P6KE43CA-T Equivalent & Substitute Parts

Part Overview

The P6KE43CA-T is a transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection applications. This component features a 36.8V reverse standoff voltage with a 59.3V clamping voltage and 10.1A peak pulse current capability in a through-hole DO-15 package. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	36.8V
Voltage - Breakdown (Min)	40.9V
Voltage - Clamping (Max) @ Ipp	59.3V
Current - Peak Pulse (10/1000µs)	10.1A
Power - Peak Pulse	600W
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Operating Temperature Range	-55°C ~ 175°C (TJ)
Type	Zener
Bidirectional Channels	1

Substitute Part Grouping Explanation

Substitution eligibility for the P6KE43CA-T is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff (Typ): 36.8V
Voltage - Breakdown (Min): 40.9V
Voltage - Clamping (Max) @ Ipp: 59.3V
Current - Peak Pulse (10/1000µs): 10.1A minimum
Power - Peak Pulse: 600W
Mounting Type: Through Hole
Package / Case: DO-204AC or DO-15
Type: Zener, Bidirectional, Single Channel

All identified substitute parts maintain these electrical specifications within the allowed tolerance range. Packaging variants (bulk, cut tape) and manufacturer differences do not affect electrical interchangeability when core parameters remain constant.

Parameter Comparison

Part Number	Manufacturer	VWM (Typ)	VBR (Min)	VC (Max)	Ipp (A)	Package	Temp Range	Status
P6KE43CA-T	Diodes Incorporated	36.8V	40.9V	59.3V	10.1A	DO-15	-55°C ~ 175°C	Obsolete
P6KE43CA	Fairchild Semiconductor	36.8V	40.9V	59.3V	10.6A	DO-15	-50°C ~ 175°C	Active
P6KE43CA-AP	Micro Commercial Co	36.8V	40.9V	59.3V	10.1A	DO-15	-55°C ~ 175°C	Active
P6KE43CA-BP	Micro Commercial Co	36.8V	40.9V	59.3V	10.1A	DO-15	-55°C ~ 175°C	Active
P6KE43CA-B	Littelfuse Inc.	36.8V	40.9V	59.3V	10.3A	DO-204AC	-55°C ~ 175°C	Active
P6KE43CA-TP	Micro Commercial Co	36.8V	40.9V	59.3V	10.1A	DO-15	-55°C ~ 175°C	Active
P6KE43CAE3/TR13	Microsemi Corporation	36.8V	40.9V	59.3V	10.1A	Axial	-65°C ~ 150°C	Active
TP6KE43CA	Littelfuse Inc.	36.8V	40.9V	59.3V	10.3A	DO-204AC	-55°C ~ 175°C	Active

Engineering Selection Recommendations

All listed substitute parts maintain electrical equivalence to the P6KE43CA-T across voltage and current specifications. Selection should prioritize active product status for long-term availability and supply chain stability.

For applications requiring RoHS3 compliance, P6KE43CA-TP, P6KE43CA-B, and TP6KE43CA are certified compliant. The P6KE43CA from Fairchild Semiconductor and P6KE43CA-AP, P6KE43CA-BP from Micro Commercial Co provide active alternatives with identical electrical performance.

For automotive-grade applications, TP6KE43CA from Littelfuse Inc. carries AEC-Q101 qualification and automotive grade designation. P6KE43CA-AP and P6KE43CA-BP from Micro Commercial Co are designated as automotive grade.

Package selection depends on assembly requirements: DO-15 and DO-204AC packages are functionally equivalent for through-hole mounting. The P6KE43CAE3/TR13 from Microsemi Corporation offers an axial package variant with extended low-temperature operation to -65°C, suitable for applications requiring broader temperature coverage.

Frequently Asked Questions (FAQ)

Q: Can P6KE43CA from Fairchild Semiconductor directly replace P6KE43CA-T?

A: Yes. Both parts maintain identical voltage specifications (36.8V standoff, 40.9V breakdown, 59.3V clamping). The Fairchild part delivers 10.6A peak pulse current, exceeding the original 10.1A specification. Operating temperature range differs slightly (-50°C to 175°C versus -55°C to 175°C), which is acceptable for most applications.

Q: What is the difference between DO-15 and DO-204AC packages?

A: DO-15 and DO-204AC are equivalent designations for the same through-hole axial package. Both support identical electrical performance and mechanical mounting. Package selection does not affect substitution eligibility.

Q: Are P6KE43CA-AP and P6KE43CA-BP interchangeable?

A: Yes. Both parts from Micro Commercial Co maintain identical electrical specifications, operating temperature range, and package configuration. Differences exist only in packaging format (bulk designation) and internal manufacturing processes that do not affect electrical performance.

Q: Why does TP6KE43CA have a different part number prefix?

A: The TP prefix indicates Littelfuse Inc.'s automotive-qualified variant of the P6KE43 series. Electrical specifications remain identical to the base P6KE43CA. The TP designation reflects automotive-grade qualification (AEC-Q101) and cut-tape packaging format, not electrical differences.

Q: Is P6KE43CAE3/TR13 suitable for all applications requiring P6KE43CA-T?

A: P6KE43CAE3/TR13 maintains electrical equivalence but uses an axial package instead of DO-15. Operating temperature range is -65°C to 150°C, providing lower minimum temperature but reduced maximum temperature compared to the original -55°C to 175°C. Verify application temperature requirements before selection.

Q: Which substitute offers the best long-term availability?

A: TP6KE43CA from Littelfuse Inc. and P6KE43CA-TP from Micro Commercial Co both carry active product status with high inventory levels (8,625 and 4,888 units respectively). Both are RoHS3 compliant and suitable for new designs.

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