P4KE12C-B Equivalent & Substitute Parts

Part Overview

The P4KE12C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This bidirectional zener diode operates in the DO-204AL (DO-41) through-hole package with a reverse standoff voltage of 10.2V and peak pulse power rating of 400W. The product is currently classified as Obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and component procurement.

Substiute Parts

P4KE12C-B

Littelfuse Inc.In Stock: 1016P4KE12C-B Datasheet

Current PartRFQ

P4KE12CA

Taiwan Semiconductor CorporationIn Stock: 1111P4KE12CA Datasheet

DirectRFQ

P4KE12CA-B

Littelfuse Inc.In Stock: 953P4KE12CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE12C-B are qualified based on the following critical electrical and mechanical parameters:

• Reverse Standoff Voltage (Typ): 10.2V
• Bidirectional Channels: 1
• Package / Case: DO-204AL (DO-41), Axial
• Mounting Type: Through Hole
• Series Compatibility: P4KE base product number
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• RoHS3 Compliance

Substitute parts must maintain identical reverse standoff voltage, package configuration, and thermal operating range to ensure direct functional equivalence in circuit applications. Variations in clamping voltage and peak pulse current within the P4KE series are acceptable provided the standoff voltage and package remain constant.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE12CA-B and P4KE12CA are qualified substitutes for the obsolete P4KE12C-B based on matching electrical specifications and package configuration.

P4KE12CA-B (Littelfuse Inc., Active Status): This part maintains active product status with Littelfuse Inc., ensuring continued availability and manufacturing support. It is supplied in Bulk packaging and carries ROHS3 compliance with REACH Unaffected status. The identical reverse standoff voltage (10.2V), operating temperature range (-55°C ~ 175°C), and DO-204AL package make it a direct functional replacement.

P4KE12CA (Taiwan Semiconductor Corporation, Active Status): This alternative is supplied by Taiwan Semiconductor Corporation in Tape & Reel packaging, also maintaining active product status. It shares the same reverse standoff voltage, operating temperature range, and package configuration. The peak pulse current specification is 25A compared to 24.6A in the main part, representing a minor variation within acceptable substitution parameters.

For new designs and ongoing procurement, P4KE12CA-B is recommended as the primary substitute due to manufacturer continuity with the original Littelfuse source.

Frequently Asked Questions (FAQ)

Q: Can P4KE12CA-B and P4KE12CA be used interchangeably with P4KE12C-B?

A: Yes. Both parts maintain the critical electrical parameters that define substitution compatibility: 10.2V reverse standoff voltage, 1 bidirectional channel, DO-204AL (DO-41) through-hole package, and -55°C ~ 175°C operating temperature range. The differences in clamping voltage (16.7V vs. 17.54V) and peak pulse current (24.6A/25A vs. 24.6A) do not prevent functional equivalence in general-purpose transient voltage suppression applications.

Q: What is the significance of the Obsolete product status for P4KE12C-B?

A: Obsolete status indicates that Littelfuse Inc. has discontinued manufacturing and support for this part. Substitute parts with Active status ensure continued availability, manufacturing consistency, and technical support for new procurements and design revisions.

Q: Does packaging format affect electrical performance?

A: No. Bulk and Tape & Reel packaging formats do not affect the electrical characteristics or performance of the TVS diode. Packaging selection is determined by procurement volume, handling requirements, and assembly process compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both P4KE12CA-B and P4KE12CA are ROHS3 compliant, matching the compliance status of the original P4KE12C-B.

Q: Why does P4KE12CA show a slightly higher peak pulse current (25A vs. 24.6A)?

A: This minor variation falls within the acceptable tolerance range for the P4KE series and does not prevent functional substitution. The reverse standoff voltage, which is the primary parameter determining circuit protection characteristics, remains identical at 10.2V across all three parts.