P4KE20 Equivalent & Substitute Parts

Part Overview

The P4KE20 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection in through-hole applications. This part operates with a reverse standoff voltage of 17.1V and provides 400W peak pulse power dissipation. The P4KE20 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain electrical and mechanical compatibility while offering active product status from alternative manufacturers.

Substiute Parts

P4KE20

Littelfuse Inc.In Stock: 808P4KE20 Datasheet

Current PartRFQ

P4KE20A

Diotec SemiconductorIn Stock: 1176P4KE20A Datasheet

DirectRFQ

P4KE20A-AP

Micro Commercial CoIn Stock: 684P4KE20A-AP Datasheet

MFR RecommendedRFQ

P4KE20A-BP

Micro Commercial CoIn Stock: 897P4KE20A-BP Datasheet

MFR RecommendedRFQ

P4KE20A-G

Comchip TechnologyIn Stock: 882P4KE20A-G Datasheet

MFR RecommendedRFQ

P4KE20A-TP

Micro Commercial CoIn Stock: 5831P4KE20A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE20 are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 17.1V (exact match required)
• Voltage - Breakdown (Min): 18V–19V (acceptable range)
• Voltage - Clamping (Max) @ Ipp: 27.7V–29.09V (acceptable range)
• Current - Peak Pulse (10/1000µs): 14.44A–15A (acceptable range)
• Power - Peak Pulse: 400W (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: DO-204AL, DO-41, or DO-15 (compatible axial packages)
• Type: Zener, Unidirectional (exact match required)

All substitute parts listed maintain compatibility within these electrical tolerances and mechanical specifications. Substitutes are sourced from active manufacturers including Diotec Semiconductor, Micro Commercial Co, and Comchip Technology.

Parameter Comparison

Engineering Selection Recommendations

P4KE20A (Diotec Semiconductor): Active product status with full electrical compatibility. Operating temperature range of -50°C to 175°C is suitable for most general-purpose applications. Package compatibility requires verification for DO-15 (DO-204AC) footprint differences.

P4KE20A-AP (Micro Commercial Co): Active product with bulk packaging. Maintains full operating temperature range (-55°C to 175°C) and REACH compliance. DO-41 package ensures direct mechanical compatibility with original P4KE20 through-hole footprint.

P4KE20A-BP (Micro Commercial Co): Active product with bulk packaging. Identical electrical and thermal specifications to P4KE20A-AP. Highest inventory availability (878 pcs) among substitute options. DO-41 package provides direct footprint compatibility.

P4KE20A-G (Comchip Technology): Active product with ROHS3 compliance matching the original P4KE20. Operating temperature range limited to -55°C to 150°C; verify suitability for applications requiring full 175°C operation. Peak pulse current specification (14.44A) is lowest among substitutes but remains within acceptable tolerance.

P4KE20A-TP (Micro Commercial Co): Active product supplied in cut tape packaging. Maintains full electrical specifications and operating temperature range (-55°C to 175°C). Highest inventory availability (5769 pcs). Ideal for automated assembly processes requiring tape-and-reel format.

Frequently Asked Questions (FAQ)

Q: Can P4KE20A (Diotec) be used as a direct replacement for P4KE20 (Littelfuse)?

A: P4KE20A maintains electrical compatibility within specified tolerances. Package compatibility requires attention: P4KE20A uses DO-15 (DO-204AC) while the original uses DO-41 (DO-204AL). Physical footprint verification is necessary before board-level substitution.

Q: What is the difference between P4KE20A-AP, P4KE20A-BP, and P4KE20A-TP?

A: All three are manufactured by Micro Commercial Co with identical electrical specifications. The differences are packaging format: -AP and -BP are supplied in bulk, while -TP is supplied in cut tape (CT) format suitable for automated pick-and-place assembly. All use DO-41 package.

Q: Is P4KE20A-G suitable for high-temperature applications?

A: P4KE20A-G has a maximum operating temperature of 150°C, compared to 175°C for other substitutes. Applications requiring operation above 150°C should use alternative substitutes with extended temperature ratings.

Q: Do all substitute parts have the same clamping voltage?

A: No. The original P4KE20 specifies 29.09V maximum clamping voltage, while all substitute parts specify 27.7V. This represents a lower clamping voltage, which may provide improved transient suppression in applications sensitive to clamping voltage variation.

Q: Are all substitute parts RoHS compliant?

A: RoHS compliance varies by manufacturer. P4KE20A-G and P4KE20A-TP are ROHS3 compliant. P4KE20A-AP and P4KE20A-BP are REACH Unaffected. P4KE20A (Diotec) has RoHS status listed as not applicable. Verify compliance requirements for your specific application and region.

Q: Which substitute offers the best inventory availability?

A: P4KE20A-TP (Micro Commercial Co) offers the highest inventory with 5769 pcs in stock. P4KE20A-BP provides 878 pcs, and P4KE20A-AP provides 668 pcs. Diotec P4KE20A has 1075 pcs available.