5KP45A-E3/73 Equivalent & Substitute Parts

Part Overview

The 5KP45A-E3/73 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This through-hole P600 axial package component is designed for general-purpose transient voltage protection applications. The device features a 45V reverse standoff voltage with a 72.7V maximum clamping voltage and 68.8A peak pulse current capability at 5000W peak pulse power. The part maintains Active product status with full ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching or compatible electrical characteristics and mechanical packaging specifications.

Substiute Parts

5KP45A-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 11905KP45A-E3/73 Datasheet

Current PartRFQ

15KPA45A

MDE Semiconductor IncIn Stock: 213015KPA45A Datasheet

MFR RecommendedRFQ

5KP45A

Littelfuse Inc.In Stock: 30585KP45A Datasheet

MFR RecommendedRFQ

5KP45A-TP

Micro Commercial CoIn Stock: 12455KP45A-TP 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 5KP45A-E3/73 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 45V
• Voltage - Clamping (Max) @ Ipp: 72.7V ±tolerance
• Mounting Type: Through Hole
• Package / Case: P600 or compatible axial package
• Type: Zener unidirectional TVS diode
• Operating Temperature Range: -55°C to 175°C (TJ)
• RoHS Status: ROHS3 Compliant

Substitute parts must maintain the same reverse standoff voltage (45V), clamping voltage within acceptable tolerance, and through-hole axial package configuration. Peak pulse current and power ratings may vary based on application requirements, but all substitutes must support the same voltage protection class and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (45V Standoff, 72.7V Clamping, P600 Package):

The 5KP45A manufactured by Littelfuse Inc. and the 5KP45A-TP manufactured by Micro Commercial Co. are direct electrical equivalents to the 5KP45A-E3/73. Both maintain identical reverse standoff voltage (45V), clamping voltage (72.7V), and 5000W peak pulse power rating. The 5KP45A-TP uses an R-6 axial package variant instead of P600, which may require PCB layout verification for mechanical fit. All three parts maintain ROHS3 compliance and -55°C to 175°C operating temperature range.

Higher Power Alternative (45V Standoff, 72.8V Clamping, 15kW Rating):

The 15KPA45A manufactured by MDE Semiconductor Inc. provides equivalent voltage protection (45V standoff, 72.8V clamping) with significantly higher peak pulse current (207.4A) and power dissipation (15000W). This part is suitable for applications requiring enhanced transient energy absorption while maintaining the same voltage class and P600 axial package configuration. ROHS3 compliance is confirmed; REACH status requires verification upon request.

Higher Voltage Alternative (48V Standoff, 77.4V Clamping, P600 Package):

The 5KP48A manufactured by Littelfuse Inc. operates at a higher voltage class (48V standoff, 77.4V clamping) with the same 5000W peak pulse power and P600 axial package. This part is not a direct substitute but may be considered for applications where higher voltage protection is required. Selection requires confirmation that the circuit design tolerates the increased clamping voltage.

Limited Data Substitute:

The P6KE51A manufactured by Fairchild Semiconductor is listed as a substitute part but lacks complete electrical parameter documentation in the provided data. This part should be cross-referenced with the manufacturer's datasheet before selection.

Frequently Asked Questions (FAQ)

Q: Can the 5KP45A-TP (R-6 package) be used as a direct replacement for the 5KP45A-E3/73 (P600 package)?

A: The 5KP45A-TP is electrically equivalent with identical voltage and power ratings. However, the R-6 axial package has different physical dimensions compared to the P600 package. PCB layout and lead spacing must be verified for mechanical compatibility before substitution.

Q: What is the difference between the 5KP45A and the 15KPA45A?

A: Both parts maintain the same 45V reverse standoff voltage and 72.7-72.8V clamping voltage. The primary difference is peak pulse current and power dissipation: the 5KP45A handles 68.8-70.2A at 5000W, while the 15KPA45A handles 207.4A at 15000W. The 15KPA45A is suitable for higher-energy transient events.

Q: Is the 5KP48A a suitable substitute for the 5KP45A-E3/73?

A: The 5KP48A is not a direct substitute. It operates at a higher voltage class (48V standoff vs. 45V standoff) with a higher clamping voltage (77.4V vs. 72.7V). Substitution is only appropriate if the circuit design can tolerate increased voltage protection levels.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed (5KP45A, 5KP45A-TP, 5KP48A, and 15KPA45A) are confirmed ROHS3 compliant. The P6KE51A compliance status should be verified with the manufacturer.

Q: What are the critical parameters for TVS diode substitution?

A: The critical parameters are reverse standoff voltage, clamping voltage, peak pulse current rating, power dissipation, operating temperature range, and package type. Substitutes must maintain the same voltage protection class and thermal specifications. Peak pulse current may vary based on application energy requirements.

Q: Can I substitute based on peak pulse current alone?

A: No. Voltage parameters (standoff and clamping) are the primary substitution criteria. Peak pulse current and power rating determine whether a part can handle the transient energy in a specific application, but voltage compatibility is mandatory for circuit protection function.