P4KE20C-B Equivalent & Substitute Parts

Part Overview

The P4KE20C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 17.1V reverse standoff voltage with a 29.09V maximum clamping voltage and 14.8A peak pulse current capability in a through-hole DO-204AL (DO-41) package. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

P4KE20C-B

Littelfuse Inc.In Stock: 827P4KE20C-B Datasheet

Current PartRFQ

P4KE20CA

Taiwan Semiconductor CorporationIn Stock: 1199P4KE20CA Datasheet

DirectRFQ

P4KE20CA-B

Littelfuse Inc.In Stock: 1034P4KE20CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE20C-B are qualified based on the following critical parameters that determine functional equivalence:

• Voltage - Reverse Standoff (Typ): 17.1V
• Voltage - Breakdown (Min): 18V or higher
• Voltage - Clamping (Max) @ Ipp: Must not exceed 29.09V
• Current - Peak Pulse (10/1000µs): 14.8A or higher
• Power - Peak Pulse: 400W
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Package / Case: DO-204AL, DO-41, Axial
• Mounting Type: Through Hole
• Type: Zener
• Bidirectional Channels: 1

The identified substitute parts maintain compatibility across all specified electrical and mechanical parameters while offering improved product status and availability.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE20CA-B and P4KE20CA are qualified substitutes for the obsolete P4KE20C-B. Selection between these alternatives is based on the following factors:

P4KE20CA-B (Littelfuse Inc.): This part maintains the original manufacturer lineage while offering active product status. It is supplied in bulk packaging and provides equivalent electrical performance with a lower clamping voltage (27.7V versus 29.09V), which represents improved transient suppression characteristics. RoHS3 compliance and REACH unaffected status confirm regulatory alignment.

P4KE20CA (Taiwan Semiconductor Corporation): This alternative offers the same electrical specifications as P4KE20CA-B with marginally higher peak pulse current capability (15A versus 14.8A). It maintains identical thermal and compliance ratings. Higher inventory availability (1150 pcs) supports supply chain continuity.

Both substitutes satisfy all critical electrical parameters, thermal operating ranges, and mechanical compatibility requirements. Selection should be based on procurement preferences, supply chain considerations, and packaging requirements.

Frequently Asked Questions (FAQ)

Q: Can P4KE20CA-B or P4KE20CA be used as direct replacements for P4KE20C-B?

A: Yes. Both parts maintain identical reverse standoff voltage (17.1V), operating temperature range (-55°C ~ 175°C), package type (DO-204AL), and mounting configuration (through-hole). The clamping voltage of the substitutes (27.7V) is lower than the original (29.09V), providing enhanced overvoltage protection margins.

Q: What is the difference between P4KE20CA-B and P4KE20CA?

A: Both parts are electrically equivalent with identical reverse standoff voltage, breakdown voltage, and clamping characteristics. P4KE20CA-B is supplied by Littelfuse Inc. in bulk packaging, while P4KE20CA is supplied by Taiwan Semiconductor Corporation. Peak pulse current differs marginally (14.8A versus 15A). Both maintain active product status and full regulatory compliance.

Q: Are there any thermal or compliance differences between these parts?

A: No. All three parts operate across the identical temperature range (-55°C ~ 175°C) and maintain RoHS3 compliance with MSL rating of 1 (Unlimited). Both substitutes carry REACH unaffected status, confirming regulatory equivalence.

Q: Does the lower clamping voltage of the substitutes affect circuit compatibility?

A: The lower clamping voltage (27.7V versus 29.09V) of the substitute parts represents improved transient suppression performance. This characteristic is compatible with all applications designed for the original P4KE20C-B, as it provides tighter voltage regulation during transient events.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. All three parts share identical DO-204AL package dimensions and through-hole mounting configuration, enabling direct PCB footprint compatibility without design modifications.