P6KE39C-B Equivalent & Substitute Parts

Part Overview

The P6KE39C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This component features a 33.3V reverse standoff voltage with a 56.6V maximum clamping voltage and 600W peak pulse power rating in a through-hole DO-204AC (DO-15) axial package. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

P6KE39C-B

Littelfuse Inc.In Stock: 897P6KE39C-B Datasheet

Current PartRFQ

P6KE39CA

Fairchild SemiconductorIn Stock: 27147P6KE39CA Datasheet

DirectRFQ

P6KE39CA-B

Littelfuse Inc.In Stock: 1207P6KE39CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6KE39C-B is determined by the following critical parameters that must remain consistent across equivalent components:

• Voltage - Reverse Standoff (Typ): 33.3V
• Voltage - Clamping (Max) @ Ipp: Must not exceed 56.6V to maintain circuit protection integrity
• Power - Peak Pulse: 600W minimum
• Package / Case: DO-204AC (DO-15) axial through-hole configuration
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Bidirectional Channels: 1
• RoHS Compliance: ROHS3 Compliant

The identified substitute parts maintain these core electrical and mechanical specifications, ensuring functional equivalence in transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete P6KE39C-B, the P6KE39CA-B represents the primary substitute option. This part is manufactured by Littelfuse Inc., the original equipment manufacturer, and maintains active product status. It provides identical reverse standoff voltage (33.3V), equivalent power rating (600W), matching package configuration (DO-204AC/DO-15 axial), and identical operating temperature range (-55°C ~ 175°C). The clamping voltage is 53.9V, which is lower than the original 56.6V specification, providing enhanced protection margins. Both parts are ROHS3 compliant and carry identical ECCN and HTSUS classifications.

The P6KE39CA from Fairchild Semiconductor is listed as an alternative substitute with active product status. However, complete electrical parameter specifications are not provided in the available data, limiting full equivalence verification.

For new designs or system replacements, P6KE39CA-B is the recommended selection based on manufacturer continuity, complete specification alignment, and active product availability.

Frequently Asked Questions (FAQ)

Q: Why is the P6KE39C-B classified as obsolete? A: The P6KE39C-B has reached end-of-life status with Littelfuse Inc. The P6KE39CA-B serves as the active replacement within the same P6KE series, offering equivalent functionality with improved specifications.

Q: Can P6KE39CA-B be used as a direct replacement for P6KE39C-B? A: Yes. Both parts share identical reverse standoff voltage (33.3V), power rating (600W), operating temperature range (-55°C ~ 175°C), and DO-204AC axial package configuration. The lower clamping voltage (53.9V vs. 56.6V) provides tighter voltage regulation, which is compatible with most applications designed for the original part.

Q: What is the difference between P6KE39CA and P6KE39CA-B? A: P6KE39CA-B is manufactured by Littelfuse Inc. with active product status and complete electrical specifications. P6KE39CA is manufactured by Fairchild Semiconductor. The "-B" suffix typically indicates a specific packaging or lead configuration variant. Complete parameter data for the Fairchild version is not available for full comparison.

Q: Are there any compliance or certification differences between the substitute parts? A: Both P6KE39C-B and P6KE39CA-B are ROHS3 compliant with identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. Moisture sensitivity level is 1 (Unlimited) for both parts, indicating no special handling requirements.

Q: What packaging options are available for these TVS diodes? A: All listed parts use through-hole mounting in the DO-204AC (DO-15) axial package configuration, suitable for PCB insertion and wave soldering processes.

Q: How do I verify compatibility in my specific application? A: Confirm that your circuit design operates within the 33.3V reverse standoff voltage specification and can tolerate the maximum clamping voltage of the selected substitute. Verify that the through-hole axial package is compatible with your PCB layout and assembly process.