3KP220-B Equivalent & Substitute Parts

Part Overview

The 3KP220-B is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 220V reverse standoff voltage rating and a maximum clamping voltage of 389.66V at peak pulse current. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within the same electrical parameter envelope.

Substiute Parts

3KP220-B

Littelfuse Inc.In Stock: 10513KP220-B Datasheet

Current PartRFQ

5KP220A-B

Littelfuse Inc.In Stock: 10705KP220A-B Datasheet

DirectRFQ

15KP220A-TP

Micro Commercial CoIn Stock: 128515KP220A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3KP220-B is determined by the following critical parameters:

• Voltage - Reverse Standoff: Must be 220V (nominal)
• Voltage - Breakdown (Min): Must fall within acceptable range (231.3V minimum for 3KP220-B)
• Mounting Type: Must be Through Hole
• Package / Case: Must be axial configuration (P600 or R-6)
• Type: Must be Zener diode
• Unidirectional Channels: Must be 1
• Operating Temperature Range: Must support -55°C to 175°C (TJ)

The identified substitutes meet these core electrical and mechanical criteria while offering enhanced performance characteristics or active product status.

Parameter Comparison

Engineering Selection Recommendations

5KP220A-B (Littelfuse Inc.) is the direct functional equivalent. This part maintains identical reverse standoff voltage (220V) and operating temperature range while offering improved performance through higher peak pulse power (5000W vs. 3000W) and increased peak pulse current (13.7A vs. 8.1A). The clamping voltage is lower (371.1V vs. 389.66V), providing superior transient suppression. Both parts share the same P600 axial package and are ROHS3 compliant. The 5KP220A-B holds active product status, ensuring long-term availability.

15KP220A-TP (Micro Commercial Co) is the manufacturer-recommended alternative. This part maintains the 220V reverse standoff voltage and identical operating temperature range. It offers the highest peak pulse power rating (15000W) among the three options, with the lowest clamping voltage (356V), delivering maximum transient suppression capability. The R-6 axial package is mechanically compatible with through-hole mounting. This part is ROHS3 and REACH compliant with active product status.

Both substitutes are suitable for direct replacement in applications where the 3KP220-B is currently specified, with the selection between them dependent on available board space and desired performance margin.

Frequently Asked Questions (FAQ)

Q: Can the 5KP220A-B directly replace the 3KP220-B?

A: Yes. Both parts share identical reverse standoff voltage (220V), breakdown voltage range, operating temperature (-55°C to 175°C), and P600 axial package configuration. The 5KP220A-B provides enhanced performance with higher power dissipation capability and lower clamping voltage.

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

A: Both are axial through-hole packages suitable for PCB mounting. The P600 and R-6 designations refer to different physical form factors from different manufacturers. Component lead spacing and body diameter may vary, requiring verification against PCB layout specifications.

Q: Why is the clamping voltage lower in the substitute parts?

A: Lower clamping voltage indicates more effective transient suppression. The 5KP220A-B (371.1V) and 15KP220A-TP (356V) clamp transient overvoltages to lower levels than the 3KP220-B (389.66V), providing enhanced protection for downstream circuitry.

Q: Are all three parts RoHS compliant?

A: Yes. The 3KP220-B, 5KP220A-B, and 15KP220A-TP are all ROHS3 compliant. The 15KP220A-TP additionally carries REACH compliance certification.

Q: Which substitute should be selected for new designs?

A: Selection depends on application requirements. The 5KP220A-B offers a balanced upgrade with improved performance in the same package footprint. The 15KP220A-TP provides maximum power dissipation capability but requires package compatibility verification against PCB layout.