P4KE11C Equivalent & Substitute Parts

Part Overview

The P4KE11C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in through-hole applications. The device features a reverse standoff voltage of 9.4V and peak pulse power rating of 400W in a DO-204AL (DO-41) axial package. This part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.

Substiute Parts

P4KE11C

Littelfuse Inc.In Stock: 783P4KE11C Datasheet

Current PartRFQ

P4KE11CA

Taiwan Semiconductor CorporationIn Stock: 940P4KE11CA Datasheet

DirectRFQ

P6KE11CA

Taiwan Semiconductor CorporationIn Stock: 8118P6KE11CA Datasheet

MFR RecommendedRFQ

P4KE11CA-G

Comchip TechnologyIn Stock: 1010P4KE11CA-G Datasheet

MFR RecommendedRFQ

P6KE11CA-TP

Micro Commercial CoIn Stock: 769P6KE11CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE11C is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 9.4V (must match)
• Voltage - Clamping (Max) @ Ipp: 15.6V or 16.38V (acceptable range for overvoltage protection)
• Current - Peak Pulse (10/1000µs): 25.64A to 38A (acceptable range)
• Power - Peak Pulse: 400W or 600W (equal or greater)
• Type: Zener (must match)
• Bidirectional Channels: 1 (must match)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole (must match)
• Package / Case: DO-204AL (DO-41) or DO-204AC (DO-15) (compatible axial packages)

Compliance Criteria:

• RoHS Status: ROHS3 Compliant (required)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (required)

All substitute parts listed maintain the same reverse standoff voltage (9.4V) and operate within acceptable clamping voltage and peak pulse current ranges for direct substitution in P4KE11C applications.

Parameter Comparison

Engineering Selection Recommendations

P4KE11CA (Taiwan Semiconductor Corporation): Active product status with identical reverse standoff voltage (9.4V), matching operating temperature range (-55°C ~ 175°C), and equivalent power rating (400W). Maintains DO-204AL (DO-41) package compatibility. ROHS3 compliant with MSL 1 rating. Clamping voltage of 15.6V is lower than the original 16.38V, providing tighter overvoltage protection. Peak pulse current of 27A is comparable to the original 26.3A.

P6KE11CA (Taiwan Semiconductor Corporation): Active product with identical reverse standoff voltage (9.4V) and lower clamping voltage (15.6V). Offers higher peak pulse current (38A) and increased power rating (600W), providing enhanced transient protection capability. Package transition from DO-204AL (DO-41) to DO-204AC (DO-15) requires PCB layout verification. ROHS3 compliant with MSL 1 rating. Operating temperature range not specified in available data.

P4KE11CA-G (Comchip Technology): Active product with identical reverse standoff voltage (9.4V) and matching DO-204AL (DO-41) package. Peak pulse current (25.64A) and power rating (400W) are equivalent to the original. Operating temperature range limited to -55°C ~ 150°C, which is 25°C lower than the original specification. ROHS3 compliant with MSL 1 rating.

P6KE11CA-TP (Micro Commercial Co): Active product with identical reverse standoff voltage (9.4V) and enhanced specifications including 38A peak pulse current and 600W power rating. Maintains operating temperature range of -55°C ~ 175°C. Package transition from DO-204AL (DO-41) to DO-204AC (DO-15) requires PCB layout verification. MSL 1 rating confirmed. RoHS status not specified in available data.

Frequently Asked Questions (FAQ)

Q: Can I use P6KE11CA or P6KE11CA-TP as direct replacements for P4KE11C?

A: Both P6KE11CA and P6KE11CA-TP are electrically compatible substitutes with identical reverse standoff voltage (9.4V) and superior power handling (600W vs. 400W). However, they use DO-15 package instead of DO-41, requiring PCB footprint modification. Verify board layout compatibility before implementation.

Q: What is the difference between P4KE11CA and P4KE11CA-G?

A: Both maintain identical reverse standoff voltage (9.4V), peak pulse current (25.64A to 27A), and power rating (400W). P4KE11CA-G has a reduced operating temperature range (-55°C ~ 150°C vs. -55°C ~ 175°C). Select P4KE11CA for applications requiring full temperature range operation.

Q: Why is the clamping voltage lower in substitute parts?

A: Substitute parts (P4KE11CA, P6KE11CA, P4KE11CA-G, P6KE11CA-TP) all feature 15.6V clamping voltage compared to the original 16.38V. This represents tighter overvoltage protection and is acceptable for general-purpose TVS applications. Verify circuit requirements do not mandate the original clamping specification.

Q: Are all substitute parts RoHS3 compliant?

A: P4KE11CA, P6KE11CA, and P4KE11CA-G are confirmed ROHS3 compliant. P6KE11CA-TP RoHS status is not specified in available documentation. Confirm compliance requirements with your procurement or quality department.

Q: What packaging options are available?

A: P4KE11CA and P4KE11CA-G maintain DO-204AL (DO-41) axial package compatibility with the original P4KE11C. P6KE11CA and P6KE11CA-TP use DO-204AC (DO-15) axial package, requiring PCB footprint adjustment. Verify board layout and component placement before selecting DO-15 variants.

Q: Which substitute offers the best performance upgrade?

A: P6KE11CA and P6KE11CA-TP both provide 38A peak pulse current and 600W power rating, representing a 50% increase in power handling compared to the original 400W specification. These are recommended for applications requiring enhanced transient protection. Package change to DO-15 must be accommodated in PCB design.