5KP8.5A-B Equivalent & Substitute Parts

Part Overview

The 5KP8.5A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This through-hole component features an 8.5V reverse standoff voltage and 14.4V maximum clamping voltage, with a peak pulse power rating of 5000W. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified when components share identical or functionally compatible electrical specifications and mechanical form factors, enabling direct replacement in circuit designs without performance degradation.

Substiute Parts

5KP8.5A-B

Littelfuse Inc.In Stock: 11895KP8.5A-B Datasheet

Current PartRFQ

5KP8.5A

LittelfuseIn Stock: 3001105KP8.5A Datasheet

MFR RecommendedRFQ

SA8.5A

Taiwan Semiconductor CorporationIn Stock: 8461SA8.5A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP8.5A-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 8.5V
• Voltage - Clamping (Max) @ Ipp: 14.4V
• Unidirectional Channels: 1
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• RoHS Status: ROHS3 Compliant

Two substitute parts meet these criteria with the following distinctions:

5KP8.5A (Littelfuse): Identical electrical specifications and through-hole axial package (P600). Differs only in packaging format (Tape & Reel vs. Bulk).

SA8.5A (Taiwan Semiconductor Corporation): Matches all critical voltage and temperature parameters. Differs in package form factor (DO-204AC/DO-15 vs. P600) and peak pulse current rating (36A vs. 354.2A), resulting in lower peak pulse power (500W vs. 5000W).

Parameter Comparison

Engineering Selection Recommendations

5KP8.5A (Littelfuse): This substitute provides complete electrical and mechanical equivalence to the 5KP8.5A-B. The only difference is packaging format (Tape & Reel vs. Bulk). Both parts are manufactured by Littelfuse, maintain identical specifications, and carry ROHS3 compliance. This substitute is suitable for direct replacement in all applications where the 5KP8.5A-B is specified.

SA8.5A (Taiwan Semiconductor Corporation): This substitute matches the voltage protection parameters (8.5V standoff, 14.4V clamping) and operating temperature range. However, the SA8.5A features a different package form factor (DO-204AC/DO-15) and significantly lower peak pulse current and power ratings (36A, 500W vs. 354.2A, 5000W). Selection of this substitute requires confirmation that the application's transient energy levels do not exceed 500W peak pulse power and that the DO-204AC package is mechanically compatible with the circuit board layout.

Frequently Asked Questions (FAQ)

Q: Can the 5KP8.5A replace the 5KP8.5A-B directly?

A: Yes. The 5KP8.5A is a direct electrical and mechanical equivalent. The difference is packaging format only (Tape & Reel vs. Bulk). Both parts share identical electrical specifications, the same P600 axial package, and are manufactured by Littelfuse.

Q: Is the SA8.5A a complete substitute for the 5KP8.5A-B?

A: The SA8.5A matches the voltage protection specifications but differs in two critical areas: package form factor (DO-204AC vs. P600) and power handling capability (500W vs. 5000W peak pulse). Use the SA8.5A only if the application's transient energy requirements do not exceed 500W and the DO-204AC package is compatible with your circuit board design.

Q: What determines if a TVS diode can substitute for the 5KP8.5A-B?

A: Substitution requires matching the reverse standoff voltage (8.5V), clamping voltage (14.4V), unidirectional channel configuration (1), through-hole mounting type, and operating temperature range (-55°C to 175°C). Peak pulse current and power ratings must meet or exceed application requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both the 5KP8.5A and SA8.5A are ROHS3 compliant, matching the compliance status of the 5KP8.5A-B.

Q: Does package form factor affect electrical performance?

A: No. The P600 and DO-204AC packages are both axial through-hole configurations with identical electrical performance for the same component specifications. Package selection is determined by circuit board layout and mechanical constraints, not electrical function.