P4KE15C-B Equivalent & Substitute Parts

Part Overview

The P4KE15C-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 12.8V reverse standoff voltage and 22.26V maximum clamping voltage. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

P4KE15C-B

Littelfuse Inc.In Stock: 1022P4KE15C-B Datasheet

Current PartRFQ

P4KE15CA

Taiwan Semiconductor CorporationIn Stock: 949P4KE15CA Datasheet

DirectRFQ

P4KE15CA-B

Littelfuse Inc.In Stock: 777P4KE15CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE15C-B is determined by strict alignment of the following electrical and mechanical parameters:

• Reverse standoff voltage: 12.8V (typ)
• Package type: DO-204AL (DO-41) through-hole axial configuration
• Bidirectional channel count: 1
• Operating temperature range: -55°C to 175°C minimum
• RoHS3 compliance requirement
• Peak pulse power rating: 400W minimum

The identified substitute parts maintain these core parameters while allowing minor variations in clamping voltage (within the 21.2V to 22.26V range) and peak pulse current (19.3A to 20A), which remain within acceptable tolerance for general-purpose transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE15CA-B and P4KE15CA are active-status alternatives to the obsolete P4KE15C-B. Selection between these substitutes is based on the following criteria:

P4KE15CA-B (Littelfuse Inc., Bulk Packaging): Maintains identical peak pulse current specification (19.3A) to the original part and is supplied by the original manufacturer. This option provides maximum design continuity for applications where the original Littelfuse sourcing is preferred. RoHS3 compliance and REACH unaffected status are confirmed.

P4KE15CA (Taiwan Semiconductor Corporation, Tape & Reel Packaging): Offers active product status with slightly elevated peak pulse current (20A) and is supplied in tape and reel format suitable for automated assembly processes. RoHS3 compliance and REACH unaffected status are confirmed. This option is appropriate for high-volume production environments.

Both substitutes operate within the same temperature range and maintain the required 400W peak pulse power rating and DO-204AL package specification. The clamping voltage differential (21.2V versus 22.26V) represents a 4.7% reduction and remains within acceptable tolerance for general-purpose transient suppression.

Frequently Asked Questions (FAQ)

Q: Can P4KE15CA-B or P4KE15CA be used as direct replacements for P4KE15C-B in existing designs?

A: Yes. Both parts maintain the critical electrical parameters: 12.8V reverse standoff voltage, 400W peak pulse power, -55°C to 175°C operating range, and DO-204AL through-hole package configuration. The clamping voltage reduction from 22.26V to 21.2V and peak pulse current variation (19.3A to 20A) are within acceptable substitution tolerance for general-purpose applications.

Q: What is the primary reason for substituting the P4KE15C-B?

A: The P4KE15C-B is classified as obsolete. P4KE15CA-B and P4KE15CA are active products with confirmed ongoing availability, ensuring long-term supply chain reliability.

Q: Are there packaging differences between the substitute options?

A: Yes. P4KE15CA-B is supplied in bulk packaging, while P4KE15CA is supplied in tape and reel (TR) format. Bulk packaging is suitable for manual assembly and low-volume applications, while tape and reel format is optimized for automated pick-and-place assembly in production environments.

Q: Do both substitutes meet RoHS3 compliance requirements?

A: Yes. Both P4KE15CA-B and P4KE15CA are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the difference in clamping voltage between the original and substitute parts?

A: The P4KE15C-B specifies a maximum clamping voltage of 22.26V, while both substitutes specify 21.2V. This 1.06V reduction represents a 4.7% difference and is within acceptable tolerance for transient voltage suppression in general-purpose applications where the primary function is overvoltage protection.

Q: Which substitute should be selected for new designs?

A: Selection depends on manufacturing process requirements. For automated assembly environments, P4KE15CA (tape and reel) is appropriate. For manual assembly or lower-volume production, P4KE15CA-B (bulk) is suitable. Both are active products with equivalent electrical performance.