Equivalent & Substitute Parts for 5KP22A-E3/51 Transient Voltage Suppressor

Part Overview

The 5KP22A-E3/51 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in through-hole P600 axial package configuration. This part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	22	V
Voltage - Breakdown (Min)	24.4	V
Voltage - Clamping (Max) @ Ipp	35.5	V
Current - Peak Pulse (10/1000µs)	141	A
Power - Peak Pulse	5000	W
Operating Temperature Range	-55 to 175	°C
Mounting Type	Through Hole
Package / Case	P600, Axial
Type	Zener
Unidirectional Channels	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 5KP22A-E3/51 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 22V
Voltage - Clamping (Max) @ Ipp: 35.5V
Current - Peak Pulse (10/1000µs): 141A
Power - Peak Pulse: 5000W
Package / Case: P600, Axial
Mounting Type: Through Hole
Operating Temperature Range: -55°C to 175°C

Substitute parts are grouped into two categories:

Category 1: Direct Electrical & Mechanical Equivalents (P600 Package, 5kW Power Rating) Parts maintaining identical voltage ratings, peak pulse current of 141A, 5kW power dissipation, and P600 axial through-hole package. These include variants from Vishay, Microchip Technology, Diotec Semiconductor, and Littelfuse with different packaging formats (cut tape, tape & reel, bulk).

Category 2: Higher Power Capability Substitutes (P600 Package, Enhanced Performance) Parts with identical voltage ratings and P600 package but higher peak pulse current (407A) and 15kW power rating from Littelfuse 15KPA series. These provide enhanced transient protection margin.

Category 3: Lower Power Alternative (DO-201 Package, Reduced Performance) The 1.5KE27A from Taiwan Semiconductor Corporation offers similar voltage protection but with reduced peak pulse current (42A) and 1.5kW power rating in DO-201 package. This substitute applies only to applications with lower transient energy requirements.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Package	Product Status
5KP22A-E3/51	Vishay	22	35.5	141	5000	P600, Axial	Obsolete
5KP22A-E3/54	Vishay	22	35.5	141	5000	P600, Axial	Active
5KP22AE3/TR13	Microchip Technology	22	35.5	141	5000	P600, Axial	Active
5KP22A	Diotec Semiconductor	22	35.5	141	5000	P600, Axial	Active
5KP22A-B	Littelfuse	22	35.5	143.7	5000	P600, Axial	Active
5KP22A-HR	Littelfuse Inc.	22	35.5	143.7	5000	P600, Axial	Active
5KP22A-HRA	Littelfuse Inc.	22	35.5	143.7	5000	P600, Axial	Active
15KPA22A-HR	Littelfuse Inc.	22	37.1	407	15000	P600, Axial	Active
15KPA22A-HRA	Littelfuse Inc.	22	37.1	407	15000	P600, Axial	Active
1.5KE27A	Taiwan Semiconductor Corporation	23.1	37.5	42	1500	DO-201AA, Axial	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement): 5KP22A-E3/54, 5KP22AE3/TR13, 5KP22A, 5KP22A-B, 5KP22A-HR, and 5KP22A-HRA are direct functional equivalents with identical electrical performance and P600 package compatibility. All are active products with ROHS3 compliance. Selection among these variants depends on packaging format requirements: cut tape (5KP22A-E3/54), tape & reel (5KP22AE3/TR13, 5KP22A-HR, 5KP22A-HRA), or bulk (5KP22A-B). Littelfuse variants (5KP22A-HR, 5KP22A-HRA) offer tape & reel packaging with slightly higher peak pulse current (143.7A vs 141A), providing marginal performance enhancement.

Enhanced Protection Alternative: 15KPA22A-HR and 15KPA22A-HRA from Littelfuse provide identical voltage ratings and P600 package but deliver 15kW peak pulse power with 407A peak pulse current. These are suitable for applications requiring higher transient energy absorption margin. Both are active products with ROHS3 compliance and tape & reel packaging.

Lower Power Alternative: 1.5KE27A from Taiwan Semiconductor Corporation is applicable only when transient energy requirements are reduced. This part operates at 1.5kW power rating with 42A peak pulse current in DO-201 package. Voltage ratings differ slightly (23.1V standoff vs 22V). This substitute is not recommended for direct replacement in existing designs but may be considered for new applications with lower transient stress.

Frequently Asked Questions (FAQ)

Q: Can 5KP22A-E3/54 directly replace 5KP22A-E3/51 in existing designs? A: Yes. Both parts share identical electrical specifications (22V standoff, 35.5V clamping, 141A peak pulse, 5kW power) and P600 axial through-hole package. The primary difference is product status: 5KP22A-E3/51 is obsolete while 5KP22A-E3/54 is active. No circuit modifications are required.

Q: What is the difference between 5KP22A-HR and 5KP22A-HRA? A: Both are Littelfuse products with identical electrical performance and P600 package. The suffix "-HR" indicates tape & reel packaging, while "-HRA" indicates an automotive-qualified variant of the same series. Electrical specifications are equivalent; selection depends on qualification requirements and packaging format availability.

Q: Can 15KPA22A-HRA replace 5KP22A-E3/51? A: Electrical substitution is possible due to matching 22V standoff voltage and P600 package. However, 15KPA22A-HRA provides 15kW peak pulse power versus 5kW in the original part. This higher rating does not degrade circuit performance but increases component cost and may be unnecessary for applications designed for 5kW protection. Use only when enhanced transient margin is required.

Q: Is 1.5KE27A a suitable substitute? A: 1.5KE27A is not recommended as a direct replacement. While it provides similar voltage protection (23.1V standoff), it operates at only 1.5kW power rating with 42A peak pulse current—significantly lower than the original 5kW/141A specification. Additionally, it uses DO-201 package instead of P600. This part is suitable only for new designs with lower transient stress requirements.

Q: Are all substitute parts ROHS3 compliant? A: All active substitute parts listed (5KP22A-E3/54, 5KP22AE3/TR13, 5KP22A-B, 5KP22A-HR, 5KP22A-HRA, 15KPA22A-HR, 15KPA22A-HRA) are ROHS3 compliant. The 1.5KE27A is also ROHS3 compliant. Compliance status is consistent across all recommended substitutes.

Q: What packaging formats are available for direct equivalents? A: Direct electrical equivalents are available in three packaging formats: cut tape (5KP22A-E3/54), tape & reel (5KP22AE3/TR13, 5KP22A-HR, 5KP22A-HRA), and bulk (5KP22A-B). All maintain P600 axial through-hole package. Selection depends on production volume and procurement requirements.

Q: Can I use Diotec 5KP22A instead of Vishay 5KP22A-E3/51? A: Yes. Diotec 5KP22A is electrically and mechanically equivalent with identical 22V standoff, 35.5V clamping, 141A peak pulse, and 5kW power rating in P600 package. It is an active product with ROHS3 compliance. The primary consideration is supplier availability and qualification status within your organization.

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