P6KE18CA-T Equivalent & Substitute Parts

Part Overview

The P6KE18CA-T is a bidirectional transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection applications. This component features a 15.3V reverse standoff voltage, 25.2V maximum clamping voltage, and 600W peak pulse power rating in a through-hole DO-15 package. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	15.3	V
Voltage - Breakdown (Min)	17.1	V
Voltage - Clamping (Max) @ Ipp	25.2	V
Current - Peak Pulse (10/1000µs)	24	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 of the P6KE18CA-T is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff (Typ): 15.3V
Voltage - Breakdown (Min): 17.1V
Voltage - Clamping (Max) @ Ipp: 25.2V
Current - Peak Pulse (10/1000µs): 24A minimum
Power - Peak Pulse: 600W
Bidirectional Channels: 1
Mounting Type: Through Hole
Package compatibility: DO-15 or DO-204AC

Substitute parts are grouped into two categories based on electrical performance and availability status:

Category 1: Direct Electrical Equivalents (Active Status) Parts maintaining identical electrical specifications with current manufacturing status and active inventory.

Category 2: Manufacturer-Recommended Alternatives Parts with equivalent or superior electrical performance recommended by original manufacturers, including variants with different peak pulse current ratings or package configurations.

Parameter Comparison

Manufacturer Part Number	Manufacturer	VWM (Typ) V	VBR (Min) V	VC (Max) V	Ipp A	PPP W	Temp Range °C	Package	Status
P6KE18CA-T	Diodes Incorporated	15.3	17.1	25.2	24	600	-55 to 175	DO-15	Obsolete
P6KE18CA-TP	Micro Commercial Co	15.3	17.1	25.2	24	600	-55 to 175	DO-15	Active
P6KE18CA-AP	Micro Commercial Co	15.3	17.1	25.2	24	600	-55 to 175	DO-15	Active
P6KE18CA-BP	Micro Commercial Co	15.3	17.1	25.2	24	600	-55 to 175	DO-15	Active
P6KE18CA-B	Littelfuse Inc.	15.3	17.1	25.2	24.2	600	-55 to 175	DO-204AC	Active
P6KE18CA	Diotec Semiconductor	15.3	17.1	25.2	25	600	-50 to 175	DO-15	Active
P6KE18CAE3/TR13	Microsemi Corporation	15.3	17.1	25.2	24	600	-65 to 150	Axial	Active
BZW06-15B	Taiwan Semiconductor Corporation	15.3	17.1	32.5	123 (8/20µs)	600	-55 to 175	DO-204AC	Active

Engineering Selection Recommendations

Primary Substitutes (Identical Electrical Performance)

P6KE18CA-TP, P6KE18CA-AP, and P6KE18CA-BP from Micro Commercial Co are direct functional equivalents with active product status and current inventory availability. These parts maintain all critical electrical parameters within specification and are packaged in DO-15 configuration matching the original design. Selection among these three variants depends on packaging requirements: TP (Cut Tape), AP (Bulk), or BP (Bulk).

P6KE18CA from Diotec Semiconductor is an active alternative with marginally higher peak pulse current (25A vs. 24A) and identical clamping voltage. Operating temperature range is -50°C to 175°C, which is acceptable for most applications within the original -55°C to 175°C specification.

Secondary Substitutes (Enhanced Performance)

P6KE18CA-B from Littelfuse Inc. provides equivalent electrical performance with active status. The DO-204AC package is mechanically compatible with DO-15 footprints in through-hole applications.

P6KE18CAE3/TR13 from Microsemi Corporation maintains electrical equivalence in an axial package configuration. Operating temperature range extends to -65°C minimum, providing enhanced low-temperature performance. This variant is suitable for applications requiring extended temperature operation.

Alternative with Enhanced Current Rating

BZW06-15B from Taiwan Semiconductor Corporation maintains the 15.3V reverse standoff voltage and 17.1V breakdown voltage but features a higher clamping voltage (32.5V) and significantly higher peak pulse current (123A at 8/20µs pulse). This part is suitable only when higher transient current handling is required and the elevated clamping voltage is acceptable for the protected circuit.

Frequently Asked Questions (FAQ)

Q: Can P6KE18CA-TP be used as a direct replacement for P6KE18CA-T?

A: Yes. P6KE18CA-TP maintains identical electrical specifications: 15.3V reverse standoff, 17.1V breakdown, 25.2V clamping voltage, and 24A peak pulse current. Both are packaged in DO-15 through-hole configuration. The primary difference is product status (active vs. obsolete) and packaging format (Cut Tape vs. original).

Q: What is the difference between P6KE18CA-AP and P6KE18CA-BP?

A: Both parts are manufactured by Micro Commercial Co with identical electrical specifications. The difference is packaging format: AP is supplied in bulk packaging, while BP is also supplied in bulk. Selection depends on procurement and assembly requirements.

Q: Is BZW06-15B a suitable substitute?

A: BZW06-15B shares the same 15.3V reverse standoff and 17.1V breakdown voltage but has a higher clamping voltage (32.5V vs. 25.2V) and significantly higher peak pulse current capability (123A vs. 24A). This part is suitable only if the protected circuit can tolerate the higher clamping voltage and the enhanced current handling is beneficial or required.

Q: What are the package compatibility considerations?

A: The original P6KE18CA-T uses DO-15 package. Substitutes P6KE18CA-TP, P6KE18CA-AP, P6KE18CA-BP, and P6KE18CA are also DO-15 packaged and are direct mechanical replacements. P6KE18CA-B uses DO-204AC package, which is mechanically compatible with DO-15 footprints. P6KE18CAE3/TR13 uses axial package and requires different PCB footprint consideration.

Q: Does operating temperature range affect substitution?

A: The original P6KE18CA-T operates from -55°C to 175°C. P6KE18CA from Diotec operates from -50°C to 175°C, which is acceptable for most applications. P6KE18CAE3/TR13 extends to -65°C minimum, providing enhanced low-temperature capability. BZW06-15B maintains -55°C to 175°C range. Verify application temperature requirements before selection.

Q: Are all substitutes RoHS3 compliant?

A: P6KE18CA-T, P6KE18CA-TP, P6KE18CA-AP, P6KE18CA-BP, P6KE18CA-B, P6KE18CAE3/TR13, and BZW06-15B are all RoHS3 compliant. P6KE18CA from Diotec has RoHS status listed as not applicable.

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