Equivalent & Substitute Parts for 3KP36A-B TVS Diode

Part Overview

The 3KP36A-B is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 36V reverse standoff voltage with a 58.1V maximum clamping voltage and 51.6A peak pulse current capability in a through-hole P600 axial package. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

3KP36A-B

LittelfuseIn Stock: 7473KP36A-B Datasheet

Current PartRFQ

5KP36A-B

Littelfuse Inc.In Stock: 11725KP36A-B Datasheet

DirectRFQ

3KP36A-TP

Micro Commercial CoIn Stock: 11093KP36A-TP Datasheet

MFR RecommendedRFQ

5KP36A-TP

Micro Commercial CoIn Stock: 26415KP36A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3KP36A-B is determined by the following critical parameters:

• Voltage - Reverse Standoff: 36V (exact match required)
• Voltage - Clamping (Max) @ Ipp: 58.1V (exact match required)
• Type: Zener, unidirectional configuration
• Operating Temperature Range: -55°C ~ 175°C minimum
• Mounting Type: Through Hole, axial package format
• RoHS3 Compliance: Required for regulatory alignment

The substitute parts identified maintain identical voltage specifications and thermal operating range. Variations in peak pulse current and power dissipation ratings are acceptable provided the substitute meets or exceeds the original specification. Package variants (P600 vs. R-6) and packaging formats (Bulk, Tape & Reel, Cut Tape) represent equivalent mechanical and electrical configurations suitable for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

5KP36A-B (Littelfuse) — Direct electrical equivalent with enhanced power dissipation (5000W vs. 3000W) and higher peak pulse current (87.8A vs. 51.6A). Maintains P600 axial package format. Active product status ensures long-term availability and supply chain continuity. Recommended for applications requiring higher transient energy absorption.

3KP36A-TP (Micro Commercial Co) — Electrical equivalent with matching 3000W power rating and P600-equivalent R-6 axial package. Tape & Reel packaging format. Active product status. Suitable for direct replacement in existing designs with identical power requirements.

5KP36A-TP (Micro Commercial Co) — Electrical equivalent with 5000W power rating and R-6 axial package. Cut Tape packaging format. Active product status. Provides enhanced transient protection capability with alternative packaging configuration.

All substitute parts maintain identical voltage specifications (36V standoff, 58.1V clamping), thermal operating range (-55°C to 175°C), and RoHS3 compliance. Selection between substitutes depends on packaging format requirements and available inventory.

Frequently Asked Questions (FAQ)

Q: Can 5KP36A-B replace 3KP36A-B in all applications?

A: Yes, from an electrical standpoint. The 5KP36A-B maintains identical voltage parameters (36V standoff, 58.1V clamping) and operating temperature range. The higher power rating (5000W vs. 3000W) and peak pulse current (87.8A vs. 51.6A) provide enhanced transient suppression capability. The P600 axial package is mechanically identical.

Q: What is the difference between P600 and R-6 packages?

A: Both are through-hole axial package formats for TVS diodes. P600 and R-6 represent equivalent mechanical configurations suitable for PCB mounting. Selection depends on component footprint requirements and available inventory.

Q: Are 3KP36A-TP and 5KP36A-TP interchangeable with the original 3KP36A-B?

A: Yes, both maintain the required 36V standoff and 58.1V clamping voltages. The 3KP36A-TP provides equivalent power handling (3000W), while 5KP36A-TP offers enhanced protection (5000W). The R-6 package is mechanically compatible with P600 footprints. Packaging format (Tape & Reel vs. Bulk) affects procurement and assembly processes only.

Q: Why is the 3KP36A-B listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Littelfuse. Active equivalent parts (5KP36A-B, 3KP36A-TP, 5KP36A-TP) provide identical electrical performance with assured long-term availability.

Q: Do all substitutes meet RoHS3 compliance?

A: Yes. All listed substitute parts carry ROHS3 Compliant certification, matching the original 3KP36A-B specification.