P4KE16-B Equivalent & Substitute Parts

Part Overview

The P4KE16-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 13.6V reverse standoff voltage with a 23.63V maximum clamping voltage and 18.2A peak pulse current capability in a through-hole DO-204AL (DO-41) axial package. The P4KE16-B is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

P4KE16-B

Littelfuse Inc.In Stock: 834P4KE16-B Datasheet

Current PartRFQ

P4KE16A

Taiwan Semiconductor CorporationIn Stock: 966P4KE16A Datasheet

DirectRFQ

P4KE16A-B

Littelfuse Inc.In Stock: 1060P4KE16A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P4KE16-B is determined by strict alignment of electrical and mechanical parameters within the P4KE series. The critical substitution criteria are:

• Reverse standoff voltage: 13.6V (Typ)
• Clamping voltage range: 22.5V to 23.63V (Max @ Ipp)
• Peak pulse current: 18.2A to 18.6A
• Package: DO-204AL (DO-41) axial through-hole
• Operating temperature: -55°C to 175°C (TJ)
• RoHS3 compliance and MSL 1 rating

The substitute parts P4KE16A and P4KE16A-B meet these criteria with minor variations in clamping voltage (22.5V vs. 23.63V) and peak pulse current (18.6A and 18.2A respectively), while maintaining identical standoff voltage, package configuration, and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE16A and P4KE16A-B are active production alternatives to the obsolete P4KE16-B. Selection between these substitutes is based on product availability and manufacturer preference:

P4KE16A (Taiwan Semiconductor Corporation) is an active-status alternative with 22.5V clamping voltage and 18.6A peak pulse current, maintaining full electrical and thermal compatibility within the P4KE series specification envelope.

P4KE16A-B (Littelfuse Inc.) is an active-status alternative supplied in bulk packaging with 22.5V clamping voltage and 18.2A peak pulse current, offering continuity with the original manufacturer while meeting all compliance and thermal requirements.

Both substitutes maintain ROHS3 compliance, MSL 1 rating, and identical operating temperature range (-55°C to 175°C). The 1.13V reduction in maximum clamping voltage (from 23.63V to 22.5V) and minor current variations remain within acceptable tolerance for general-purpose transient voltage suppression applications within the P4KE series design envelope.

Frequently Asked Questions (FAQ)

Q: Can P4KE16A or P4KE16A-B be used as direct replacements for P4KE16-B?

A: Yes. Both substitute parts maintain the same reverse standoff voltage (13.6V), package configuration (DO-204AL axial through-hole), peak pulse power (400W), and operating temperature range (-55°C to 175°C). The clamping voltage difference (22.5V vs. 23.63V) and peak pulse current variations fall within the P4KE series electrical specification tolerance for general-purpose applications.

Q: What is the difference between P4KE16A and P4KE16A-B?

A: Both parts are electrically identical with 13.6V standoff voltage, 22.5V clamping voltage, and 400W peak pulse power. The primary differences are manufacturer (Taiwan Semiconductor Corporation vs. Littelfuse Inc.) and packaging format (standard vs. bulk). P4KE16A-B is supplied in bulk packaging by Littelfuse Inc., the original P4KE16-B manufacturer.

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

A: No. All three parts (P4KE16-B, P4KE16A, and P4KE16A-B) are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating. Both substitutes maintain full regulatory compliance for the P4KE series.

Q: Does the package type remain the same across all three parts?

A: Yes. All parts use the DO-204AL (DO-41) axial through-hole package, ensuring mechanical and electrical compatibility in existing PCB designs without layout modifications.

Q: What is the significance of the product status change from Obsolete to Active?

A: The P4KE16-B is classified as obsolete, meaning Littelfuse Inc. no longer manufactures this specific variant. The P4KE16A and P4KE16A-B are active production parts, ensuring long-term availability and supply chain continuity for new designs and production runs.