P6KE6.8-B Equivalent & Substitute Parts

Part Overview

The P6KE6.8-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 5.8V reverse standoff voltage and 11.03V maximum clamping voltage in a through-hole DO-204AC (DO-15) axial package. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

P6KE6.8-B

Littelfuse Inc.In Stock: 660P6KE6.8-B Datasheet

Current PartRFQ

P6KE6.8A

HY Electronic (Cayman) LimitedIn Stock: 20314P6KE6.8A Datasheet

DirectRFQ

P6KE6.8A-B

Littelfuse Inc.In Stock: 1192P6KE6.8A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6KE6.8-B are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Reverse Standoff Voltage (Typ): 5.8V
• Unidirectional channel configuration: 1 channel
• Power - Peak Pulse rating: 600W
• Package / Case: DO-204AC, DO-15, Axial (through-hole)
• Series classification: P6KE

Acceptable Variation Parameters:

• Voltage - Breakdown (Min): Range 6.12V to 6.45V
• Voltage - Clamping (Max) @ Ipp: Range 10.5V to 11.03V
• Current - Peak Pulse (10/1000µs): Specified where available
• Operating Temperature Range: Minimum -55°C to 150°C or higher

The identified substitute parts P6KE6.8A and P6KE6.8A-B maintain identical reverse standoff voltage, power rating, package configuration, and series designation. Variations in clamping voltage and peak pulse current remain within acceptable engineering tolerances for general-purpose transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

P6KE6.8A-B (Littelfuse Inc.) is the primary recommended substitute. This part maintains manufacturer continuity with the original P6KE6.8-B, shares identical operating temperature range (-55°C ~ 175°C), and carries active product status. The clamping voltage of 10.5V is lower than the original 11.03V specification, providing enhanced transient suppression performance. ROHS3 compliance and REACH Unaffected status confirm regulatory alignment.

P6KE6.8A (HY Electronic) serves as a secondary alternative. This part is actively manufactured and maintains all critical electrical parameters including 5.8V reverse standoff voltage and 600W power rating. The operating temperature range is limited to -55°C ~ 150°C, which may restrict use in applications requiring the full 175°C upper thermal limit. ROHS3 compliance is confirmed.

Both substitute parts are qualified for direct replacement in general-purpose transient voltage suppression circuits where the P6KE6.8-B is currently specified.

Frequently Asked Questions (FAQ)

Q: Can P6KE6.8A and P6KE6.8A-B be used interchangeably with P6KE6.8-B?

A: Both parts are functionally equivalent for general-purpose TVS applications. The primary consideration is operating temperature range. P6KE6.8A-B maintains the full -55°C ~ 175°C range of the original part, while P6KE6.8A is limited to -55°C ~ 150°C. Select based on your application's thermal requirements.

Q: What is the significance of the lower clamping voltage in the substitute parts?

A: The substitute parts feature a maximum clamping voltage of 10.5V compared to the original 11.03V. This represents improved transient suppression performance, as the lower clamping voltage provides faster voltage regulation during transient events. This is a beneficial characteristic for circuit protection.

Q: Are the substitute parts available in the same package configuration?

A: Yes. All three parts use the DO-204AC (DO-15) axial through-hole package, ensuring mechanical and electrical compatibility in existing PCB layouts and circuit designs.

Q: What compliance certifications apply to these substitute parts?

A: All parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. P6KE6.8A-B additionally carries REACH Unaffected status, confirming full regulatory compliance for industrial and commercial applications.

Q: Why is the original P6KE6.8-B classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Littelfuse Inc. The substitute parts P6KE6.8A and P6KE6.8A-B represent the current active alternatives within the P6KE series, offering equivalent or improved performance characteristics.