P4KE22 Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The P4KE22 is a unidirectional transient voltage suppressor (TVS) diode in DO-204AL (DO-41) axial package, rated for 18.8V reverse standoff voltage with 400W peak pulse power handling. Designed for general-purpose transient protection applications, this component operates across -55°C to 175°C junction temperature range.

The original P4KE22 manufactured by Littelfuse Inc. is currently obsolete. Equivalent and substitute parts from active manufacturers are available to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

P4KE22

Littelfuse Inc.In Stock: 985P4KE22 Datasheet

Current PartRFQ

P4KE22A

Taiwan Semiconductor CorporationIn Stock: 5754P4KE22A Datasheet

DirectRFQ

P4KE22A-AP

Micro Commercial CoIn Stock: 1165P4KE22A-AP Datasheet

MFR RecommendedRFQ

P4KE22A-BP

Micro Commercial CoIn Stock: 985P4KE22A-BP Datasheet

MFR RecommendedRFQ

P4KE22A-G

Comchip TechnologyIn Stock: 839P4KE22A-G Datasheet

MFR RecommendedRFQ

P4KE22A-TP

Micro Commercial CoIn Stock: 929P4KE22A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of P4KE22 is determined by the following critical parameters that must remain constant across all equivalent parts:

• Voltage - Reverse Standoff (Typ): 18.8V
• Unidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial
• Power - Peak Pulse: 400W
• Type: Zener

Acceptable variation ranges within electrical performance:

• Voltage - Breakdown (Min): 19.8V to 20.9V
• Voltage - Clamping (Max) @ Ipp: 30.6V to 32.13V
• Current - Peak Pulse (10/1000µs): 13.07A to 13.7A
• Operating Temperature Range: -55°C minimum to 150°C or 175°C maximum

All substitute parts listed maintain identical mechanical compatibility and core electrical characteristics required for direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are manufactured by active component suppliers with confirmed product status and current production availability. Selection among equivalent parts should be based on the following criteria:

P4KE22A (Taiwan Semiconductor Corporation) offers the highest inventory availability (5710 units) and maintains full ROHS3 compliance with -55°C to 175°C operating range. This part is suitable for applications requiring maximum supply assurance.

P4KE22A-AP, P4KE22A-BP, and P4KE22A-TP (Micro Commercial Co) are functionally equivalent with identical electrical specifications and -55°C to 175°C operating range. These variants differ only in packaging designation (AP, BP, TP suffixes) and represent alternative sourcing options with moderate inventory levels (897-1142 units).

P4KE22A-G (Comchip Technology) maintains full electrical compatibility with one exception: operating temperature maximum is limited to 150°C versus 175°C for other substitutes. This part is suitable for applications with maximum junction temperature requirements not exceeding 150°C. ROHS3 compliance is confirmed.

All substitute parts maintain identical mechanical compatibility with the original P4KE22 package specification (DO-204AL, DO-41, Axial through-hole configuration) and are suitable for direct PCB replacement without design modification.

Frequently Asked Questions (FAQ)

Q: Can P4KE22A substitute directly for the obsolete P4KE22?

A: Yes. P4KE22A from Taiwan Semiconductor Corporation is a direct functional equivalent. Both parts share identical reverse standoff voltage (18.8V), package configuration (DO-204AL/DO-41 axial), power rating (400W), and operating temperature range (-55°C to 175°C). Voltage clamping performance differs slightly (30.6V versus 32.13V), which remains within acceptable substitution parameters for general-purpose transient protection applications.

Q: What is the difference between P4KE22A-AP, P4KE22A-BP, and P4KE22A-TP?

A: These are all manufactured by Micro Commercial Co and share identical electrical specifications. The suffix designations (AP, BP, TP) indicate different packaging or distribution formats. All three maintain the same core performance characteristics and are mechanically compatible with the original P4KE22 footprint.

Q: Is P4KE22A-G suitable for all applications requiring P4KE22?

A: P4KE22A-G is suitable for applications where maximum junction temperature does not exceed 150°C. The original P4KE22 and most substitute parts are rated to 175°C. If your application requires operation at junction temperatures between 150°C and 175°C, select P4KE22A, P4KE22A-AP, P4KE22A-BP, or P4KE22A-TP instead.

Q: Are all substitute parts RoHS compliant?

A: P4KE22A (Taiwan Semiconductor) and P4KE22A-G (Comchip) are confirmed ROHS3 compliant. RoHS status for P4KE22A-AP, P4KE22A-BP, and P4KE22A-TP is not specified in available documentation. Verify RoHS compliance requirements with your procurement department before final part selection.

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

A: Yes. All substitute parts share identical DO-204AL/DO-41 axial package configuration and through-hole mounting specifications. No PCB layout or footprint modifications are required for substitution.

Q: Which substitute part offers the best supply availability?

A: P4KE22A from Taiwan Semiconductor Corporation currently has the highest inventory level at 5710 units, providing maximum supply assurance for production requirements.