P4KE18A-B Equivalent & Substitute Parts

Part Overview

The P4KE18A-B is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This unidirectional zener diode operates with a reverse standoff voltage of 15.3V and provides peak pulse current handling of 16.1A with a maximum clamping voltage of 25.5V. The component is packaged in DO-204AL (DO-41) axial through-hole format and is ROHS3 compliant. Substitute parts are identified based on identical electrical performance parameters and compatible packaging specifications to support procurement flexibility and supply chain continuity.

Substiute Parts

P4KE18A-B

Littelfuse Inc.In Stock: 929P4KE18A-B Datasheet

Current PartRFQ

P4KE18A-TP

Micro Commercial CoIn Stock: 5832P4KE18A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE18A-B is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 15.3V
• Voltage - Breakdown (Min): 17.1V
• Voltage - Clamping (Max) @ Ipp: 25.5V
• Current - Peak Pulse (10/1000µs): 16.1A
• Power - Peak Pulse: 400W
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Type: Zener
• Unidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial

The P4KE18A-TP qualifies as a direct substitute based on identical electrical specifications and compatible through-hole axial packaging. Packaging format differences (Bulk versus Cut Tape) do not affect electrical performance or functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the P4KE18A-B and P4KE18A-TP are active products with identical electrical specifications and full regulatory compliance (ROHS3 and REACH). Selection between these parts should be based on packaging and procurement requirements. The P4KE18A-B is supplied in Bulk packaging, while the P4KE18A-TP is supplied in Cut Tape (CT) format. Both formats are suitable for through-hole assembly applications. Compliance certifications and product status are equivalent across both options.

Frequently Asked Questions (FAQ)

Q: Can P4KE18A-TP replace P4KE18A-B in existing designs?

A: Yes. Both parts are electrically identical with matching voltage ratings (15.3V reverse standoff, 25.5V clamping), current handling (16.1A peak pulse), and operating temperature ranges (-55°C to 175°C). Both use DO-41 axial through-hole packaging and are ROHS3 compliant.

Q: What is the difference between Bulk and Cut Tape packaging?

A: Bulk and Cut Tape are packaging formats that affect handling and assembly processes but do not impact electrical performance. Bulk packaging is typically used for manual assembly or smaller production runs, while Cut Tape is suited for automated pick-and-place assembly systems.

Q: Are there any compliance differences between these parts?

A: No. Both P4KE18A-B and P4KE18A-TP carry identical regulatory certifications: ROHS3 Compliant, REACH Unaffected, and EAR99 ECCN classification.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts have identical mechanical dimensions (DO-41 axial package) and electrical specifications, making them directly interchangeable in through-hole circuit designs.

Q: What applications are these TVS diodes suitable for?

A: These components are rated for general-purpose transient voltage suppression applications requiring 15.3V standoff voltage and 16.1A peak pulse current handling capacity.