3KP180A-B Equivalent & Substitute Parts

Part Overview

The 3KP180A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose transient voltage protection applications. This component features a 180V reverse standoff voltage rating with a 289V maximum clamping voltage and 10.4A peak pulse current capability in a through-hole P600 axial package.

The 3KP180A-B is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this TVS diode.

Substiute Parts

3KP180A-B

LittelfuseIn Stock: 11133KP180A-B Datasheet

Current PartRFQ

5KP180A-B

Littelfuse Inc.In Stock: 9725KP180A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP180A-B is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 180V
• Voltage - Breakdown (Min): 200V
• Unidirectional configuration (1 channel)
• Type: Zener TVS diode

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: P600, Axial

Operational Compatibility Criteria:

• Operating Temperature Range: -55°C ~ 175°C (TJ)
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

The 5KP180A-B qualifies as a direct substitute based on matching reverse standoff voltage (180V), breakdown voltage (200V), unidirectional channel configuration, through-hole mounting, P600 axial package, operating temperature range, and RoHS3 compliance. While the 5KP180A-B exhibits higher peak pulse current (17.5A vs. 10.4A) and peak pulse power (5000W vs. 3000W), these represent enhanced performance characteristics within the same voltage class and package specification, making it suitable for applications requiring the 3KP180A-B electrical and mechanical interface.

Parameter Comparison

Engineering Selection Recommendations

The 5KP180A-B is the appropriate substitute for the obsolete 3KP180A-B based on the following engineering criteria:

Product Status: The 5KP180A-B maintains Active product status, ensuring continued availability and manufacturer support, whereas the 3KP180A-B is classified as Obsolete.

Regulatory Compliance: Both components are ROHS3 Compliant and carry MSL Rating 1 (Unlimited), meeting current environmental and reliability standards.

Electrical Interface: The 5KP180A-B maintains identical reverse standoff voltage (180V) and breakdown voltage (200V) specifications, ensuring compatibility with existing circuit designs and protection thresholds.

Mechanical Interface: Both components utilize identical through-hole mounting and P600 axial packaging, permitting direct board-level substitution without layout modifications.

Performance Enhancement: The 5KP180A-B provides increased peak pulse current (17.5A vs. 10.4A) and peak pulse power (5000W vs. 3000W) ratings, offering improved transient suppression capability within the same voltage class and package envelope.

Frequently Asked Questions (FAQ)

Q: Can the 5KP180A-B be used as a direct replacement for the 3KP180A-B in existing designs?

A: Yes. The 5KP180A-B is electrically and mechanically compatible with the 3KP180A-B. Both components share identical reverse standoff voltage (180V), breakdown voltage (200V), unidirectional configuration, through-hole mounting, and P600 axial package specifications. The 5KP180A-B can be substituted without circuit redesign or board layout modification.

Q: What are the key differences between the 3KP180A-B and 5KP180A-B?

A: The primary differences are product status and performance ratings. The 3KP180A-B is Obsolete, while the 5KP180A-B is Active. The 5KP180A-B provides higher peak pulse current (17.5A vs. 10.4A) and peak pulse power (5000W vs. 3000W). The clamping voltage is marginally higher (292V vs. 289V). All voltage ratings and package specifications remain identical.

Q: Are there any thermal or environmental considerations when substituting these components?

A: Both components operate across the identical temperature range (-55°C ~ 175°C TJ) and carry the same MSL Rating 1 (Unlimited). No thermal or environmental derating adjustments are required for substitution.

Q: Does the higher peak pulse rating of the 5KP180A-B affect circuit compatibility?

A: No. The higher peak pulse current and power ratings of the 5KP180A-B represent enhanced performance characteristics. These ratings do not introduce incompatibility; they provide additional transient suppression margin within the same voltage class and package specification.

Q: Are both components RoHS compliant?

A: Yes. Both the 3KP180A-B and 5KP180A-B are ROHS3 Compliant, meeting current environmental and regulatory requirements.