Littelfuse 3KP110C Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The Littelfuse 3KP110C is a bidirectional Zener transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. Rated at 110V reverse standoff voltage with a 3000W peak pulse power rating, this component provides transient suppression in through-hole P600 axial packaging. The 3KP110C is classified as obsolete, necessitating identification of functionally equivalent active alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Substiute Parts

3KP110C

Littelfuse Inc.In Stock: 8003KP110C Datasheet

Current PartRFQ

5KP110CA

Littelfuse Inc.In Stock: 12745KP110CA Datasheet

DirectRFQ

15KP110CA-TP

Micro Commercial CoIn Stock: 91615KP110CA-TP Datasheet

MFR RecommendedRFQ

3KP110CA-TP

Micro Commercial CoIn Stock: 11143KP110CA-TP Datasheet

MFR RecommendedRFQ

5KP110CA-TP

Micro Commercial CoIn Stock: 7105KP110CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP110C is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 110V
• Bidirectional Channels: 1
• Type: Zener
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C to 175°C (TJ)

Allowable Variation Parameters:

• Voltage - Clamping (Max) @ Ipp: Substitute values must not exceed the original specification to ensure protection integrity
• Current - Peak Pulse (10/1000µs): Substitute values may equal or exceed the original specification
• Power - Peak Pulse: Substitute values may equal or exceed the original specification
• Package / Case: P600 or R-6 axial packages are mechanically compatible for through-hole mounting

The substitute parts listed below maintain the 110V standoff voltage rating and zener bidirectional topology while offering improved power handling or active product status. Package variations (P600 to R-6) are acceptable as both are through-hole axial configurations with equivalent mechanical footprints.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 5KP110CA (Littelfuse)

The 5KP110CA maintains Littelfuse manufacturing continuity while offering superior power handling (5000W vs. 3000W). This part is active, ROHS3 compliant, and available in the original P600 axial package. The increased peak pulse current (28.8A) and clamping voltage (177V) provide enhanced transient suppression capability without compromising circuit protection thresholds.

Secondary Recommendation: 3KP110CA-TP (Micro Commercial Co)

The 3KP110CA-TP provides electrical equivalence with identical power rating (3000W) and peak pulse current (16.9A) to the original 3KP110C. This part is active and maintains the same thermal operating range. The R-6 axial package is mechanically compatible with P600 through-hole mounting footprints. Selection of this part is appropriate when power handling requirements match the original specification exactly.

Alternative Recommendation: 5KP110CA-TP (Micro Commercial Co)

The 5KP110CA-TP offers increased power handling (5000W) in the R-6 axial package. This part is active and ROHS3 compliant, suitable for applications requiring enhanced transient suppression margin while maintaining 110V standoff voltage protection.

High-Power Alternative: 15KP110CA-TP (Micro Commercial Co)

The 15KP110CA-TP provides maximum transient suppression capability with 15000W peak pulse power rating and 178V clamping voltage. This part is active and ROHS3 compliant, appropriate for high-energy transient environments or applications requiring extended protection margin. The R-6 axial package is mechanically compatible with original through-hole mounting requirements.

Frequently Asked Questions (FAQ)

Q: Can I use the 5KP110CA as a direct replacement for the 3KP110C?

A: Yes. Both parts maintain 110V reverse standoff voltage, identical operating temperature range (-55°C to 175°C), and through-hole axial mounting. The 5KP110CA provides increased power handling (5000W vs. 3000W) and peak pulse current (28.8A vs. 16.9A), making it a functionally superior substitute. The clamping voltage (177V) is lower than the original (185.85V), providing improved protection characteristics.

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

A: Both P600 and R-6 are through-hole axial package configurations suitable for PCB mounting. The packages are mechanically compatible for standard through-hole applications. Selection between them depends on PCB footprint design and lead spacing requirements specific to your application.

Q: Are all substitute parts RoHS3 compliant?

A: The 5KP110CA, 5KP110CA-TP, and 15KP110CA-TP are confirmed ROHS3 compliant. The 3KP110CA-TP RoHS status is not specified in available documentation. Verify RoHS compliance requirements with your procurement specifications before final part selection.

Q: Which substitute part should I select if my circuit requires exactly 3000W power handling?

A: The 3KP110CA-TP provides identical 3000W power rating and 16.9A peak pulse current to the original 3KP110C. This part maintains electrical equivalence while offering active product status and availability.

Q: Can I use the 15KP110CA-TP in place of the 3KP110C?

A: Yes. The 15KP110CA-TP maintains the critical 110V standoff voltage and zener bidirectional topology. The increased power handling (15000W) and clamping voltage (178V) provide enhanced transient suppression without compromising circuit protection. This part is appropriate when higher transient energy margins are acceptable or beneficial.

Q: What are the key electrical parameters that must match for substitution?

A: The reverse standoff voltage (110V), zener type, bidirectional channel configuration (1), and operating temperature range (-55°C to 175°C) must remain constant. Clamping voltage, peak pulse current, and power rating may be equal to or exceed the original specification without affecting substitution validity.