5KP36A-B Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The 5KP36A-B is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component operates across a wide temperature range of -55°C to 175°C and is ROHS3 compliant. The part is currently active in production with 1082 units in stock. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that maintain functional equivalence in circuit protection applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	5KP36A-B
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	36V
Voltage - Breakdown (Min)	40V
Voltage - Clamping (Max) @ Ipp	58.1V
Current - Peak Pulse (10/1000µs)	87.8A
Power - Peak Pulse	5000W (5kW)
Operating Temperature	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	P600, Axial
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 5KP36A-B are categorized based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Unidirectional Zener TVS diode type
Voltage - Reverse Standoff within acceptable tolerance of 36V nominal
Voltage - Clamping (Max) @ Ipp in the range of 49.9V to 59.3V
Through-hole axial mounting configuration
Operating temperature range of -50°C to 175°C minimum
ROHS3 compliance and general-purpose application classification

Grouping Logic:

Group 1: Direct Package Equivalents (P600 Package) Parts maintaining identical P600 axial package and 5kW peak pulse power rating: 5KP36A (Diotec Semiconductor) and 5KP36A-TP (Micro Commercial Co). These provide electrical and mechanical interchangeability with packaging variations (Bulk vs. Tape & Reel).

Group 2: Voltage-Matched Alternatives (36V Standoff) Parts with matching 36V reverse standoff voltage but different packages and reduced power ratings: 1.5KE36A (Taiwan Semiconductor Corporation) and P6KE36A (Fairchild Semiconductor). These maintain voltage compatibility while offering alternative form factors (DO-201 and DO-15 packages respectively).

Group 3: Higher Voltage Alternatives (39V-43V Standoff) Parts with elevated reverse standoff voltages (33V to 36.8V) and corresponding clamping voltages: 1.5KE39A, 1.5KE43A (Taiwan Semiconductor Corporation), P6KE43A (Diotec Semiconductor), and SA33A (Fairchild Semiconductor). These provide overvoltage margin for applications requiring higher transient suppression thresholds.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Product Status
5KP36A-B	Littelfuse Inc.	36V	40V	58.1V	87.8A	5000W	P600, Axial	Active
5KP36A	Diotec Semiconductor	36V	40V	58.1V	86A	5000W	P600, Axial	Active
5KP36A-TP	Micro Commercial Co	36V	40V	58.1V	-	5000W	R-6, Axial	Active
1.5KE36A	Taiwan Semiconductor Corporation	30.8V	34.2V	49.9V	31A	1500W	DO-201AA, DO-27, Axial	Active
1.5KE39A	Taiwan Semiconductor Corporation	33.3V	37.1V	53.9V	29A	1500W	DO-201AA, DO-27, Axial	Active
1.5KE43A	Taiwan Semiconductor Corporation	36.8V	40.9V	59.3V	26A	1500W	DO-201AA, DO-27, Axial	Active
P6KE36A	Fairchild Semiconductor	30.8V	34.2V	49.9V	12.6A	600W	DO-204AC, DO-15, Axial	Active
P6KE43A	Diotec Semiconductor	36.8V	40.9V	59.3V	10.6A	600W	DO-204AC, DO-15, Axial	Active
SA33A	Fairchild Semiconductor	33V	36.7V	53.3V	9.4A	500W	DO-204AC, DO-15, Axial	Obsolete

Engineering Selection Recommendations

For Direct Replacement (Same Package and Power Rating): The 5KP36A (Diotec Semiconductor) and 5KP36A-TP (Micro Commercial Co) are functionally equivalent to the 5KP36A-B. Both maintain the P600 axial package configuration and 5kW peak pulse power rating with matching voltage characteristics. Selection between these options depends on packaging requirements: 5KP36A is available in Tape & Reel format, while 5KP36A-TP is supplied in Cut Tape. Both are ROHS3 compliant and active in production.

For Reduced Power Applications: The 1.5KE series (1.5KE36A, 1.5KE39A, 1.5KE43A) from Taiwan Semiconductor Corporation provides 1500W peak pulse power in DO-201 packages. These parts are suitable for applications where the full 5kW capability is not required. The 1.5KE36A maintains the closest voltage alignment to the original part. All three variants are ROHS3 compliant and active in production with high inventory availability.

For Compact Form Factor Applications: The P6KE series (P6KE36A, P6KE43A) offers 600W peak pulse power in DO-15 packages, providing the smallest footprint option. These parts are appropriate for space-constrained designs where lower transient energy absorption is acceptable. Both are ROHS3 compliant and active in production.

Avoid Selection: The SA33A (Fairchild Semiconductor) is marked as obsolete and should not be selected for new designs despite current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use the 1.5KE36A as a direct replacement for the 5KP36A-B? A: The 1.5KE36A is electrically compatible for voltage protection but differs in package (DO-201 vs. P600) and power rating (1500W vs. 5000W). It is suitable only if your circuit design accommodates the different package footprint and lower peak pulse power is sufficient for your application requirements.

Q: What is the difference between 5KP36A and 5KP36A-TP? A: Both parts are electrically identical with matching voltage and power specifications. The difference is packaging: 5KP36A is supplied in Bulk, while 5KP36A-TP is supplied in Cut Tape. Selection depends on your assembly process requirements.

Q: Why are there multiple voltage options (36V, 39V, 43V standoff)? A: Different standoff voltages provide varying levels of overvoltage protection margin. The 36V standoff matches the original part. Higher standoff voltages (39V, 43V) allow greater transient voltage before clamping, suitable for applications requiring additional protection headroom.

Q: Can I use P6KE36A in place of 5KP36A-B? A: The P6KE36A is electrically compatible for voltage protection but has significantly reduced power handling (600W vs. 5000W) and uses a different package (DO-15 vs. P600). It is suitable only for low-energy transient suppression applications where the original part's power rating is not required.

Q: Are all substitute parts ROHS3 compliant? A: All active substitute parts listed are ROHS3 compliant. The SA33A, marked as obsolete, is also ROHS3 compliant but should not be used in new designs.

Q: What is the operating temperature range for substitute parts? A: Most substitute parts operate from -50°C to 175°C (TJ), which is compatible with the original 5KP36A-B range of -55°C to 175°C. Verify specific application requirements if operation below -50°C is necessary.

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