P4KE47C-B Equivalent & Substitute Parts

Part Overview

The P4KE47C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This bidirectional zener diode operates in the 40.2V reverse standoff voltage range with a maximum clamping voltage of 68.04V and peak pulse current rating of 6.3A. The component is packaged in a through-hole DO-204AL (DO-41) axial configuration and is rated for operating temperatures from -55°C to 175°C.

The P4KE47C-B is classified as obsolete. Equivalent and substitute parts are available from active product lines that maintain the same electrical and mechanical specifications, enabling continued system design and maintenance without redesign requirements.

Substiute Parts

P4KE47C-B

Littelfuse Inc.In Stock: 1041P4KE47C-B Datasheet

Current PartRFQ

P4KE47CA

Taiwan Semiconductor CorporationIn Stock: 300133P4KE47CA Datasheet

DirectRFQ

P4KE47CA-B

Littelfuse Inc.In Stock: 963P4KE47CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE47C-B is determined by the following critical electrical and mechanical parameters:

• Reverse Standoff Voltage (Typ): 40.2V — must remain constant
• Bidirectional Channels: 1 — single channel configuration required
• Mounting Type: Through Hole — axial lead configuration
• Package / Case: DO-204AL (DO-41) — physical form factor must match
• Operating Temperature Range: -55°C ~ 175°C (TJ) — thermal operating envelope
• Type: Zener — diode classification
• RoHS Status: ROHS3 Compliant — regulatory compliance requirement

Substitute parts must maintain these parameters to ensure functional and mechanical compatibility. Variations in clamping voltage, breakdown voltage, and peak pulse current within the P4KE series are acceptable provided the reverse standoff voltage and package configuration remain unchanged.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE47CA and P4KE47CA-B are qualified substitutes for the obsolete P4KE47C-B based on matching critical electrical and mechanical parameters.

P4KE47CA (Taiwan Semiconductor Corporation) is an active product with ROHS3 compliance and REACH unaffected status. This part is available in high volume (300,100 pcs in stock) and packaged in Tape & Reel format, suitable for automated assembly processes.

P4KE47CA-B (Littelfuse Inc.) is an active product with ROHS3 compliance and REACH unaffected status. This part maintains the same manufacturer as the original component and is available in bulk packaging (946 pcs in stock), suitable for manual assembly or lower-volume applications.

Both substitutes maintain the same reverse standoff voltage (40.2V), operating temperature range (-55°C ~ 175°C), and DO-204AL package configuration. The clamping voltage is lower (64.8V vs. 68.04V) and peak pulse current is equivalent or slightly higher, representing improved performance characteristics within the same protection class.

Frequently Asked Questions (FAQ)

Q: Can P4KE47CA or P4KE47CA-B be used as direct replacements for P4KE47C-B?

A: Yes. Both parts maintain the critical electrical parameters (40.2V reverse standoff voltage, 400W peak pulse power) and identical mechanical configuration (DO-204AL through-hole axial package). The lower clamping voltage (64.8V vs. 68.04V) represents tighter voltage regulation, which is compatible with the original application.

Q: What is the difference between P4KE47CA and P4KE47CA-B?

A: Both parts are electrically equivalent with identical electrical specifications. The primary differences are manufacturer (Taiwan Semiconductor Corporation vs. Littelfuse Inc.), packaging format (Tape & Reel vs. Bulk), and inventory availability. Selection depends on assembly process requirements and supply chain preferences.

Q: Are there any compliance or regulatory differences between the main part and substitutes?

A: No. All three parts are ROHS3 compliant and rated for the same operating temperature range (-55°C ~ 175°C). Both substitutes carry REACH unaffected status, confirming regulatory alignment.

Q: Does the lower clamping voltage of the substitutes affect circuit protection?

A: No. The lower clamping voltage (64.8V vs. 68.04V) indicates improved voltage regulation performance. Both substitutes maintain the same reverse standoff voltage (40.2V) and peak pulse power rating (400W), ensuring equivalent protection functionality.

Q: What packaging considerations apply to these substitutes?

A: P4KE47CA is supplied in Tape & Reel format, optimized for automated pick-and-place assembly. P4KE47CA-B is supplied in bulk packaging, suitable for manual assembly or lower-volume production. Both use identical DO-204AL (DO-41) axial lead configuration for through-hole mounting.