3KP36CA-B Equivalent & Substitute Parts

Part Overview

The 3KP36CA-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This bidirectional zener diode 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 identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP36CA-B

Littelfuse Inc.In Stock: 10723KP36CA-B Datasheet

Current PartRFQ

5KP36CA-B

Littelfuse Inc.In Stock: 50205KP36CA-B Datasheet

DirectRFQ

15KP36CA-TP

Micro Commercial CoIn Stock: 413415KP36CA-TP Datasheet

MFR RecommendedRFQ

3KP36CA-TP

Micro Commercial CoIn Stock: 6703KP36CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP36CA-B are qualified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 36V
• Voltage - Breakdown (Min): 40V
• Voltage - Clamping (Max) @ Ipp: 58.1V (or within acceptable tolerance)
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Type: Zener, Bidirectional

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: Axial configuration (P600 or R-6)

Regulatory Compliance:

• RoHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitute parts identified maintain electrical equivalence in voltage regulation characteristics while offering either equivalent or enhanced power dissipation capabilities. Package variations (P600 to R-6) are acceptable as both are through-hole axial configurations suitable for the same circuit board layouts.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 5KP36CA-B (Littelfuse Inc.)

The 5KP36CA-B is the direct active-production equivalent from the original manufacturer. It maintains identical voltage specifications (36V standoff, 40V breakdown, 58.1V clamping) and operating temperature range while offering enhanced peak pulse current (87.8A) and power dissipation (5000W). This part is currently in active production status with robust inventory availability, making it the preferred choice for direct replacement in new designs and legacy system support.

Secondary Substitute: 3KP36CA-TP (Micro Commercial Co)

The 3KP36CA-TP provides electrical equivalence with identical voltage and current specifications (36V standoff, 58.1V clamping, 51.6A peak pulse, 3000W power). This part is manufactured by Micro Commercial Co and is in active production. The package configuration differs (R-6 axial versus P600 axial), but both are through-hole axial formats compatible with standard circuit board layouts. This option is suitable when Littelfuse supply is constrained.

Tertiary Substitute: 15KP36CA-TP (Micro Commercial Co)

The 15KP36CA-TP maintains voltage equivalence (36V standoff, 40V breakdown, 59.7V clamping) with significantly enhanced power dissipation capability (15000W). This part is appropriate for applications requiring higher transient energy absorption. The R-6 axial package is compatible with through-hole mounting. Peak pulse current data is not provided for this part. This option is suitable for designs with elevated transient stress requirements.

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring regulatory and environmental compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can the 5KP36CA-B directly replace the 3KP36CA-B in existing designs?

A: Yes. The 5KP36CA-B is electrically equivalent with identical voltage specifications and operating temperature range. The enhanced current and power ratings provide equal or superior performance. No circuit modifications are required.

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

A: Both P600 and R-6 are through-hole axial package formats for TVS diodes. The primary difference is physical size and lead configuration. Both are suitable for standard through-hole circuit board assembly. Verify PCB footprint compatibility before substitution.

Q: Why is the 3KP36CA-B classified as obsolete?

A: The 3KP36CA-B has been discontinued by Littelfuse Inc. The 5KP36CA-B serves as the active-production replacement with equivalent electrical performance and enhanced specifications.

Q: Can I use the 15KP36CA-TP in place of the 3KP36CA-B?

A: Yes, for voltage regulation purposes. The 15KP36CA-TP maintains the required 36V standoff and 58.1V clamping voltage specifications. The significantly higher power dissipation (15000W versus 3000W) makes it suitable for applications with higher transient energy levels. Verify that the application circuit can accommodate the different package format (R-6 axial).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts (5KP36CA-B, 15KP36CA-TP, and 3KP36CA-TP) are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the peak pulse current specification for the 15KP36CA-TP?

A: The peak pulse current (10/1000µs) specification is not provided in the available technical data for the 15KP36CA-TP. Contact the manufacturer for this parameter if required for circuit analysis.

Q: Which substitute offers the best inventory availability?

A: The 5KP36CA-B (Littelfuse Inc.) offers the highest inventory availability at 5000 pieces in stock, followed by the 15KP36CA-TP (Micro Commercial Co) at 4100 pieces, and the 3KP36CA-TP (Micro Commercial Co) at 645 pieces.