Littelfuse 30KPA30 TVS Diode Equivalent & Substitute Parts

Part Overview

The Littelfuse 30KPA30 is a unidirectional Zener-type transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. This component features a 30V reverse standoff voltage with a 57.96V maximum clamping voltage and peak pulse current handling of 548.9A. The part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

30KPA30

Littelfuse Inc.In Stock: 80230KPA30 Datasheet

Current PartRFQ

30KPA30A

MDE Semiconductor IncIn Stock: 127030KPA30A Datasheet

DirectRFQ

30KP30A-TP

Micro Commercial CoIn Stock: 86830KP30A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 30KPA30 TVS diode is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff: 30V (exact match required)
• Voltage - Clamping (Max) @ Ipp: within acceptable tolerance range
• Current - Peak Pulse (10/1000µs): 548.9A or equivalent
• Power - Peak Pulse: 30000W (30kW)
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C to 175°C (TJ)
• RoHS Compliance: ROHS3 Compliant

The identified substitute parts maintain compatibility across these core electrical and mechanical parameters while offering active product status and improved availability compared to the obsolete 30KPA30.

Parameter Comparison

Engineering Selection Recommendations

30KPA30A (MDE Semiconductor Inc): This substitute maintains identical reverse standoff voltage (30V), peak pulse current (548.9A), and power dissipation (30kW) specifications. The clamping voltage is reduced from 57.96V to 55.2V, representing a 4.7% decrease. The part carries active product status with ROHS3 compliance and MSL rating of 1 (Unlimited), supporting long-term procurement availability. Packaging remains P600 axial configuration, ensuring mechanical compatibility with existing PCB layouts.

30KP30A-TP (Micro Commercial Co): This substitute maintains the 30V reverse standoff voltage and 30kW power dissipation. The clamping voltage matches the 30KPA30A at 55.2V. The package configuration differs, using R-6 axial format instead of P600, requiring PCB footprint verification. Peak pulse current is not specified in available documentation. The part is active with ROHS3 compliance and REACH Unaffected status.

Selection between active substitutes should prioritize package compatibility with existing designs. The 30KPA30A preserves the original P600 package footprint, minimizing redesign requirements. The 30KP30A-TP requires package footprint evaluation due to R-6 configuration differences.

Frequently Asked Questions (FAQ)

Q: Can the 30KPA30A directly replace the 30KPA30 in existing designs? A: The 30KPA30A maintains electrical compatibility across all critical parameters: 30V reverse standoff, 548.9A peak pulse current, and 30kW power dissipation. The P600 axial package is identical, supporting direct PCB substitution without layout modifications.

Q: What is the significance of the clamping voltage difference between 57.96V and 55.2V? A: Both substitute parts reduce the maximum clamping voltage by approximately 4.7% compared to the original 30KPA30. This represents a tighter voltage clamp, which may provide improved transient suppression in applications where lower clamping voltage is beneficial. Circuit performance impact depends on specific application requirements.

Q: Why does the 30KP30A-TP show no peak pulse current specification? A: The available technical documentation for the 30KP30A-TP does not include peak pulse current data. This parameter gap requires consultation of the manufacturer's complete datasheet before selection for applications where peak pulse current specification is a critical design parameter.

Q: Are both substitute parts suitable for the same operating temperature range? A: Yes. Both 30KPA30A and 30KP30A-TP support the identical operating temperature range of -55°C to 175°C (TJ), matching the original 30KPA30 specification.

Q: What packaging considerations apply to the 30KP30A-TP? A: The 30KP30A-TP uses R-6 axial package format, differing from the original P600 package. PCB footprint compatibility must be verified before selection. The 30KPA30A maintains the original P600 package, eliminating this consideration.

Q: Do both substitutes meet RoHS compliance requirements? A: Yes. Both 30KPA30A and 30KP30A-TP carry ROHS3 Compliant certification, matching the original 30KPA30 compliance status.