30KPA45C-B Equivalent & Substitute Parts

Part Overview

The 30KPA45C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 45V reverse standoff voltage, 81.27V maximum clamping voltage, and 391.5A peak pulse current capability in a through-hole P600 axial package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar protection characteristics.

Substiute Parts

30KPA45C-B

LittelfuseIn Stock: 113530KPA45C-B Datasheet

Current PartRFQ

30KPA45CA

MDE Semiconductor IncIn Stock: 150230KPA45CA Datasheet

DirectRFQ

30KPA45CA-B

Littelfuse Inc.In Stock: 103330KPA45CA-B Datasheet

DirectRFQ

15KPA45CAE3/TR13

Microchip TechnologyIn Stock: 95615KPA45CAE3/TR13 Datasheet

MFR RecommendedRFQ

30KP45CA-TP

Micro Commercial CoIn Stock: 94130KP45CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 30KPA45C-B is determined by the following critical parameters: reverse standoff voltage (45V), bidirectional channel configuration (1 channel), mounting type (through-hole), package form factor (P600 or compatible axial), operating temperature range (-55°C to 175°C), and RoHS3 compliance. Parts meeting these core electrical and mechanical specifications are classified as direct substitutes. Secondary considerations include clamping voltage performance, peak pulse current rating, and product status (active vs. obsolete). Parts with reduced peak pulse current or power ratings represent functional alternatives for lower-stress applications but require circuit-level validation.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 Direct Substitutes (Preferred): 30KPA45CA and 30KPA45CA-B maintain identical electrical performance specifications (45V standoff, 391.5A peak pulse current, 30kW peak power) and are available in active product status. Both are P600 axial through-hole packages with ROHS3 compliance. 30KPA45CA-B is manufactured by Littelfuse, the original equipment manufacturer, providing continuity of supply chain and design validation. 30KPA45CA from MDE Semiconductor Inc offers equivalent performance with bulk packaging availability.

Tier 2 Functional Alternatives: 30KP45CA-TP from Micro Commercial Co provides 45V standoff and 77.4V clamping voltage in an R-6 axial package with 30kW peak power rating. This part is suitable for applications where package footprint compatibility with R-6 form factor is acceptable. Peak pulse current specification is not provided; circuit-level analysis is required to confirm adequacy.

Tier 3 Reduced-Rating Alternative: 15KPA45CAE3/TR13 from Microchip Technology maintains 45V standoff voltage and operating temperature range but operates at reduced peak pulse current (207.4A) and peak power (15kW). This part is applicable only to lower-stress protection circuits where the reduced current and power ratings are compatible with system requirements. Tape & Reel packaging is standard for this part.

All substitute parts maintain ROHS3 compliance and the required -55°C to 175°C operating temperature range. Product status verification confirms that 30KPA45CA, 30KPA45CA-B, 15KPA45CAE3/TR13, and 30KP45CA-TP are all active components with current manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can 30KPA45CA directly replace 30KPA45C-B in existing designs? A: Yes. 30KPA45CA meets all critical electrical parameters: 45V reverse standoff voltage, 391.5A peak pulse current, 30kW peak power, and P600 through-hole axial package. Both are ROHS3 compliant with identical operating temperature ranges (-55°C to 175°C). The primary difference is product status (active vs. obsolete) and manufacturer (MDE Semiconductor Inc vs. Littelfuse).

Q: What is the difference between 30KPA45CA-B and 30KPA45CA? A: Both parts are electrically identical with 45V standoff, 391.5A peak pulse current, and 30kW peak power in P600 axial packages. 30KPA45CA-B is manufactured by Littelfuse (original manufacturer), while 30KPA45CA is from MDE Semiconductor Inc. Both are active products with ROHS3 compliance. Selection depends on supply chain preference and packaging requirements (bulk vs. alternative formats).

Q: Is 15KPA45CAE3/TR13 a suitable replacement for high-current applications? A: No. 15KPA45CAE3/TR13 operates at 207.4A peak pulse current and 15kW peak power, representing a 47% reduction compared to the 30KPA45C-B specification (391.5A, 30kW). This part is suitable only for applications with lower transient current requirements. Circuit-level analysis is required to confirm compatibility.

Q: What is the package difference between 30KP45CA-TP and other substitutes? A: 30KP45CA-TP uses an R-6 axial package, while 30KPA45C-B and most direct substitutes use P600 axial packages. Both are through-hole axial form factors, but physical dimensions differ. Verify PCB footprint compatibility before selection. Peak pulse current for 30KP45CA-TP is not specified in available documentation.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (30KPA45CA, 30KPA45CA-B, 15KPA45CAE3/TR13, and 30KP45CA-TP) are ROHS3 compliant, matching the compliance status of the 30KPA45C-B.

Q: What packaging formats are available for these substitutes? A: 30KPA45CA and 30KPA45CA-B are available in bulk packaging. 15KPA45CAE3/TR13 and 30KP45CA-TP are supplied in Tape & Reel (TR) format. Select based on procurement volume and assembly process requirements.