3KP180C-B Equivalent & Substitute Parts

Part Overview

The 3KP180C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This bidirectional Zener diode features a 180V reverse standoff voltage and 303.45V maximum clamping voltage with 10.4A peak pulse current capability in a P600 axial through-hole package. The part is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

3KP180C-B

Littelfuse Inc.In Stock: 9943KP180C-B Datasheet

Current PartRFQ

5KP180CA-B

Littelfuse Inc.In Stock: 9795KP180CA-B Datasheet

DirectRFQ

15KPA180CAE3/TR13

Microchip TechnologyIn Stock: 103115KPA180CAE3/TR13 Datasheet

MFR RecommendedRFQ

BZW50-180B

STMicroelectronicsIn Stock: 3337BZW50-180B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3KP180C-B is determined by the following critical parameters:

• Voltage - Reverse Standoff: Must be 180V (±tolerance as per manufacturer specifications)
• Mounting Type: Must be Through Hole to maintain PCB compatibility
• Package / Case: P600 or R-6 axial packages are mechanically compatible
• Bidirectional Channels: Must be 1 (single channel)
• Type: Zener diode construction
• RoHS Compliance: ROHS3 Compliant status required

The three substitute parts listed below meet these core substitution criteria. Differences in clamping voltage, peak pulse current, and power dissipation reflect different product series within the same functional category and do not preclude substitution when application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

5KP180CA-B (Littelfuse Inc.) is the primary direct substitute. It maintains identical reverse standoff voltage (180V), through-hole mounting, and P600 axial package compatibility. The part is in active production status with ROHS3 compliance and REACH unaffected status. Higher peak pulse current (17.5A vs. 10.4A) and increased power dissipation (5000W vs. 3000W) provide enhanced transient protection margin. This part is suitable for direct replacement in existing designs.

15KPA180CAE3/TR13 (Microchip Technology) meets all core substitution criteria with identical reverse standoff voltage and through-hole P600 package. Active product status with ROHS3 compliance and REACH unaffected status. Significantly higher peak pulse current (52.3A) and power dissipation (15000W) indicate this part is designed for higher-energy transient environments. Tape & Reel packaging indicates suitability for automated assembly processes.

BZW50-180B (STMicroelectronics) maintains 180V reverse standoff voltage and through-hole mounting in the R-6 axial package. Active product status with ROHS3 compliance and REACH unaffected status. The R-6 package is mechanically compatible with P600 applications. Notably higher clamping voltage (410V) and peak pulse current (146A at 8/20µs pulse width) reflect the TRANSIL™ series design for high-energy transient suppression. Capacitance specification (750pF @ 1MHz) is provided.

Frequently Asked Questions (FAQ)

Q: Can 5KP180CA-B directly replace 3KP180C-B in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (180V), through-hole mounting, and P600 axial package. The 5KP180CA-B is in active production and provides equivalent or superior electrical performance for the specified voltage class.

Q: What is the difference between P600 and R-6 packages?

A: Both are axial through-hole packages suitable for PCB mounting. P600 and R-6 are mechanically compatible for lead-based insertion, though physical dimensions may vary slightly. Verify PCB pad spacing and lead diameter compatibility for your specific application.

Q: Why does BZW50-180B have higher clamping voltage (410V) than the original part (303.45V)?

A: The BZW50-180B is part of the TRANSIL™ series designed for high-energy transient suppression. Higher clamping voltage reflects different circuit design objectives. Selection depends on your application's maximum allowable clamping voltage specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status, meeting regulatory requirements for hazardous substance restrictions.

Q: What does "Active" product status mean compared to "Obsolete"?

A: Active status indicates the part is in current production with ongoing manufacturer support and availability. Obsolete status indicates the part is no longer manufactured. All substitute parts listed are in active production.

Q: Can I use 15KPA180CAE3/TR13 in manual assembly processes?

A: The 15KPA180CAE3/TR13 is supplied in Tape & Reel packaging, which is optimized for automated pick-and-place assembly. Manual assembly is possible but less efficient than using cut-tape or bulk packaging options.