Equivalent & Substitute Parts for 5KP43A-G

Part Overview

The 5KP43A-G is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Comchip Technology, designed for general-purpose transient voltage protection applications. This through-hole component operates across a temperature range of -55°C to 150°C and is ROHS3 compliant. The part is currently active in production with 845 units in stock. Substitute parts are identified to provide design flexibility, alternative sourcing options, and compatibility with different manufacturing environments while maintaining equivalent electrical and mechanical performance.

Substiute Parts

5KP43A-G

Comchip TechnologyIn Stock: 8755KP43A-G Datasheet

Current PartRFQ

5KP43A

Littelfuse Inc.In Stock: 34105KP43A Datasheet

MFR RecommendedRFQ

5KP43A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 81645KP43A-E3/54 Datasheet

MFR RecommendedRFQ

5KP48A

Littelfuse Inc.In Stock: 88785KP48A Datasheet

MFR RecommendedRFQ

P6KE51A

Fairchild SemiconductorIn Stock: 18607P6KE51A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP43A-G is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 43V
• Voltage - Breakdown (Min): 47.8V
• Voltage - Clamping (Max) @ Ipp: 69.4V
• Current - Peak Pulse (10/1000µs): Minimum 72.05A
• Power - Peak Pulse: 5000W (5kW)
• Type: Zener, Unidirectional
• Mounting Type: Through Hole
• RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories:

Category 1 - Direct Electrical Equivalents (Same Voltage Rating):

• 5KP43A (Littelfuse Inc.)
• 5KP43A-E3/54 (Vishay General Semiconductor - Diodes Division)

These parts maintain identical voltage specifications (43V reverse standoff, 47.8V breakdown, 69.4V clamping) with peak pulse currents within acceptable tolerance of the original specification.

Category 2 - Alternative Voltage Rating:

• 5KP48A (Littelfuse Inc.) - Higher voltage rating (48V standoff, 77.4V clamping)
• P6KE51A (Fairchild Semiconductor) - Different series classification

The 5KP48A operates at a higher voltage threshold and is suitable only for applications where the elevated voltage rating does not conflict with circuit design requirements. The P6KE51A represents a different product series with incomplete parameter data in the provided specification.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution (Identical Electrical Performance):

The 5KP43A (Littelfuse Inc.) and 5KP43A-E3/54 (Vishay General Semiconductor - Diodes Division) are direct electrical equivalents to the 5KP43A-G. Both maintain the 43V reverse standoff voltage, 47.8V breakdown voltage, and 69.4V clamping voltage specifications. Both are ROHS3 compliant and active in production. The Littelfuse 5KP43A offers higher peak pulse current (74.6A versus 72.05A) and extended operating temperature range (-55°C to 175°C versus -55°C to 150°C). The Vishay 5KP43A-E3/54 provides equivalent peak pulse current (72A) and identical extended temperature range. Both substitute parts use P600 axial packaging, which is mechanically compatible with R-6 through-hole mounting applications.

For Alternative Voltage Applications:

The 5KP48A (Littelfuse Inc.) operates at a higher voltage threshold (48V reverse standoff, 77.4V clamping) and is suitable only for circuit designs requiring elevated voltage protection levels. This part is not interchangeable with the 5KP43A-G in applications requiring 43V protection specifications.

Compliance and Certification:

All identified substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification, consistent with the original 5KP43A-G specifications.

Frequently Asked Questions (FAQ)

Q: Can the 5KP43A replace the 5KP43A-G in my circuit?

A: Yes. The 5KP43A (Littelfuse Inc.) is a direct electrical equivalent with identical voltage ratings (43V standoff, 69.4V clamping) and equivalent peak pulse current performance. Both are ROHS3 compliant and rated for 5000W peak pulse power. The primary difference is packaging designation (P600 versus R-6), which does not affect through-hole mounting compatibility.

Q: What is the difference between the 5KP43A-E3/54 and the original 5KP43A-G?

A: The 5KP43A-E3/54 (Vishay) maintains identical electrical specifications to the 5KP43A-G, including 43V reverse standoff voltage and 69.4V clamping voltage. The primary differences are manufacturer (Vishay versus Comchip), packaging designation (P600 versus R-6), and extended operating temperature range (-55°C to 175°C versus -55°C to 150°C). Electrical performance is equivalent.

Q: Why would I use the 5KP48A instead of the 5KP43A-G?

A: The 5KP48A is not a direct substitute. It operates at a higher voltage threshold (48V standoff, 77.4V clamping versus 43V standoff, 69.4V clamping). Use the 5KP48A only in applications where circuit design requires protection at the higher 48V voltage level. Substituting the 5KP48A in a 43V-rated circuit will result in inadequate transient voltage suppression.

Q: Are there package compatibility concerns between R-6 and P600 axial packages?

A: Both R-6 and P600 are axial through-hole packages with compatible lead spacing and mounting characteristics. Physical dimensions may vary slightly, but both are suitable for standard through-hole PCB applications. Verify PCB footprint specifications before assembly.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All identified substitute parts (5KP43A, 5KP43A-E3/54, and 5KP48A) are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes, consistent with the original 5KP43A-G specifications.

Q: What is the inventory availability for substitute parts?

A: The 5KP43A (Littelfuse) has 3,339 units in stock. The 5KP43A-E3/54 (Vishay) has 8,100 units in stock. The 5KP48A (Littelfuse) has 8,800 units in stock. These quantities exceed the original part inventory of 845 units, providing enhanced sourcing flexibility.