P4KE15CA-B Equivalent & Substitute Parts

Part Overview

The P4KE15CA-B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component operates across a wide temperature range of -55°C to 175°C and is RoHS3 compliant. The part is currently active in production with 667 units in stock.

Substitute parts are necessary when the original manufacturer's stock is unavailable, when alternative packaging formats are required, or when higher power dissipation capabilities are needed for specific circuit designs while maintaining electrical compatibility.

Substiute Parts

P4KE15CA-B

Littelfuse Inc.In Stock: 777P4KE15CA-B Datasheet

Current PartRFQ

1.5KE15CA

Taiwan Semiconductor CorporationIn Stock: 352261.5KE15CA Datasheet

MFR RecommendedRFQ

P4KE15CA

Taiwan Semiconductor CorporationIn Stock: 949P4KE15CA Datasheet

MFR RecommendedRFQ

P6KE15CA

Fairchild SemiconductorIn Stock: 53432P6KE15CA Datasheet

MFR RecommendedRFQ

P6KE16CA

Fairchild SemiconductorIn Stock: 25288P6KE16CA Datasheet

MFR RecommendedRFQ

SA12CA

Fairchild SemiconductorIn Stock: 6471SA12CA Datasheet

MFR RecommendedRFQ

P6KE15CA

Fairchild SemiconductorIn Stock: 53432P6KE15CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE15CA-B is determined by the following critical electrical parameters:

• Voltage - Reverse Standoff (Typ): 12.8V
• Voltage - Breakdown (Min): 14.3V
• Voltage - Clamping (Max) @ Ipp: 21.2V
• Bidirectional operation with single channel
• Through-hole axial mounting configuration
• General-purpose application classification

Substitute parts must maintain identical or compatible voltage specifications to ensure proper circuit protection without altering system behavior. Current and power ratings may vary based on application requirements, provided the clamping voltage remains within acceptable tolerance. Package variations (DO-204AL, DO-201, DO-204AC) are acceptable as they maintain the same electrical performance and through-hole mounting compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: P4KE15CA (Taiwan Semiconductor Corporation)

The P4KE15CA from Taiwan Semiconductor Corporation is the most direct substitute for the P4KE15CA-B. This part maintains identical voltage specifications (12.8V reverse standoff, 21.2V clamping), equivalent current rating (20A vs. 19.3A), and matching power dissipation (400W). Both parts are RoHS3 compliant, active in production, and available in DO-204AL (DO-41) through-hole packaging. The only difference is packaging format (Tape & Reel vs. Bulk), which does not affect electrical performance.

Secondary Substitute: P6KE15CA (Fairchild Semiconductor)

The P6KE15CA provides identical voltage characteristics (12.8V reverse standoff, 21.2V clamping) with enhanced current handling (29A) and higher power dissipation (600W). This part is suitable for applications requiring greater transient energy absorption. The package differs (DO-204AC, DO-15 vs. DO-204AL, DO-41), but both are through-hole axial configurations. Operating temperature range is slightly reduced (-50°C to 175°C vs. -55°C to 175°C).

Higher Power Alternative: 1.5KE15CA (Taiwan Semiconductor Corporation)

The 1.5KE15CA maintains identical voltage specifications with significantly higher current capacity (74A) and power dissipation (1500W). This part is appropriate for high-energy transient protection applications. The package format differs (DO-201AA, DO-27), requiring PCB layout verification. Both parts are RoHS3 compliant and active in production.

Not Recommended: SA12CA (Fairchild Semiconductor)

The SA12CA is obsolete and exhibits voltage parameter deviations (12V reverse standoff vs. 12.8V, 19.9V clamping vs. 21.2V). While functionally similar, the obsolete status and voltage variance make this part unsuitable for new designs.

Insufficient Data: P6KE16CA (Fairchild Semiconductor)

The P6KE16CA lacks complete electrical parameter specifications in the provided data. This part cannot be reliably evaluated for substitution without full technical documentation.

Frequently Asked Questions (FAQ)

Q: Can I use the 1.5KE15CA as a direct replacement for the P4KE15CA-B?

A: The 1.5KE15CA is electrically compatible, maintaining identical voltage specifications (12.8V reverse standoff, 21.2V clamping). However, the package differs (DO-201AA, DO-27 vs. DO-204AL, DO-41). PCB layout and footprint verification is required before substitution. The higher current and power ratings (74A, 1500W) provide additional protection margin.

Q: What is the difference between the P4KE15CA and P6KE15CA?

A: Both parts maintain identical voltage specifications (12.8V reverse standoff, 21.2V clamping). The P6KE15CA provides higher current capacity (29A vs. 19.3A) and power dissipation (600W vs. 400W). The package differs (DO-204AC, DO-15 vs. DO-204AL, DO-41). Select the P6KE15CA for applications requiring greater transient energy absorption.

Q: Is the SA12CA a suitable substitute?

A: No. The SA12CA is obsolete and exhibits voltage parameter deviations (12V reverse standoff vs. 12.8V, 19.9V clamping vs. 21.2V). These differences may compromise circuit protection performance. Use active, in-production alternatives instead.

Q: Do package differences affect electrical performance?

A: No. DO-204AL (DO-41), DO-201AA (DO-27), and DO-204AC (DO-15) are all through-hole axial packages with identical electrical characteristics. Package selection depends on PCB footprint compatibility and available board space. Verify footprint dimensions before substitution.

Q: Which substitute offers the best compatibility?

A: The P4KE15CA from Taiwan Semiconductor Corporation provides the best compatibility, maintaining identical electrical specifications and power rating (400W) with only packaging format differences (Tape & Reel vs. Bulk). This part is recommended for direct replacement applications.

Q: Can I use a substitute with higher current or power ratings?

A: Yes. Substitutes with higher current (29A, 74A) and power ratings (600W, 1500W) provide additional protection margin and are electrically compatible. Verify that the application circuit can accommodate the different package format if applicable.

Q: What compliance certifications should I verify?

A: Confirm RoHS3 compliance for all substitute parts. The P4KE15CA (TSC), 1.5KE15CA, and SA12CA are RoHS3 compliant. Compliance information for P6KE15CA and P6KE16CA is not provided in the available data; verify with the manufacturer before use.