3KP150 Equivalent & Substitute Parts

Part Overview

The 3KP150 is a unidirectional Zener-type Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. It features a 150V reverse standoff voltage with a 255.15V maximum clamping voltage and 12.3A peak pulse current capability. The device is packaged in a P600 axial through-hole configuration.

The 3KP150 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and maintenance requirements for systems utilizing this TVS diode.

Substiute Parts

3KP150

Littelfuse Inc.In Stock: 9133KP150 Datasheet

Current PartRFQ

5KP150A

Littelfuse Inc.In Stock: 33925KP150A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP150 is determined by the following critical electrical and mechanical parameters:

• Voltage Rating Match: Reverse standoff voltage of 150V (±tolerance range)
• Package Compatibility: P600 axial through-hole configuration for direct PCB mounting replacement
• Diode Type: Zener-type unidirectional TVS diode
• Polarity: Single unidirectional channel
• Temperature Range: Operating range of -55°C to 175°C (TJ)
• RoHS Compliance: ROHS3 Compliant status for regulatory alignment

The 5KP150A qualifies as a direct substitute based on matching voltage rating, package type, diode classification, and environmental specifications. The substitute part maintains identical standoff voltage and package configuration while offering enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 5KP150A is a qualified substitute for the obsolete 3KP150 based on the following engineering criteria:

Voltage Compatibility: Both parts maintain identical 150V reverse standoff voltage ratings, ensuring equivalent circuit protection thresholds.

Package Equivalence: Both devices utilize the P600 axial through-hole package, enabling direct PCB footprint compatibility without layout modifications.

Regulatory Compliance: Both parts are ROHS3 Compliant, meeting current environmental and hazardous substance restrictions.

Product Availability: The 5KP150A maintains active product status with established supply chain availability, addressing the obsolescence of the 3KP150.

Performance Enhancement: The 5KP150A provides superior electrical performance with increased peak pulse current (21A vs. 12.3A) and peak pulse power (5000W vs. 3000W), offering enhanced transient suppression capability within the same voltage class and package footprint.

Frequently Asked Questions (FAQ)

Q: Can the 5KP150A be used as a direct replacement for the 3KP150 in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (150V), package configuration (P600 axial), and operating temperature range (-55°C to 175°C). The 5KP150A can be substituted without PCB modifications or circuit redesign.

Q: What are the key differences between the 3KP150 and 5KP150A?

A: The primary differences are product status (obsolete vs. active) and electrical performance. The 5KP150A offers higher peak pulse current (21A vs. 12.3A) and peak pulse power (5000W vs. 3000W), while maintaining the same voltage rating and package type. The 5KP150A also features a lower maximum clamping voltage (243V vs. 255.15V).

Q: Are there any compatibility concerns when substituting the 5KP150A for the 3KP150?

A: No compatibility concerns exist for standard through-hole PCB applications. Both parts are Zener-type unidirectional TVS diodes in identical P600 axial packages with matching voltage ratings and temperature specifications.

Q: Does the 5KP150A require different handling or storage procedures?

A: No. Both parts share identical moisture sensitivity level (MSL 1 - Unlimited), indicating no special moisture control requirements during storage or handling.

Q: What is the basis for substitution between these two parts?

A: Substitution is based on matching electrical parameters (150V reverse standoff voltage), identical package configuration (P600 axial through-hole), equivalent diode type (Zener unidirectional), and overlapping operating temperature ranges. The 5KP150A is the active-status equivalent from the same manufacturer.