Equivalent & Substitute Parts for 3KP16A-B TVS Diode

Part Overview

The 3KP16A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 16V reverse standoff voltage with a 26V maximum clamping voltage and 115.4A peak pulse current capability in a through-hole P600 axial package. The 3KP16A-B is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Suitable alternatives must maintain identical electrical performance parameters while offering active product status and current availability.

Substiute Parts

3KP16A-B

Littelfuse Inc.In Stock: 8043KP16A-B Datasheet

Current PartRFQ

5KP16A-B

LittelfuseIn Stock: 8685KP16A-B Datasheet

DirectRFQ

3KP16A-TP

Micro Commercial CoIn Stock: 10633KP16A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3KP16A-B is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 16V
• Voltage - Breakdown (Min): 17.8V
• Voltage - Clamping (Max) @ Ipp: 26V
• Current - Peak Pulse (10/1000µs): 115.4A
• Power - Peak Pulse: 3000W
• Operating Temperature Range: -55°C to 175°C
• Mounting Type: Through Hole
• Unidirectional Channels: 1
• Type: Zener

Substitute parts must match all electrical parameters exactly and maintain through-hole axial mounting compatibility. Package variations (P600 vs. R-6) are acceptable provided mechanical fit and lead configuration remain compatible with the original application.

Parameter Comparison

Engineering Selection Recommendations

3KP16A-TP (Micro Commercial Co) is the primary recommended substitute for the obsolete 3KP16A-B. This part maintains identical electrical specifications (16V standoff, 26V clamping, 115.4A peak pulse, 3000W peak power) and operating temperature range. The 3KP16A-TP is currently active in production with confirmed inventory availability. The package variant (R-6 vs. P600) represents a minor mechanical difference in axial through-hole components; both are standard industry formats compatible with typical PCB layouts. REACH compliance is confirmed for the 3KP16A-TP.

5KP16A-B (Littelfuse) is an alternative substitute that maintains all voltage parameters (16V standoff, 26V clamping) and operating temperature specifications identical to the main part. However, the 5KP16A-B exhibits higher current and power ratings (196.2A peak pulse, 5000W peak power) compared to the 3KP16A-B specification. This part is suitable only for applications where the higher power dissipation capability does not create thermal or circuit design conflicts. The 5KP16A-B is active in production with ROHS3 compliance and REACH unaffected status.

Selection between 3KP16A-TP and 5KP16A-B depends on application power requirements. For direct electrical equivalence, 3KP16A-TP is preferred. For applications requiring enhanced transient protection margin, 5KP16A-B provides increased capability.

Frequently Asked Questions (FAQ)

Q: Can the 5KP16A-B replace the 3KP16A-B in all applications?

A: The 5KP16A-B maintains identical voltage parameters (16V standoff, 26V clamping) and operating temperature range. However, it provides higher peak pulse current (196.2A vs. 115.4A) and peak power (5000W vs. 3000W). This substitution is valid for applications where the increased power rating does not introduce thermal management issues or circuit design conflicts. Verify that your application can accommodate the higher power dissipation without exceeding component or PCB thermal limits.

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

A: Both P600 and R-6 are through-hole axial package formats for TVS diodes. The primary difference is the physical package envelope and lead diameter. Both are compatible with standard PCB through-hole mounting. Verify mechanical fit with your specific PCB layout and component placement requirements before substitution.

Q: Is the 3KP16A-TP a direct replacement for the 3KP16A-B?

A: Yes. The 3KP16A-TP matches all critical electrical parameters: 16V reverse standoff voltage, 26V clamping voltage, 115.4A peak pulse current, and 3000W peak power. Operating temperature range is identical (-55°C to 175°C). The 3KP16A-TP is manufactured by Micro Commercial Co and maintains active product status. The R-6 package is mechanically compatible with standard through-hole PCB applications.

Q: Are all substitute parts RoHS compliant?

A: The 3KP16A-B and 5KP16A-B are both ROHS3 compliant. RoHS compliance status for the 3KP16A-TP is not specified in the provided data. Verify RoHS compliance requirements with your supply chain or regulatory documentation if this certification is mandatory for your application.

Q: What is the inventory status for each substitute part?

A: The 3KP16A-TP has 960 pieces in stock. The 5KP16A-B has 831 pieces in stock. Both parts are currently available from active inventory.