3KP43A-TP Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The 3KP43A-TP is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection applications. This through-hole axial component operates across a wide temperature range of -55°C to 175°C and is ROHS3 compliant. The part is currently active in production with 1195 units in stock. Equivalent and substitute parts are identified based on matching electrical characteristics including reverse standoff voltage, breakdown voltage, clamping voltage, and power dissipation ratings, combined with compatible through-hole axial packaging.

Substiute Parts

3KP43A-TP

Micro Commercial CoIn Stock: 12493KP43A-TP Datasheet

Current PartRFQ

5KP43A

Littelfuse Inc.In Stock: 34105KP43A Datasheet

SimilarRFQ

5KP43A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 81645KP43A-E3/54 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP43A-TP are qualified based on the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

• Voltage - Reverse Standoff (Typ): 43V
• Voltage - Breakdown (Min): 47.8V
• Voltage - Clamping (Max) @ Ipp: 69.4V
• Unidirectional Zener topology with single channel
• Operating temperature range: -55°C ~ 175°C (TJ)
• General-purpose application classification

Mechanical Compatibility:

• Through-hole axial mounting configuration
• Compatible package form factors (R-6 or P600 axial packages)

Compliance Requirements:

• ROHS3 compliant status
• MSL 1 (Unlimited) moisture sensitivity level

The identified substitute parts maintain identical voltage specifications and operating temperature ranges while offering equal or superior power dissipation ratings and peak pulse current handling. All substitutes are active products with ROHS3 compliance and unlimited moisture sensitivity ratings.

Parameter Comparison

Engineering Selection Recommendations

All three parts—3KP43A-TP, 5KP43A, and 5KP43A-E3/54—are active products with ROHS3 compliance and unlimited moisture sensitivity ratings, making them suitable for equivalent substitution in general-purpose transient voltage suppression applications.

The 5KP43A (Littelfuse) and 5KP43A-E3/54 (Vishay) offer enhanced power dissipation capabilities at 5000W compared to the 3KP43A-TP at 3000W, while maintaining identical voltage specifications. Both substitute parts feature P600 axial packaging, which is mechanically compatible with through-hole axial mounting applications.

Selection between these parts should be based on availability, lead time, and specific board layout constraints related to package form factor differences (R-6 versus P600 axial packages). All parts meet the same compliance and environmental operating requirements.

Frequently Asked Questions (FAQ)

Q: Can the 5KP43A or 5KP43A-E3/54 directly replace the 3KP43A-TP?

A: Yes. Both substitute parts maintain identical voltage specifications (43V reverse standoff, 47.8V breakdown minimum, 69.4V clamping maximum) and operating temperature range (-55°C to 175°C). The primary difference is enhanced power dissipation (5000W versus 3000W) and package form factor (P600 versus R-6 axial). Through-hole axial mounting compatibility is maintained across all three parts.

Q: What are the key electrical parameters that determine substitution eligibility?

A: The critical parameters are reverse standoff voltage (43V), breakdown voltage minimum (47.8V), clamping voltage maximum (69.4V), and operating temperature range (-55°C to 175°C). All three parts match these specifications exactly, qualifying them as electrical equivalents for general-purpose TVS applications.

Q: Are there package compatibility considerations?

A: The 3KP43A-TP uses R-6 axial packaging, while both 5KP43A and 5KP43A-E3/54 use P600 axial packaging. Both are through-hole axial configurations suitable for PCB mounting. Physical dimensions may differ, so board layout verification is necessary when substituting between package types.

Q: Do all parts meet the same compliance standards?

A: Yes. The 3KP43A-TP, 5KP43A, and 5KP43A-E3/54 are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings. All parts are currently active in production status.

Q: What is the advantage of the higher power rating in the substitute parts?

A: The 5KP43A and 5KP43A-E3/54 offer 5000W peak pulse power dissipation compared to 3000W in the 3KP43A-TP. This provides additional thermal margin and surge handling capability in applications experiencing high transient energy events, while maintaining the same voltage protection characteristics.