Equivalent & Substitute Parts for 3KP48C-B TVS Diode

Part Overview

The 3KP48C-B is a through-hole transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This part operates with a 48V reverse standoff voltage and provides 3kW peak pulse power protection. The 3KP48C-B is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

3KP48C-B

Littelfuse Inc.In Stock: 10903KP48C-B Datasheet

Current PartRFQ

5KP48CA-B

Littelfuse Inc.In Stock: 42585KP48CA-B Datasheet

DirectRFQ

15KPA48CAE3/TR13

Microchip TechnologyIn Stock: 91715KPA48CAE3/TR13 Datasheet

MFR RecommendedRFQ

30KP48CA-TP

Micro Commercial CoIn Stock: 81630KP48CA-TP Datasheet

MFR RecommendedRFQ

3KP48CA-TP

Micro Commercial CoIn Stock: 8513KP48CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP48C-B is determined by the following critical parameters:

• Reverse Standoff Voltage: Must be 48V (±tolerance as specified by manufacturer)
• Bidirectional Channels: Must be 1
• Type: Must be Zener TVS diode
• Operating Temperature Range: Must support -55°C to 175°C (TJ)
• Mounting Type: Must be through-hole
• RoHS Compliance: Must maintain ROHS3 compliance

Substitute parts may vary in clamping voltage, peak pulse current, and peak pulse power ratings while maintaining the core voltage protection specification. Package variations (P600 vs. R-6 axial) are acceptable provided mechanical fit and electrical performance remain compatible with the application circuit.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain the critical 48V reverse standoff voltage specification and single-channel bidirectional Zener TVS configuration required for functional equivalence to the 3KP48C-B.

5KP48CA-B (Littelfuse Inc.) provides the closest form-factor match with P600 axial packaging and maintains identical operating temperature range. This part is actively manufactured and ROHS3 compliant, offering direct procurement continuity.

3KP48CA-TP (Micro Commercial Co) matches the original 3kW peak pulse power rating and 38.8A peak pulse current specification, with identical clamping voltage performance. The R-6 axial package is mechanically compatible with through-hole PCB layouts. This part is actively manufactured.

15KPA48CAE3/TR13 (Microchip Technology) and 30KP48CA-TP (Micro Commercial Co) provide higher power ratings (15kW and 30kW respectively) for applications requiring enhanced transient suppression capability. Both maintain the 48V standoff voltage and are actively manufactured with ROHS3 compliance.

Selection should be based on application power dissipation requirements and PCB layout constraints related to package type (P600 vs. R-6).

Frequently Asked Questions (FAQ)

Q: Can the 3KP48C-B be directly replaced with any of these substitute parts?

A: Yes, all listed substitute parts maintain the 48V reverse standoff voltage, single-channel Zener configuration, and through-hole mounting type. Functional substitution is valid provided the application circuit can accommodate the specified clamping voltage and peak pulse power characteristics of the selected replacement.

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

A: Both P600 and R-6 are axial through-hole packages for TVS diodes. The primary difference is physical dimensions. P600 and R-6 packages are mechanically compatible with standard through-hole PCB layouts, though specific footprint verification is recommended for tight board designs.

Q: Why do some substitute parts have higher peak pulse power ratings?

A: The 5KP48CA-B, 15KPA48CAE3/TR13, and 30KP48CA-TP are designed for applications requiring greater transient energy absorption. These parts maintain the same 48V standoff voltage but provide enhanced current-handling capability. Selection depends on the specific transient energy levels present in the application circuit.

Q: Are all substitute parts ROHS3 compliant?

A: The 5KP48CA-B, 15KPA48CAE3/TR13, and 30KP48CA-TP are confirmed ROHS3 compliant. The 3KP48CA-TP RoHS status is not specified in the provided data.

Q: What is the inventory status of these parts?

A: The 3KP48C-B is obsolete with 993 pieces available. All substitute parts are actively manufactured: 5KP48CA-B (4154 pcs), 15KPA48CAE3/TR13 (880 pcs), 30KP48CA-TP (726 pcs), and 3KP48CA-TP (758 pcs).