P6KE27CA-T Equivalent & Substitute Parts

Part Overview

The P6KE27CA-T is a transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in through-hole applications. This component features a 23.1V reverse standoff voltage, 37.5V maximum clamping voltage, and 16A peak pulse current capability in a DO-15 axial package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing design support and production requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	23.1	V
Voltage - Breakdown (Min)	25.7	V
Voltage - Clamping (Max) @ Ipp	37.5	V
Current - Peak Pulse (10/1000µs)	16	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 175	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
Type	Zener	—
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the P6KE27CA-T is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff (Typ): 23.1V
Voltage - Breakdown (Min): 25.7V
Voltage - Clamping (Max) @ Ipp: 37.5V
Current - Peak Pulse (10/1000µs): 16A minimum
Power - Peak Pulse: 600W
Mounting Type: Through Hole
Package / Case: DO-204AC, DO-15, or Axial equivalent
Type: Zener diode, single bidirectional channel
RoHS Status: ROHS3 Compliant

All identified substitute parts meet these electrical and mechanical requirements. Variations in peak pulse current (16A to 16.8A) and operating temperature ranges remain within acceptable tolerance bands for this product category. Packaging format differences (Cut Tape, Bulk, Tape & Reel) do not affect electrical performance and reflect supplier distribution options.

Parameter Comparison

Manufacturer Part Number	Manufacturer	VWM (Typ) [V]	VBR (Min) [V]	VC (Max) @ Ipp [V]	Ipp (10/1000µs) [A]	Ppk [W]	Tj Range [°C]	Package	Status	Inventory [Pcs]
P6KE27CA-T	Diodes Incorporated	23.1	25.7	37.5	16	600	-55 to 175	DO-15	Obsolete	739
P6KE27CA-B	Littelfuse Inc.	23.1	25.7	37.5	16.3	600	-55 to 175	DO-204AC (DO-15)	Active	712
P6KE27CA	Diotec Semiconductor	23.1	25.7	37.5	16.8	600	-50 to 175	DO-15 (DO-204AC)	Active	17400
P6KE27CA-AP	Micro Commercial Co	23.1	25.7	37.5	16	600	-55 to 175	DO-15	Active	961
P6KE27CA-BP	Micro Commercial Co	23.1	25.7	37.5	16	600	-55 to 175	DO-15	Active	975
P6KE27CA-E3/54	Vishay General Semiconductor - Diodes Division	23.1	25.7	37.5	16	600	-55 to 175	DO-204AC (DO-15)	Active	12604
P6KE27CA-TP	Micro Commercial Co	23.1	25.7	37.5	16	600	-55 to 175	DO-15	Active	736
P6KE27CAE3/TR13	Microsemi Corporation	23.1	25.7	37.5	16	600	-65 to 150	Axial	Active	834
P6KE27CAHE3/54	Vishay General Semiconductor - Diodes Division	23.1	25.7	37.5	16	600	-55 to 175	DO-204AC (DO-15)	Active	1035

Engineering Selection Recommendations

All identified substitute parts are active products with ROHS3 compliance, making them suitable for long-term production support. Selection should prioritize inventory availability and supply chain stability:

Primary Recommendation: P6KE27CA (Diotec Semiconductor) offers the highest inventory level (17,400 pcs) with full electrical equivalence and active product status. Operating temperature range extends to -50°C minimum, which is acceptable for most applications requiring -55°C operation.

Secondary Recommendations: P6KE27CA-E3/54 (Vishay TransZorb® series, 12,604 pcs) and P6KE27CAHE3/54 (Vishay, automotive-qualified AEC-Q101, 1,035 pcs) provide robust alternatives. The CAHE3/54 variant includes automotive-grade qualification for applications requiring enhanced reliability documentation.

Tertiary Options: P6KE27CA-B (Littelfuse, 712 pcs), P6KE27CA-AP (Micro Commercial Co, 961 pcs), P6KE27CA-BP (Micro Commercial Co, 975 pcs), and P6KE27CA-TP (Micro Commercial Co, 736 pcs) maintain full electrical equivalence with adequate inventory levels.

Package Consideration: P6KE27CAE3/TR13 (Microsemi, Axial package, 834 pcs) is electrically equivalent but features a different package format (T-18 Axial vs. DO-15). This variant is suitable only if board layout accommodates axial lead spacing and if operating temperature range of -65°C to 150°C meets application requirements.

Frequently Asked Questions (FAQ)

Q: Can P6KE27CA-T be directly replaced with any of these substitute parts?

A: Yes. All listed substitute parts maintain identical voltage ratings (23.1V standoff, 25.7V breakdown, 37.5V clamping), peak pulse current of 16A or greater, and 600W peak power dissipation. Electrical performance is equivalent across all DO-15 and DO-204AC packaged variants.

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

A: DO-15 and DO-204AC are equivalent designations for the same axial through-hole package format. Both refer to a two-lead diode in a cylindrical body with axial leads. Parts specified as "DO-204AC (DO-15)" or "DO-15 (DO-204AC)" are interchangeable in PCB layouts.

Q: Why does P6KE27CA show -50°C minimum operating temperature instead of -55°C?

A: The Diotec P6KE27CA variant specifies -50°C to 175°C operating range, which is 5°C warmer at the lower limit compared to the original P6KE27CA-T (-55°C to 175°C). This difference is acceptable for most industrial and commercial applications. If -55°C operation is mandatory, select alternatives such as P6KE27CA-B, P6KE27CA-AP, P6KE27CA-BP, P6KE27CA-E3/54, P6KE27CA-TP, or P6KE27CAHE3/54.

Q: What does "automotive-qualified" mean for P6KE27CAHE3/54?

A: The P6KE27CAHE3/54 carries AEC-Q101 qualification, indicating compliance with automotive industry reliability and quality standards. This variant is suitable for automotive and mission-critical applications requiring enhanced traceability and qualification documentation. Electrical performance is identical to non-qualified variants.

Q: Is there a difference in reliability between Littelfuse, Vishay, Diotec, Micro Commercial Co, Microsemi, and Diodes Incorporated versions?

A: All manufacturers listed are established semiconductor suppliers with established quality systems. Electrical specifications are equivalent. Selection should be based on supply chain availability, inventory levels, and any specific qualification requirements (such as AEC-Q101 for automotive applications).

Q: Can P6KE27CAE3/TR13 (Axial package) be used as a direct substitute?

A: P6KE27CAE3/TR13 is electrically equivalent but uses an axial lead package (T-18) instead of the DO-15 format. Direct PCB substitution is not possible without layout modification. Additionally, its operating temperature range (-65°C to 150°C) has a lower maximum temperature (150°C vs. 175°C), which may not be suitable for all applications. Use only if board design accommodates axial lead spacing and application temperature requirements are met.

Q: What packaging formats are available?

A: Substitute parts are available in Cut Tape (CT), Bulk, and Tape & Reel (TR) formats. These represent distribution and handling options only and do not affect electrical performance. Select based on procurement and assembly process requirements.

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