P4KE30C-B Equivalent & Substitute Parts

Part Overview

The P4KE30C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This bidirectional Zener diode operates in the DO-204AL (DO-41) through-hole package and provides peak pulse power handling of 400W with a reverse standoff voltage of 25.6V. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and component procurement.

Substiute Parts

P4KE30C-B

Littelfuse Inc.In Stock: 807P4KE30C-B Datasheet

Current PartRFQ

P4KE30CA

Taiwan Semiconductor CorporationIn Stock: 918P4KE30CA Datasheet

DirectRFQ

P4KE30CA-B

LittelfuseIn Stock: 966P4KE30CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE30C-B is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Reverse Standoff Voltage (Typ): 25.6V
• Voltage - Breakdown (Min): 27V or higher
• Voltage - Clamping (Max) @ Ipp: Must not exceed application requirements
• Current - Peak Pulse (10/1000µs): 9.9A or higher
• Power - Peak Pulse: 400W
• Operating Temperature Range: -55°C ~ 175°C (TJ)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial
• Bidirectional Channels: 1

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The identified substitute parts maintain these core parameters while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

P4KE30CA-B (Littelfuse): This substitute maintains identical electrical specifications to the P4KE30C-B while offering active product status. Manufactured by the same original supplier, this part provides direct functional equivalence with improved long-term availability. ROHS3 compliance and MSL 1 rating ensure compatibility with current manufacturing and storage requirements.

P4KE30CA (Taiwan Semiconductor Corporation): This alternative meets all electrical and mechanical compatibility criteria with active product status. The peak pulse current specification of 10A exceeds the original 9.9A requirement, providing additional margin. ROHS3 compliance and MSL 1 rating confirm regulatory alignment. Tape & Reel packaging offers advantages for automated assembly processes.

Both substitute parts are suitable for direct replacement in applications where the P4KE30C-B was originally specified, provided that the clamping voltage reduction from 43.47V to 41.4V is acceptable within the circuit design parameters.

Frequently Asked Questions (FAQ)

Q: Can P4KE30CA-B or P4KE30CA be used as direct replacements for P4KE30C-B?

A: Yes. Both substitute parts maintain the critical electrical parameters: 25.6V reverse standoff voltage, 400W peak pulse power, -55°C to 175°C operating temperature range, and identical through-hole DO-204AL packaging. The primary difference is the reduced clamping voltage (41.4V versus 43.47V), which must be evaluated against circuit protection requirements.

Q: What is the significance of the clamping voltage difference?

A: The P4KE30C-B clamps at 43.47V maximum, while both substitute parts clamp at 41.4V maximum. This 2.07V reduction means transient voltages are suppressed at a lower threshold. Applications requiring the higher clamping voltage of the original part should not use these substitutes.

Q: Are there packaging differences between the substitute parts?

A: Yes. P4KE30CA-B is supplied in Bulk packaging, while P4KE30CA is supplied in Tape & Reel (TR) format. Bulk packaging is suitable for manual assembly and small-volume applications, while Tape & Reel is optimized for automated pick-and-place assembly processes.

Q: Do both substitute parts meet RoHS and MSL requirements?

A: Yes. Both P4KE30CA-B and P4KE30CA are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original P4KE30C-B specifications.

Q: Which substitute should be selected for new designs?

A: Selection depends on assembly process requirements. For automated assembly, P4KE30CA (Tape & Reel) is preferred. For manual assembly or low-volume production, P4KE30CA-B (Bulk) is appropriate. Both parts offer equivalent electrical performance and active product status.

Q: Is the higher peak pulse current (10A) of P4KE30CA a concern?

A: No. The 10A specification of P4KE30CA exceeds the 9.9A requirement of the original part, providing additional current handling margin without introducing compatibility issues.