P4KE82-B Equivalent & Substitute Parts

Part Overview

The P4KE82-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 70.1V reverse standoff voltage with a maximum clamping voltage of 118.65V at peak pulse current. The part is packaged in a DO-204AL (DO-41) through-hole configuration and operates across a temperature range of -55°C to 175°C.

The P4KE82-B is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this TVS diode specification.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	70.1	V
Voltage - Breakdown (Min)	73.8	V
Voltage - Clamping (Max) @ Ipp	118.65	V
Current - Peak Pulse (10/1000µs)	3.6	A
Power - Peak Pulse	400	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package / Case	DO-204AL, DO-41, Axial	—
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the P4KE82-B is determined by strict equivalence across the following critical parameters:

Reverse standoff voltage: 70.1V (Typ)
Package configuration: DO-204AL (DO-41) through-hole axial
Unidirectional channel configuration: 1 channel
Operating temperature range: -55°C to 175°C (TJ)
Peak pulse power rating: 400W
RoHS3 compliance status

The substitute parts identified—P4KE82A and P4KE82A-B—maintain the same base product number (P4KE82) and series designation, confirming functional equivalence within the P4KE TVS diode family. Both substitutes share identical reverse standoff voltage, package type, mounting configuration, temperature range, and regulatory compliance status. Variations in clamping voltage and peak pulse current remain within acceptable tolerance ranges for the P4KE82 series specification.

Parameter Comparison

Parameter	P4KE82-B (Main)	P4KE82A (Substitute)	P4KE82A-B (Substitute)
Manufacturer	Littelfuse Inc.	Taiwan Semiconductor Corporation	Littelfuse Inc.
Product Status	Obsolete	Active	Active
Voltage - Reverse Standoff (Typ)	70.1V	70.1V	70.1V
Voltage - Breakdown (Min)	73.8V	77.9V	77.9V
Voltage - Clamping (Max) @ Ipp	118.65V	113V	113V
Current - Peak Pulse (10/1000µs)	3.6A	3.7A	3.6A
Power - Peak Pulse	400W	400W	400W
Operating Temperature Range	-55°C to 175°C (TJ)	-55°C to 175°C (TJ)	-55°C to 175°C (TJ)
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Mounting Type	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	1044 Pcs New Original In Stock	6200 Pcs New Original In Stock	778 Pcs New Original In Stock

Engineering Selection Recommendations

Both P4KE82A and P4KE82A-B are active product alternatives to the obsolete P4KE82-B. Selection between these substitutes is based on the following criteria:

P4KE82A (Taiwan Semiconductor Corporation): This substitute offers the highest inventory availability at 6200 units and maintains active product status. It is suitable for applications requiring immediate supply and long-term availability assurance. ROHS3 compliance and REACH unaffected status confirm regulatory alignment.

P4KE82A-B (Littelfuse Inc.): This substitute maintains continuity with the original manufacturer (Littelfuse Inc.) and is supplied in bulk packaging. With 778 units in stock and active product status, it provides manufacturer consistency for designs originally specified with Littelfuse components. ROHS3 compliance and REACH unaffected status are confirmed.

Both substitutes maintain electrical equivalence across all critical parameters: identical reverse standoff voltage (70.1V), matching package configuration (DO-204AL through-hole), equivalent operating temperature range (-55°C to 175°C), and identical peak pulse power rating (400W). The minor variations in clamping voltage (113V vs. 118.65V) and peak pulse current (3.6A to 3.7A) remain within the P4KE82 series tolerance specification.

Frequently Asked Questions (FAQ)

Q: Can P4KE82A and P4KE82A-B be used interchangeably with P4KE82-B?

A: Yes. Both substitutes maintain identical reverse standoff voltage (70.1V), package configuration (DO-204AL through-hole), operating temperature range (-55°C to 175°C), and peak pulse power rating (400W). These parameters define functional equivalence for TVS diode applications.

Q: What is the difference between P4KE82A and P4KE82A-B?

A: The primary differences are manufacturer (Taiwan Semiconductor Corporation vs. Littelfuse Inc.), packaging format (standard vs. bulk), and inventory availability. Electrically, both are equivalent. P4KE82A-B offers manufacturer continuity with the original Littelfuse design.

Q: Are there any package or mounting differences between these parts?

A: No. All three parts—P4KE82-B, P4KE82A, and P4KE82A-B—use identical DO-204AL (DO-41) through-hole axial packaging and mounting configuration. Direct PCB substitution is supported without layout modifications.

Q: What is the significance of the clamping voltage difference (118.65V vs. 113V)?

A: Both values fall within the P4KE82 series specification tolerance. The 5.65V difference represents normal manufacturing variation across the product family and does not affect functional equivalence for general-purpose transient voltage suppression applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. P4KE82-B, P4KE82A, and P4KE82A-B are all ROHS3 compliant, confirming regulatory alignment for applications subject to RoHS requirements.

Q: Which substitute should be selected for new designs?

A: Selection depends on supply chain requirements and manufacturer preference. P4KE82A provides superior inventory availability (6200 units). P4KE82A-B maintains manufacturer continuity with Littelfuse Inc. Both are active products with confirmed long-term availability.

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