P4KE75 Equivalent & Substitute Parts

Part Overview

The P4KE75 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 64.1V reverse standoff voltage, 108.15V maximum clamping voltage, and 400W peak pulse power rating in a through-hole DO-204AL (DO-41) axial package. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	64.1V
Voltage - Breakdown (Min)	67.55V
Voltage - Clamping (Max) @ Ipp	108.15V
Current - Peak Pulse (10/1000µs)	4A
Power - Peak Pulse	400W
Type	Zener
Unidirectional Channels	1
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature	-55°C ~ 175°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the P4KE75 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 64.1V ± tolerance
Voltage - Clamping (Max) @ Ipp: 103V to 108.15V range
Current - Peak Pulse (10/1000µs): 3.88A to 5A
Power - Peak Pulse: 400W to 500W
Type: Zener, Unidirectional
Mounting Type: Through Hole
Package / Case: DO-204AL (DO-41) or DO-204AC (DO-15)
Operating Temperature: -55°C minimum to 150°C or higher maximum
RoHS Status: ROHS3 Compliant

All substitute parts listed maintain electrical compatibility within the specified voltage and current parameters while preserving the through-hole axial package form factor required for direct board-level replacement.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Product Status	Operating Temperature
P4KE75	Littelfuse Inc.	64.1V	108.15V	4A	400W	DO-204AL (DO-41)	Obsolete	-55°C ~ 175°C
P4KE75A	Taiwan Semiconductor Corporation	64.1V	103V	4A	400W	DO-204AL (DO-41)	Active	-55°C ~ 175°C
SA64A	Taiwan Semiconductor Corporation	64V	103V	5A	500W	DO-204AC (DO-15)	Active	-55°C ~ 175°C
BZW04-64-E3/54	Vishay General Semiconductor - Diodes Division	64.1V	103V	3.9A	400W	DO-204AL (DO-41)	Active	-55°C ~ 175°C
P4KE75A-E3/54	Vishay General Semiconductor - Diodes Division	64.1V	103V	3.9A	400W	DO-204AL (DO-41)	Active	-55°C ~ 175°C
P4KE75AHE3/54	Vishay General Semiconductor - Diodes Division	64.1V	103V	3.9A	400W	DO-204AL (DO-41)	Active	-55°C ~ 175°C
P4KE75A-AP	Micro Commercial Co	64.1V	103V	4A	400W	DO-204AL (DO-41)	Active	-55°C ~ 175°C
P4KE75A-BP	Micro Commercial Co	64.1V	103V	4A	400W	DO-204AL (DO-41)	Active	-55°C ~ 175°C
P4KE75A-G	Comchip Technology	64.1V	103V	3.88A	400W	DO-204AL (DO-41)	Active	-55°C ~ 150°C
P4KE75A-TP	Micro Commercial Co	64.1V	103V	4A	400W	DO-204AL (DO-41)	Active	-55°C ~ 175°C

Engineering Selection Recommendations

Primary Substitutes (Identical Package, Active Status):

P4KE75A (Taiwan Semiconductor Corporation) and P4KE75A-E3/54 (Vishay) are direct functional equivalents with active product status. Both maintain the DO-204AL (DO-41) package, 64.1V reverse standoff voltage, and 400W power rating. The clamping voltage specification of 103V is within acceptable tolerance of the original 108.15V specification. These parts are ROHS3 compliant and suitable for general-purpose applications.

Automotive-Grade Alternative:

P4KE75AHE3/54 (Vishay) provides the same electrical specifications as P4KE75A-E3/54 with AEC-Q101 automotive qualification. This part is appropriate for designs requiring automotive-grade component certification.

Enhanced Current Rating Alternative:

SA64A (Taiwan Semiconductor Corporation) offers increased peak pulse current (5A) and power rating (500W) while maintaining the 64V reverse standoff voltage and 103V clamping voltage. The package differs as DO-204AC (DO-15) instead of DO-204AL (DO-41), requiring PCB layout modification for direct substitution.

Bulk Packaging Options:

P4KE75A-AP, P4KE75A-BP, and P4KE75A-TP (Micro Commercial Co) provide identical electrical specifications to P4KE75A in bulk packaging. These are suitable for high-volume production environments where tape-and-reel or bulk formats are preferred.

Temperature-Constrained Alternative:

P4KE75A-G (Comchip Technology) operates to 150°C maximum junction temperature, compared to 175°C for other substitutes. This part is suitable only for applications where the reduced upper temperature limit does not conflict with thermal design requirements.

Frequently Asked Questions (FAQ)

Q: Can P4KE75A directly replace P4KE75 without PCB modification?

A: Yes. P4KE75A maintains identical reverse standoff voltage (64.1V), peak pulse current (4A), power rating (400W), and DO-204AL (DO-41) axial through-hole package. The clamping voltage specification of 103V is within acceptable tolerance of the original 108.15V. No PCB layout changes are required.

Q: What is the difference between P4KE75A-E3/54 and P4KE75A-AP?

A: Both parts share identical electrical specifications (64.1V standoff, 103V clamping, 4A peak pulse, 400W power). The primary difference is packaging format: P4KE75A-E3/54 is supplied in tape-and-reel format by Vishay, while P4KE75A-AP is supplied in bulk format by Micro Commercial Co. Electrical performance is equivalent.

Q: Why does SA64A have different package designation (DO-204AC vs DO-204AL)?

A: SA64A uses DO-204AC (DO-15) package instead of DO-204AL (DO-41). While both are axial through-hole packages, the physical dimensions differ. DO-204AC has a larger body diameter. Direct PCB substitution requires layout verification to confirm lead spacing and component clearance compatibility.

Q: Is P4KE75A-G suitable for all temperature ranges?

A: P4KE75A-G operates to -55°C to 150°C junction temperature, compared to -55°C to 175°C for other substitutes. Verify that your application's thermal environment does not exceed 150°C junction temperature. For designs requiring operation above 150°C, select alternative parts with 175°C maximum rating.

Q: What does AEC-Q101 qualification on P4KE75AHE3/54 indicate?

A: AEC-Q101 is an automotive industry standard qualification for discrete semiconductors. P4KE75AHE3/54 meets automotive reliability and quality requirements. This part is appropriate for automotive and mission-critical applications where component qualification documentation is required.

Q: Can I use SA64A as a drop-in replacement if my circuit board has DO-204AL footprint?

A: No. SA64A uses DO-204AC (DO-15) package with different lead spacing than DO-204AL (DO-41). Physical footprint modification is required. However, SA64A provides enhanced specifications (5A peak pulse, 500W power) if layout redesign is feasible.

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