P6KE22ARL Equivalent & Substitute Parts

Part Overview

The P6KE22ARL is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in through-hole axial configurations. This component features an 18.8V reverse standoff voltage with a 30.6V maximum clamping voltage and 20A peak pulse current capability. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	18.8V
Voltage - Breakdown (Min)	20.9V
Voltage - Clamping (Max) @ Ipp	30.6V
Current - Peak Pulse (10/1000µs)	20A (8/20µs)
Power - Peak Pulse	600W
Type	Zener
Unidirectional Channels	1
Mounting Type	Through Hole
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	T-18, Axial

Substitute Part Grouping Explanation

Substitute parts for the P6KE22ARL are classified based on strict electrical and mechanical parameter alignment:

Direct Electrical Equivalents maintain identical voltage specifications (18.8V standoff, 20.9V breakdown minimum, 30.6V clamping maximum) and peak pulse current ratings (20A nominal). These parts differ primarily in package configuration or manufacturer designation but preserve the core protection characteristics.

Similar Electrical Equivalents maintain the same voltage parameters but differ in peak pulse current capability (51A versus 20A) or power dissipation (1500W versus 600W). These parts provide enhanced protection margins and are suitable where mechanical constraints permit package substitution.

Key Parameters Determining Substitution:

Voltage - Reverse Standoff: 18.8V (required match)
Voltage - Clamping (Max) @ Ipp: 30.6V (required match)
Current - Peak Pulse: 20A minimum (direct equivalents) or higher (similar equivalents)
Mounting Type: Through Hole (required match)
Package compatibility: Axial or DO-15/DO-204AC configurations

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status
P6KE22ARL	onsemi	18.8V	30.6V	20A (8/20µs)	600W	T-18, Axial	-55°C ~ 150°C	Obsolete
P6KE22A	Fairchild Semiconductor	18.8V	30.6V	20A	600W	DO-204AC, DO-15, Axial	-50°C ~ 175°C	Active
P6KE22AE3/TR13	Microsemi Corporation	18.8V	30.6V	20A	600W	T-18, Axial	-65°C ~ 150°C	Active
1.5KE22A	Taiwan Semiconductor Corporation	18.8V	30.6V	51A	1500W	DO-201AA, DO-27, Axial	-55°C ~ 175°C	Active
P6KE22A-B	Littelfuse Inc.	18.8V	30.6V	19.9A	600W	DO-204AC, DO-15, Axial	-55°C ~ 175°C	Active
TP6KE22A	Littelfuse Inc.	18.8V	30.6V	19.9A	600W	DO-204AC, DO-15, Axial	-55°C ~ 175°C	Active

Engineering Selection Recommendations

P6KE22AE3/TR13 (Microsemi Corporation) is the primary direct substitute for P6KE22ARL. This part maintains identical electrical specifications and axial package configuration while offering active product status and ROHS3 compliance. The extended lower operating temperature range (-65°C versus -55°C) provides additional thermal margin.

P6KE22A (Fairchild Semiconductor) serves as an alternative direct electrical equivalent with active status. The DO-204AC (DO-15) package differs from the original axial configuration but maintains identical electrical performance. The extended upper operating temperature range (-50°C to 175°C) accommodates higher ambient conditions.

P6KE22A-B (Littelfuse Inc.) and TP6KE22A (Littelfuse Inc.) provide direct electrical equivalents with ROHS3 compliance and active product status. TP6KE22A includes AEC-Q101 automotive qualification. Both use DO-204AC (DO-15) package configurations. Peak pulse current specification of 19.9A is functionally equivalent to the 20A rating.

1.5KE22A (Taiwan Semiconductor Corporation) represents a similar electrical equivalent with enhanced current and power ratings (51A peak pulse, 1500W power dissipation). This part is suitable only where mechanical package constraints permit DO-201AA or DO-27 configuration substitution and where the higher current capability does not introduce design complications.

Frequently Asked Questions (FAQ)

Q: Can P6KE22A replace P6KE22ARL in axial package applications? A: P6KE22A provides identical electrical specifications but uses DO-204AC (DO-15) package. Direct mechanical substitution in axial-only footprints is not possible without board redesign. P6KE22AE3/TR13 maintains the axial package configuration.

Q: What is the difference between P6KE22A-B and TP6KE22A? A: Both parts are manufactured by Littelfuse Inc. with identical electrical specifications and DO-204AC packaging. TP6KE22A includes AEC-Q101 automotive qualification and is supplied in cut tape format, while P6KE22A-B is supplied in bulk packaging.

Q: Is 1.5KE22A a direct substitute for P6KE22ARL? A: 1.5KE22A maintains identical voltage specifications but differs in package (DO-201AA/DO-27 versus axial), peak pulse current (51A versus 20A), and power dissipation (1500W versus 600W). Substitution requires mechanical redesign and circuit validation to ensure the higher current rating does not introduce unintended protection behavior.

Q: What compliance certifications are available for substitute parts? A: P6KE22AE3/TR13, P6KE22A-B, and TP6KE22A are ROHS3 compliant. TP6KE22A additionally carries AEC-Q101 automotive qualification. All parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: Can I use substitute parts with different operating temperature ranges? A: Substitute parts with extended temperature ranges (such as P6KE22A at -50°C to 175°C) are compatible with applications designed for the original -55°C to 150°C range. Applications requiring the full -55°C lower limit should use P6KE22AE3/TR13 or 1.5KE22A.

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