Equivalent & Substitute Parts for 3KP16C-B TVS Diode

Part Overview

The 3KP16C-B is a 16V Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This bidirectional Zener diode features a 27.3V maximum clamping voltage and 115.4A peak pulse current capability in a through-hole P600 axial package. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

3KP16C-B

Littelfuse Inc.In Stock: 9813KP16C-B Datasheet

Current PartRFQ

5KP16CA-B

Littelfuse Inc.In Stock: 8415KP16CA-B Datasheet

DirectRFQ

3KP16CA-TP

Micro Commercial CoIn Stock: 9173KP16CA-TP Datasheet

MFR RecommendedRFQ

5KP16CE3/TR13

Microchip TechnologyIn Stock: 8995KP16CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 3KP16C-B is determined by the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 16V and breakdown voltage minimum of 16.88V
• Clamping Voltage: Maximum clamping voltage at peak pulse current (Ipp)
• Peak Pulse Current: 115.4A capability at 10/1000µs pulse width
• Power Dissipation: 3000W peak pulse power rating
• Package Type: Through-hole P600 axial configuration
• Temperature Range: -55°C to 175°C operating range
• Bidirectional Channels: Single channel, bidirectional protection

Substitute parts must maintain compatibility across these parameters while meeting or exceeding the original specifications. Parts with higher power ratings or improved clamping characteristics are acceptable substitutes provided they maintain the same voltage class and package footprint.

Parameter Comparison

Engineering Selection Recommendations

5KP16CA-B (Littelfuse Inc.) is the primary substitute for the 3KP16C-B. Both parts are manufactured by Littelfuse Inc., share identical voltage ratings (16V standoff), and maintain the same P600 axial package. The 5KP16CA-B offers enhanced performance with 196.2A peak pulse current and 5000W power dissipation compared to the original 115.4A and 3000W specifications. The clamping voltage is lower at 26V versus 27.3V, providing improved transient suppression. This part is currently in active production status with ROHS3 compliance.

3KP16CA-TP (Micro Commercial Co) provides an alternative with identical electrical performance to the original part (115.4A peak pulse current, 3000W power dissipation, 26V clamping voltage). However, this substitute uses an R-6 axial package instead of the P600 package, requiring PCB layout verification for mechanical compatibility. This part is active and REACH compliant.

5KP16CE3/TR13 (Microchip Technology) is suitable for applications requiring higher transient current handling (174A peak pulse) and 5000W power dissipation. The clamping voltage is 28.8V, slightly higher than the original specification. This part maintains the P600 package and is supplied in tape and reel format. It is active, ROHS3 compliant, and REACH compliant.

All three substitutes maintain the 16V voltage class, -55°C to 175°C operating temperature range, and bidirectional protection capability required for direct replacement in general-purpose transient protection circuits.

Frequently Asked Questions (FAQ)

Q: Can the 5KP16CA-B replace the 3KP16C-B in all applications?

A: Yes, the 5KP16CA-B is a direct substitute. It maintains the same 16V voltage rating, P600 package, and operating temperature range. The improved current handling (196.2A versus 115.4A) and power dissipation (5000W versus 3000W) make it suitable for the same circuit applications with enhanced protection margin.

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

A: Both are through-hole axial packages for TVS diodes. The P600 and R-6 differ in physical dimensions and lead spacing. The 3KP16CA-TP uses the R-6 package, which may require PCB layout modification compared to the original P600 footprint. Verify mechanical compatibility before substitution.

Q: Why does the 5KP16CE3/TR13 have a higher clamping voltage (28.8V) than the original (27.3V)?

A: The 5KP16CE3/TR13 is rated for higher peak pulse current (174A) and power dissipation (5000W). The slightly higher clamping voltage is a characteristic of this higher-power device. For applications sensitive to clamping voltage, verify that 28.8V remains within acceptable circuit limits.

Q: Are all substitutes ROHS3 compliant?

A: The 5KP16CA-B and 5KP16CE3/TR13 are explicitly ROHS3 compliant. The 3KP16CA-TP compliance status is not specified in the provided data. Verify RoHS compliance requirements with the manufacturer if this is a procurement requirement.

Q: Can I use the higher-power 5KP series parts as direct replacements?

A: Yes. The 5KP16CA-B and 5KP16CE3/TR13 are rated for higher peak pulse current and power dissipation than the original 3KP16C-B. These enhanced specifications make them suitable for the same 16V protection applications with improved transient handling capability.