5KP43CA-G Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The 5KP43CA-G is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Comchip Technology, designed for general-purpose overvoltage protection applications. This through-hole component operates across a temperature range of -55°C to 150°C and is ROHS3 compliant with unlimited moisture sensitivity rating. The part is currently active in production with 1119 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, design redundancy, and supply chain continuity when the primary part becomes unavailable or when alternative packaging or performance characteristics better suit specific application requirements.

Substiute Parts

5KP43CA-G

Comchip TechnologyIn Stock: 11635KP43CA-G Datasheet

Current PartRFQ

15KPA43CA

MDE Semiconductor IncIn Stock: 168615KPA43CA Datasheet

MFR RecommendedRFQ

5KP43CA

Littelfuse Inc.In Stock: 43425KP43CA Datasheet

MFR RecommendedRFQ

P6KE47CA

Diotec SemiconductorIn Stock: 25492P6KE47CA Datasheet

MFR RecommendedRFQ

P6KE56CA

Taiwan Semiconductor CorporationIn Stock: 58134P6KE56CA Datasheet

MFR RecommendedRFQ

SA48CA

Taiwan Semiconductor CorporationIn Stock: 300442SA48CA Datasheet

MFR RecommendedRFQ

SLD43-018-B

Littelfuse Inc.In Stock: 1494SLD43-018-B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP43CA-G is determined by the following critical parameters: reverse standoff voltage (43V nominal), breakdown voltage range (47.8V minimum), clamping voltage at peak pulse current (69.4V maximum), peak pulse current capability (72.05A), and peak pulse power rating (5000W). All substitute parts must maintain bidirectional Zener diode topology with single-channel configuration and through-hole mounting. Acceptable substitutes are grouped by electrical equivalence within the specified voltage and current parameters, with consideration for package variations (R-6, P600, and DO-15 axial packages) and operating temperature ranges. RoHS3 compliance and unlimited moisture sensitivity rating are required for all substitutes.

Parameter Comparison

Engineering Selection Recommendations

Primary Equivalents (Electrical and Thermal Match)

The 5KP43CA and SLD43-018-B provide the closest electrical equivalence to the 5KP43CA-G, maintaining identical reverse standoff voltage (43V), clamping voltage (69.4V), and peak pulse power rating (5000W). Both are manufactured by Littelfuse Inc. and support extended operating temperature ranges (-55°C to 175°C). The 5KP43CA is available in P600 package with higher inventory (4300 units) and Cut Tape packaging. The SLD43-018-B is qualified to AEC-Q101 automotive standards and available in P600 package with 1426 units in stock, suitable for applications requiring automotive-grade components.

Higher Power Alternative

The 15KPA43CA from MDE Semiconductor Inc. maintains the 43V reverse standoff voltage and 69.8V clamping voltage while providing significantly higher peak pulse current (216.3A) and power rating (15000W). This part is suitable for applications requiring enhanced transient protection margin and is available in bulk packaging with 1645 units in stock.

Lower Power Alternatives

The P6KE47CA, P6KE56CA, and SA48CA are lower-power TVS diodes (600W, 600W, and 500W respectively) with reduced peak pulse current ratings. These parts are suitable only for applications with lower transient energy requirements and should not be used as direct substitutes in circuits designed for the 5000W power rating of the main part. The SA48CA offers the highest inventory availability (300400 units) in DO-15 package.

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring environmental and regulatory compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can the 15KPA43CA be used as a direct substitute for the 5KP43CA-G?

A: Yes, the 15KPA43CA is electrically compatible as a substitute. It maintains the same 43V reverse standoff voltage and 69.4V clamping voltage. The higher peak pulse current (216.3A) and power rating (15000W) provide enhanced protection margin. However, the package differs (P600 versus R-6), requiring PCB layout verification. The extended operating temperature range (-55°C to 175°C) exceeds the original specification.

Q: Are the P6KE47CA, P6KE56CA, and SA48CA suitable replacements?

A: These parts are not direct substitutes for applications requiring the full 5000W peak pulse power rating. They are rated for 600W, 600W, and 500W respectively. Use these parts only in circuits with lower transient energy requirements. The reverse standoff voltages (40.2V, 47.8V, and 48V) also deviate from the 43V specification.

Q: What are the package compatibility considerations?

A: The 5KP43CA-G uses R-6 axial package. Substitute parts are available in P600 and DO-15 axial packages. All are through-hole components with axial lead configuration, but PCB footprint and lead spacing differ. Verify mechanical compatibility with your PCB design before substitution.

Q: Which substitute offers the best inventory availability?

A: The SA48CA provides the highest inventory (300400 units) in DO-15 package. However, this part is rated for only 500W peak pulse power and has a 48V reverse standoff voltage, making it unsuitable for direct replacement in high-power applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the environmental compliance of the original 5KP43CA-G.

Q: What is the difference between the 5KP43CA and 5KP43CA-G?

A: The 5KP43CA is the base part number from Littelfuse Inc. with identical electrical specifications. The "-G" suffix on the Comchip part may indicate manufacturer-specific packaging or qualification variant. Both maintain 43V reverse standoff voltage, 69.4V clamping voltage, and 5000W power rating.