ensures direct board-level substitution without design modification or rework.

Frequently Asked Questions (FAQ)

Q: Can the 30KPA71A be used as a direct replacement for the 30KPA71 in existing designs?

A: Yes. The 30KPA71A is electrically and mechanically compatible with the 30KPA71. Both components share identical reverse standoff voltage (71V), peak pulse current (271.7A), power rating (30kW), operating temperature range (-55°C to 175°C), and P600 axial through-hole package. Direct substitution is possible without circuit redesign.

Q: What is the difference in clamping voltage between these parts?

A: The 30KPA71 has a maximum clamping voltage of 117.08V at peak pulse current, while the 30KPA71A has a maximum clamping voltage of 111.5V. The lower clamping voltage of the 30KPA71A provides superior transient suppression performance and is acceptable for applications designed around the 30KPA71 specification.

Q: Are both parts RoHS compliant?

A: Yes. Both the 30KPA71 and 30KPA71A are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component use in regulated markets.

Q: Why is the 30KPA71 obsolete?

A: The 30KPA71 is classified as obsolete by Littelfuse Inc. The 30KPA71A from MDE Semiconductor Inc. provides equivalent functionality with active product status, ensuring continued availability for new designs and field replacements.

Q: What is the breakdown voltage difference between these parts?

A: The 30KPA71 has a minimum breakdown voltage of 74.94V, while the 30KPA71A has a minimum breakdown voltage of 79.3V. Both values fall within the acceptable range for 71V-class TVS diodes and do not affect substitution compatibility for general-purpose transient voltage protection applications.