P6KE22-B Equivalent & Substitute Parts

Part Overview

The P6KE22-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This unidirectional Zener diode operates with an 18.8V reverse standoff voltage and provides 600W peak pulse power dissipation in a through-hole DO-204AC (DO-15) axial package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

P6KE22-B

Littelfuse Inc.In Stock: 834P6KE22-B Datasheet

Current PartRFQ

P6KE22A

Fairchild SemiconductorIn Stock: 28202P6KE22A Datasheet

DirectRFQ

P6KE22A-B

Littelfuse Inc.In Stock: 715P6KE22A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6KE22-B is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 18.8V (exact match required)
• Voltage - Clamping (Max) @ Ipp: within acceptable range for circuit protection
• Power - Peak Pulse: 600W (minimum requirement)
• Unidirectional Channels: 1 (single channel configuration)
• Package / Case: DO-204AC, DO-15, Axial (through-hole form factor)
• Type: Zener (TVS diode classification)

The identified substitute parts maintain the core voltage standoff specification and power dissipation capability while offering improved product availability and active manufacturing status. Both substitute parts operate within the same thermal range and maintain identical packaging specifications.

Parameter Comparison

Engineering Selection Recommendations

P6KE22A-B (Littelfuse Inc.) - Primary Substitute: This part is the recommended direct replacement for the obsolete P6KE22-B. It maintains identical reverse standoff voltage (18.8V), equivalent power dissipation (600W), and identical operating temperature range (-55°C ~ 175°C). The part is actively manufactured and ROHS3 compliant. The clamping voltage is reduced to 30.6V, providing improved transient suppression performance. This part is available in active production status with 628 units in stock.

P6KE22A (Fairchild Semiconductor) - Secondary Substitute: This part provides functional equivalence with matching reverse standoff voltage (18.8V) and power dissipation (600W). The clamping voltage specification is identical to the P6KE22A-B at 30.6V. The operating temperature range extends to -50°C minimum (versus -55°C for the primary substitute). This part is actively manufactured and available with 28,100 units in stock, offering superior supply availability. Compliance certifications beyond ROHS status are not specified in the provided data.

Both substitute parts are suitable for direct replacement in applications where the P6KE22-B was originally specified, with the understanding that the lower clamping voltage represents an improvement in transient suppression capability.

Frequently Asked Questions (FAQ)

Q: Can P6KE22A-B be used as a direct replacement for P6KE22-B? A: Yes. Both parts share identical reverse standoff voltage (18.8V), power dissipation (600W), and package configuration (DO-204AC through-hole). The P6KE22A-B is actively manufactured and ROHS3 compliant, making it the primary substitute for the obsolete P6KE22-B.

Q: What is the difference between P6KE22A and P6KE22A-B? A: P6KE22A is manufactured by Fairchild Semiconductor, while P6KE22A-B is manufactured by Littelfuse Inc. Both maintain identical electrical specifications for reverse standoff voltage and clamping voltage. The primary difference is manufacturer and supply availability. P6KE22A-B includes ROHS3 compliance certification.

Q: Are there any thermal operating range differences between the substitutes? A: P6KE22-B and P6KE22A-B both operate from -55°C to 175°C. P6KE22A (Fairchild) has a minimum operating temperature of -50°C. For applications requiring operation below -50°C, P6KE22A-B is the appropriate selection.

Q: Does the reduced clamping voltage in the substitute parts affect circuit compatibility? A: The substitute parts feature a clamping voltage of 30.6V compared to 32.13V in the original P6KE22-B. This represents improved transient suppression performance and is compatible with circuits designed for the original part, as the lower clamping voltage provides enhanced 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 designs without modification.

Q: Which substitute part should be selected for new designs? A: For new designs, P6KE22A-B is recommended due to active manufacturing status, ROHS3 compliance, and availability. P6KE22A serves as an alternative with superior supply availability if required.