P4KE39CA-B Equivalent & Substitute Parts

Part Overview

The P4KE39CA-B is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection applications. This bidirectional zener diode operates in the DO-204AL (DO-41) axial through-hole package and provides 53.9V clamping voltage with 7.6A peak pulse current capability. The component is ROHS3 compliant and maintains full operational status in the market. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory availability, packaging format preferences, or supply chain considerations.

Substiute Parts

P4KE39CA-B

Littelfuse Inc.In Stock: 739P4KE39CA-B Datasheet

Current PartRFQ

P4KE39CA

Taiwan Semiconductor CorporationIn Stock: 60240P4KE39CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE39CA-B are qualified based on the following critical parameters that determine functional equivalence:

• Voltage - Reverse Standoff (Typ): 33.3V
• Voltage - Clamping (Max) @ Ipp: 53.9V
• Current - Peak Pulse (10/1000µs): 7.6A minimum
• Package / Case: DO-204AL (DO-41) axial through-hole
• Operating Temperature Range: -55°C to 175°C (TJ)
• RoHS Status: ROHS3 Compliant

The P4KE39CA manufactured by Taiwan Semiconductor Corporation qualifies as a direct substitute. This part maintains identical voltage specifications, equivalent peak pulse current performance, identical package configuration, and matching compliance certifications. The primary distinction is packaging format (Tape & Reel versus Bulk) and manufacturer origin.

Parameter Comparison

Engineering Selection Recommendations

The P4KE39CA manufactured by Taiwan Semiconductor Corporation is a qualified substitute for the P4KE39CA-B. Both components maintain active product status and full ROHS3 compliance. The substitute part delivers equivalent electrical performance across all critical voltage and current parameters within the specified operating temperature range.

Selection between the original and substitute part should be based on:

• Packaging requirements: Bulk format versus Tape & Reel (TR) format
• Inventory availability and lead time
• Supply chain sourcing preferences
• Manufacturing process compatibility with packaging format

The 0.1A increase in peak pulse current (7.7A versus 7.6A) in the substitute part provides additional margin and does not compromise circuit compatibility.

Frequently Asked Questions (FAQ)

Q: Can the P4KE39CA (Taiwan Semiconductor) be used as a direct replacement for the P4KE39CA-B (Littelfuse)?

A: Yes. Both parts share identical voltage specifications (33.3V standoff, 53.9V clamping), equivalent peak pulse current ratings, identical package configuration (DO-204AL through-hole), and matching ROHS3 compliance. The primary difference is packaging format and manufacturer.

Q: What is the difference between Bulk and Tape & Reel packaging?

A: Bulk packaging supplies components loose in containers, suitable for manual assembly or small-volume applications. Tape & Reel (TR) packaging supplies components on continuous tape in reels, optimized for automated pick-and-place assembly equipment. Both formats contain the same component; packaging selection depends on assembly process requirements.

Q: Are the voltage ratings identical between these parts?

A: Yes. Both the P4KE39CA-B and P4KE39CA maintain identical reverse standoff voltage (33.3V), breakdown voltage (37.1V minimum), and clamping voltage (53.9V maximum). These parameters determine circuit protection performance and are fully matched.

Q: Does the 0.1A difference in peak pulse current affect compatibility?

A: No. The substitute part's 7.7A peak pulse current exceeds the original specification of 7.6A, providing additional transient handling capability without introducing compatibility issues. This represents improved performance margin.

Q: Are both parts compliant with environmental and regulatory standards?

A: Yes. Both the P4KE39CA-B and P4KE39CA are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. Compliance status is equivalent.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. Both parts use identical DO-204AL (DO-41) axial through-hole package configuration with matching pin spacing and mechanical dimensions. PCB footprints and assembly processes require no modification.