P4KE22C-B Equivalent & Substitute Parts

Part Overview

The P4KE22C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This bidirectional Zener diode operates in the DO-204AL (DO-41) through-hole package with a reverse standoff voltage of 18.8V and peak pulse power rating of 400W. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued circuit protection functionality.

Substiute Parts

P4KE22C-B

Littelfuse Inc.In Stock: 868P4KE22C-B Datasheet

Current PartRFQ

P4KE22CA

Taiwan Semiconductor CorporationIn Stock: 10488P4KE22CA Datasheet

DirectRFQ

P4KE22CA-B

Littelfuse Inc.In Stock: 1071P4KE22CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P4KE22C-B is determined by strict electrical and mechanical compatibility within the P4KE series. The following criteria establish valid substitutes:

• Identical reverse standoff voltage: 18.8V (Typ)
• Identical package and mounting type: DO-204AL (DO-41) through-hole axial
• Identical bidirectional channel configuration: 1 channel
• Identical operating temperature range: -55°C ~ 175°C (TJ)
• Identical base product number: P4KE22
• Identical power rating: 400W peak pulse
• Voltage clamping and peak pulse current within acceptable operational parameters for the P4KE22 series

The identified substitutes P4KE22CA and P4KE22CA-B meet all mechanical and primary electrical criteria, with minor variations in clamping voltage and peak pulse current that remain within the P4KE22 series specifications.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE22CA and P4KE22CA-B are active product alternatives to the obsolete P4KE22C-B. Selection between these substitutes is based on product availability, packaging requirements, and manufacturer preference:

P4KE22CA (Taiwan Semiconductor Corporation) is available in Tape & Reel packaging with 10,400 units in stock and maintains ROHS3 compliance with REACH Unaffected status.

P4KE22CA-B (Littelfuse Inc.) is available in Bulk packaging with 1,042 units in stock and maintains ROHS3 compliance with REACH Unaffected status. This option preserves the original manufacturer lineage.

Both parts maintain identical mechanical compatibility and core electrical specifications (reverse standoff voltage, operating temperature, power rating, and package type). The clamping voltage differential (30.6V versus 32.13V) and peak pulse current variation (13.7A versus 13.4A) remain within P4KE22 series operational parameters.

Frequently Asked Questions (FAQ)

Q: Can P4KE22CA or P4KE22CA-B be used as direct replacements for P4KE22C-B?

A: Yes. Both parts share identical reverse standoff voltage (18.8V), package type (DO-204AL through-hole), operating temperature range (-55°C to 175°C), and power rating (400W). They are mechanically and electrically compatible for the same circuit applications.

Q: What is the difference between P4KE22CA and P4KE22CA-B?

A: The primary differences are manufacturer (Taiwan Semiconductor Corporation versus Littelfuse Inc.), packaging format (Tape & Reel versus Bulk), and inventory availability. Electrical specifications and package type are identical.

Q: Does the clamping voltage difference (32.13V vs. 30.6V) affect compatibility?

A: The clamping voltage variation falls within the P4KE22 series design parameters. Both values provide appropriate transient suppression for the 18.8V standoff voltage class. Circuit-specific requirements should determine acceptability.

Q: Are both substitutes RoHS compliant?

A: Yes. Both P4KE22CA and P4KE22CA-B are ROHS3 compliant and suitable for applications requiring RoHS certification.

Q: What packaging options are available for these substitutes?

A: P4KE22CA is supplied in Tape & Reel (TR) format for automated assembly. P4KE22CA-B is supplied in Bulk format for manual assembly or lower-volume applications.