3KP180 Equivalent & Substitute Parts

Part Overview

The 3KP180 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. Featuring a 180V reverse standoff voltage and 303.45V maximum clamping voltage, this through-hole component provides 3kW peak pulse power dissipation capability. The 3KP180 is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

3KP180

Littelfuse Inc.In Stock: 8733KP180 Datasheet

Current PartRFQ

5KP180A

Littelfuse Inc.In Stock: 3004985KP180A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP180 is determined by the following critical electrical and mechanical parameters:

Voltage Parameters: The reverse standoff voltage (180V typical) and breakdown voltage range (minimum 189.45V) define the protection threshold. Substitute parts must maintain the same 180V standoff specification to ensure equivalent circuit protection performance.

Current and Power Ratings: The peak pulse current (10.4A) and peak pulse power (3kW) establish the energy dissipation capability. Substitute parts with equal or higher ratings provide equivalent or enhanced protection without circuit degradation.

Package and Mounting: The P600 axial through-hole package is a mechanical requirement for board-level compatibility. Substitute parts must use identical packaging to ensure direct replacement without PCB redesign.

Compliance and Status: RoHS3 compliance and active product status ensure long-term availability and regulatory alignment for new designs and ongoing production.

The 5KP180A meets all substitution criteria: identical 180V standoff voltage, P600 axial through-hole package, superior current rating (17.5A), higher power dissipation (5kW), active product status, and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The 5KP180A is the direct substitute for the obsolete 3KP180. Both components share identical voltage protection specifications (180V standoff), package configuration (P600 axial through-hole), and thermal operating range (-55°C to 175°C). The 5KP180A provides superior performance with increased peak pulse current (17.5A versus 10.4A) and higher power dissipation (5kW versus 3kW), enabling enhanced protection margin without circuit modification.

The 5KP180A maintains active product status with full RoHS3 compliance and REACH unaffected designation, ensuring regulatory alignment and long-term procurement availability. Direct pin-for-pin and footprint compatibility eliminates redesign requirements for legacy 3KP180 applications.

Frequently Asked Questions (FAQ)

Q: Can the 5KP180A directly replace the 3KP180 without PCB modification?

A: Yes. Both components use the P600 axial through-hole package with identical pinout and footprint. No PCB redesign is required for direct substitution.

Q: What is the primary difference between the 3KP180 and 5KP180A?

A: The 5KP180A provides higher peak pulse current (17.5A versus 10.4A) and greater power dissipation (5kW versus 3kW) while maintaining the same 180V protection voltage. The 5KP180A is also an active product with guaranteed long-term availability, whereas the 3KP180 is obsolete.

Q: Are the voltage protection characteristics identical between these parts?

A: The reverse standoff voltage is identical at 180V. The 5KP180A has a slightly lower maximum clamping voltage (292V versus 303.45V) and higher minimum breakdown voltage (200V versus 189.45V), both of which represent tighter specification control and improved performance consistency.

Q: What compliance certifications apply to the 5KP180A?

A: The 5KP180A is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement and use.

Q: Is the 5KP180A suitable for the same general-purpose applications as the 3KP180?

A: Yes. Both components are rated for general-purpose transient voltage suppression. The 5KP180A's enhanced current and power ratings make it suitable for applications requiring equal or greater protection capability.