5KP18E3/TR13 Equivalent & Substitute Parts

Part Overview

The 5KP18E3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This component features an 18V reverse standoff voltage with a 32.2V maximum clamping voltage and 155A peak pulse current capability. The device is housed in a P600 axial through-hole package and supplied on tape and reel. The part maintains active product status and is fully RoHS3 compliant.

Equivalent and substitute parts are identified based on matching or compatible electrical characteristics including reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and power dissipation ratings. Substitute parts may differ in packaging format, peak pulse current capacity, or clamping voltage within acceptable operational parameters for general-purpose TVS applications.

Substiute Parts

5KP18E3/TR13

Microchip TechnologyIn Stock: 9665KP18E3/TR13 Datasheet

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5KP18A

Diotec SemiconductorIn Stock: 42185KP18A Datasheet

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5KP18A-TP

Micro Commercial CoIn Stock: 20485KP18A-TP Datasheet

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LCE15A

Littelfuse Inc.In Stock: 2372LCE15A Datasheet

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LCE18A

Littelfuse Inc.In Stock: 1007LCE18A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP18E3/TR13 is determined by the following critical electrical parameters: reverse standoff voltage (18V nominal), breakdown voltage minimum (20V), and power dissipation capability (5000W peak pulse). Parts are grouped as substitutes when they maintain the same 18V reverse standoff voltage and 20V minimum breakdown voltage, which ensures compatible voltage protection thresholds in the target application.

Secondary parameters including clamping voltage, peak pulse current, and package format may vary among substitutes. The 5KP18E3/TR13 specifies a maximum clamping voltage of 32.2V at 155A peak pulse current. Substitute parts with lower peak pulse current ratings or different clamping voltages remain functionally equivalent for applications where the lower current capacity is acceptable. Package variations (P600 versus R-6 versus DO-201) are mechanical considerations that do not affect electrical substitution eligibility but require verification of board layout compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (18V Standoff Voltage, 5000W Power Rating):

The 5KP18A (Diotec Semiconductor) and 5KP18A-TP (Micro Commercial Co) are direct electrical equivalents to the 5KP18E3/TR13. Both parts maintain the 18V reverse standoff voltage, 20V minimum breakdown voltage, and 5000W peak pulse power rating. The 5KP18A offers higher peak pulse current (171A) compared to the original specification (155A), providing enhanced transient suppression capability. The 5KP18A-TP is functionally equivalent but supplied in cut tape format rather than tape and reel, and uses an R-6 package variant instead of P600. All three parts are RoHS3 compliant and suitable for general-purpose TVS applications with identical voltage protection thresholds.

Secondary Substitutes (18V Standoff Voltage, 1500W Power Rating):

The LCE18A (Littelfuse Inc.) maintains the 18V reverse standoff voltage and 20V minimum breakdown voltage but operates at reduced peak pulse power (1500W versus 5000W) and lower peak pulse current (51A versus 155A). This part is suitable for applications with lower transient energy requirements. The LCE18A uses a DO-201 package format and is supplied on cut tape. RoHS3 compliance and operating temperature range (-55 to 175°C) are equivalent to the main part.

Lower Voltage Alternative (15V Standoff Voltage):

The LCE15A (Littelfuse Inc.) operates at a lower 15V reverse standoff voltage with 16.7V minimum breakdown voltage. This part is not a direct substitute for the 5KP18E3/TR13 due to the voltage differential and is applicable only when circuit protection requirements specify 15V standoff characteristics. Peak pulse power is limited to 1500W with 61A peak pulse current. Package format is DO-201 on cut tape.

All substitute parts listed maintain active product status and full RoHS3 compliance. Selection between substitutes depends on application-specific requirements for peak pulse current capacity, power dissipation, package compatibility, and supply format (tape and reel versus cut tape).

Frequently Asked Questions (FAQ)

Q: Can the 5KP18A replace the 5KP18E3/TR13 in my circuit?

A: Yes. The 5KP18A (Diotec Semiconductor) is a direct electrical equivalent with matching 18V reverse standoff voltage, 20V breakdown voltage, and 5000W peak pulse power rating. The 5KP18A provides higher peak pulse current (171A) than the original part (155A), which enhances transient suppression performance. Both parts use P600 axial through-hole packages and are RoHS3 compliant. Verify that your assembly process accommodates tape and reel packaging if switching from the original supply format.

Q: What is the difference between the 5KP18A and 5KP18A-TP?

A: Both parts share identical electrical specifications (18V standoff, 20V breakdown, 5000W power, 29.2V clamping voltage). The primary differences are packaging format and package case style. The 5KP18A is supplied on tape and reel in a P600 axial package, while the 5KP18A-TP is supplied on cut tape in an R-6 axial package. The R-6 package may have different lead spacing or dimensions compared to P600. Verify board layout compatibility before substituting between these variants.

Q: Can I use the LCE18A as a substitute for the 5KP18E3/TR13?

A: The LCE18A is electrically compatible for voltage protection (18V standoff, 20V breakdown, 29.2V clamping) but operates at significantly reduced power capacity (1500W versus 5000W) and lower peak pulse current (51A versus 155A). Use the LCE18A only in applications where transient energy levels are lower than the original design specification. The LCE18A uses a DO-201 package format, which differs mechanically from the P600 package of the main part. Verify that your circuit board layout accommodates the DO-201 package dimensions.

Q: Why is the LCE15A listed as a substitute if it has a different voltage rating?

A: The LCE15A (15V standoff) is not a direct substitute for the 5KP18E3/TR13 (18V standoff). It is listed as an alternative part for applications where 15V protection is acceptable. The voltage difference means the LCE15A will clamp transients at lower voltage levels. Use the LCE15A only when your circuit design specifically requires 15V standoff voltage protection. Do not use this part as a replacement in circuits designed for 18V protection thresholds.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (5KP18A, 5KP18A-TP, LCE18A, and LCE15A) are RoHS3 compliant. The main part 5KP18E3/TR13 is also RoHS3 compliant. All parts are suitable for applications requiring RoHS3 certification.

Q: What is the operating temperature range for substitute parts?

A: The 5KP18E3/TR13, 5KP18A-TP, LCE18A, and LCE15A all operate across -55°C to 175°C. The 5KP18A (Diotec) has a slightly narrower range of -50°C to 175°C. Verify that the reduced lower temperature limit of the 5KP18A is acceptable for your application environment before selection.

Q: Can I mix different substitute parts in the same circuit board assembly?

A: Yes, provided that all parts meet the electrical requirements of your circuit design. Mixing parts with different package formats (P600, R-6, DO-201) on the same board is mechanically feasible but requires careful board layout planning to accommodate different lead spacing and package dimensions. Ensure that your assembly process and test procedures account for multiple package variants if using mixed substitutes.