5KP78AE3/TR13 Equivalent & Substitute Parts

Part Overview

The 5KP78AE3/TR13 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose transient voltage protection applications. This component features a 78V reverse standoff voltage with a 126V maximum clamping voltage and 39.7A peak pulse current capability at 5000W peak pulse power. The device is housed in a P600 axial through-hole package and is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified to address inventory availability, supply chain continuity, or specific application requirements while maintaining electrical and mechanical compatibility within the TVS diode category.

Substiute Parts

5KP78AE3/TR13

Microchip TechnologyIn Stock: 9505KP78AE3/TR13 Datasheet

Current PartRFQ

5KP78A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 82855KP78A-E3/54 Datasheet

DirectRFQ

15KPA78A

MDE Semiconductor IncIn Stock: 169715KPA78A Datasheet

SimilarRFQ

5KP78A

Littelfuse Inc.In Stock: 42885KP78A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5KP78AE3/TR13 are classified based on electrical parameter compatibility and mechanical form factor equivalence. The primary substitution criteria are:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 78V
• Voltage - Clamping (Max) @ Ipp: 126V (±0.1V tolerance acceptable)
• Package / Case: P600, Axial
• Mounting Type: Through Hole
• Type: Zener, Unidirectional
• Operating Temperature Range: -55°C to 175°C (TJ)

Secondary Compatibility Parameters:

• Current - Peak Pulse (10/1000µs): 39.7A nominal (±2.3A variance acceptable for same power class)
• Power - Peak Pulse: 5000W (5kW) class
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories: Direct Equivalents (identical electrical specifications and packaging) and Similar Alternatives (matching voltage and package specifications with variations in current handling or power dissipation characteristics).

Parameter Comparison

Engineering Selection Recommendations

5KP78A-E3/54 (Vishay General Semiconductor - Diodes Division)

This part is a direct electrical equivalent to the 5KP78AE3/TR13, matching all critical voltage parameters (78V standoff, 126V clamping), current specifications (39.7A peak pulse), and power rating (5000W). Both devices share identical operating temperature range (-55°C to 175°C), P600 axial package configuration, and ROHS3 compliance. The primary difference is packaging format: the Vishay part is supplied in Cut Tape (CT) format rather than Tape & Reel (TR). This substitute is suitable for direct replacement in applications where packaging format flexibility is acceptable. The Vishay TransZorb® series designation indicates established reliability in the TVS diode market.

5KP78A (Littelfuse Inc.)

This part provides electrical equivalence with minor current specification variance (40.5A peak pulse versus 39.7A), representing a 2.0% increase within acceptable tolerance for the 5000W power class. Voltage parameters are identical (78V standoff, 126V clamping), and all mechanical specifications match the original part (P600 axial, through-hole mounting). Operating temperature range and compliance certifications are equivalent. This substitute is suitable for direct replacement with the understanding that peak pulse current handling is marginally higher. Littelfuse 5KP series components are established alternatives in general-purpose TVS applications.

15KPA78A (MDE Semiconductor Inc)

This part matches the voltage specifications (78V standoff, 126.1V clamping) and mechanical form factor (P600 axial, through-hole) of the original component. However, it features significantly higher current and power ratings (119.7A peak pulse, 15000W peak pulse power) compared to the 5KP78AE3/TR13 (39.7A, 5000W). This part functions as an over-specification substitute, providing enhanced transient protection capability. The 15KPA78A is suitable for applications requiring higher energy absorption or where design margin enhancement is specified. Operating temperature range and compliance certifications are equivalent. This substitute introduces higher performance characteristics and should be selected only when application requirements justify the increased power dissipation capability.

Frequently Asked Questions (FAQ)

Q: Can the 5KP78A-E3/54 (Vishay) be used as a direct replacement for the 5KP78AE3/TR13 (Microchip)?

A: Yes. The 5KP78A-E3/54 is a direct electrical equivalent with identical voltage parameters (78V standoff, 126V clamping), current specifications (39.7A peak pulse), and power rating (5000W). Both devices use the P600 axial through-hole package and operate across the same temperature range (-55°C to 175°C). The only difference is the packaging format: Vishay supplies this part in Cut Tape (CT) format while the Microchip original is in Tape & Reel (TR) format. This difference does not affect electrical performance or mechanical compatibility.

Q: What is the difference between the 5KP78A (Littelfuse) and the original 5KP78AE3/TR13?

A: The Littelfuse 5KP78A matches all critical specifications with one minor variance: peak pulse current is specified at 40.5A compared to 39.7A in the original part. This represents a 2.0% increase and remains within acceptable tolerance for components in the 5000W power class. Voltage parameters (78V standoff, 126V clamping), package type (P600 axial), and operating temperature range are identical. This part is suitable for direct replacement.

Q: When should the 15KPA78A (MDE) be selected instead of the original 5KP78AE3/TR13?

A: The 15KPA78A should be selected when application requirements specify higher transient energy absorption capability. This part provides 119.7A peak pulse current and 15000W peak pulse power compared to the original 39.7A and 5000W specifications. While voltage parameters remain equivalent (78V standoff, 126.1V clamping), the significantly higher power rating makes this part suitable for applications with more severe transient conditions or where design margin enhancement is required. The P600 axial package and operating temperature range remain compatible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (5KP78A-E3/54, 5KP78A, and 15KPA78A) are ROHS3 compliant, matching the compliance status of the original 5KP78AE3/TR13. All parts also carry Moisture Sensitivity Level 1 (Unlimited) rating.

Q: What packaging formats are available for these TVS diodes?

A: The substitute parts are available in three packaging formats: Tape & Reel (TR) for the original Microchip part, Cut Tape (CT) for the Vishay and Littelfuse parts, and Bulk for the MDE part. All parts use the same P600 axial through-hole package configuration. Selection of packaging format depends on assembly process requirements and inventory management practices.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes, all substitute parts share the P600 axial through-hole package configuration and identical pin spacing, allowing direct PCB footprint compatibility. Electrical performance differences (particularly the higher current and power ratings of the 15KPA78A) do not affect PCB layout requirements. Component selection should be based on application transient voltage protection requirements rather than PCB design constraints.

Q: What is the significance of the voltage parameters (standoff, breakdown, and clamping)?

A: Voltage - Reverse Standoff (78V) is the maximum voltage the diode blocks without conducting. Voltage - Breakdown (86.7V minimum) is the threshold at which the diode begins to conduct. Voltage - Clamping (126V maximum) is the voltage level maintained across the diode during peak pulse current flow. These three parameters define the protection window and must remain consistent across substitute parts to ensure equivalent circuit protection performance.