Equivalent & Substitute Parts for 3KP110A-B

Part Overview

The 3KP110A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 110V reverse standoff voltage with a 177V maximum clamping voltage and 16.9A peak pulse current capability in a through-hole P600 axial package. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

3KP110A-B

Littelfuse Inc.In Stock: 8133KP110A-B Datasheet

Current PartRFQ

5KP110A-B

Littelfuse Inc.In Stock: 8275KP110A-B Datasheet

DirectRFQ

3KP110A-TP

Micro Commercial CoIn Stock: 10143KP110A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP110A-B is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Voltage - Reverse Standoff (Typ): 110V
• Voltage - Breakdown (Min): 122V
• Voltage - Clamping (Max) @ Ipp: 177V
• Operating Temperature Range: -55°C to 175°C (TJ)
• Type: Zener, Unidirectional

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole
• Package / Case: Axial configuration

Acceptable Variation:

• Current - Peak Pulse (10/1000µs): Equal or greater than 16.9A
• Power - Peak Pulse: Equal or greater than 3000W

Substitute parts must maintain identical voltage specifications and operating temperature range while supporting equal or higher current and power ratings. Package compatibility requires through-hole axial mounting with equivalent physical dimensions.

Parameter Comparison

Engineering Selection Recommendations

5KP110A-B (Littelfuse Inc.): This substitute maintains identical voltage specifications and operating temperature range while providing enhanced current handling (28.8A versus 16.9A) and power dissipation (5000W versus 3000W). The component uses the same P600 axial package and is manufactured by the original equipment supplier with active product status and ROHS3 compliance. Selection of this part is appropriate for applications requiring equivalent or higher transient protection capability.

3KP110A-TP (Micro Commercial Co): This substitute provides electrical equivalence with matching voltage specifications, current rating (16.9A), and power dissipation (3000W). The component maintains the same operating temperature range and through-hole axial mounting configuration. The package designation differs (R-6 versus P600), requiring physical verification of board layout compatibility. The part carries REACH Unaffected status and active product availability.

Frequently Asked Questions (FAQ)

Q: Can the 5KP110A-B be used as a direct replacement for the 3KP110A-B?

A: Yes. The 5KP110A-B maintains all critical electrical parameters (110V standoff, 122V breakdown, 177V clamping) and operating temperature range. The higher current rating (28.8A) and power dissipation (5000W) provide enhanced protection capability. Both components use the P600 axial package and are manufactured by Littelfuse Inc.

Q: What is the difference between the 3KP110A-TP and the original 3KP110A-B?

A: The 3KP110A-TP provides identical electrical specifications and current/power ratings. The primary difference is the package designation: R-6 axial versus P600 axial. Physical dimensions must be verified for PCB compatibility before selection.

Q: Are there package compatibility concerns between substitute parts?

A: The 5KP110A-B uses the same P600 axial package as the original 3KP110A-B, requiring no layout modifications. The 3KP110A-TP uses an R-6 axial package, which may differ in physical dimensions. Board layout verification is necessary before implementation.

Q: Do all substitute parts meet the same compliance standards?

A: The 5KP110A-B and original 3KP110A-B both carry ROHS3 compliance. The 3KP110A-TP carries REACH Unaffected status. Both compliance designations are acceptable for general-purpose applications; specific regulatory requirements should be confirmed for your application.

Q: Why is the 3KP110A-B marked as obsolete?

A: The original part is no longer manufactured by Littelfuse Inc. The 5KP110A-B and 3KP110A-TP represent active alternatives with equivalent or superior electrical performance.