P4KE510-B Equivalent & Substitute Parts

Part Overview

The P4KE510-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This unidirectional zener diode operates in the 434V reverse standoff voltage range with a maximum clamping voltage of 732.9V at peak pulse current. The component is packaged in a through-hole DO-204AL (DO-41) axial configuration and is rated for 400W peak pulse power dissipation across an operating temperature range of -55°C to 175°C.

The P4KE510-B is currently classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

P4KE510-B

Littelfuse Inc.In Stock: 997P4KE510-B Datasheet

Current PartRFQ

P4KE510A

SMC Diode SolutionsIn Stock: 1010P4KE510A Datasheet

DirectRFQ

P4KE510A-B

Littelfuse Inc.In Stock: 984P4KE510A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE510-B are identified based on strict alignment with the following critical parameters:

• Unidirectional Channels: Must equal 1
• Type: Must be Zener
• Mounting Type: Must be Through Hole
• Package / Case: Must support DO-204AL, DO-41, or Axial configurations
• Power - Peak Pulse: Must equal or exceed 400W
• Current - Peak Pulse (10/1000µs): Must equal or exceed 570mA
• Voltage - Reverse Standoff (Typ): Must equal 434V (where specified)
• Voltage - Clamping (Max) @ Ipp: Must be within acceptable operating range
• RoHS Status: Must maintain ROHS3 Compliance

The identified substitute parts meet these criteria and are suitable for direct replacement in applications requiring the P4KE510-B electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

P4KE510A-B is the primary substitute for the P4KE510-B. Both components are manufactured by Littelfuse Inc., share identical reverse standoff voltage (434V), peak pulse current (570mA), and operating temperature range (-55°C to 175°C). The P4KE510A-B maintains ROHS3 compliance and is currently in active production status, ensuring long-term availability. The clamping voltage of 698V is lower than the original 732.9V but remains within the functional operating envelope for general-purpose transient suppression applications.

P4KE510A (SMC Diode Solutions) is an alternative substitute that meets the core mechanical and power requirements (400W peak pulse, through-hole DO-41 package, ROHS3 compliant). However, critical electrical parameters including reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current are not specified in available documentation. Selection of this part requires verification against complete manufacturer datasheets to confirm compatibility with the original design specifications.

Frequently Asked Questions (FAQ)

Q: Can P4KE510A-B be used as a direct replacement for P4KE510-B?

A: Yes. Both parts share the same reverse standoff voltage (434V), peak pulse current (570mA), power rating (400W), operating temperature range (-55°C to 175°C), and package configuration (DO-204AL/DO-41 through-hole). The clamping voltage difference (698V vs. 732.9V) is within acceptable tolerance for general-purpose overvoltage protection circuits.

Q: What is the difference between P4KE510A and P4KE510A-B?

A: P4KE510A is manufactured by SMC Diode Solutions with incomplete electrical parameter documentation. P4KE510A-B is manufactured by Littelfuse Inc. with fully specified electrical characteristics matching the original P4KE510-B design parameters. P4KE510A-B is the recommended substitute.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both P4KE510A and P4KE510A-B maintain ROHS3 compliance, matching the environmental and regulatory status of the original P4KE510-B component.

Q: Does the operating temperature range differ between substitutes?

A: P4KE510A-B matches the original range (-55°C to 175°C). P4KE510A extends the lower temperature limit to -65°C, providing a wider operating envelope without compromising upper temperature performance.

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

A: Yes. All substitute parts use identical through-hole DO-204AL (DO-41) axial packaging, allowing direct PCB footprint compatibility without layout modifications.