3KP48C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 3KP48C is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component features a 48V reverse standoff voltage with 81.27V maximum clamping voltage and 38.8A peak pulse current capability. The product is currently obsolete, making identification of suitable equivalent and substitute parts essential for ongoing system maintenance and new design implementations.

Substiute Parts

3KP48C

Littelfuse Inc.In Stock: 8893KP48C Datasheet

Current PartRFQ

5KP48CA

Diotec SemiconductorIn Stock: 44145KP48CA Datasheet

DirectRFQ

30KP48CA-TP

Micro Commercial CoIn Stock: 81630KP48CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP48C is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 48V
• Voltage - Clamping (Max) @ Ipp: Must be within acceptable range for circuit protection
• Current - Peak Pulse (10/1000µs): Must meet or exceed application requirements
• Power - Peak Pulse: Must support transient energy dissipation

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: P600 or R-6 Axial configurations
• Bidirectional Channels: 1

Compliance Requirements:

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The identified substitute parts maintain the 48V reverse standoff voltage specification while offering enhanced performance characteristics in peak pulse current and power dissipation capabilities. Both substitute parts are active products with current manufacturing status, addressing the obsolescence of the original 3KP48C component.

Parameter Comparison

Engineering Selection Recommendations

5KP48CA (Diotec Semiconductor): This substitute maintains the P600 axial package configuration, ensuring direct mechanical compatibility with existing PCB layouts. The 5KP48CA provides enhanced peak pulse power rating (5kW versus 3kW) and increased peak pulse current (65A versus 38.8A), offering improved transient protection margin. The component is active in production with ROHS3 compliance and current inventory availability. Operating temperature range extends to -50°C minimum, which is acceptable for most general-purpose applications. This option is suitable for direct replacement in applications where the enhanced performance characteristics do not create thermal or circuit design conflicts.

30KP48CA-TP (Micro Commercial Co): This substitute offers significantly enhanced power dissipation capability (30kW peak pulse power), providing substantial protection margin for high-energy transient events. The component maintains the 48V reverse standoff voltage and achieves comparable clamping voltage (81.6V). The R-6 axial package differs from the original P600 configuration, requiring PCB layout verification for mechanical fit. The component is active in production with ROHS3 compliance and REACH Unaffected status. This option is appropriate for applications requiring maximum transient energy absorption or where circuit redesign to accommodate the R-6 package is feasible.

Both substitute parts satisfy RoHS3 compliance requirements and maintain the critical 48V reverse standoff voltage specification essential for circuit protection function.

Frequently Asked Questions (FAQ)

Q: Can the 5KP48CA directly replace the 3KP48C without PCB modifications?

A: The 5KP48CA maintains the P600 axial through-hole package configuration, enabling direct mechanical substitution on existing PCBs designed for the 3KP48C. Electrical parameters are compatible with the 48V protection specification. No PCB layout modifications are required for package accommodation.

Q: What is the primary difference between the 5KP48CA and 30KP48CA-TP substitutes?

A: The 5KP48CA provides 5kW peak pulse power with P600 package compatibility, suitable for standard general-purpose applications. The 30KP48CA-TP delivers 30kW peak pulse power with R-6 package configuration, designed for high-energy transient protection applications. Package differences require PCB evaluation for the 30KP48CA-TP implementation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, both the 5KP48CA and 30KP48CA-TP are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original 3KP48C component.

Q: Does the 48V reverse standoff voltage remain consistent across all parts?

A: Yes, all three components maintain the 48V reverse standoff voltage specification, ensuring consistent circuit protection threshold across the original and substitute parts.

Q: What is the significance of the R-6 package used in the 30KP48CA-TP?

A: The R-6 package is a larger axial through-hole configuration compared to the P600 package. While both are through-hole components, the R-6 package dimensions differ, requiring verification of PCB footprint compatibility before implementation.

Q: Can the 30KP48CA-TP be used in applications originally designed for the 3KP48C?

A: The 30KP48CA-TP is electrically compatible with the 48V protection specification. However, the R-6 package configuration differs from the original P600 package, necessitating PCB layout review to confirm mechanical fit and thermal management compatibility.

Q: What is the operating temperature range difference between substitutes?

A: The 3KP48C and 30KP48CA-TP both operate from -55°C to 175°C. The 5KP48CA operates from -50°C to 175°C, a 5°C difference at the minimum temperature. This difference is acceptable for most general-purpose applications but should be verified for extreme low-temperature environments.