Equivalent & Substitute Parts for 3KP48A TVS Diode

Part Overview

The 3KP48A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 48V reverse standoff voltage with a 77.4V maximum clamping voltage and 3000W peak pulse power rating. The part is currently classified as obsolete, making identification of suitable equivalent and substitute components essential for ongoing design support and procurement.

Substiute Parts

3KP48A

Littelfuse Inc.In Stock: 12603KP48A Datasheet

Current PartRFQ

5KP48A

Littelfuse Inc.In Stock: 88785KP48A Datasheet

DirectRFQ

30KP48A-TP

Micro Commercial CoIn Stock: 89830KP48A-TP Datasheet

MFR RecommendedRFQ

3KP48A-TP

Micro Commercial CoIn Stock: 14283KP48A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP48A is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff: 48V (required match)
• Voltage - Breakdown (Min): 53.3V (required match)
• Voltage - Clamping (Max) @ Ipp: 77.4V (required match)
• Unidirectional configuration with single channel
• Operating temperature range: -55°C to 175°C

Mechanical Compatibility Criteria:

• Through-hole mounting type
• Axial package orientation
• P600 or R-6 package variants (both axial through-hole configurations)

Acceptable Variations:

• Peak pulse current (Ipp) may vary upward without functional impact
• Peak pulse power rating may exceed the original specification
• Packaging format may transition from Tape & Reel (TR) to Cut Tape (CT) or alternative supplier packaging
• Manufacturer may differ provided all electrical and mechanical parameters align

The substitute parts identified maintain identical voltage specifications and mounting characteristics, ensuring direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

3KP48A-TP (Micro Commercial Co) is the primary direct equivalent. This part maintains identical electrical specifications (48V standoff, 53.3V breakdown, 77.4V clamping, 3000W power rating) and thermal operating range. The transition from P600 to R-6 package represents a minor mechanical variation within the axial through-hole category. Product status is active with established supply availability. RoHS3 compliance and unlimited moisture sensitivity level (MSL 1) match the original specification.

5KP48A (Littelfuse) provides an upgraded alternative with identical voltage characteristics but increased peak pulse power capacity (5000W versus 3000W) and higher peak pulse current (65.9A versus 38.8A). This part is manufactured by the original equipment supplier and maintains active product status. Selection of this substitute is appropriate when circuit design permits utilization of the enhanced power dissipation capability.

30KP48A-TP (Micro Commercial Co) represents a high-power variant with significantly elevated peak pulse power rating (30000W). While voltage specifications remain compatible (48V standoff, 53.6V breakdown minimum, 81.6V clamping maximum), the higher clamping voltage introduces a minor deviation. This substitute is suitable only for applications where the enhanced power handling and slightly elevated clamping voltage are acceptable design parameters.

All substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity rating, and the required operating temperature range of -55°C to 175°C.

Frequently Asked Questions (FAQ)

Q: Can 3KP48A-TP directly replace 3KP48A in existing circuit designs?

A: Yes. The 3KP48A-TP maintains identical electrical specifications across all critical parameters: 48V reverse standoff voltage, 53.3V minimum breakdown voltage, 77.4V maximum clamping voltage, and 3000W peak pulse power rating. The package transition from P600 to R-6 represents a compatible axial through-hole variant. Both components are suitable for direct substitution in circuit applications.

Q: What is the difference between 3KP48A and 5KP48A?

A: Both parts share identical voltage specifications (48V standoff, 53.3V breakdown, 77.4V clamping). The primary distinction is power rating: 3KP48A is rated for 3000W peak pulse power with 38.8A peak pulse current, while 5KP48A is rated for 5000W peak pulse power with 65.9A peak pulse current. Selection between these parts depends on circuit transient energy requirements. The 5KP48A provides enhanced protection margin for higher-energy transient events.

Q: Is the R-6 package compatible with P600 footprints?

A: Both R-6 and P600 are axial through-hole package configurations suitable for through-hole PCB mounting. While the physical dimensions may differ slightly, both are standard axial diode packages. PCB design review is necessary to confirm mechanical compatibility with existing board layouts. Electrical functionality remains identical regardless of package variant.

Q: Why is 3KP48A listed as obsolete?

A: Product obsolescence reflects manufacturer discontinuation decisions. Active equivalent parts (3KP48A-TP, 5KP48A) are available from current suppliers and maintain identical or superior electrical specifications. Transition to active alternatives ensures continued design support and supply chain reliability.

Q: Can 30KP48A-TP be used as a direct replacement for 3KP48A?

A: The 30KP48A-TP maintains compatible voltage standoff (48V) and operating temperature range. However, the maximum clamping voltage is 81.6V compared to 77.4V for the original part, representing a 4.2V deviation. This substitute is acceptable only when circuit design permits the higher clamping voltage specification. The significantly elevated power rating (30000W) provides substantial protection margin for high-energy transient applications.

Q: What compliance certifications apply to all substitute parts?

A: All identified substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) ratings. Operating temperature range across all parts is -55°C to 175°C (junction temperature). These specifications ensure compatibility with standard industrial and commercial electronic assembly requirements.