P6KE43C Equivalent & Substitute Parts

Part Overview

The P6KE43C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This bidirectional zener diode operates in the DO-204AC (DO-15) axial package and provides 600W peak pulse power dissipation with a reverse standoff voltage of 36.8V. The part is currently listed as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

P6KE43C

Littelfuse Inc.In Stock: 1084P6KE43C Datasheet

Current PartRFQ

P6KE43CA

Fairchild SemiconductorIn Stock: 4512P6KE43CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6KE43C is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 36.8V
• Voltage - Breakdown (Min): within acceptable tolerance range
• Voltage - Clamping (Max) @ Ipp: within acceptable tolerance range
• Power - Peak Pulse: 600W minimum
• Bidirectional Channels: 1
• Package / Case: DO-204AC (DO-15) Axial
• Mounting Type: Through Hole
• Type: Zener diode

The P6KE43CA from Fairchild Semiconductor meets these substitution criteria, maintaining identical reverse standoff voltage, equivalent power rating, and identical package configuration. Both parts are single-channel bidirectional zener TVS diodes in the same physical form factor.

Parameter Comparison

Engineering Selection Recommendations

The P6KE43CA is a direct functional substitute for the obsolete P6KE43C. Both components share identical reverse standoff voltage (36.8V), equivalent power dissipation (600W), and identical physical packaging (DO-204AC/DO-15 axial through-hole). The P6KE43CA maintains active product status, ensuring long-term availability and supply chain continuity.

The P6KE43CA exhibits a lower clamping voltage (59.3V versus 62.27V) and higher minimum breakdown voltage (40.9V versus 38.75V), both of which represent tighter performance characteristics suitable for the same application space. The operating temperature range of the P6KE43CA (-50°C to 175°C) covers the critical upper temperature specification of the original part, with a 5°C reduction at the lower bound that does not impact typical industrial applications.

Selection of the P6KE43CA is appropriate for direct replacement in existing designs and new implementations requiring 36.8V standoff voltage TVS protection in the DO-15 package format.

Frequently Asked Questions (FAQ)

Q: Can the P6KE43CA be used as a direct pin-for-pin replacement for the P6KE43C?

A: Yes. Both components are bidirectional zener TVS diodes in the DO-204AC (DO-15) axial package with identical pinout and mounting configuration. No circuit board modifications are required.

Q: What is the significance of the voltage differences between the two parts?

A: The P6KE43CA exhibits a clamping voltage of 59.3V compared to the P6KE43C at 62.27V. This 2.97V difference represents improved clamping performance. The higher minimum breakdown voltage (40.9V versus 38.75V) in the P6KE43CA indicates tighter manufacturing tolerances and more predictable transient suppression characteristics.

Q: Are there any temperature range limitations when substituting the P6KE43CA?

A: The P6KE43CA operates from -50°C to 175°C, compared to the P6KE43C range of -55°C to 175°C. The 5°C difference at the lower temperature limit does not affect standard industrial and commercial applications. High-temperature performance remains equivalent at the upper specification limit.

Q: Is the P6KE43CA RoHS compliant?

A: RoHS compliance status for the P6KE43CA is not specified in the available technical data. Verification with the component supplier is recommended if RoHS certification is a mandatory requirement for your application.

Q: Why is the P6KE43C listed as obsolete?

A: Component obsolescence typically results from manufacturer discontinuation decisions. The P6KE43CA provides equivalent functionality with active product status, ensuring continued availability and manufacturing support.

Q: What packaging options are available for the P6KE43CA?

A: The P6KE43CA is supplied in bulk packaging. The component maintains the same DO-204AC (DO-15) axial through-hole package format as the original P6KE43C.