P4KE20A-B Equivalent & Substitute Parts

Part Overview

The P4KE20A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component operates with a reverse standoff voltage of 17.1V and provides clamping at 27.7V maximum, with a peak pulse power rating of 400W. The part is Active in product status and fully RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics and compatible package configurations to support component sourcing flexibility and supply chain continuity.

Substiute Parts

P4KE20A-B

Littelfuse Inc.In Stock: 954P4KE20A-B Datasheet

Current PartRFQ

P4KE20A

Diotec SemiconductorIn Stock: 1176P4KE20A Datasheet

MFR RecommendedRFQ

P4KE20A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 817P4KE20A-E3/54 Datasheet

DirectRFQ

P4KE20A-TP

Micro Commercial CoIn Stock: 5831P4KE20A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE20A-B are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 17.1V
• Voltage - Clamping (Max) @ Ipp: 27.7V
• Current - Peak Pulse (10/1000µs): 14.4A to 15A
• Power - Peak Pulse: 400W
• Type: Zener, Unidirectional
• Mounting Type: Through Hole
• Package Compatibility: DO-204AL (DO-41) or DO-15 (DO-204AC)

All substitute parts maintain the same voltage protection characteristics and power dissipation capability. Peak pulse current values within the range of 14.4A to 15A are functionally equivalent for this application category. Package variants (DO-204AL and DO-15) are both axial through-hole configurations suitable for identical PCB footprints with standard lead spacing.

Parameter Comparison

Engineering Selection Recommendations

All four parts listed are Active in product status and suitable for direct substitution based on electrical parameter equivalence. Selection should be based on the following criteria:

RoHS3 Compliance Requirement: If RoHS3 compliance is mandatory for your application, select from P4KE20A-B (Littelfuse), P4KE20A-E3/54 (Vishay), or P4KE20A-TP (MCC). The P4KE20A (Diotec) carries "Not applicable" RoHS status and should be used only when RoHS compliance is not a design requirement.

Package Configuration: The P4KE20A (Diotec) uses DO-15 (DO-204AC) packaging, while the other three parts use DO-204AL (DO-41) packaging. Verify PCB footprint compatibility before selection. Both package types are axial through-hole configurations with standard lead spacing suitable for general-purpose applications.

Operating Temperature Range: The P4KE20A (Diotec) operates from -50°C to 175°C, while the other three parts operate from -55°C to 175°C. For applications requiring operation below -50°C, use P4KE20A-B, P4KE20A-E3/54, or P4KE20A-TP.

Peak Pulse Current Tolerance: Peak pulse current values range from 14.4A to 15A across all parts. All values fall within the functional equivalence range for this TVS diode category and do not affect substitution suitability.

Frequently Asked Questions (FAQ)

Q: Can I substitute P4KE20A-B with P4KE20A (Diotec) in a RoHS3-compliant design?

A: No. The P4KE20A (Diotec) carries "Not applicable" RoHS status. For RoHS3-compliant designs, use P4KE20A-B, P4KE20A-E3/54, or P4KE20A-TP, all of which are ROHS3 Compliant.

Q: What is the difference between DO-204AL and DO-15 packages?

A: Both are axial through-hole packages with standard lead spacing. DO-204AL (DO-41) and DO-15 (DO-204AC) are physically compatible with most PCB footprints designed for general-purpose TVS diodes. Verify your specific PCB layout before substitution.

Q: Are all substitute parts electrically equivalent to P4KE20A-B?

A: Yes. All substitute parts maintain identical voltage protection characteristics (17.1V standoff, 27.7V clamping) and 400W power dissipation. Peak pulse current values (14.4A to 15A) are functionally equivalent for this application category.

Q: Which substitute part has the widest operating temperature range?

A: P4KE20A-B, P4KE20A-E3/54, and P4KE20A-TP all operate from -55°C to 175°C. The P4KE20A (Diotec) operates from -50°C to 175°C, making it unsuitable for applications requiring operation below -50°C.

Q: Can I use these parts interchangeably on the same PCB?

A: Electrical substitution is direct. However, verify package compatibility with your PCB footprint. DO-204AL (DO-41) and DO-15 (DO-204AC) packages have different physical dimensions and lead configurations. Consult your PCB design documentation before making substitutions.