5KP15A-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP15A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient 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 active in production with 807 units in stock. Alternative equivalent parts are available to support supply chain flexibility, design optimization, and application-specific requirements such as automotive qualification or alternative packaging formats.

Substiute Parts

5KP15A-B

Littelfuse Inc.In Stock: 8475KP15A-B Datasheet

Current PartRFQ

SLD15U-017-B

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

DirectRFQ

5KP15A

Littelfuse Inc.In Stock: 43895KP15A Datasheet

MFR RecommendedRFQ

5KP15A-TP

Micro Commercial CoIn Stock: 13345KP15A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP15A-B is determined by the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 15V, breakdown minimum of 16.7V, and clamping voltage maximum of 24.4V at peak pulse current
• Peak Pulse Current: 209A at 10/1000µs pulse duration
• Power Dissipation: 5000W peak pulse power rating
• Mounting Configuration: Through-hole axial package format
• Operating Temperature: -55°C to 175°C junction temperature range
• Compliance: ROHS3 compliance and MSL Level 1 rating

Substitute parts must maintain electrical equivalence across all voltage parameters and current ratings. Package variations (P600 vs. R-6) are acceptable provided the through-hole axial mounting configuration is preserved. Manufacturer differences and series designations do not affect functional substitution when electrical specifications are identical.

Parameter Comparison

Engineering Selection Recommendations

5KP15A-B (Primary Part): Littelfuse bulk packaging format. Suitable for general-purpose applications requiring standard through-hole P600 axial package configuration. ROHS3 compliant with unlimited moisture sensitivity rating.

SLD15U-017-B (Direct Equivalent): Littelfuse SLD series with identical electrical specifications and P600 package. Includes AEC-Q101 automotive qualification, making this part suitable for automotive-grade applications requiring enhanced reliability standards. Bulk packaging format. Higher inventory availability (1116 units).

5KP15A (Manufacturer Recommended): Littelfuse 5KP series in cut-tape packaging. Electrically equivalent with identical P600 axial package. Highest inventory availability (4283 units). Suitable for high-volume production environments where cut-tape format is preferred for automated assembly.

5KP15A-TP (Alternative Manufacturer): Micro Commercial Co equivalent with identical electrical ratings. Uses R-6 axial package instead of P600. Cut-tape packaging format. Peak pulse current specification not provided in documentation. Suitable for applications where R-6 package footprint is acceptable and alternative sourcing is required.

All substitute parts maintain full electrical equivalence and compliance requirements. Selection should be based on packaging format preference, inventory availability, and application-specific qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can 5KP15A-B be directly replaced with SLD15U-017-B? A: Yes. Both parts share identical voltage ratings (15V standoff, 16.7V breakdown minimum, 24.4V clamping maximum), peak pulse current (209A), power dissipation (5000W), operating temperature range (-55°C to 175°C), and through-hole axial mounting configuration. The primary difference is automotive qualification (AEC-Q101) on the SLD15U-017-B variant.

Q: What is the difference between P600 and R-6 packages? A: Both are through-hole axial package formats for TVS diodes. P600 and R-6 represent different physical package designations from different manufacturers. Electrical performance is equivalent when specifications match. Package selection depends on PCB footprint design and assembly equipment compatibility.

Q: Is the 5KP15A-TP suitable as a substitute if peak pulse current is not specified? A: The 5KP15A-TP maintains all other critical electrical parameters (voltage ratings, power dissipation, temperature range) and is electrically equivalent. However, the absence of peak pulse current specification in available documentation should be clarified with the supplier before selection for critical applications.

Q: Why does SLD15U-017-B have AEC-Q101 qualification while 5KP15A-B does not? A: AEC-Q101 is an automotive-grade qualification standard. SLD15U-017-B is specifically qualified for automotive applications, while 5KP15A-B is designated for general-purpose use. Both meet ROHS3 compliance and MSL Level 1 requirements. Selection depends on whether automotive qualification is required for the application.

Q: Can these parts be used interchangeably in production? A: Yes, provided the application requirements are met. All substitute parts are electrically equivalent and maintain identical voltage, current, and temperature specifications. Packaging format (bulk vs. cut-tape) and package type (P600 vs. R-6) should be verified against PCB design and assembly process requirements before implementation.

Q: What inventory considerations should guide part selection? A: 5KP15A has the highest inventory (4283 units), followed by SLD15U-017-B (1116 units) and 5KP15A-TP (1284 units). 5KP15A-B has 807 units available. Inventory levels may influence lead time and supply chain continuity decisions.