P4KE47 Equivalent & Substitute Parts

Part Overview

The P4KE47 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 40.2V reverse standoff voltage with 400W peak pulse power handling capability in a through-hole DO-204AL (DO-41) package. The P4KE47 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, and thermal characteristics while supporting the same through-hole mounting configuration.

Substiute Parts

P4KE47

Littelfuse Inc.In Stock: 1017P4KE47 Datasheet

Current PartRFQ

P4KE47A

Taiwan Semiconductor CorporationIn Stock: 785P4KE47A Datasheet

DirectRFQ

BZW04-40-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1000BZW04-40-E3/54 Datasheet

DirectRFQ

P4KE47A-AP

Micro Commercial CoIn Stock: 849P4KE47A-AP Datasheet

MFR RecommendedRFQ

P4KE47A-BP

Micro Commercial CoIn Stock: 1203P4KE47A-BP Datasheet

MFR RecommendedRFQ

P4KE47A-TP

Micro Commercial CoIn Stock: 888P4KE47A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE47 is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 40.2V
• Voltage - Clamping (Max) @ Ipp: Must not exceed 68.04V to ensure circuit protection integrity
• Current - Peak Pulse (10/1000µs): Minimum 6.3A
• Power - Peak Pulse: 400W
• Operating Temperature Range: -55°C to 175°C (TJ)
• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial configuration
• Type: Zener diode, unidirectional (1 channel)

All substitute parts listed maintain these core electrical specifications and physical form factor requirements, ensuring direct functional replacement without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are classified as active products, ensuring long-term availability and supply chain continuity compared to the obsolete P4KE47. Selection among substitutes should be based on the following criteria:

P4KE47A (Taiwan Semiconductor Corporation): Active status with ROHS3 compliance and REACH unaffected designation. Tape & Reel packaging supports automated assembly processes. Clamping voltage of 64.8V provides improved transient suppression margin.

BZW04-40-E3/54 (Vishay General Semiconductor - Diodes Division): Active status with ROHS3 compliance and REACH unaffected designation. TransZorb® series designation indicates established reliability in industrial applications. Tape & Reel packaging supports high-volume production. Peak pulse current of 6.2A remains within acceptable tolerance for 40.2V standoff applications.

P4KE47A-AP, P4KE47A-BP, P4KE47A-TP (Micro Commercial Co): All three variants are active products with identical electrical specifications. Bulk packaging is suitable for manual assembly or lower-volume applications. REACH unaffected status confirmed. Selection among these three variants depends on packaging and inventory requirements rather than electrical performance.

Frequently Asked Questions (FAQ)

Q: Can P4KE47A substitute directly for P4KE47 without circuit modification?

A: Yes. Both parts maintain identical reverse standoff voltage (40.2V), operating temperature range (-55 to 175°C), and through-hole DO-204AL package configuration. The P4KE47A features a lower clamping voltage (64.8V vs. 68.04V), which provides enhanced transient suppression performance. No circuit redesign is required.

Q: What is the difference between P4KE47A variants from Micro Commercial Co (AP, BP, TP)?

A: The P4KE47A-AP, P4KE47A-BP, and P4KE47A-TP variants are electrically identical. Differences are limited to packaging format (all bulk) and inventory availability. Selection should be based on procurement and assembly requirements.

Q: Why does BZW04-40-E3/54 have a lower peak pulse current (6.2A) compared to other substitutes?

A: The BZW04-40-E3/54 maintains 400W peak pulse power handling at the same 40.2V standoff voltage. The 6.2A specification remains within acceptable operating parameters for this voltage class and is suitable for general-purpose transient suppression applications.

Q: Are all substitute parts RoHS3 compliant?

A: P4KE47A and BZW04-40-E3/54 are explicitly ROHS3 compliant. Micro Commercial Co variants (P4KE47A-AP, P4KE47A-BP, P4KE47A-TP) do not specify RoHS status in the provided data. Verify RoHS compliance requirements with the supplier if mandated by your application or regulatory framework.

Q: What is the significance of "REACH Unaffected" status?

A: REACH Unaffected designation indicates the component does not contain substances of very high concern (SVHC) listed under EU REACH regulations. This status applies to P4KE47A and BZW04-40-E3/54, supporting compliance with European regulatory requirements.

Q: Can I use these substitutes in high-frequency switching applications?

A: These TVS diodes are rated for general-purpose transient suppression with 10/1000µs pulse characteristics. Application suitability depends on your specific circuit requirements. Consult detailed datasheets for frequency-dependent performance parameters not provided in this reference.