Equivalent & Substitute Parts for 3KP110-B

Part Overview

The 3KP110-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 110V reverse standoff voltage with a 185.85V maximum clamping voltage and 16.9A peak pulse current capability in a through-hole P600 axial package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations.

Substiute Parts

3KP110-B

Littelfuse Inc.In Stock: 11013KP110-B Datasheet

Current PartRFQ

5KP110A-B

Littelfuse Inc.In Stock: 8275KP110A-B Datasheet

DirectRFQ

15KPA110AE3/TR13

Microchip TechnologyIn Stock: 112715KPA110AE3/TR13 Datasheet

MFR RecommendedRFQ

3KP110A-TP

Micro Commercial CoIn Stock: 10143KP110A-TP Datasheet

MFR RecommendedRFQ

5KP110A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 68875KP110A-E3/54 Datasheet

MFR RecommendedRFQ

5KP110AE3/TR13

Microchip TechnologyIn Stock: 9755KP110AE3/TR13 Datasheet

MFR RecommendedRFQ

5KP110E3/TR13

Microchip TechnologyIn Stock: 8175KP110E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 3KP110-B is determined by the following critical parameters:

• Voltage - Reverse Standoff: Must be 110V to maintain circuit protection threshold
• Voltage - Clamping (Max) @ Ipp: Must be within acceptable range for downstream component protection (185.85V reference)
• Current - Peak Pulse: Must meet or exceed 16.9A to handle transient events
• Power - Peak Pulse: Must support 3000W minimum dissipation capability
• Operating Temperature Range: Must span -55°C to 175°C for thermal compatibility
• Mounting Type & Package: Through-hole P600 axial preferred; R-6 axial acceptable with mechanical verification
• Type & Channels: Unidirectional Zener diode configuration required

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (P600 Package): Parts maintaining identical or superior electrical performance with P600 axial packaging.

Category B - Functional Equivalents (Alternative Packages): Parts meeting electrical requirements with package variations requiring mechanical compatibility assessment.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement)

The 5KP110A-B (Littelfuse Inc.) and 5KP110A-E3/54 (Vishay) are the most direct substitutes, maintaining the same 110V reverse standoff voltage, P600 axial package, and operating temperature range. Both parts are in active production status with ROHS3 compliance. The 5KP110A-B provides increased current handling (28.8A vs. 16.9A) and power dissipation (5000W vs. 3000W), offering enhanced protection margin. The 5KP110A-E3/54 delivers equivalent performance with identical clamping voltage (177V) and comparable peak pulse current (28.2A).

High-Performance Alternative

The 15KPA110AE3/TR13 (Microchip Technology) meets all electrical requirements with significantly enhanced specifications: 84.5A peak pulse current and 15000W power dissipation. This part is suitable for applications requiring superior transient suppression capability. All three parts maintain ROHS3 compliance and the required operating temperature range.

Package Variant

The 3KP110A-TP (Micro Commercial Co) provides electrical equivalence with identical peak pulse current (16.9A) and power rating (3000W) but uses an R-6 axial package instead of P600. This part is suitable only if mechanical board layout accommodates R-6 package dimensions.

Compliance Considerations

All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage processes.

Frequently Asked Questions (FAQ)

Q: Can I use 5KP110A-B as a direct replacement for 3KP110-B?

A: Yes. Both parts maintain 110V reverse standoff voltage, P600 axial package, and -55°C to 175°C operating temperature range. The 5KP110A-B provides higher current (28.8A) and power (5000W) ratings, offering improved protection margin without circuit incompatibility.

Q: What is the difference between clamping voltage specifications across substitute parts?

A: Clamping voltage varies between 177V and 196V across substitutes, compared to 185.85V for the original 3KP110-B. All values remain within acceptable transient suppression range for general-purpose applications. Selection depends on specific downstream component voltage tolerance requirements.

Q: Is the 3KP110A-TP with R-6 package compatible with existing PCB layouts designed for P600?

A: No. R-6 and P600 are different axial package formats with distinct lead spacing and physical dimensions. PCB layout modification is required for 3KP110A-TP installation. Verify mechanical compatibility before selection.

Q: Do all substitute parts meet the same compliance standards as 3KP110-B?

A: All recommended substitutes maintain ROHS3 compliance and MSL 1 rating. Microchip and Vishay parts include REACH Unaffected status. Littelfuse 5KP110A-B includes ROHS3 compliance. Compliance documentation should be verified for specific procurement requirements.

Q: Which substitute offers the best performance upgrade?

A: The 15KPA110AE3/TR13 provides the highest performance with 84.5A peak pulse current and 15000W power dissipation, suitable for applications requiring enhanced transient protection. The 5KP110A-B and 5KP110A-E3/54 offer balanced upgrades with doubled power ratings and maintained package compatibility.

Q: Are tape and reel packaged parts (TR13) suitable for manual assembly?

A: Tape and reel packaging is standard for automated pick-and-place assembly. Manual assembly requires cut tape or bulk packaging. Verify packaging format compatibility with assembly process before procurement.