P6KE300CA TVS Diode Equivalent & Substitute Parts

Part Overview

The P6KE300CA is a transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection in through-hole applications. This bidirectional zener diode operates at 256V reverse standoff voltage with a 414V maximum clamping voltage and 1.45A peak pulse current rating. The original Diodes Incorporated P6KE300CA-T is classified as obsolete, necessitating identification of active equivalent parts from alternative manufacturers that maintain identical electrical and mechanical specifications for direct circuit substitution.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	256	V
Voltage - Breakdown (Min)	285	V
Voltage - Clamping (Max) @ Ipp	414	V
Current - Peak Pulse (10/1000µs)	1.45	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	—

Substitute Part Grouping Explanation

Substitution eligibility for the P6KE300CA is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff (Typ): 256V
Voltage - Breakdown (Min): 285V
Voltage - Clamping (Max) @ Ipp: 414V
Current - Peak Pulse (10/1000µs): 1.45A minimum
Power - Peak Pulse: 600W
Mounting Type: Through Hole
Package / Case: DO-204AC or DO-15 (Axial)
Type: Zener, Bidirectional (1 channel)

Substitute parts are grouped into two categories: manufacturer-recommended active alternatives and direct equivalents from alternative manufacturers. All listed substitutes maintain the core electrical specifications and through-hole axial package format required for direct circuit replacement.

Parameter Comparison

Manufacturer	Part Number	Product Status	Vwm (Typ) V	Vc (Max) @ Ipp V	Ipp (10/1000µs) A	Ppk W	Temp Range °C	Package	RoHS
Diodes Incorporated	P6KE300CA-T	Obsolete	256	414	1.45	600	-55 to 175	DO-15	ROHS3
Littelfuse	P6KE300CA-B	Active	256	414	1.5	600	-55 to 175	DO-204AC	ROHS3
Taiwan Semiconductor Corporation	P6KE300CA	Active	256	414	1.5	600	—	DO-15	ROHS3
Comchip Technology	P6KE300CA-G	Active	256	414	1.45	600	-55 to 150	DO-15	ROHS3
Comchip Technology	P6KE300CA-HF	Active	256	414	1.45	600	-55 to 150	DO-15	ROHS3
Micro Commercial Co	P6KE300CA-TP	Active	256	414	1.5	600	-55 to 175	DO-15	—
Micro Commercial Co	P6KE300CA-AP	Active	256	414	1.5	600	-55 to 175	DO-15	—
Micro Commercial Co	P6KE300CA-BP	Active	256	414	1.5	600	-55 to 175	DO-15	—

Engineering Selection Recommendations

All listed substitute parts maintain electrical equivalence to the original P6KE300CA-T specification. Selection should prioritize active product status and compliance certifications:

Primary Recommendations (Manufacturer-Endorsed):

P6KE300CA-B (Littelfuse): Active status, ROHS3 compliant, -55°C to 175°C operating range, DO-204AC package
P6KE300CA (Taiwan Semiconductor Corporation): Active status, ROHS3 compliant, highest inventory availability (9150 pcs), DO-15 package

Secondary Alternatives (Direct Equivalents):

P6KE300CA-G and P6KE300CA-HF (Comchip Technology): Active status, ROHS3 compliant, operating range limited to -55°C to 150°C
P6KE300CA-TP, P6KE300CA-AP, P6KE300CA-BP (Micro Commercial Co): Active status, automotive-grade, -55°C to 175°C operating range

For applications requiring the full -55°C to 175°C temperature range, select from Littelfuse P6KE300CA-B, Taiwan Semiconductor Corporation P6KE300CA, or Micro Commercial Co variants (TP, AP, BP). For applications with maximum operating temperature of 150°C, Comchip Technology options (G, HF) are suitable.

Frequently Asked Questions (FAQ)

Q: Can P6KE300CA-B from Littelfuse directly replace the obsolete P6KE300CA-T? A: Yes. Both parts maintain identical voltage specifications (256V Vwm, 414V Vc), equivalent peak pulse current (1.5A vs. 1.45A), and 600W peak power rating. The primary difference is package designation (DO-204AC vs. DO-15), which are mechanically equivalent axial through-hole formats. Littelfuse P6KE300CA-B is manufacturer-recommended and actively produced.

Q: What is the difference between DO-15 and DO-204AC packages? A: DO-15 and DO-204AC are equivalent package designations for the same axial through-hole diode format. Both accommodate identical lead spacing and board hole patterns. Selection between them does not affect electrical performance or mechanical fit.

Q: Are all substitute parts ROHS3 compliant? A: Littelfuse P6KE300CA-B, Taiwan Semiconductor Corporation P6KE300CA, and Comchip Technology variants (G, HF) carry explicit ROHS3 compliance certification. Micro Commercial Co variants (TP, AP, BP) do not list RoHS status in provided specifications.

Q: Which substitute offers the best inventory availability? A: Taiwan Semiconductor Corporation P6KE300CA provides the highest stock level at 9150 pcs, followed by Littelfuse P6KE300CA-B at 1159 pcs. Both are actively produced and manufacturer-recommended.

Q: Can I use P6KE300CA-G or P6KE300CA-HF if my application operates above 150°C? A: No. Comchip Technology variants are rated to -55°C to 150°C maximum junction temperature. For applications requiring operation to 175°C, select Littelfuse P6KE300CA-B, Taiwan Semiconductor Corporation P6KE300CA, or Micro Commercial Co variants (TP, AP, BP).

Q: Are Micro Commercial Co variants suitable for automotive applications? A: Micro Commercial Co P6KE300CA-TP, P6KE300CA-AP, and P6KE300CA-BP are designated as automotive-grade components with -55°C to 175°C operating range. These are suitable for automotive transient protection circuits.

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