P4KE82 Equivalent & Substitute Parts

Part Overview

The P4KE82 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in through-hole applications. This component operates with a reverse standoff voltage of 70.1V and provides peak pulse power dissipation of 400W. The P4KE82 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. Substitute parts maintain functional compatibility through equivalent electrical characteristics and identical packaging specifications.

Substiute Parts

P4KE82

Littelfuse Inc.In Stock: 920P4KE82 Datasheet

Current PartRFQ

P4KE82A

Taiwan Semiconductor CorporationIn Stock: 6250P4KE82A Datasheet

DirectRFQ

SA70A

Taiwan Semiconductor CorporationIn Stock: 890SA70A Datasheet

MFR RecommendedRFQ

P4KE82A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 923P4KE82A-E3/54 Datasheet

DirectRFQ

P4KE82AHE3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1087P4KE82AHE3/54 Datasheet

DirectRFQ

P4KE82A-AP

Micro Commercial CoIn Stock: 704P4KE82A-AP Datasheet

MFR RecommendedRFQ

P4KE82A-BP

Micro Commercial CoIn Stock: 822P4KE82A-BP Datasheet

MFR RecommendedRFQ

P4KE82A-G

Comchip TechnologyIn Stock: 939P4KE82A-G Datasheet

MFR RecommendedRFQ

P4KE82A-TP

Micro Commercial CoIn Stock: 1024P4KE82A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE82 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Reverse standoff voltage: 70.1V (±tolerance)
• Clamping voltage range: 113V to 118.65V @ Ipp
• Peak pulse current: 4.6A to 4.6A (10/1000µs)
• Peak pulse power: 400W to 500W
• Package type: DO-204AL (DO-41) or DO-204AC (DO-15)
• Mounting: Through-hole axial configuration
• Operating temperature range: -55°C to 175°C (or -55°C to 150°C minimum)
• Unidirectional topology: Single channel Zener diode

Substitutes are grouped into two categories:

Category 1: Direct Electrical Equivalents (DO-204AL / DO-41 Package) Parts maintaining identical package specification and clamping voltage within 113V range: P4KE82A, P4KE82A-E3/54, P4KE82AHE3/54, P4KE82A-AP, P4KE82A-BP, P4KE82A-G, P4KE82A-TP

Category 2: Manufacturer-Recommended Alternative (DO-204AC / DO-15 Package) Part with enhanced current rating and higher power dissipation but different package footprint: SA70A

Parameter Comparison

Engineering Selection Recommendations

For Direct Package Compatibility (DO-204AL / DO-41):

Select from P4KE82A, P4KE82A-E3/54, P4KE82AHE3/54, P4KE82A-AP, P4KE82A-BP, P4KE82A-G, or P4KE82A-TP when board layout and mechanical constraints require identical through-hole axial package footprint. All maintain 70.1V reverse standoff voltage and 400W peak pulse power rating. Peak pulse current ranges from 4.6A to 3.7A, within acceptable tolerance for the original P4KE82 specification of 3.6A.

For Automotive Applications:

P4KE82AHE3/54 (Vishay) is qualified to AEC-Q101 automotive standard and supplied in tape & reel packaging. This variant is suitable for automotive-grade circuit protection where qualification documentation is required.

For Enhanced Current Margin (DO-204AC / DO-15):

SA70A (Taiwan Semiconductor Corporation) provides 4.6A peak pulse current and 500W peak pulse power dissipation, offering increased design margin. This part requires PCB layout modification due to different package footprint (DO-204AC vs. DO-204AL). Selection is appropriate when thermal or current stress analysis indicates benefit from higher power rating.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity). P4KE82A-G operates at maximum temperature of 150°C versus 175°C for other variants; verify thermal design margins before selection if operating near upper temperature limits.

Frequently Asked Questions (FAQ)

Q: Can P4KE82A directly replace P4KE82 without PCB modification?

A: Yes. P4KE82A maintains identical DO-204AL (DO-41) package footprint, reverse standoff voltage of 70.1V, and 400W peak pulse power rating. Peak pulse current is 3.7A versus 3.6A original specification, representing a 2.8% increase within acceptable tolerance for general-purpose TVS applications.

Q: What is the difference between P4KE82A variants from different manufacturers?

A: All P4KE82A variants (Taiwan Semiconductor, Vishay, Micro Commercial, Comchip) maintain equivalent electrical specifications: 70.1V reverse standoff, 113V clamping voltage, and 400W power dissipation. Differences exist in peak pulse current (4.6A to 3.7A range) and maximum operating temperature (150°C to 175°C). Selection depends on availability, supply chain preference, and thermal design requirements.

Q: Why is SA70A listed as a substitute if it uses a different package?

A: SA70A is manufacturer-recommended as an alternative when design constraints permit package change. It provides superior electrical performance: 4.6A peak pulse current (versus 3.6A) and 500W power dissipation (versus 400W). The DO-204AC (DO-15) package requires PCB layout modification but offers enhanced protection margin for high-stress applications.

Q: Are all substitute parts RoHS compliant?

A: All listed substitutes maintain ROHS3 compliance. Moisture sensitivity level is MSL 1 (unlimited) for all parts except those where MSL data was not provided in manufacturer specifications.

Q: Can P4KE82A-G be used in applications requiring 175°C operation?

A: P4KE82A-G is rated to maximum 150°C junction temperature, 25°C lower than other variants. Use in applications with maximum operating temperature above 150°C requires thermal analysis to confirm junction temperature remains within specification. Alternative variants rated to 175°C are recommended for high-temperature designs.

Q: What is the difference between P4KE82A-AP, P4KE82A-BP, and P4KE82A-TP?

A: All three are Micro Commercial Co variants with identical electrical specifications: 70.1V reverse standoff, 113V clamping, 3.6A peak pulse current, and 400W power dissipation. Designations (-AP, -BP, -TP) represent different manufacturing or packaging batches. Selection is based on supplier availability and inventory status.