5KP40A-G Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP40A-G is a unidirectional Zener-type transient voltage suppressor diode manufactured by Comchip Technology, designed for general-purpose overvoltage 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 1099 units in stock. Equivalent and substitute parts are identified to provide procurement flexibility, accommodate supply chain variations, and support design requirements across different packaging and performance specifications.

Substiute Parts

5KP40A-G

Comchip TechnologyIn Stock: 11395KP40A-G Datasheet

Current PartRFQ

A5KP40A-G

Comchip TechnologyIn Stock: 957A5KP40A-G Datasheet

DirectRFQ

15KPA40A

MDE Semiconductor IncIn Stock: 176315KPA40A Datasheet

MFR RecommendedRFQ

5KP40A

Diotec SemiconductorIn Stock: 34645KP40A Datasheet

MFR RecommendedRFQ

5KP40A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 17535KP40A-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 5KP40A-G is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 40V nominal
• Voltage - Breakdown (Min): 44.4V minimum threshold
• Voltage - Clamping (Max) @ Ipp: 64.5V maximum clamping voltage
• Current - Peak Pulse (10/1000µs): 77.52A nominal pulse current
• Power - Peak Pulse: 5000W rated power dissipation
• Mounting Type: Through Hole configuration
• Type: Zener unidirectional TVS diode

Substitute parts are grouped into two categories: direct equivalents (identical electrical and mechanical specifications with packaging variations) and functional equivalents (matching core voltage and power ratings with alternative package types or slightly different current ratings within acceptable tolerance).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Packaging Variation): A5KP40A-G from Comchip Technology is a direct electrical equivalent with identical voltage and current specifications. The primary difference is packaging format (Cut Tape versus Tape & Box). This part is RoHS3 compliant and suitable for direct substitution where tape packaging is acceptable.

Functional Equivalent (Same Voltage Class, Higher Power Rating): 15KPA40A from MDE Semiconductor Inc maintains the 40V reverse standoff voltage and 44.7V breakdown voltage but provides significantly higher peak pulse current (229.5A) and power dissipation (15kW). This part is suitable for applications requiring enhanced transient protection margin. Operating temperature extends to 175°C. RoHS3 compliant.

Functional Equivalent (Same Voltage and Power Class): 5KP40A from Diotec Semiconductor and 5KP40A-E3/54 from Vishay General Semiconductor both match the 40V voltage class and 5kW power rating. The Diotec part offers extended operating temperature to 175°C and is RoHS3 compliant. The Vishay part (TransZorb® series) is RoHS non-compliant and requires compliance verification before use in regulated applications.

Functional Equivalent (Higher Voltage Class): 5KP48A from Littelfuse Inc. operates at 48V reverse standoff voltage with 77.4V clamping voltage. This part is suitable only for applications where higher voltage suppression is required and is not interchangeable for 40V-rated circuits. RoHS3 compliant with extended temperature range to 175°C.

Limited Compatibility: P6KE51A from Fairchild Semiconductor is listed as a substitute but lacks sufficient parameter data for detailed comparison. Verification of electrical specifications is required before selection.

Frequently Asked Questions (FAQ)

Q: Can A5KP40A-G replace 5KP40A-G directly? A: Yes. A5KP40A-G is electrically identical to 5KP40A-G with matching voltage and current specifications. The only difference is packaging format (Cut Tape versus Tape & Box). Both are RoHS3 compliant and suitable for direct substitution.

Q: What is the difference between 5KP40A-G and 15KPA40A? A: Both maintain 40V reverse standoff voltage, but 15KPA40A provides higher peak pulse current (229.5A versus 77.52A) and power dissipation (15kW versus 5kW). The 15KPA40A is suitable for applications requiring greater transient protection margin. Operating temperature extends to 175°C compared to 150°C for the 5KP40A-G.

Q: Can 5KP48A be used instead of 5KP40A-G? A: No. The 5KP48A operates at 48V reverse standoff voltage, which is incompatible with 40V-rated circuits. This part is suitable only for applications specifically designed for 48V suppression.

Q: Is 5KP40A-E3/54 from Vishay suitable for regulated applications? A: The 5KP40A-E3/54 is RoHS non-compliant. Compliance verification is required before use in applications subject to RoHS regulations or customer requirements mandating RoHS compliance.

Q: What package types are available for 40V TVS diodes in this series? A: The 5KP40A-G uses R-6 axial package. Substitute parts use P600 axial package. Both are through-hole configurations. Package selection depends on PCB layout requirements and mechanical constraints.

Q: Are all substitute parts rated for the same operating temperature? A: No. The 5KP40A-G operates from -55°C to 150°C. Most substitutes extend to 175°C. The 5KP40A from Diotec operates from -50°C to 175°C. Temperature range selection depends on application thermal requirements.

Q: Which substitute parts are RoHS3 compliant? A: A5KP40A-G, 15KPA40A, 5KP40A (Diotec), and 5KP48A are all RoHS3 compliant. The 5KP40A-E3/54 from Vishay is RoHS non-compliant.