P4KE8.2 Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The P4KE8.2 is a unidirectional Zener transient voltage suppressor (TVS) diode in DO-204AL (DO-41) axial through-hole package, designed for general-purpose overvoltage protection applications. With a reverse standoff voltage of 7.02V and peak pulse power rating of 400W, this component provides clamping protection in 6.6V nominal circuits.

The original P4KE8.2 manufactured by Littelfuse Inc. is classified as obsolete. Equivalent substitute parts are available from Taiwan Semiconductor Corporation and Comchip Technology, both maintaining active product status and full compatibility with the original electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	7.02V	V
Voltage - Clamping (Max) @ Ipp	12.71V	V
Current - Peak Pulse (10/1000µs)	33.9A	A
Power - Peak Pulse	400W	W
Operating Temperature Range	-55°C ~ 175°C	°C (TJ)
Package / Case	DO-204AL, DO-41, Axial	Through Hole
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the P4KE8.2 are qualified based on the following critical electrical and mechanical parameters:

Reverse standoff voltage within the P4KE8.2 series specification (7.02V nominal)
Voltage clamping performance at peak pulse current (12.1V to 12.71V range)
Peak pulse current capability (33.06A to 34A range)
Peak pulse power rating (400W)
Through-hole axial package format (DO-204AL / DO-41)
Operating temperature range compatibility (-55°C minimum, 150°C to 175°C maximum)
Unidirectional Zener diode topology
General-purpose application classification

All substitute parts maintain these core parameters within acceptable engineering tolerances for direct circuit substitution.

Parameter Comparison

Parameter	P4KE8.2 (Littelfuse)	P4KE8.2A (Taiwan Semiconductor)	P4KE8.2A-G (Comchip Technology)
Voltage - Reverse Standoff (Typ)	7.02V	7.02V	7V
Voltage - Breakdown (Min)	7.38V	7.79V	7.79V
Voltage - Clamping (Max) @ Ipp	12.71V	12.1V	12.1V
Current - Peak Pulse (10/1000µs)	33.9A	34A	33.06A
Power - Peak Pulse	400W	400W	400W
Operating Temperature Range	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 150°C
Package / Case	DO-204AL (DO-41)	DO-204AL (DO-41)	DO-41
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

P4KE8.2A (Taiwan Semiconductor Corporation) is the primary substitute for obsolete P4KE8.2 units. This part maintains identical reverse standoff voltage (7.02V), matching operating temperature range (-55°C to 175°C), and equivalent peak pulse power rating (400W). The part is in active production status with ROHS3 compliance and REACH unaffected certification. Packaging is supplied as Tape & Reel (TR) in DO-204AL (DO-41) format.

P4KE8.2A-G (Comchip Technology) serves as an alternative substitute with active product status and ROHS3 compliance. This part delivers equivalent clamping voltage (12.1V) and peak pulse power (400W) with marginally lower peak pulse current (33.06A versus 33.9A). The maximum operating temperature is reduced to 150°C compared to 175°C for the primary substitute. Packaging is supplied as Bulk in DO-41 format.

Both substitutes are electrically and mechanically compatible with the original P4KE8.2 for general-purpose transient voltage suppression applications in 6.6V nominal circuits.

Frequently Asked Questions (FAQ)

Q: Can P4KE8.2A and P4KE8.2A-G be used interchangeably with the original P4KE8.2?

A: Yes. Both substitute parts maintain the critical electrical parameters: reverse standoff voltage (7.02V nominal), peak pulse power (400W), and through-hole axial package format (DO-204AL / DO-41). Clamping voltage and peak pulse current remain within acceptable engineering tolerances for direct circuit substitution.

Q: What is the difference between P4KE8.2A and P4KE8.2A-G?

A: The primary differences are: (1) P4KE8.2A maintains the full operating temperature range (-55°C to 175°C), while P4KE8.2A-G is rated to 150°C maximum; (2) P4KE8.2A is supplied in Tape & Reel packaging, while P4KE8.2A-G is supplied in Bulk; (3) Peak pulse current is 34A for P4KE8.2A versus 33.06A for P4KE8.2A-G. Both parts deliver 400W peak pulse power and 12.1V clamping voltage.

Q: Why is the original P4KE8.2 obsolete?

A: The Littelfuse P4KE8.2 has reached end-of-life status. Active equivalent parts from Taiwan Semiconductor Corporation (P4KE8.2A) and Comchip Technology (P4KE8.2A-G) provide identical or superior electrical performance with current manufacturing support.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original P4KE8.2 and both substitute parts (P4KE8.2A and P4KE8.2A-G) are ROHS3 compliant.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tape & Reel versus Bulk) does not affect electrical performance. Both P4KE8.2A and P4KE8.2A-G deliver identical electrical specifications within their respective rated parameters. Packaging selection is determined by assembly process requirements and inventory management.

Q: What is the maximum operating temperature for each part?

A: P4KE8.2 (Littelfuse) and P4KE8.2A (Taiwan Semiconductor) are rated to 175°C junction temperature. P4KE8.2A-G (Comchip Technology) is rated to 150°C junction temperature. For applications requiring operation above 150°C, P4KE8.2A is the appropriate selection.

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