5KP33C Equivalent & Substitute Parts

Part Overview

The 5KP33C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 33V reverse standoff voltage, 5000W peak pulse power rating, and through-hole P600 axial packaging. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

5KP33C

Littelfuse Inc.In Stock: 7435KP33C Datasheet

Current PartRFQ

5KP33CA

HY Electronic (Cayman) LimitedIn Stock: 118415KP33CA Datasheet

DirectRFQ

SLD33-018-B

Littelfuse Inc.In Stock: 4663SLD33-018-B Datasheet

MFR RecommendedRFQ

5KP33CA-TP

Micro Commercial CoIn Stock: 168145KP33CA-TP Datasheet

MFR RecommendedRFQ

5KP33CE3/TR13

Microchip TechnologyIn Stock: 10835KP33CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP33C is determined by the following critical parameters:

• Voltage - Reverse Standoff: 33V (all substitutes maintain this specification)
• Power - Peak Pulse: 5000W (all substitutes maintain this specification)
• Bidirectional operation: 1 channel (all substitutes maintain this specification)
• Mounting Type: Through Hole axial configuration
• RoHS3 Compliance: Required for all substitutes

Substitutes are grouped by voltage clamping characteristics and package compatibility. The 5KP33C operates with a maximum clamping voltage of 55.97V. Substitute parts maintain the same standoff and power ratings while offering variations in clamping voltage (53.3V to 59V) and peak pulse current ratings (84.7A to 95.7A), all within acceptable operating parameters for 33V protection circuits.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, meeting the environmental and regulatory requirements of the original 5KP33C.

For applications requiring identical package geometry (P600 axial), select either SLD33-018-B or 5KP33CE3/TR13. SLD33-018-B is manufactured by Littelfuse Inc., the original manufacturer, and maintains the full operating temperature range (-55°C to 175°C). The 5KP33CE3/TR13 from Microchip Technology also supports the full temperature range and offers slightly higher clamping voltage (59V).

For applications where R-6 axial package is acceptable, 5KP33CA and 5KP33CA-TP provide active product status with lower clamping voltages (53.3V). The 5KP33CA from HY Electronic operates to 150°C maximum junction temperature, while 5KP33CA-TP from Micro Commercial Co extends to 175°C.

All substitutes maintain the 33V reverse standoff voltage and 5000W peak pulse power rating, ensuring functional equivalence in 33V protection circuits.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different clamping voltage?

A: Yes. The 5KP33C operates at 55.97V maximum clamping voltage. Substitutes with lower clamping voltages (53.3V from 5KP33CA, SLD33-018-B, and 5KP33CA-TP) provide tighter voltage regulation. The 5KP33CE3/TR13 at 59V clamping voltage remains within acceptable protection parameters for 33V standoff circuits. Selection depends on your circuit's specific voltage tolerance requirements.

Q: Are package differences between P600 and R-6 significant?

A: Both P600 and R-6 are axial through-hole packages for TVS diodes. Physical dimensions differ slightly, but electrical performance is equivalent. Verify PCB footprint compatibility before substitution. P600 and R-6 packages are not interchangeable on existing PCBs without layout modification.

Q: Does operating temperature range affect substitution?

A: The 5KP33C operates from -55°C to 175°C. Most substitutes maintain this range. The 5KP33CA is limited to -55°C to 150°C maximum junction temperature. For applications requiring full -55°C to 175°C operation, select SLD33-018-B, 5KP33CA-TP, or 5KP33CE3/TR13.

Q: What is the difference between active and obsolete product status?

A: The 5KP33C is obsolete and no longer manufactured. All listed substitutes are active products with ongoing manufacturing support and availability. Active status ensures continued procurement and technical support from manufacturers.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL Level 1 rating, matching the environmental compliance of the original 5KP33C.