30KPA28 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 30KPA28 is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 28V reverse standoff voltage with a 52.5V maximum clamping voltage and 606A peak pulse current capability in a through-hole P600 axial package.

The 30KPA28 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

30KPA28

Littelfuse Inc.In Stock: 119230KPA28 Datasheet

Current PartRFQ

30KPA28A

MDE Semiconductor IncIn Stock: 210130KPA28A Datasheet

DirectRFQ

3KP28A-TP

Micro Commercial CoIn Stock: 19123KP28A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 30KPA28 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 28V (exact match required)
• Unidirectional Channels: 1 (single channel configuration)
• Type: Zener (diode type)
• Mounting Type: Through Hole (mechanical compatibility)
• Operating Temperature Range: -55°C ~ 175°C (thermal envelope)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

Substitute parts must maintain the 28V reverse standoff voltage specification and support through-hole mounting. Variations in clamping voltage, peak pulse current, and power dissipation are permissible within the functional requirements of the application, provided the reverse standoff voltage and thermal operating range remain consistent.

Parameter Comparison

Engineering Selection Recommendations

The 30KPA28A (MDE Semiconductor Inc) is the direct equivalent substitute. This part maintains identical reverse standoff voltage (28V), peak pulse current (606A), power dissipation (30kW), and thermal operating range (-55°C ~ 175°C). The 30KPA28A is in active production status with ROHS3 compliance and represents the primary replacement for obsolete 30KPA28 inventory.

The 3KP28A-TP (Micro Commercial Co) is the manufacturer-recommended alternative. This part maintains the 28V reverse standoff voltage and thermal operating range but operates in a different package form (R-6 versus P600) and exhibits reduced power dissipation (3kW versus 30kW). Selection of the 3KP28A-TP requires confirmation that application power requirements do not exceed 3kW peak pulse dissipation. This part is in active production status with ROHS3 compliance.

Both substitute parts carry ROHS3 compliance certification, meeting regulatory requirements equivalent to the original 30KPA28.

Frequently Asked Questions (FAQ)

Q: Can the 30KPA28A be used as a direct replacement for the 30KPA28?

A: Yes. The 30KPA28A maintains identical electrical specifications for reverse standoff voltage (28V), peak pulse current (606A), power dissipation (30kW), and thermal operating range (-55°C ~ 175°C). Both components use the P600 axial through-hole package. The 30KPA28A is in active production status.

Q: What is the difference between the 30KPA28A and 3KP28A-TP?

A: Both parts maintain the 28V reverse standoff voltage and -55°C ~ 175°C thermal operating range. The primary differences are: (1) Package form: 30KPA28A uses P600; 3KP28A-TP uses R-6; (2) Power dissipation: 30KPA28A rated at 30kW; 3KP28A-TP rated at 3kW. Selection depends on application power requirements and mechanical package constraints.

Q: Are package differences between P600 and R-6 significant for substitution?

A: Yes. P600 and R-6 are distinct axial through-hole package forms with different physical dimensions and lead configurations. Mechanical compatibility with the printed circuit board layout must be verified before substitution. Both are through-hole mounting types suitable for wave soldering and manual insertion.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. The 30KPA28A and 3KP28A-TP are both ROHS3 compliant, matching the compliance status of the original 30KPA28.

Q: What should be considered when selecting between available substitutes?

A: Selection criteria include: (1) Product status (30KPA28A and 3KP28A-TP are both active); (2) Package compatibility with existing PCB design (P600 versus R-6); (3) Power dissipation requirements (30kW versus 3kW); (4) Inventory availability and lead time; (5) Cost considerations.