15KP30C Equivalent & Substitute Parts

Part Overview

The 15KP30C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This component features a 30V reverse standoff voltage with a maximum clamping voltage of 53.24V at peak pulse current, rated for 15kW peak pulse power dissipation. The part is classified as obsolete, necessitating identification of active alternative components that maintain functional equivalence for new designs and ongoing production requirements.

Substiute Parts

15KP30C

Littelfuse Inc.In Stock: 121915KP30C Datasheet

Current PartRFQ

5KP30CA-TP

Micro Commercial CoIn Stock: 340395KP30CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 15KP30C is determined by the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff: 30V (primary selection criterion)
• Voltage - Breakdown (Min): Must support minimum 31.47V threshold
• Bidirectional Channels: 1 (single channel requirement)
• Type: Zener diode topology
• Mounting Type: Through Hole axial configuration
• Operating Temperature Range: -55°C ~ 175°C compatibility
• RoHS3 Compliance: Required for regulatory alignment

The 5KP30CA-TP from Micro Commercial Co meets these core substitution criteria. While the clamping voltage (48.4V) and peak pulse power (5kW) differ from the original specification, the reverse standoff voltage (30V), breakdown voltage (33.3V), bidirectional single-channel configuration, through-hole axial mounting, temperature range, and RoHS3 compliance establish functional equivalence for general-purpose TVS applications.

Parameter Comparison

Engineering Selection Recommendations

The 5KP30CA-TP is the manufacturer-recommended substitute for the obsolete 15KP30C. Both components maintain ROHS3 compliance and identical operating temperature specifications (-55°C ~ 175°C). The substitute part is currently in active production status with substantial inventory availability (33,943 pcs), ensuring supply chain continuity.

Selection of the 5KP30CA-TP is appropriate for applications where the reduced peak pulse power rating (5kW versus 15kW) and lower clamping voltage (48.4V versus 53.24V) are compatible with circuit protection requirements. The matching reverse standoff voltage (30V) and breakdown voltage characteristics ensure proper voltage regulation within the specified operating window.

Frequently Asked Questions (FAQ)

Q: Can the 5KP30CA-TP directly replace the 15KP30C in existing designs?

A: The 5KP30CA-TP maintains the critical voltage parameters (30V reverse standoff, 33.3V minimum breakdown) required for TVS functionality. However, the reduced peak pulse power rating (5kW versus 15kW) and lower clamping voltage (48.4V versus 53.24V) must be evaluated against your specific circuit protection requirements. Verify that your application's transient energy levels do not exceed the 5kW rating.

Q: Are the package dimensions compatible between P600 and R-6 axial packages?

A: Both the 15KP30C (P600) and 5KP30CA-TP (R-6) use axial through-hole mounting. While both are axial configurations, the physical dimensions differ between P600 and R-6 packages. PCB layout and mechanical clearance must be verified before substitution.

Q: What is the significance of the different breakdown voltages (31.47V vs. 33.3V)?

A: Both parts meet the 30V reverse standoff specification. The breakdown voltage represents the point at which the diode begins conducting. The 5KP30CA-TP's 33.3V minimum breakdown is within acceptable tolerance for general-purpose TVS applications and does not compromise voltage regulation performance.

Q: Is the 5KP30CA-TP suitable for high-energy transient suppression applications?

A: The 5KP30CA-TP is rated for 5kW peak pulse power, compared to the original 15KP30C's 15kW rating. Applications requiring suppression of high-energy transients exceeding 5kW should not use this substitute without circuit redesign or additional protective measures.

Q: Are both parts RoHS compliant?

A: Yes, both the 15KP30C and 5KP30CA-TP are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and use.