5KP15-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP15-B is a unidirectional Zener-type transient voltage suppressor manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole P600 axial package component operates across a temperature range of -55°C to 175°C and provides 5000W peak pulse power handling capability. The 5KP15-B is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for new designs and ongoing production requirements.

Substiute Parts

5KP15-B

Littelfuse Inc.In Stock: 9055KP15-B Datasheet

Current PartRFQ

5KP15A

Littelfuse Inc.In Stock: 43895KP15A Datasheet

DirectRFQ

5KP15A-B

Littelfuse Inc.In Stock: 8475KP15A-B Datasheet

DirectRFQ

SLD15U-017-B

Littelfuse Inc.In Stock: 1172SLD15U-017-B Datasheet

MFR RecommendedRFQ

5KP15AE3/TR13

Microchip TechnologyIn Stock: 7515KP15AE3/TR13 Datasheet

MFR RecommendedRFQ

5KP15E3/TR13

Microchip TechnologyIn Stock: 10515KP15E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP15-B is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Voltage - Reverse Standoff (Typ): 15V (exact match required)
• Voltage - Breakdown (Min): 16.7V or 15.84V (within tolerance band)
• Power - Peak Pulse: 5000W (5kW) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: P600, Axial (exact match required)
• Type: Zener, Unidirectional (exact match required)
• Operating Temperature Range: -55°C ~ 175°C (exact match required)

Acceptable Variation Parameters:

• Voltage - Clamping (Max) @ Ipp: 24.4V to 26.9V (within functional tolerance for 15V standoff class)
• Current - Peak Pulse (10/1000µs): 186A to 209A (inverse relationship with clamping voltage at constant power)
• Packaging Format: Bulk, Cut Tape, or Tape & Reel (form factor variation acceptable)
• Product Status: Active preferred; obsolete acceptable if electrically equivalent
• Manufacturer: Littelfuse Inc. or Microchip Technology (qualified manufacturers)

All substitute parts listed maintain the core electrical protection characteristics and mechanical compatibility required for direct replacement in 15V transient suppression circuits.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

5KP15A and 5KP15A-B are direct functional equivalents manufactured by Littelfuse Inc. with active product status. Both maintain identical electrical specifications (15V standoff, 16.7V breakdown minimum, 24.4V clamping maximum) and identical power handling (5000W). Selection between these two depends on packaging requirements: 5KP15A is supplied in Cut Tape format suitable for automated assembly, while 5KP15A-B is supplied in Bulk format for manual assembly or inventory management.

Manufacturer-Recommended Substitute (Automotive-Grade):

SLD15U-017-B is the manufacturer-recommended replacement, also from Littelfuse Inc., with active product status and AEC-Q101 automotive qualification. This part is electrically identical to 5KP15A and 5KP15A-B (15V standoff, 16.7V breakdown, 24.4V clamping, 5000W power) and is supplied in Bulk packaging. The automotive qualification provides enhanced reliability assurance for mission-critical applications.

Alternative Substitutes (Cross-Manufacturer Options):

5KP15AE3/TR13 and 5KP15E3/TR13 are manufactured by Microchip Technology with active product status and supplied in Tape & Reel format. Both maintain the 15V standoff and 5000W power specifications. 5KP15AE3/TR13 provides 24.4V clamping (equivalent to 5KP15A series), while 5KP15E3/TR13 provides 26.9V clamping with correspondingly lower peak pulse current (186A versus 209A). The higher clamping voltage of 5KP15E3/TR13 may be suitable for applications with less stringent voltage regulation requirements.

Selection Criteria:

• For direct replacement with identical electrical performance: select 5KP15A, 5KP15A-B, or SLD15U-017-B
• For automated assembly processes: select 5KP15A (Cut Tape) or 5KP15AE3/TR13 (Tape & Reel)
• For manual assembly or bulk inventory: select 5KP15A-B or SLD15U-017-B (Bulk)
• For automotive or high-reliability applications: select SLD15U-017-B (AEC-Q101 qualified)
• For cross-manufacturer sourcing flexibility: select 5KP15AE3/TR13 (Microchip Technology)

All listed substitutes are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original 5KP15-B specifications.

Frequently Asked Questions (FAQ)

Q: Can I use 5KP15E3/TR13 as a direct replacement for 5KP15-B?

A: 5KP15E3/TR13 is electrically compatible for 15V transient suppression applications. However, it has a higher clamping voltage (26.9V versus 25.62V) and lower peak pulse current (186A versus unspecified for 5KP15-B). This part is suitable if your circuit design tolerates the higher clamping voltage. For identical clamping characteristics, use 5KP15A, 5KP15A-B, or SLD15U-017-B instead.

Q: What is the difference between 5KP15A and 5KP15A-B?

A: Both parts are electrically identical with matching specifications (15V standoff, 16.7V breakdown, 24.4V clamping, 209A peak pulse current, 5000W power). The difference is packaging format: 5KP15A is supplied in Cut Tape (CT) format for automated pick-and-place assembly, while 5KP15A-B is supplied in Bulk format for manual assembly or tape-and-reel conversion. Select based on your assembly process requirements.

Q: Is SLD15U-017-B suitable for automotive applications?

A: Yes. SLD15U-017-B carries AEC-Q101 automotive qualification, making it suitable for automotive and mission-critical applications requiring enhanced reliability assurance. It maintains identical electrical specifications to 5KP15A and 5KP15A-B (15V standoff, 16.7V breakdown, 24.4V clamping, 5000W power).

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

A: Yes, provided all selected parts maintain the same voltage class (15V standoff) and power rating (5000W). Parts with identical clamping voltages (5KP15A, 5KP15A-B, SLD15U-017-B, 5KP15AE3/TR13 at 24.4V) are fully interchangeable. 5KP15E3/TR13 with 26.9V clamping may be used if circuit design accommodates the higher clamping voltage. Verify your specific application requirements before mixing parts.

Q: What packaging formats are available for these substitutes?

A: Available packaging formats are Cut Tape (CT) for 5KP15A, Bulk for 5KP15A-B and SLD15U-017-B, and Tape & Reel (TR) for 5KP15AE3/TR13 and 5KP15E3/TR13. All parts use the same P600 axial through-hole package. Select packaging format based on your assembly process: automated assembly typically uses Cut Tape or Tape & Reel, while manual assembly or inventory management uses Bulk format.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (5KP15A, 5KP15A-B, SLD15U-017-B, 5KP15AE3/TR13, 5KP15E3/TR13) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original 5KP15-B specifications.

Q: Which substitute offers the best inventory availability?

A: Based on provided inventory data, 5KP15A offers the highest stock level at 4283 pieces, followed by 5KP15E3/TR13 at 946 pieces, SLD15U-017-B at 1116 pieces, 5KP15A-B at 807 pieces, and 5KP15AE3/TR13 at 662 pieces. Verify current availability with your supplier for production requirements.