P4KE440C Equivalent & Substitute Parts

Part Overview

The P4KE440C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection in through-hole applications. This part operates with a 376V reverse standoff voltage and 400W peak pulse power rating in a DO-204AL (DO-41) axial package. The P4KE440C is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P4KE440C

LittelfuseIn Stock: 1158P4KE440C Datasheet

Current PartRFQ

P4KE440CA

Taiwan Semiconductor CorporationIn Stock: 690P4KE440CA Datasheet

DirectRFQ

P4KE440CA-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 996P4KE440CA-E3/54 Datasheet

DirectRFQ

BZW04-376B-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 919BZW04-376B-E3/54 Datasheet

MFR RecommendedRFQ

P4KE440CA-AP

Micro Commercial CoIn Stock: 835P4KE440CA-AP Datasheet

MFR RecommendedRFQ

P4KE440CA-BP

Micro Commercial CoIn Stock: 870P4KE440CA-BP Datasheet

MFR RecommendedRFQ

P4KE440CA-TP

Micro Commercial CoIn Stock: 1033P4KE440CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE440C are qualified based on the following critical parameters that must remain consistent:

• Voltage - Reverse Standoff (Typ): 376V
• Voltage - Clamping (Max) @ Ipp: 600V–632.1V range
• Current - Peak Pulse (10/1000µs): 660mA–690mA range
• Power - Peak Pulse: 400W
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial
• Bidirectional Channels: 1
• Type: Zener

All substitute parts listed maintain these electrical and mechanical specifications within acceptable tolerances for direct circuit substitution.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs. The P4KE440CA from Taiwan Semiconductor Corporation and P4KE440CA-E3/54 from Vishay are direct functional equivalents with established supply availability. The BZW04-376B-E3/54 from Vishay (TransZorb® series) provides manufacturer-recommended equivalence with identical electrical performance.

For bulk packaging requirements, P4KE440CA-AP and P4KE440CA-BP from Micro Commercial Co maintain full electrical specifications. The P4KE440CA-TP variant offers tape and reel packaging with the same electrical characteristics.

Selection should prioritize product status (all substitutes are active), compliance certifications, and packaging format requirements for your specific application.

Frequently Asked Questions (FAQ)

Q: Can P4KE440CA directly replace P4KE440C in existing designs?

A: Yes. P4KE440CA maintains identical reverse standoff voltage (376V), peak pulse power (400W), operating temperature range (-55°C ~ 175°C), and through-hole DO-204AL package compatibility. Voltage clamping differs slightly (600V vs. 632.1V), remaining within acceptable substitution tolerance for general-purpose overvoltage protection circuits.

Q: What is the difference between P4KE440CA-E3/54 and BZW04-376B-E3/54?

A: Both parts share identical reverse standoff voltage (376V), power rating (400W), and operating temperature range. BZW04-376B-E3/54 is the manufacturer-recommended equivalent from Vishay's TransZorb® series. Voltage clamping specifications are comparable (602V vs. 603V). Selection depends on supply chain preference and existing design qualification.

Q: Are packaging variants (bulk vs. tape & reel) electrically equivalent?

A: Yes. P4KE440CA-AP (bulk), P4KE440CA-BP (bulk), and P4KE440CA-TP (tape & reel) are electrically identical. Packaging differences affect procurement and assembly processes only, not electrical performance or circuit compatibility.

Q: Does the P4KE440C obsolescence affect substitute part availability?

A: No. All qualified substitutes are active products with confirmed inventory levels ranging from 630 to 1121 pieces, ensuring reliable procurement for production and design support.

Q: Can I use BZW04-376B-E3/54 in applications originally designed for P4KE440C?

A: Yes. BZW04-376B-E3/54 meets all critical electrical parameters: 376V reverse standoff, 400W peak pulse power, -55°C ~ 175°C operating range, and DO-204AL through-hole package. This part is manufacturer-recommended for P4KE440C replacement.