5KP36C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 5KP36C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole P600 package component features a 36V reverse standoff voltage and 5000W peak pulse power rating. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	5KP36C
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	36V
Voltage - Breakdown (Min)	37.89V
Voltage - Clamping (Max) @ Ipp	61.01V
Power - Peak Pulse	5000W (5kW)
Mounting Type	Through Hole
Package / Case	P600, Axial
Operating Temperature	-55°C ~ 175°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 5KP36C is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 36V ± tolerance
Voltage - Clamping (Max) @ Ipp: within acceptable range for circuit protection
Power - Peak Pulse: minimum 5000W (5kW) to maintain protection capability
Bidirectional operation: single channel, bidirectional configuration
Mounting Type: Through Hole
Package compatibility: P600 package preferred for direct replacement; alternative packages (DO-201, DO-15) acceptable with mechanical adaptation

Secondary Compatibility Factors:

Operating Temperature range: -55°C minimum to 175°C maximum
RoHS3 Compliance: required for regulatory alignment
Type: Zener diode technology

Substitute parts are grouped into two categories: direct package replacements (P600 package) and functional equivalents with alternative packages that maintain electrical performance within specified parameters.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status
5KP36C	Littelfuse Inc.	36V	37.89V	61.01V	5000W	P600, Axial	-55°C ~ 175°C	Obsolete
5KP36CA	Diotec Semiconductor	36V	40V	58.1V	5000W	P600, Axial	-50°C ~ 175°C	Active
SLD36-018-B	Littelfuse Inc.	36V	40V	58.1V	5000W	P600, Axial	-55°C ~ 175°C	Active
5KP36CE3/TR13	Microchip Technology	36V	40V	64.3V	5000W	P600, Axial	-55°C ~ 175°C	Active
15KP36CA-TP	Micro Commercial Co	36V	40V	59.7V	15000W	R-6, Axial	-55°C ~ 175°C	Active
1.5KE36CA	Good-Ark Semiconductor	30.8V	34.2V	49.9V	1500W	DO-201AE, Axial	-55°C ~ 175°C	Active
1.5KE39CA	Taiwan Semiconductor Corporation	33.3V	37.1V	53.9V	1500W	DO-201AA, Axial	-55°C ~ 150°C	Active
1.5KE43CA	Taiwan Semiconductor Corporation	36.8V	40.9V	59.3V	1500W	DO-201AA, Axial	-55°C ~ 175°C	Active
P6KE36CA	Taiwan Semiconductor Corporation	30.8V	34.2V	49.9V	600W	DO-204AC, Axial	-	Active
SA36CA	Taiwan Semiconductor Corporation	36V	40V	58.1V	500W	DO-204AC, Axial	-55°C ~ 175°C	Active

Engineering Selection Recommendations

Tier 1 - Direct Replacements (P600 Package, 5000W Power Rating):

5KP36CA (Diotec Semiconductor) and SLD36-018-B (Littelfuse Inc.) are the primary substitutes. Both maintain the P600 package, 36V reverse standoff voltage, and 5000W peak pulse power rating. SLD36-018-B carries AEC-Q101 automotive qualification and is manufactured by the original equipment supplier, making it the preferred choice for applications requiring automotive-grade reliability. 5KP36CA offers equivalent electrical performance with active product status and higher inventory availability.

5KP36CE3/TR13 (Microchip Technology) provides identical package and power specifications with active status. The slightly elevated clamping voltage (64.3V vs. 61.01V) remains within acceptable circuit protection parameters for 36V systems.

Tier 2 - Higher Power Alternative (R-6 Package, 15000W Power Rating):

15KP36CA-TP (Micro Commercial Co) offers enhanced transient protection capability with 15000W peak pulse power in an R-6 through-hole package. This part is suitable for applications requiring increased surge handling capacity while maintaining 36V voltage class operation.

Tier 3 - Reduced Power Alternatives (1500W and Below):

1.5KE36CA, 1.5KE39CA, 1.5KE43CA, P6KE36CA, and SA36CA are functional alternatives for applications where 5000W peak pulse power is not required. These parts feature reduced power ratings (1500W or 600W) and alternative package configurations (DO-201, DO-15). Selection from this tier requires verification that circuit transient energy does not exceed the lower power rating.

All recommended substitutes maintain ROHS3 compliance and through-hole mounting configuration. Operating temperature ranges of -55°C to 175°C are supported by all Tier 1 and most Tier 2 alternatives, ensuring thermal compatibility with the original 5KP36C specification.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different package type?

A: Yes, provided the electrical parameters remain compatible. P600 package substitutes (5KP36CA, SLD36-018-B, 5KP36CE3/TR13) are direct mechanical replacements. Alternative packages (R-6, DO-201, DO-15) require PCB layout verification to confirm mechanical fit and lead spacing compatibility. All recommended substitutes maintain through-hole mounting.

Q: What is the minimum power rating required for a substitute?

A: The 5KP36C specifies 5000W peak pulse power. Tier 1 substitutes maintain this rating. Tier 3 alternatives with 1500W or 600W ratings are only suitable if circuit analysis confirms transient energy does not exceed the lower power specification. Tier 2 (15KP36CA-TP) exceeds the original specification and provides enhanced protection margin.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All recommended substitutes carry ROHS3 Compliant status, matching the original 5KP36C specification.

Q: Which substitute is recommended for automotive applications?

A: SLD36-018-B (Littelfuse Inc.) carries AEC-Q101 automotive qualification and is manufactured by the original equipment supplier. This part is the specified choice for automotive-grade reliability requirements.

Q: Can I use 1.5KE36CA or 1.5KE39CA as direct replacements?

A: These parts are functional alternatives only, not direct replacements. They feature reduced power ratings (1500W vs. 5000W) and alternative package configurations (DO-201AE vs. P600). Use only if circuit transient energy analysis confirms compatibility with the lower power rating and if PCB layout accommodates the different package geometry.

Q: What is the difference between 5KP36CA and SLD36-018-B?

A: Both parts maintain identical electrical specifications (36V reverse standoff, 5000W power, P600 package). SLD36-018-B includes AEC-Q101 automotive qualification and is supplied by Littelfuse Inc., the original manufacturer. 5KP36CA is supplied by Diotec Semiconductor with equivalent performance and higher inventory availability. Selection depends on automotive qualification requirements and supply chain preferences.

Q: Why do some substitutes have different clamping voltages?

A: Clamping voltage variation within the 36V class reflects manufacturing tolerance and design differences across suppliers. All recommended Tier 1 substitutes maintain clamping voltages within acceptable ranges for 36V circuit protection (58.1V to 64.3V). Circuit design must verify that the specific clamping voltage remains compatible with downstream component voltage ratings.

Q: Is operating temperature range critical for substitution?

A: Yes. The original 5KP36C specifies -55°C to 175°C operation. All Tier 1 substitutes and most Tier 2 alternatives support this range. 1.5KE39CA operates to 150°C maximum, which may be limiting in high-temperature applications. Verify application temperature requirements before selection.

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