5KP16A-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP16A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose transient voltage protection applications. This through-hole component operates across a wide temperature range (-55°C to 175°C) and is RoHS3 compliant. The part is currently in active production status with 831 pieces available in bulk packaging. Finding equivalent and substitute parts is necessary to address supply chain flexibility, packaging preferences, and application-specific requirements while maintaining electrical performance within acceptable parameters.

Substiute Parts

5KP16A-B

LittelfuseIn Stock: 8685KP16A-B Datasheet

Current PartRFQ

1.5KE18A

Taiwan Semiconductor CorporationIn Stock: 33821.5KE18A Datasheet

MFR RecommendedRFQ

1.5KE20A

Taiwan Semiconductor CorporationIn Stock: 304131.5KE20A Datasheet

MFR RecommendedRFQ

5KP16A

Littelfuse Inc.In Stock: 48195KP16A Datasheet

MFR RecommendedRFQ

SLD16U-017

Littelfuse Inc.In Stock: 6148SLD16U-017 Datasheet

MFR RecommendedRFQ

1.5KE18A

Taiwan Semiconductor CorporationIn Stock: 33821.5KE18A Datasheet

MFR RecommendedRFQ

5KP16A-TP

Micro Commercial CoIn Stock: 13375KP16A-TP Datasheet

MFR RecommendedRFQ

P6KE18A

Fairchild SemiconductorIn Stock: 45230P6KE18A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP16A-B is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 16V nominal
• Voltage - Clamping (Max) @ Ipp: 26V maximum
• Current - Peak Pulse (10/1000µs): 196.2A minimum
• Power - Peak Pulse: 5000W minimum
• Unidirectional configuration (1 channel)
• Through-hole mounting
• Operating temperature range: -55°C to 175°C

Substitute Categories:

Category 1: Direct Electrical Equivalents (Same Package)

• 5KP16A (Littelfuse, Cut Tape packaging)
• SLD16U-017 (Littelfuse, automotive-grade, AEC-Q101 qualified)
• 5KP16A-TP (Micro Commercial Co, alternative package variant R-6)

These parts maintain identical or equivalent electrical specifications with the same P600 package footprint, ensuring direct mechanical and electrical compatibility.

Category 2: Reduced Power Rating Substitutes (Lower Peak Pulse Current)

• 1.5KE18A (Taiwan Semiconductor Corporation, 1500W, 60A peak pulse)
• 1.5KE20A (Taiwan Semiconductor Corporation, 1500W, 56A peak pulse)
• P6KE18A (Fairchild Semiconductor, 600W, 25A peak pulse)

These parts operate within the 16V to 20V reverse standoff voltage range with clamping voltages between 25.2V and 27.7V. However, they feature significantly reduced peak pulse current ratings (25A to 60A) and lower power dissipation capabilities (600W to 1500W) compared to the 5KP16A-B. These substitutes are suitable only for applications with lower transient current requirements.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

Select 5KP16A (Littelfuse Inc., Cut Tape packaging) when the original 5KP16A-B bulk packaging is unavailable. This part maintains all electrical specifications and the same P600 package footprint, providing seamless substitution with 4747 pieces currently in stock.

Select SLD16U-017 (Littelfuse Inc.) when automotive-grade qualification is required. This part is AEC-Q101 qualified and maintains identical electrical performance to the 5KP16A-B with 6049 pieces in stock. Note that REACH status differs (REACH Affected vs. REACH Unaffected); verify compliance requirements for your application.

For Alternative Package Consideration:

The 5KP16A-TP (Micro Commercial Co) offers the same electrical specifications with an R-6 package variant. This substitution requires PCB layout verification to confirm mechanical compatibility with the alternative package footprint.

For Reduced Power Applications:

The 1.5KE18A and 1.5KE20A (Taiwan Semiconductor Corporation) are suitable only for applications where peak transient current does not exceed 60A and power dissipation remains below 1500W. These parts operate in the DO-201 package and feature voltage ratings within acceptable tolerance of the 5KP16A-B. High inventory availability (3300 and 30400 pieces respectively) supports supply chain flexibility for lower-power applications.

The P6KE18A (Fairchild Semiconductor) is limited to applications with peak transient currents not exceeding 25A and power dissipation below 600W. The DO-204AC package and reduced power rating restrict this part to low-energy transient protection only. Operating temperature minimum is -50°C (versus -55°C for the primary part).

Compliance Considerations:

All recommended substitutes maintain RoHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating. Verify REACH compliance status for your specific application and supply chain requirements, particularly when selecting SLD16U-017.

Frequently Asked Questions (FAQ)

Q: Can I use 1.5KE18A or 1.5KE20A as direct replacements for 5KP16A-B?

A: These parts are not direct replacements. While they operate within compatible voltage ranges (15.3V to 17.1V reverse standoff), they feature significantly reduced peak pulse current ratings (60A and 56A respectively) compared to the 5KP16A-B (196.2A). Use these substitutes only if your application requires peak transient currents below 60A and power dissipation below 1500W. Verify circuit requirements before substitution.

Q: What is the difference between 5KP16A and 5KP16A-B?

A: The 5KP16A-B is the bulk-packaged version, while 5KP16A is supplied in Cut Tape (CT) packaging. Both parts are electrically identical with the same P600 package footprint and electrical specifications. The packaging difference affects handling and assembly processes but not electrical performance.

Q: Is SLD16U-017 compatible with standard PCB layouts designed for 5KP16A-B?

A: Yes. SLD16U-017 maintains the same P600 axial package footprint and electrical specifications as 5KP16A-B. The primary difference is automotive-grade qualification (AEC-Q101) and REACH status. PCB layout compatibility is confirmed; no design changes are required.

Q: Can I substitute P6KE18A for 5KP16A-B in high-current transient protection circuits?

A: No. P6KE18A is rated for only 25A peak pulse current and 600W power dissipation, making it unsuitable for circuits requiring the 196.2A peak pulse capability of 5KP16A-B. This part is limited to low-energy transient protection applications only. Substitution in high-current circuits will result in component failure.

Q: What package considerations apply when selecting substitute parts?

A: The 5KP16A-B uses P600 axial packaging. Direct substitutes (5KP16A, SLD16U-017) maintain this package. The 5KP16A-TP uses R-6 axial packaging, requiring PCB footprint verification. The 1.5KE series and P6KE18A use DO-201 and DO-204AC packages respectively, which have different lead spacing and require PCB redesign. Confirm mechanical compatibility before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts maintain RoHS3 compliance. MSL Level 1 (Unlimited) moisture sensitivity applies to all parts, eliminating bake-out requirements for standard storage conditions.