P6KE6.8A-T-F Equivalent & Substitute Parts

Part Overview

The P6KE6.8A-T-F is a unidirectional transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in through-hole applications. This component features a 5.8V reverse standoff voltage, 10.5V maximum clamping voltage, and 57A peak pulse current capability in a DO-15 axial package. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	P6KE6.8A-T-F
Manufacturer	Diodes Incorporated
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	5.8V
Voltage - Breakdown (Min)	6.45V
Voltage - Clamping (Max) @ Ipp	10.5V
Current - Peak Pulse (10/1000µs)	57A
Power - Peak Pulse	600W
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Operating Temperature	-55°C ~ 175°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution for the P6KE6.8A-T-F is determined by the following critical electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 5.8V
Voltage - Breakdown (Min): 6.45V
Voltage - Clamping (Max) @ Ipp: 10.5V or higher
Current - Peak Pulse (10/1000µs): 57A or higher
Power - Peak Pulse: 600W
Mounting Type: Through Hole
Package / Case: DO-15 (DO-204AC) Axial
Type: Zener, Unidirectional
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into three categories based on their relationship to the original specification:

Direct Substitutes maintain identical electrical performance and packaging, differing only in manufacturer or packaging format (tape vs. bulk).

Upgrade Substitutes provide enhanced performance characteristics (higher clamping voltage and peak pulse current) while maintaining the same reverse standoff voltage and package type, suitable for applications requiring improved transient protection.

Manufacturer-Recommended Substitutes are approved alternatives that meet the core voltage and current requirements, with variations in peak pulse current or clamping voltage within acceptable ranges for general-purpose protection applications.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package	Product Status	RoHS Status
P6KE6.8A-T-F	Diodes Incorporated	5.8V	6.45V	10.5V	57A	600W	DO-15	Discontinued	ROHS3 Compliant
P6KE6.8A-TP	Micro Commercial Co	5.8V	6.45V	10.5V	57A	600W	DO-15	Active	ROHS3 Compliant
P6KE6V8A	Fairchild Semiconductor	5.8V	6.45V	13.4V	298A (8/20µs)	600W	DO-15	Active	Not specified
BZW04-5V8	Diotec Semiconductor	5.8V	6.45V	10.5V	38A	400W	DO-15	Active	ROHS3 Compliant
BZW06-5V8	STMicroelectronics	5.8V	6.45V	13.4V	298A (8/20µs)	600W	DO-15	Active	ROHS3 Compliant
P6KE6.8A	HY Electronic (Cayman) Limited	5.8V	6.45V	10.5V	57A	600W	DO-15	Active	ROHS3 Compliant
P6KE6.8A-B	Littelfuse Inc.	5.8V	6.45V	10.5V	58.1A	600W	DO-15	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Performance): Select P6KE6.8A-TP (Micro Commercial Co), P6KE6.8A (HY Electronic), or P6KE6.8A-B (Littelfuse Inc.). All three maintain the original 5.8V reverse standoff, 10.5V clamping voltage, and 57A peak pulse current. All are ROHS3 compliant and currently in active production status. P6KE6.8A-TP offers the highest inventory availability (2451 pcs) in cut tape packaging. P6KE6.8A-B provides bulk packaging with extended operating temperature range to 175°C.

For Enhanced Protection (Upgrade Performance): Select P6KE6V8A (Fairchild Semiconductor) or BZW06-5V8 (STMicroelectronics). Both provide 13.4V clamping voltage and 298A peak pulse current (8/20µs), delivering superior transient suppression while maintaining the 5.8V reverse standoff voltage. Both are ROHS3 compliant and active. BZW06-5V8 offers higher inventory (7452 pcs) and includes capacitance specification (4000pF @ 1MHz).

For Cost-Optimized Alternative: Select BZW04-5V8 (Diotec Semiconductor) if peak pulse current reduction from 57A to 38A is acceptable for the application. This part maintains 10.5V clamping voltage and 5.8V reverse standoff, with 45100 pcs available inventory. Power rating reduces to 400W. ROHS3 compliant and active status.

All recommended substitutes are through-hole mounted in DO-15 axial packages, compatible with existing PCB layouts designed for the P6KE6.8A-T-F.

Frequently Asked Questions (FAQ)

Q: Can P6KE6.8A-TP directly replace P6KE6.8A-T-F without circuit modification?

A: Yes. P6KE6.8A-TP is electrically and mechanically identical, with matching 5.8V reverse standoff, 10.5V clamping voltage, 57A peak pulse current, and DO-15 axial package. The only difference is packaging format (cut tape vs. tube). No circuit changes are required.

Q: What is the difference between the 10.5V clamping and 13.4V clamping variants?

A: The 10.5V clamping variants (P6KE6.8A series, BZW04-5V8) limit transient voltage to 10.5V maximum. The 13.4V clamping variants (P6KE6V8A, BZW06-5V8) allow higher transient peaks up to 13.4V before clamping. Both maintain the same 5.8V reverse standoff voltage. Selection depends on circuit tolerance for transient overvoltage.

Q: Why does BZW04-5V8 have lower peak pulse current (38A vs. 57A)?

A: BZW04-5V8 is rated for 38A peak pulse current with 400W power dissipation, compared to 57A and 600W for the original part. This represents a lower energy handling capability. Use BZW04-5V8 only if the application's transient energy is confirmed to be within 38A and 400W limits.

Q: Are all substitute parts ROHS3 compliant?

A: P6KE6.8A-TP, BZW04-5V8, BZW06-5V8, P6KE6.8A, and P6KE6.8A-B are all ROHS3 compliant. P6KE6V8A (Fairchild Semiconductor) does not specify RoHS status in available documentation.

Q: Can I use P6KE6V8A or BZW06-5V8 as a direct drop-in replacement?

A: Yes, mechanically and electrically. Both fit the DO-15 axial package and maintain 5.8V reverse standoff voltage. However, the higher 13.4V clamping voltage means transient peaks will reach higher levels before suppression. Verify the circuit can tolerate this higher clamping voltage before substitution.

Q: What is the operating temperature range for each substitute?

A: P6KE6.8A-T-F, P6KE6.8A-TP, and P6KE6.8A-B operate from -55°C to 175°C. P6KE6.8A operates from -55°C to 150°C. BZW04-5V8 operates from -50°C to 175°C. P6KE6V8A and BZW06-5V8 do not specify operating temperature in available data. Confirm temperature requirements for your application.

Q: Which substitute has the highest inventory availability?

A: BZW04-5V8 (Diotec Semiconductor) has the highest inventory at 45100 pcs. P6KE6V8A (Fairchild Semiconductor) has 19200 pcs. P6KE6.8A-TP has 2451 pcs. Inventory levels are subject to change and should be verified with suppliers.

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