P4KE24C-B Equivalent & Substitute Parts

Part Overview

The P4KE24C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 20.5V reverse standoff voltage with a 34.86V maximum clamping voltage and 12.3A peak pulse current capability in a through-hole DO-204AL (DO-41) axial package. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

P4KE24C-B

Littelfuse Inc.In Stock: 1095P4KE24C-B Datasheet

Current PartRFQ

P4KE24CA

Taiwan Semiconductor CorporationIn Stock: 30294P4KE24CA Datasheet

DirectRFQ

P4KE24CA-B

Littelfuse Inc.In Stock: 1030P4KE24CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE24C-B are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine substitution eligibility:

• Reverse standoff voltage: 20.5V (identical)
• Package type: DO-204AL / DO-41 axial through-hole (identical)
• Bidirectional channels: 1 (identical)
• Operating temperature range: -55°C ~ 175°C (identical)
• Peak pulse power rating: 400W (identical)
• RoHS3 compliance (required)

Acceptable variations within substitute parts include:

• Voltage breakdown minimum: 21.6V to 22.8V
• Clamping voltage maximum: 33.2V to 34.86V
• Peak pulse current: 12.3A to 12.6A

These variations remain within the functional tolerance for general-purpose transient voltage suppression applications while maintaining the same protection envelope and package footprint.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE24CA and P4KE24CA-B are qualified substitutes for the obsolete P4KE24C-B based on electrical parameter compatibility and regulatory compliance.

P4KE24CA-B (Littelfuse Inc.) is the preferred substitute when maintaining single-source supplier continuity is a design requirement. This part maintains Littelfuse manufacturing and carries active product status with ROHS3 and REACH compliance certifications. The bulk packaging option aligns with production environments requiring higher volume procurement.

P4KE24CA (Taiwan Semiconductor Corporation) provides an alternative source with significantly higher inventory availability (30200 units) and active product status. This part meets identical electrical specifications and regulatory requirements, offering supply chain redundancy and extended lead-time protection.

Both substitutes demonstrate clamping voltages within acceptable operating margins (33.2V versus 34.86V) and maintain the same thermal and mechanical characteristics as the original component.

Frequently Asked Questions (FAQ)

Q: Can P4KE24CA and P4KE24CA-B be used interchangeably with P4KE24C-B?

A: Yes. Both parts share identical reverse standoff voltage (20.5V), package type (DO-204AL), operating temperature range (-55°C to 175°C), and peak pulse power rating (400W). The clamping voltage variation (33.2V versus 34.86V) and peak pulse current difference (12.3A to 12.6A) remain within acceptable functional tolerance for general-purpose transient suppression.

Q: Why does the clamping voltage differ between the main part and substitutes?

A: The P4KE24C-B specifies a maximum clamping voltage of 34.86V, while both substitutes specify 33.2V. This represents a tighter clamping characteristic in the substitute parts, which provides enhanced protection margins in most applications. The difference is within the tolerance band for the P4KE24 series.

Q: Are there packaging differences between these parts?

A: All three parts use identical DO-204AL (DO-41) axial through-hole packaging. P4KE24CA-B is supplied in bulk packaging, while P4KE24CA and P4KE24C-B do not specify packaging type restrictions. No PCB layout or mounting modifications are required for substitution.

Q: What is the significance of the product status difference?

A: P4KE24C-B is classified as obsolete, indicating Littelfuse has discontinued active production and support. Both substitute parts carry active product status, ensuring continued availability, technical support, and compliance with current regulatory standards. Active status is recommended for new designs and long-term production support.

Q: Do all parts meet the same compliance requirements?

A: Yes. All three parts are ROHS3 compliant. P4KE24CA additionally carries REACH Unaffected certification. Both substitutes meet or exceed the regulatory requirements of the original component.