P4KE75-B Equivalent & Substitute Parts

Part Overview

The P4KE75-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This unidirectional zener diode operates in the 64.1V reverse standoff voltage range with a maximum clamping voltage of 108.15V at peak pulse current. The component is packaged in a through-hole DO-204AL (DO-41) axial configuration and rated for 400W peak pulse power dissipation.

The P4KE75-B is classified as obsolete. Equivalent and substitute parts are available from active product lines that maintain electrical and mechanical compatibility, enabling continued system design and maintenance without circuit redesign.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	64.1	V
Voltage - Breakdown (Min)	67.55	V
Voltage - Clamping (Max) @ Ipp	108.15	V
Current - Peak Pulse (10/1000µs)	4	A
Power - Peak Pulse	400	W
Operating Temperature Range	-55 to 175	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the P4KE75-B is determined by strict equivalence in the following electrical and mechanical parameters:

Reverse standoff voltage: 64.1V (Typ)
Peak pulse current rating: 4A
Peak pulse power rating: 400W
Operating temperature range: -55°C to 175°C
Mounting type: Through hole
Package configuration: DO-204AL (DO-41) axial
Unidirectional channel configuration: 1 channel
Device type: Zener TVS diode

Substitute parts must maintain these specifications to ensure functional and physical compatibility within the circuit. Variations in clamping voltage (within the same voltage class) are acceptable provided the maximum clamping voltage does not exceed system protection thresholds.

Parameter Comparison

Parameter	P4KE75-B (Main)	P4KE75A (TSC)	P4KE75A-B (Littelfuse)
Manufacturer	Littelfuse Inc.	Taiwan Semiconductor Corporation	Littelfuse Inc.
Product Status	Obsolete	Active	Active
Voltage - Reverse Standoff (Typ)	64.1V	64.1V	64.1V
Voltage - Breakdown (Min)	67.55V	71.3V	71.3V
Voltage - Clamping (Max) @ Ipp	108.15V	103V	103V
Current - Peak Pulse (10/1000µs)	4A	4A	4A
Power - Peak Pulse	400W	400W	400W
Operating Temperature	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL (DO-41)	DO-204AL (DO-41)	DO-204AL (DO-41)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	—	Tape & Reel (TR)	Bulk

Engineering Selection Recommendations

Both P4KE75A (Taiwan Semiconductor Corporation) and P4KE75A-B (Littelfuse Inc.) are active product alternatives to the obsolete P4KE75-B. Selection between these substitutes is based on supply chain and packaging requirements:

P4KE75A-B (Littelfuse Inc.) maintains the same manufacturer as the original part, ensuring consistency in manufacturing process and quality standards. This part is available in bulk packaging and carries active product status with full ROHS3 compliance and REACH unaffected designation.

P4KE75A (Taiwan Semiconductor Corporation) provides an alternative source with identical electrical specifications and is available in tape and reel packaging format. This part also maintains active product status with ROHS3 compliance and REACH unaffected designation.

Both substitutes exhibit lower maximum clamping voltage (103V versus 108.15V), which provides improved protection margin in overvoltage transient suppression applications while maintaining all other electrical and mechanical compatibility requirements.

Frequently Asked Questions (FAQ)

Q: Can P4KE75A and P4KE75A-B be used interchangeably with P4KE75-B?

A: Yes. Both parts maintain identical reverse standoff voltage (64.1V), peak pulse current (4A), peak pulse power (400W), operating temperature range (-55°C to 175°C), and through-hole DO-204AL (DO-41) package configuration. The lower clamping voltage in the substitutes (103V versus 108.15V) represents improved transient suppression performance.

Q: What is the difference between P4KE75A and P4KE75A-B?

A: The primary difference is packaging format. P4KE75A is supplied in tape and reel (TR) format, while P4KE75A-B is supplied in bulk format. Both parts are manufactured to identical electrical specifications and are functionally equivalent. Selection depends on assembly process requirements and procurement volume.

Q: Are there any compliance or certification differences between these parts?

A: All three parts (P4KE75-B, P4KE75A, and P4KE75A-B) are ROHS3 compliant. P4KE75A and P4KE75A-B carry REACH unaffected designation. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Q: Why is the clamping voltage lower in the substitute parts?

A: The substitute parts (P4KE75A and P4KE75A-B) specify a maximum clamping voltage of 103V compared to 108.15V in the P4KE75-B. This represents a tighter specification that provides enhanced transient voltage suppression performance. The lower clamping voltage is within acceptable design margins for general-purpose overvoltage protection applications.

Q: What is the moisture sensitivity level for these parts?

A: All three parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage or handling.

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