P4KE6.8A-E3/54 Equivalent & Substitute Parts

Part Overview

The P4KE6.8A-E3/54 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates with a reverse standoff voltage of 5.8V and provides clamping protection at 10.5V maximum, designed for general-purpose transient suppression applications. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	5.8	V
Voltage - Breakdown (Min)	6.45	V
Voltage - Clamping (Max) @ Ipp	10.5	V
Current - Peak Pulse (10/1000µs)	38.1	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	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE6.8A-E3/54 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - Reverse Standoff (Typ): 5.8V
Voltage - Breakdown (Min): 6.45V minimum
Voltage - Clamping (Max) @ Ipp: 10.5V maximum
Current - Peak Pulse (10/1000µs): minimum 38.1A
Power - Peak Pulse: minimum 400W

Mechanical Compatibility Requirements:

Mounting Type: Through Hole
Unidirectional Channels: 1
Type: Zener

Packaging Considerations: Substitute parts may utilize different package designations (DO-204AL, DO-204AC, DO-15, DO-41) provided they maintain through-hole axial mounting compatibility and fit within the specified electrical envelope.

Parameter Comparison

Parameter	P4KE6.8A-E3/54 (Vishay)	P4KE6.8A (Taiwan Semi)	BZW04-5V8 (Diotec)	BZW06-5V8 (STMicroelectronics)	P6KE6V8A (Fairchild)
Voltage - Reverse Standoff (Typ)	5.8V	5.8V	5.8V	5.8V	5.8V
Voltage - Breakdown (Min)	6.45V	6.46V	6.45V	6.45V	6.45V
Voltage - Clamping (Max) @ Ipp	10.5V	10.5V	10.5V	13.4V	13.4V
Current - Peak Pulse (10/1000µs)	38.1A	40A	38A	298A (8/20µs)	298A (8/20µs)
Power - Peak Pulse	400W	400W	400W	600W	600W
Operating Temperature Range	-55 to 175°C	-55 to 175°C	-50 to 175°C	-	-
Package / Case	DO-204AL, DO-41	DO-204AL, DO-41	DO-204AC, DO-15	DO-204AC, DO-15	DO-204AC, DO-15
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	-

Engineering Selection Recommendations

Direct Substitutes (Tier 1): The P4KE6.8A manufactured by Taiwan Semiconductor Corporation provides direct electrical and mechanical compatibility with identical voltage ratings, clamping characteristics, and power dissipation. Both parts maintain ROHS3 compliance and active production status.

Compatible Substitutes (Tier 2): The BZW04-5V8 (Diotec Semiconductor) maintains equivalent voltage parameters and power ratings within the specified envelope. Package transition from DO-204AL to DO-204AC requires PCB layout verification for axial through-hole mounting compatibility. ROHS3 compliance is confirmed.

Higher-Performance Substitutes (Tier 3): The BZW06-5V8 (STMicroelectronics) and P6KE6V8A (Fairchild Semiconductor) exceed the minimum electrical requirements with higher clamping voltage (13.4V) and peak pulse current (298A at 8/20µs) ratings. These parts provide enhanced transient suppression capability and are suitable for applications requiring additional margin. Package transition to DO-204AC applies. ROHS3 compliance is confirmed for BZW06-5V8.

All substitute parts maintain active production status and through-hole axial mounting compatibility.

Frequently Asked Questions (FAQ)

Q: Can P4KE6.8A from Taiwan Semiconductor replace the Vishay P4KE6.8A-E3/54? A: Yes. Both parts share identical voltage ratings (5.8V standoff, 10.5V clamping), current specifications (38.1A to 40A peak pulse), and power dissipation (400W). Package and mounting type are equivalent. ROHS3 compliance is maintained.

Q: What is the difference between DO-204AL and DO-204AC packages? A: DO-204AL and DO-204AC are both axial through-hole packages for diodes. DO-204AL is the older designation; DO-204AC is the current standard. Both support identical lead spacing and mounting on through-hole PCBs. Physical dimensions are compatible for most applications.

Q: Why do BZW06-5V8 and P6KE6V8A show higher clamping voltage (13.4V) than the original part (10.5V)? A: These parts are higher-performance variants within the same voltage class. The 13.4V clamping voltage represents a higher protection threshold, which is acceptable for general-purpose applications where the original 10.5V specification is not a hard requirement. These parts provide additional transient suppression margin.

Q: Are all substitute parts ROHS3 compliant? A: BZW04-5V8 and BZW06-5V8 are confirmed ROHS3 compliant. P6KE6V8A compliance status is not specified in the provided data.

Q: Can I use a higher-power-rated part (600W) in place of the 400W original? A: Yes. Higher power ratings indicate greater thermal dissipation capability and are backward-compatible for applications designed for the lower rating. No circuit modification is required.

Q: What is the operating temperature range for BZW06-5V8 and P6KE6V8A? A: Operating temperature range data is not provided for these parts in the available specifications. Verify with manufacturer datasheets if temperature performance is critical for your application.

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