P6KE27A Equivalent & Substitute Parts

Part Overview

The P6KE27A is a unidirectional Zener transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection in through-hole applications. Manufactured by Diodes Incorporated, this component operates with a 23.1V reverse standoff voltage and 37.5V maximum clamping voltage, delivering 16A peak pulse current in a DO-15 package. The original part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for continued circuit protection functionality.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	23.1V
Voltage - Breakdown (Min)	25.7V
Voltage - Clamping (Max) @ Ipp	37.5V
Current - Peak Pulse (10/1000µs)	16A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitution of the P6KE27A is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage specifications must match exactly: 23.1V reverse standoff, 25.7V minimum breakdown, and 37.5V maximum clamping voltage. Peak pulse current must be 16A or greater at the 10/1000µs pulse duration. Power dissipation capacity must equal or exceed 600W peak pulse. Operating temperature range must encompass -55°C to 175°C junction temperature. Package configuration must be through-hole axial or DO-15/DO-204AC equivalent. All substitute parts must be unidirectional Zener diodes with single channel configuration.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package / Case	Product Status
P6KE27A-T	Diodes Incorporated	23.1V	25.7V	37.5V	16A	600W	-55°C ~ 175°C	DO-15	Obsolete
P6KE27A-B	Littelfuse Inc.	23.1V	25.7V	37.5V	16.3A	600W	-55°C ~ 175°C	DO-204AC (DO-15)	Active
P6KE27A	Fairchild Semiconductor	23.1V	25.7V	37.5V	16.8A	600W	-50°C ~ 175°C	DO-15 (DO-204AC)	Active
P6KE27A-AP	Micro Commercial Co	23.1V	25.7V	37.5V	16A	600W	-55°C ~ 175°C	DO-15	Active
P6KE27A-BP	Micro Commercial Co	23.1V	25.7V	37.5V	16A	600W	-55°C ~ 175°C	DO-15	Active
P6KE27A-E3/54	Vishay General Semiconductor - Diodes Division	23.1V	25.7V	37.5V	16A	600W	-55°C ~ 175°C	DO-204AC (DO-15)	Active
P6KE27A-TP	Micro Commercial Co	23.1V	25.7V	37.5V	16A	600W	-55°C ~ 175°C	DO-15	Active
P6KE27AE3/TR13	Microsemi Corporation	23.1V	25.7V	37.5V	16A	600W	-65°C ~ 150°C	Axial	Active
P6KE27AHE3/54	Vishay General Semiconductor - Diodes Division	23.1V	25.7V	37.5V	16A	600W	-55°C ~ 175°C	DO-204AC (DO-15)	Active

Engineering Selection Recommendations

All listed substitute parts maintain electrical equivalence to the P6KE27A-T across voltage, current, and power specifications. Selection among active alternatives depends on product availability, packaging preference, and compliance requirements.

P6KE27A-B (Littelfuse Inc.) and P6KE27A-E3/54 (Vishay) are MFR-recommended and direct manufacturer alternatives with full ROHS3 compliance and active product status. Both support the standard -55°C to 175°C operating range.

P6KE27A-TP (Micro Commercial Co) offers highest inventory availability (5076 pcs) with ROHS3 compliance and cut-tape packaging in DO-15 configuration.

P6KE27AHE3/54 (Vishay) includes automotive-grade qualification (AEC-Q101) with tape & reel packaging, suitable for applications requiring automotive-level reliability.

P6KE27AE3/TR13 (Microsemi Corporation) provides axial package configuration with extended low-temperature rating (-65°C minimum), though upper temperature limit is 150°C versus 175°C for other alternatives.

Fairchild Semiconductor P6KE27A maintains active status with slightly elevated peak pulse current (16.8A) but operates at -50°C minimum versus -55°C for other options.

Frequently Asked Questions (FAQ)

Q: Can P6KE27A-B substitute directly for P6KE27A-T in existing designs?

A: Yes. Both components share identical voltage specifications (23.1V standoff, 25.7V breakdown, 37.5V clamping), 600W peak pulse power, and -55°C to 175°C operating range. P6KE27A-B peak pulse current is 16.3A versus 16A, providing additional margin. Package compatibility exists between DO-15 and DO-204AC designations.

Q: What is the difference between cut-tape and tape & reel packaging?

A: Cut-tape (CT) packaging provides individual component strips suitable for manual assembly or small-volume production. Tape & reel (TR) packaging supplies components on continuous reels for automated pick-and-place assembly. Electrical performance is identical; selection depends on assembly process requirements.

Q: Does operating temperature range affect substitution eligibility?

A: Operating temperature range must encompass the application's thermal requirements. P6KE27AE3/TR13 operates -65°C to 150°C, which is narrower than the standard -55°C to 175°C range. This part is suitable only for applications not exceeding 150°C junction temperature.

Q: Are automotive-grade parts (AEC-Q101) required for all applications?

A: Automotive qualification is application-specific. P6KE27AHE3/54 carries AEC-Q101 qualification for automotive environments. Standard industrial-grade alternatives are suitable for non-automotive applications.

Q: How do peak pulse current ratings above 16A affect circuit protection?

A: Higher peak pulse current ratings (16.3A for P6KE27A-B, 16.8A for Fairchild P6KE27A) provide additional transient suppression margin without changing clamping voltage or standoff characteristics. These are direct substitutes with enhanced performance capability.

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