5KP36CA-B Transient Voltage Suppressor Diode - Equivalent & Substitute Parts

Part Overview

The 5KP36CA-B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component operates with a 36V reverse standoff voltage and delivers 5000W peak pulse power in a P600 axial package. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching or compatible electrical characteristics including reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and power dissipation capacity, combined with compatible through-hole package configurations.

Key Parameters

Parameter	Value	Unit
Reverse Standoff Voltage (Typ)	36	V
Breakdown Voltage (Min)	40	V
Clamping Voltage (Max) @ Ipp	58.1	V
Peak Pulse Current (10/1000µs)	87.8	A
Peak Pulse Power	5000	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	P600, Axial	Through Hole
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP36CA-B is determined by the following criteria:

Primary Matching Parameters:

Reverse standoff voltage within the 36V nominal range
Breakdown voltage minimum at or above 40V
Clamping voltage compatibility at specified peak pulse current
Peak pulse power rating of 5000W or greater
Through-hole axial package configuration (P600, DO-201, DO-15, or R-6)
Bidirectional channel configuration (1 channel)
Operating temperature range supporting -55°C to 175°C minimum

Compliance Requirements:

RoHS3 compliance
Active product status
Unlimited moisture sensitivity level (MSL 1)

Substitute parts are grouped into three categories based on package type and power rating: full-capacity P600 package equivalents, reduced-capacity DO-201 package alternatives, and lower-power DO-15 package options for applications with reduced current demands.

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Package	Temp Range (°C)
5KP36CA-B	Littelfuse Inc.	36	40	58.1	87.8	5000	P600	-55 to 175
5KP36CA	Diotec Semiconductor	36	40	58.1	86	5000	P600	-50 to 175
5KP36CA-TP	Micro Commercial Co	36	40	58.1	—	5000	R-6	-55 to 175
15KP36CA-TP	Micro Commercial Co	36	40	59.7	—	15000	R-6	-55 to 175
1.5KE36CA	Good-Ark Semiconductor	30.8	34.2	49.9	30.1	1500	DO-201AE	-55 to 175
1.5KE39CA	Taiwan Semiconductor Corporation	33.3	37.1	53.9	29	1500	DO-201	-55 to 150
1.5KE43CA	Taiwan Semiconductor Corporation	36.8	40.9	59.3	26	1500	DO-201	-55 to 175
P6KE36CA	Taiwan Semiconductor Corporation	30.8	34.2	49.9	12	600	DO-15	—
SA36CA	Taiwan Semiconductor Corporation	36	40	58.1	9	500	DO-15	-55 to 175

Engineering Selection Recommendations

Full Capacity Equivalents (5000W, P600 Package): The 5KP36CA from Diotec Semiconductor provides direct electrical equivalence with identical reverse standoff, breakdown, and clamping voltages. Peak pulse current of 86A matches the original specification within tolerance. Both parts maintain RoHS3 compliance and unlimited MSL rating. The Diotec variant operates at -50°C minimum versus -55°C for the Littelfuse original, which is acceptable for most applications. The 5KP36CA-TP from Micro Commercial Co delivers equivalent electrical performance in an R-6 package, suitable where package footprint differs from P600.

Higher Power Alternative (15000W, R-6 Package): The 15KP36CA-TP provides 3× power dissipation capacity while maintaining identical voltage specifications. This part is appropriate for applications requiring enhanced transient energy absorption or where thermal management constraints exist. R-6 package compatibility must be verified against PCB layout requirements.

Reduced Power Alternatives (1500W, DO-201 Package): The 1.5KE36CA, 1.5KE39CA, and 1.5KE43CA offer 1500W peak pulse power in DO-201 package configurations. These parts are suitable for lower-current applications where the full 5000W capacity is not required. The 1.5KE36CA maintains the closest voltage alignment (30.8V standoff, 49.9V clamping). The 1.5KE39CA and 1.5KE43CA provide slightly elevated voltage ratings. All three maintain RoHS3 compliance and -55°C to 175°C operating range (1.5KE39CA limited to -55°C to 150°C).

Low Power Alternatives (600W or 500W, DO-15 Package): The P6KE36CA and SA36CA are suitable only for applications with significantly reduced transient current requirements. The P6KE36CA delivers 600W in DO-15 package with 30.8V standoff voltage. The SA36CA provides 500W with exact voltage matching (36V standoff, 58.1V clamping) but limited to 9A peak pulse current. These options are appropriate for signal-level protection rather than power distribution applications.

All recommended substitutes maintain active product status, RoHS3 compliance, and unlimited moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can the 5KP36CA-B be replaced with a lower power rating part?

A: Substitution to lower power ratings is application-dependent. The 1.5KE series (1500W) is suitable for applications with peak pulse currents below 30A. The P6KE36CA and SA36CA (600W and 500W respectively) are limited to applications with peak pulse currents below 12A. Verify that the transient energy in your application does not exceed the substitute part's power dissipation capacity.

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

A: Both are through-hole axial packages for TVS diodes. P600 is the standard package for the 5KP36CA-B. The R-6 package used by 5KP36CA-TP and 15KP36CA-TP offers equivalent electrical performance but different physical dimensions. PCB layout and lead spacing must be verified before substitution.

Q: Are DO-201 and DO-15 packages interchangeable with P600?

A: No. DO-201 and DO-15 are smaller axial packages with different lead spacing and physical dimensions. While electrically compatible substitutes exist in these packages formats, physical board layout modifications are required. DO-201 parts (1.5KE series) are intermediate in size between P600 and DO-15. DO-15 parts (P6KE36CA, SA36CA) are the smallest option.

Q: Can I use the 15KP36CA-TP as a direct replacement for the 5KP36CA-B?

A: The 15KP36CA-TP provides identical voltage specifications and R-6 package compatibility with the 5KP36CA-B. The primary difference is 3× higher power dissipation (15000W versus 5000W), which is not detrimental to circuit operation. Package footprint differences must be accommodated in PCB design.

Q: What compliance certifications apply to all substitute parts?

A: All listed substitute parts maintain RoHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity level (MSL 1). Operating temperature ranges vary: most parts support -55°C to 175°C; the 1.5KE39CA is limited to -55°C to 150°C; the P6KE36CA does not specify operating temperature range.

Q: How do I select between 1.5KE36CA, 1.5KE39CA, and 1.5KE43CA?

A: Selection depends on the required voltage rating. The 1.5KE36CA provides the closest match to the original 36V standoff specification. The 1.5KE39CA offers 33.3V standoff (lower voltage margin). The 1.5KE43CA provides 36.8V standoff with slightly elevated clamping voltage (59.3V). All three deliver 1500W peak pulse power and maintain full compliance ratings.

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