P4KE33C-B Equivalent & Substitute Parts

Part Overview

The P4KE33C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection applications. This component features a 28.2V reverse standoff voltage with a 47.99V maximum clamping voltage and 9A peak pulse current capability in a through-hole DO-204AL (DO-41) package format. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

P4KE33C-B

Littelfuse Inc.In Stock: 1135P4KE33C-B Datasheet

Current PartRFQ

P4KE33CA

Taiwan Semiconductor CorporationIn Stock: 1037P4KE33CA Datasheet

DirectRFQ

P4KE33CA-B

Littelfuse Inc.In Stock: 1195P4KE33CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE33C-B is determined by the following critical parameters:

• Reverse Standoff Voltage: 28.2V (must match)
• Peak Pulse Current: 9A (must match)
• Package Type: DO-204AL (DO-41) through-hole (must match)
• Bidirectional Channels: 1 (must match)
• Operating Temperature Range: -55°C to 175°C (must match)
• Clamping Voltage: 45.7V to 47.99V (acceptable range for substitution)
• Breakdown Voltage (Min): 29.75V to 31.4V (acceptable range for substitution)

The identified substitute parts meet all critical electrical and mechanical parameters within the allowable tolerances for this TVS diode category.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete P4KE33C-B, the following active alternatives are available:

P4KE33CA-B (Littelfuse Inc.) is the primary recommendation. This part maintains the same manufacturer lineage as the original component, ensuring design continuity and supply chain familiarity. It is currently in active production status with ROHS3 compliance and REACH unaffected certification. The clamping voltage specification of 45.7V is lower than the original 47.99V, representing improved performance characteristics within the acceptable substitution range.

P4KE33CA (Taiwan Semiconductor Corporation) provides an alternative from a secondary manufacturer. This part is also in active production with identical electrical specifications to the P4KE33CA-B variant, differing only in packaging format (Tape & Reel versus Bulk). ROHS3 compliance and REACH unaffected status are confirmed.

Both substitute parts satisfy all critical electrical and mechanical requirements for direct substitution in existing designs.

Frequently Asked Questions (FAQ)

Q: Can P4KE33CA be used as a direct replacement for P4KE33C-B?

A: Yes. Both parts share identical reverse standoff voltage (28.2V), peak pulse current (9A), operating temperature range (-55 to 175°C), and package type (DO-204AL through-hole). The clamping voltage difference (45.7V versus 47.99V) falls within acceptable substitution parameters for this TVS diode category.

Q: What is the difference between P4KE33CA and P4KE33CA-B?

A: The electrical specifications are identical. The primary difference is packaging format: P4KE33CA is supplied in Tape & Reel format, while P4KE33CA-B is supplied in Bulk format. Both are manufactured to the same electrical standards and are suitable for the same applications.

Q: Why is the clamping voltage different between the main part and substitutes?

A: The P4KE33CA variants specify a maximum clamping voltage of 45.7V compared to the original 47.99V. This represents a tighter specification and improved performance within the P4KE33 series design envelope. Both values are within acceptable operating parameters for transient voltage suppression applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification, matching the environmental and regulatory status of the original P4KE33C-B component.

Q: Can I mix packaging formats in production?

A: Packaging format selection (Tape & Reel versus Bulk) depends on assembly process requirements and inventory management practices. Electrically and mechanically, both formats are equivalent and interchangeable for the same application.