P4KE30CA-B Equivalent & Substitute Parts

Part Overview

The P4KE30CA-B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This through-hole component operates with a reverse standoff voltage of 25.6V and provides clamping at 41.4V with a peak pulse current rating of 9.9A. The part is currently active in production and RoHS3 compliant.

Equivalent and substitute parts are identified when design requirements permit variations in package type, manufacturer, or performance characteristics while maintaining functional compatibility within the specified electrical parameters.

Substiute Parts

P4KE30CA-B

LittelfuseIn Stock: 966P4KE30CA-B Datasheet

Current PartRFQ

1.5KE30CA

Taiwan Semiconductor CorporationIn Stock: 302301.5KE30CA Datasheet

MFR RecommendedRFQ

1.5KE33CA

Diotec SemiconductorIn Stock: 1341331.5KE33CA Datasheet

MFR RecommendedRFQ

P4KE30CA

Taiwan Semiconductor CorporationIn Stock: 918P4KE30CA Datasheet

MFR RecommendedRFQ

P6KE33CA

Diotec SemiconductorIn Stock: 9289P6KE33CA Datasheet

MFR RecommendedRFQ

SA24CA

Fairchild SemiconductorIn Stock: 4653SA24CA Datasheet

MFR RecommendedRFQ

SA30CA

Taiwan Semiconductor CorporationIn Stock: 1763SA30CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE30CA-B are grouped based on the following electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 25.6V ± tolerance
• Voltage - Clamping (Max) @ Ipp: 41.4V (exact match required)
• Type: Zener, Bidirectional
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C minimum to 175°C maximum
• RoHS3 Compliance: Required

Secondary Compatibility Factors:

• Current - Peak Pulse: 9.9A or higher acceptable
• Power - Peak Pulse: 400W or higher acceptable
• Package / Case: DO-204AL (DO-41), DO-201AA (DO-27), or DO-204AC (DO-15) acceptable with circuit board layout verification

Parts meeting these criteria are classified as direct substitutes. Parts with voltage parameters outside the specified range or lower current/power ratings are not suitable substitutes.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute): The P4KE30CA manufactured by Taiwan Semiconductor Corporation matches the P4KE30CA-B across all critical electrical parameters: 25.6V reverse standoff, 28.5V breakdown minimum, and 41.4V clamping voltage. Both devices are active products with RoHS3 compliance and identical package specifications (DO-204AL/DO-41). This part is the preferred substitute when sourcing constraints affect Littelfuse availability.

Higher Power Capability Substitute: The 1.5KE30CA (Taiwan Semiconductor Corporation) provides identical voltage characteristics (25.6V standoff, 41.4V clamping) with significantly higher current (38A) and power ratings (1500W). This part is suitable for applications requiring enhanced transient energy absorption. Package change from DO-204AL to DO-201AA requires circuit board layout verification but maintains through-hole mounting compatibility.

Voltage-Shifted Substitutes (Limited Compatibility): The 1.5KE33CA and P6KE33CA feature elevated voltage parameters (28.2V standoff, 45.7V clamping) and are active products with RoHS3 compliance. These parts are suitable only when circuit design permits operation at higher clamping voltages. The 1.5KE33CA offers 1500W power capability; the P6KE33CA provides 600W in a smaller DO-15 package.

Obsolete Part (Not Recommended): The SA24CA (Fairchild Semiconductor) is marked obsolete and features lower voltage parameters (24V standoff, 38.9V clamping). This part should not be selected for new designs.

Voltage-Incompatible Part (Not Suitable): The SA30CA exhibits significantly higher clamping voltage (64.3V) and is not compatible with circuits designed for the P4KE30CA-B's 41.4V clamping specification.

Frequently Asked Questions (FAQ)

Q: Can I use the 1.5KE30CA as a direct replacement for the P4KE30CA-B? A: Yes, the 1.5KE30CA is electrically compatible with identical voltage parameters. The primary difference is the package type (DO-201AA versus DO-204AL) and significantly higher current/power ratings. Verify that your circuit board layout accommodates the DO-201AA footprint before substitution.

Q: What is the difference between the P4KE30CA and P4KE30CA-B? A: Both parts share identical electrical specifications and package type. The designation difference reflects manufacturer lot or packaging variation. The P4KE30CA (Taiwan Semiconductor Corporation) is functionally equivalent to the P4KE30CA-B (Littelfuse).

Q: Are the 1.5KE33CA and P6KE33CA suitable substitutes? A: These parts are not direct substitutes due to higher voltage parameters (28.2V standoff, 45.7V clamping versus 25.6V and 41.4V). Use only if your circuit design permits operation at elevated clamping voltages. Verify compatibility with your protection requirements before selection.

Q: Why is the SA24CA not recommended? A: The SA24CA is obsolete and features lower voltage parameters (24V standoff, 38.9V clamping) that do not meet the P4KE30CA-B specification. New designs should not incorporate obsolete components.

Q: What does "through-hole mounting" mean for these TVS diodes? A: Through-hole mounting indicates axial lead components designed for insertion into drilled holes on printed circuit boards. All listed substitutes maintain through-hole mounting compatibility, though specific package types (DO-41, DO-27, DO-15) require different footprint patterns.

Q: Are all substitute parts RoHS3 compliant? A: All active substitute parts listed are RoHS3 compliant. The obsolete SA24CA is also RoHS3 compliant but should not be used in new designs due to its discontinued status.