3KP36C-B Equivalent & Substitute Parts

Part Overview

The 3KP36C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 36V reverse standoff voltage with a 61.01V maximum clamping voltage and 51.6A peak pulse current capability in a through-hole P600 axial package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	3KP36C-B
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	36V
Voltage - Breakdown (Min)	37.89V
Voltage - Clamping (Max) @ Ipp	61.01V
Current - Peak Pulse (10/1000µs)	51.6A
Power - Peak Pulse	3000W
Operating Temperature	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	P600, Axial
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 3KP36C-B is determined by the following critical parameters:

Voltage - Reverse Standoff: 36V (all substitutes maintain this specification)
Voltage - Clamping (Max) @ Ipp: Range 58.1V to 61.8V (within acceptable tolerance for circuit protection)
Current - Peak Pulse: Minimum 51.6A (substitutes provide equal or greater capability)
Power - Peak Pulse: Minimum 3000W (substitutes provide equal or greater capability)
Operating Temperature: -55°C ~ 175°C (all substitutes match this range)
Mounting Type: Through Hole, Axial configuration
Package / Case: P600 or R-6 axial packages (mechanically compatible)
RoHS Status: ROHS3 Compliant (all substitutes meet this requirement)

Substitutes are grouped by power rating and current handling capacity, with higher-rated alternatives providing enhanced protection margins for the same 36V standoff voltage specification.

Parameter Comparison

Parameter	3KP36C-B (Main)	5KP36CA-B	15KP36CA-TP	15KPA36CAE3/TR13	30KP36CA-TP	3KP36CA-TP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Micro Commercial Co	Microchip Technology	Micro Commercial Co	Micro Commercial Co
Product Status	Obsolete	Active	Active	Active	Active	Active
Voltage - Reverse Standoff (Typ)	36V	36V	36V	36V	36V	36V
Voltage - Breakdown (Min)	37.89V	40V	40V	40.2V	40.2V	40V
Voltage - Clamping (Max) @ Ipp	61.01V	58.1V	59.7V	59.8V	61.8V	58.1V
Current - Peak Pulse (10/1000µs)	51.6A	87.8A	—	252.5A	—	51.6A
Power - Peak Pulse	3000W	5000W	15000W	15000W	30000W	3000W
Operating Temperature	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	P600, Axial	P600, Axial	R-6, Axial	P600, Axial	R-6, Axial	R-6, Axial
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Same Power Rating): The 3KP36CA-TP from Micro Commercial Co provides an exact functional match with identical 3000W peak pulse power and 51.6A peak pulse current. This part is currently active and ROHS3 compliant, making it the primary direct replacement for the obsolete 3KP36C-B.

Higher Power Alternatives: The 5KP36CA-B (5000W), 15KP36CA-TP (15000W), 15KPA36CAE3/TR13 (15000W), and 30KP36CA-TP (30000W) are all active substitutes that maintain the 36V reverse standoff voltage while providing enhanced transient protection capability. These parts are suitable for applications requiring greater surge handling capacity or where design margin improvement is desired.

Package Compatibility: The 3KP36C-B uses a P600 axial package. Substitutes using the R-6 axial package (15KP36CA-TP, 30KP36CA-TP, 3KP36CA-TP) are mechanically compatible for through-hole mounting but may require PCB layout verification due to package dimension differences.

Compliance and Availability: All substitute parts are ROHS3 compliant and currently in active production status, ensuring long-term availability and regulatory compliance for new designs and ongoing support of existing applications.

Frequently Asked Questions (FAQ)

Q: Can I use a higher power-rated TVS diode as a substitute for the 3KP36C-B? A: Yes. The 5KP36CA-B, 15KP36CA-TP, 15KPA36CAE3/TR13, and 30KP36CA-TP all maintain the critical 36V reverse standoff voltage and provide equal or superior clamping voltage performance. Higher power ratings offer increased transient protection margin without compromising circuit compatibility.

Q: What is the difference between P600 and R-6 packages? A: Both are through-hole axial packages suitable for the same mounting method. P600 and R-6 are mechanically compatible alternatives, though physical dimensions may differ slightly. Verify PCB pad spacing and component clearance before substitution.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts meet ROHS3 compliance requirements, ensuring regulatory compatibility with current environmental standards.

Q: Which substitute provides the closest electrical match to the 3KP36C-B? A: The 3KP36CA-TP from Micro Commercial Co provides an exact match in power rating (3000W) and peak pulse current (51.6A), with identical clamping voltage performance (58.1V).

Q: Can I use the 15KPA36CAE3/TR13 in place of the 3KP36C-B? A: Yes. This part maintains the 36V reverse standoff voltage and provides superior transient protection with 15000W peak pulse power and 252.5A peak pulse current. It is suitable for applications requiring enhanced protection margins.

Q: What should I verify before substituting the 3KP36C-B? A: Confirm that the substitute part maintains the 36V reverse standoff voltage, verify PCB package compatibility (P600 vs. R-6 axial), and ensure the clamping voltage and power rating meet circuit protection requirements.

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