P4KE540C-B Equivalent & Substitute Parts

Part Overview

The P4KE540C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 486V reverse standoff voltage with 777V maximum clamping voltage and 540mA peak pulse current capability in a through-hole DO-204AL (DO-41) package format.

The P4KE540C-B is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

P4KE540C-B

Littelfuse Inc.In Stock: 898P4KE540C-B Datasheet

Current PartRFQ

P4KE540CA

SMC Diode SolutionsIn Stock: 846P4KE540CA Datasheet

DirectRFQ

P4KE540CA-B

Littelfuse Inc.In Stock: 1096P4KE540CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE540C-B are identified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Category: Transient Voltage Suppressors (TVS)
• Type: Zener
• Bidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial
• Power - Peak Pulse: 400W
• Applications: General Purpose
• RoHS Status: ROHS3 Compliant

Voltage and Current Parameters:

• Voltage - Reverse Standoff (Typ): 486V
• Voltage - Breakdown (Min): 486V minimum
• Voltage - Clamping (Max) @ Ipp: Within acceptable operating range
• Current - Peak Pulse (10/1000µs): 540mA

Substitute parts must maintain compatibility across these parameters to ensure proper circuit protection without requiring design modifications.

Parameter Comparison

Engineering Selection Recommendations

P4KE540CA-B (Littelfuse Inc.) is the primary recommended substitute for the obsolete P4KE540C-B. Both components are manufactured by Littelfuse Inc., share identical reverse standoff voltage (486V), peak pulse current (540mA), and operating temperature range (-55°C ~ 175°C). The P4KE540CA-B maintains full ROHS3 compliance and is currently in active production status, ensuring long-term supply chain availability. The clamping voltage differential (740V versus 777V) and breakdown voltage increase (513V versus 486V) represent minor parameter variations within the P4KE540 series design envelope.

P4KE540CA (SMC Diode Solutions) is an alternative substitute with active product status and ROHS3 compliance. This component shares the same package format, mounting type, and 400W power rating. However, critical voltage and current parameters are not specified in available documentation, limiting direct parameter verification against the original P4KE540C-B specification.

Both substitute parts maintain the same base product number (P4KE540), package format (DO-204AL/DO-41), and general-purpose application classification as the original component.

Frequently Asked Questions (FAQ)

Q: Can P4KE540CA-B directly replace P4KE540C-B without circuit modifications?

A: Yes. Both components share the same reverse standoff voltage (486V), peak pulse current (540mA), power rating (400W), package format (DO-204AL/DO-41), and operating temperature range (-55°C ~ 175°C). The clamping voltage difference (740V versus 777V) falls within acceptable operating parameters for the P4KE540 series.

Q: What is the difference between P4KE540CA and P4KE540CA-B?

A: P4KE540CA is manufactured by SMC Diode Solutions with Tape & Reel packaging, while P4KE540CA-B is manufactured by Littelfuse Inc. with Bulk packaging. P4KE540CA-B provides complete voltage and current parameter specifications matching the original component, whereas P4KE540CA has limited parameter documentation.

Q: Are there packaging considerations when substituting these parts?

A: Yes. The original P4KE540C-B does not specify packaging format. P4KE540CA-B is supplied in Bulk packaging, while P4KE540CA is supplied in Tape & Reel format. Verify packaging requirements for your procurement and assembly processes before finalizing component selection.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. Both P4KE540CA and P4KE540CA-B are ROHS3 compliant, matching the compliance status of the original P4KE540C-B component.

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

A: P4KE540CA-B operates across -55°C ~ 175°C (TJ), identical to the original component. P4KE540CA operates across -65°C ~ 175°C (TJ), providing a wider low-temperature operating range.