P6KE33CA Equivalent & Substitute Parts

Part Overview

The P6KE33CA is a transient voltage suppressor (TVS) diode in DO-15 axial package configuration, designed for general-purpose transient voltage protection applications. The original Diodes Incorporated P6KE33CA is classified as obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain electrical performance within the specified voltage and current parameters while meeting the same packaging and compliance requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	28.2	V
Voltage - Breakdown (Min)	31.4	V
Voltage - Clamping (Max) @ Ipp	45.7	V
Current - Peak Pulse (10/1000µs)	13.2	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

Substitute parts for the P6KE33CA are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 28.2V
Voltage - Breakdown (Min): 31.4V
Voltage - Clamping (Max) @ Ipp: 45.7V
Current - Peak Pulse (10/1000µs): 13.2A nominal (tolerance range 13.1A to 13.8A acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-204AC or DO-15 (axial through-hole)
Type: Zener diode, single bidirectional channel
RoHS3 Compliance: Required

Substitute parts are grouped into two categories:

Category A - Direct Electrical & Package Equivalents: Parts maintaining all key electrical parameters (28.2V standoff, 31.4V breakdown, 45.7V clamp, 13.2A peak pulse, 600W power) in DO-15 or DO-204AC package with active product status.

Category B - Reduced Current Rating Alternative: BZW04-28B maintains voltage parameters but operates at 8.8A peak pulse and 400W power rating, suitable only for applications with lower transient current requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Vwm (Typ) V	Vbr (Min) V	Vc (Max) V	Ipp A	Ppk W	Tj Range °C	Package	RoHS3
P6KE33CA	Diodes Incorporated	Obsolete	28.2	31.4	45.7	13.2	600	-55 to 175	DO-15	Yes
P6KE33CA	Diotec Semiconductor	Active	28.2	31.4	45.7	13.8	600	-50 to 175	DO-15	Yes
P6KE33CA-AP	Micro Commercial Co	Active	28.2	31.4	45.7	13.2	600	-55 to 175	DO-15	—
P6KE33CA-BP	Micro Commercial Co	Active	28.2	31.4	45.7	13.2	600	-55 to 175	DO-15	—
P6KE33CA-TP	Micro Commercial Co	Active	28.2	31.4	45.7	13.2	600	-55 to 175	DO-15	Yes
P6KE33CAE3/TR13	Microsemi Corporation	Active	28.2	31.4	45.7	13.2	600	-65 to 150	Axial	Yes
P6KE33CA-B	Littelfuse	Active	28.2	31.4	45.7	13.3	600	-55 to 175	DO-204AC	Yes
BZW06-28B	Diotec Semiconductor	Active	28.2	31.4	45.7	13.1	600	-50 to 175	DO-15	Yes
BZW04-28B	Diotec Semiconductor	Active	28.2	31.4	45.7	8.8	400	-50 to 175	DO-15	Yes

Engineering Selection Recommendations

Primary Substitutes (Full Electrical & Thermal Equivalence):

P6KE33CA (Diotec Semiconductor): Active product status with identical voltage parameters and 13.8A peak pulse rating. Operating temperature range -50°C to 175°C is acceptable for most applications requiring -55°C to 175°C performance, with verification required for extreme low-temperature operation.
P6KE33CA-TP (Micro Commercial Co): Active status, identical electrical specifications to original, -55°C to 175°C operating range, RoHS3 compliant. Cut tape packaging suitable for automated assembly.
P6KE33CA-B (Littelfuse): Active status, 13.3A peak pulse, full -55°C to 175°C operating range, RoHS3 compliant. DO-204AC package equivalent to DO-15.
BZW06-28B (Diotec Semiconductor): Active status, 13.1A peak pulse, 600W power rating, RoHS3 compliant. Functionally equivalent with -50°C to 175°C operating range.

Secondary Substitute (Reduced Current Rating):

BZW04-28B (Diotec Semiconductor): Maintains voltage specifications but operates at 8.8A peak pulse and 400W power. Selection limited to applications with transient current requirements below 8.8A.

Temperature-Constrained Substitute:

P6KE33CAE3/TR13 (Microsemi Corporation): Axial package configuration, full electrical equivalence, but operating temperature range -65°C to 150°C. Suitable only for applications not requiring operation above 150°C.

Compliance Verification:

All recommended primary substitutes maintain RoHS3 compliance. Applications requiring REACH compliance should confirm with supplier documentation for specific substitute selections.

Frequently Asked Questions (FAQ)

Q: Can P6KE33CA-TP replace the original P6KE33CA directly?

A: Yes. P6KE33CA-TP from Micro Commercial Co maintains identical electrical parameters (28.2V standoff, 31.4V breakdown, 45.7V clamp, 13.2A peak pulse, 600W power), operating temperature range -55°C to 175°C, and DO-15 package configuration. The difference is packaging format (cut tape vs. bulk).

Q: What is the difference between P6KE33CA-AP, P6KE33CA-BP, and P6KE33CA-TP?

A: All three are from Micro Commercial Co with identical electrical specifications. The suffix indicates packaging: -AP (bulk), -BP (bulk), -TP (cut tape). Selection depends on assembly process requirements.

Q: Is BZW06-28B a suitable replacement?

A: Yes, for applications within its specifications. BZW06-28B maintains all voltage parameters (28.2V standoff, 31.4V breakdown, 45.7V clamp) and peak pulse current (13.1A), with 600W power rating. Operating temperature range is -50°C to 175°C, requiring verification for applications requiring -55°C operation.

Q: When should BZW04-28B be used instead of other substitutes?

A: BZW04-28B is specified only for applications where transient current does not exceed 8.8A and power dissipation remains below 400W. It maintains voltage specifications but cannot handle the full 13.2A peak pulse of the original part.

Q: Does operating temperature range affect substitute selection?

A: Yes. Most substitutes operate -50°C to 175°C, acceptable for applications requiring -55°C to 175°C with verification of low-temperature performance. P6KE33CAE3/TR13 operates -65°C to 150°C, unsuitable for applications requiring operation above 150°C.

Q: Are all substitutes RoHS3 compliant?

A: Primary substitutes (P6KE33CA from Diotec, P6KE33CA-TP, P6KE33CA-B, BZW06-28B, BZW04-28B) are RoHS3 compliant. Verify compliance documentation for Micro Commercial Co variants P6KE33CA-AP and P6KE33CA-BP.

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 diode package. Both are interchangeable in circuit design and PCB layout.

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