Equivalent & Substitute Parts for 5KP17A-B

Part Overview

The 5KP17A-B is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This through-hole component operates across a temperature range of -55°C to 175°C and is ROHS3 compliant. The part is currently active in production with 833 units in stock. Substitute parts are identified when equivalent electrical performance can be achieved within the specified voltage and current parameters while maintaining through-hole mounting compatibility.

Substiute Parts

5KP17A-B

LittelfuseIn Stock: 8795KP17A-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

5KP17A

Littelfuse Inc.In Stock: 36315KP17A Datasheet

MFR RecommendedRFQ

P6KE20A

Fairchild SemiconductorIn Stock: 1547P6KE20A Datasheet

MFR RecommendedRFQ

1.5KE18A

Taiwan Semiconductor CorporationIn Stock: 33821.5KE18A Datasheet

MFR RecommendedRFQ

5KP17A-TP

Micro Commercial CoIn Stock: 15205KP17A-TP Datasheet

MFR RecommendedRFQ

P6KE18A

Fairchild SemiconductorIn Stock: 45230P6KE18A Datasheet

MFR RecommendedRFQ

P6KE20A

Fairchild SemiconductorIn Stock: 1547P6KE20A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP17A-B is determined by the following criteria:

Primary Electrical Parameters:

• Voltage - Reverse Standoff (Typ): 17V nominal
• Voltage - Breakdown (Min): 18.9V minimum
• Voltage - Clamping (Max) @ Ipp: 27.6V maximum
• Current - Peak Pulse (10/1000µs): Must support transient protection requirements
• Power - Peak Pulse: 5000W (5kW) rating

Mechanical & Environmental Parameters:

• Mounting Type: Through Hole
• Operating Temperature: -55°C ~ 175°C (TJ)
• Unidirectional Configuration: Single channel
• Compliance: ROHS3 Compliant

Substitute parts are grouped into two categories based on power dissipation capability:

Category A - Full Power Rating (5kW): Parts maintaining the 5000W peak pulse power specification with P600 or equivalent axial packages.

Category B - Reduced Power Rating (1.5kW or 600W): Parts with lower peak pulse power ratings but compatible voltage parameters, suitable for applications with reduced transient current requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Category A - Full Power Rating):

The 5KP17A (Littelfuse Inc., Cut Tape packaging) and 5KP17A-TP (Micro Commercial Co, R-6 package) are direct electrical equivalents to the 5KP17A-B. Both maintain identical voltage specifications (17V reverse standoff, 18.9V breakdown minimum, 27.6V clamping maximum) and 5000W peak pulse power rating. Selection between these options depends on packaging requirements: P600 for the original 5KP17A-B, or R-6 for the 5KP17A-TP variant. All three parts are ROHS3 compliant and rated for -55°C to 175°C operation.

Reduced Power Alternatives (Category B - 1.5kW Rating):

The 1.5KE18A and 1.5KE20A (Taiwan Semiconductor Corporation) provide voltage clamping performance within acceptable ranges (25.5V and 27.7V respectively) but with reduced peak pulse current (60A and 56A) and lower power dissipation (1500W). These parts are suitable for applications where transient energy levels are lower than the 5kW specification. Both are ROHS3 compliant with -55°C to 175°C operating temperature range.

Low Power Alternatives (Category B - 600W Rating):

The P6KE18A and P6KE20A (Fairchild Semiconductor) offer voltage clamping compatible with the original specification but with significantly reduced peak pulse current (25A and 22A) and 600W power dissipation. These parts are appropriate only for low-energy transient protection applications. Operating temperature range is -50°C to 175°C. RoHS compliance status is not specified for these parts.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance except the P6KE series, for which compliance information is not provided. Selection should prioritize parts with confirmed ROHS3 status when regulatory compliance is required.

Frequently Asked Questions (FAQ)

Q: Can the 5KP17A-B be replaced with the 1.5KE18A or 1.5KE20A?

A: These parts are electrically compatible for voltage protection but have significantly lower peak pulse current ratings (60A and 56A versus 184.8A) and reduced power dissipation (1500W versus 5000W). Substitution is valid only if the application's transient current and energy requirements are within the lower specifications of the 1.5KE series.

Q: What is the difference between the 5KP17A-B and 5KP17A?

A: Both parts are electrically identical with matching voltage and power specifications. The primary difference is packaging: 5KP17A-B is supplied in Bulk packaging, while 5KP17A is supplied in Cut Tape (CT) packaging. Selection depends on procurement and assembly requirements.

Q: Why do the P6KE18A and P6KE20A have lower peak pulse current ratings?

A: The P6KE series is designed for lower-energy transient protection applications. With 600W peak pulse power and peak currents of 22-25A, these parts are suitable for circuits with reduced transient stress compared to the 5kW-rated 5KP series.

Q: Are all substitute parts through-hole mounted?

A: Yes, all listed substitutes are through-hole mounted components. Package variations include P600 (original), R-6, DO-201AA/DO-27, and DO-204AC/DO-15 formats, all compatible with through-hole PCB assembly.

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

A: The 5KP17A-B, 5KP17A, 5KP17A-TP, 1.5KE18A, and 1.5KE20A all operate from -55°C to 175°C. The P6KE18A and P6KE20A operate from -50°C to 175°C, with a 5°C minimum temperature limitation.

Q: Which substitute parts are ROHS3 compliant?

A: The 5KP17A, 5KP17A-TP, 1.5KE18A, and 1.5KE20A are confirmed ROHS3 compliant. The P6KE18A and P6KE20A do not have specified RoHS compliance information in the provided data.