P4KE30 Equivalent & Substitute Parts

Part Overview

The P4KE30 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in through-hole applications. This part operates with a 25.6V reverse standoff voltage and provides 400W peak pulse power dissipation in a DO-204AL (DO-41) axial package. The P4KE30 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	25.6V
Voltage - Breakdown (Min)	27V
Voltage - Clamping (Max) @ Ipp	43.47V
Current - Peak Pulse (10/1000µs)	9.9A
Power - Peak Pulse	400W
Operating Temperature Range	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE30 is determined by strict electrical and mechanical parameter matching:

Critical Substitution Parameters:

Voltage - Reverse Standoff (Typ): 25.6V
Voltage - Clamping (Max) @ Ipp: 41.4V to 43.47V range
Current - Peak Pulse (10/1000µs): 9.6A to 10A
Power - Peak Pulse: 400W
Package / Case: DO-204AL or DO-41 axial configuration
Mounting Type: Through Hole
Type: Zener, Unidirectional (1 channel)

All identified substitute parts maintain these core electrical specifications within acceptable tolerances and share identical mechanical compatibility with the original P4KE30 footprint and mounting requirements.

Parameter Comparison

Parameter	P4KE30 (Littelfuse)	P4KE30A (Taiwan Semiconductor)	BZW04-26-E3/54 (Vishay)	P4KE30A-AP (Micro Commercial)	P4KE30A-BP (Micro Commercial)	P4KE30A-G (Comchip)	P4KE30A-TP (Micro Commercial)
Voltage - Reverse Standoff (Typ)	25.6V	25.6V	25.6V	25.6V	25.6V	25.6V	25.6V
Voltage - Breakdown (Min)	27V	28.5V	28.5V	28.5V	28.5V	28.5V	28.5V
Voltage - Clamping (Max) @ Ipp	43.47V	41.4V	41.5V	41.4V	41.4V	41.4V	41.4V
Current - Peak Pulse (10/1000µs)	9.9A	10A	9.6A	9.9A	9.9A	9.66A	9.9A
Power - Peak Pulse	400W	400W	400W	400W	400W	400W	400W
Operating Temperature Range	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 175°C
Package / Case	DO-204AL, DO-41	DO-204AL, DO-41	DO-204AL, DO-41	DO-41	DO-41	DO-41	DO-41
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute - P4KE30A (Taiwan Semiconductor Corporation): Active product status with full parameter alignment. ROHS3 compliant. Available in Tape & Reel packaging with 24,200 units in stock. Recommended for new production designs requiring maximum availability and active manufacturer support.

Alternative Substitute - BZW04-26-E3/54 (Vishay General Semiconductor - Diodes Division): Active product from established manufacturer. TransZorb® series designation. ROHS3 and REACH compliant. Clamping voltage of 41.5V and peak pulse current of 9.6A remain within acceptable substitution parameters. Lower inventory (645 units) compared to P4KE30A.

Packaging-Specific Alternatives:

P4KE30A-AP (Micro Commercial Co): Tape & Reel packaging, 790 units in stock
P4KE30A-BP (Micro Commercial Co): Bulk packaging, 744 units in stock
P4KE30A-TP (Micro Commercial Co): Tape & Reel packaging, 755 units in stock
P4KE30A-G (Comchip Technology): Bulk packaging, 617 units in stock. Operating temperature range limited to -55°C ~ 150°C (versus 175°C maximum for other substitutes)

All substitute parts maintain electrical equivalence and mechanical compatibility with the obsolete P4KE30. Selection should prioritize product availability, packaging requirements, and long-term manufacturer support for the intended application.

Frequently Asked Questions (FAQ)

Q: Can P4KE30A variants from different manufacturers be used interchangeably? A: Yes. P4KE30A-AP, P4KE30A-BP, P4KE30A-TP (Micro Commercial Co), and P4KE30A-G (Comchip Technology) share identical electrical specifications and DO-41 package compatibility. Selection depends on packaging format (Tape & Reel versus Bulk) and inventory availability.

Q: What is the difference between P4KE30A and BZW04-26-E3/54? A: Both are electrically equivalent with 25.6V standoff voltage and 400W power rating. BZW04-26-E3/54 is manufactured by Vishay and designated as TransZorb® series. Clamping voltage differs slightly (41.5V versus 41.4V), remaining within acceptable substitution tolerance. Selection depends on supplier preference and availability.

Q: Is P4KE30A-G suitable for high-temperature applications? A: P4KE30A-G operates to a maximum junction temperature of 150°C, compared to 175°C for other substitutes. Applications requiring operation above 150°C should use alternative P4KE30A variants or BZW04-26-E3/54.

Q: Are all substitute parts ROHS3 compliant? A: P4KE30A (Taiwan Semiconductor), BZW04-26-E3/54 (Vishay), P4KE30A-G (Comchip), and P4KE30A-TP (Micro Commercial) are confirmed ROHS3 compliant. Compliance status for P4KE30A-AP and P4KE30A-BP is not specified in available documentation.

Q: What packaging options are available for P4KE30 substitutes? A: Tape & Reel (TR) packaging is available for P4KE30A (Taiwan Semiconductor), P4KE30A-AP, and P4KE30A-TP. Bulk packaging is available for P4KE30A-BP and P4KE30A-G. BZW04-26-E3/54 is supplied in Tape & Reel format.

Q: Can the P4KE30 be replaced in existing PCB designs without layout modifications? A: Yes. All substitute parts use identical DO-204AL or DO-41 axial through-hole packages with matching pin spacing and mechanical footprint compatibility.

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