Equivalent & Substitute Parts for 5KP20 TVS Diode

Part Overview

The 5KP20 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 20V reverse standoff voltage, 5000W peak pulse power rating, and P600 axial through-hole packaging. The 5KP20 is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Substiute Parts

5KP20

Littelfuse Inc.In Stock: 9075KP20 Datasheet

Current PartRFQ

5KP20A

Diotec SemiconductorIn Stock: 172765KP20A Datasheet

DirectRFQ

SLD20U-017-B

Littelfuse Inc.In Stock: 831SLD20U-017-B Datasheet

MFR RecommendedRFQ

5KP20E3/TR13

Microchip TechnologyIn Stock: 11575KP20E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP20 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must be 20V to maintain circuit protection thresholds
• Unidirectional Channels: Must be 1 (single direction protection)
• Power - Peak Pulse: Must be 5000W (5kW) to handle transient energy
• Package / Case: Must be P600, Axial for mechanical and electrical compatibility
• Mounting Type: Must be Through Hole for PCB integration
• Voltage - Clamping (Max) @ Ipp: Must remain within acceptable range (32.4V to 35.8V) to prevent overvoltage stress on protected circuits

All identified substitute parts meet these core requirements while maintaining ROHS3 compliance and operating within the specified temperature range.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SLD20U-017-B (Littelfuse Inc.)

The SLD20U-017-B is the manufacturer-recommended substitute from Littelfuse Inc., the original 5KP20 manufacturer. This part maintains identical reverse standoff voltage (20V), clamping voltage (32.4V), and power rating (5000W). It carries AEC-Q101 automotive qualification and ROHS3 compliance. Operating temperature range matches the original specification (-55°C ~ 175°C). This part is currently active in production with 773 units in stock.

Secondary Substitute: 5KP20A (Diotec Semiconductor)

The 5KP20A provides equivalent electrical performance with a clamping voltage of 32.4V and peak pulse current of 154A. This part is active and widely available (17200 units in stock). Operating temperature range is -50°C ~ 175°C, which covers the majority of industrial applications. ROHS3 compliance is confirmed.

Tertiary Substitute: 5KP20E3/TR13 (Microchip Technology)

The 5KP20E3/TR13 maintains the 20V reverse standoff voltage and 5000W power rating with a clamping voltage of 35.8V. This part is active with 1065 units in stock and offers the widest operating temperature range (-55°C ~ 175°C). ROHS3 compliance is confirmed. The slightly higher clamping voltage should be evaluated against circuit protection requirements.

All three substitutes are ROHS3 compliant and maintain the critical P600 axial through-hole package format required for direct PCB replacement.

Frequently Asked Questions (FAQ)

Q: Can the 5KP20A replace the 5KP20 directly on the PCB?

A: Yes. The 5KP20A maintains identical reverse standoff voltage (20V), power rating (5000W), and P600 axial through-hole package. The clamping voltage of 32.4V is within acceptable tolerance relative to the original 34.02V specification.

Q: What is the difference between the clamping voltages of the substitute parts?

A: The 5KP20A and SLD20U-017-B both clamp at 32.4V, while the 5KP20E3/TR13 clamps at 35.8V. All values remain within the acceptable range for 20V standoff TVS diodes. Selection should be based on the specific overvoltage protection threshold required by the protected circuit.

Q: Are all substitutes available in the same packaging format?

A: All substitutes use the P600 axial through-hole package. However, packaging options differ: the 5KP20A and 5KP20E3/TR13 are available in Tape & Reel format, while the SLD20U-017-B is supplied in bulk. Verify packaging requirements for your procurement and assembly process.

Q: Does the operating temperature range difference between substitutes affect selection?

A: The 5KP20A operates from -50°C to 175°C, while the SLD20U-017-B and 5KP20E3/TR13 operate from -55°C to 175°C. For applications requiring operation below -50°C, the SLD20U-017-B or 5KP20E3/TR13 are required.

Q: Is the SLD20U-017-B suitable for automotive applications?

A: Yes. The SLD20U-017-B carries AEC-Q101 automotive qualification, making it suitable for automotive-grade transient protection applications.

Q: What is the significance of ROHS3 compliance for these parts?

A: ROHS3 compliance confirms that all substitute parts meet Restriction of Hazardous Substances regulations, ensuring compatibility with modern manufacturing and environmental standards.