KTC4373-Y-TP Equivalent & Substitute Parts

Part Overview

The KTC4373-Y-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, rated for 120V collector-emitter breakdown voltage and 800mA maximum collector current in a surface mount SOT-89 package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement continuity. Active alternatives with comparable electrical characteristics and mechanical compatibility are available from established semiconductor manufacturers.

Substiute Parts

KTC4373-Y-TP

Micro Commercial CoIn Stock: 1065KTC4373-Y-TP Datasheet

Current PartRFQ

2SCR372P5T100Q

Rohm SemiconductorIn Stock: 103242SCR372P5T100Q Datasheet

SimilarRFQ

2SCR372P5T100R

Rohm SemiconductorIn Stock: 34552SCR372P5T100R Datasheet

SimilarRFQ

2SC2881-Y(TE12L,ZC

Toshiba Semiconductor and StorageIn Stock: 1383032SC2881-Y(TE12L,ZC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KTC4373-Y-TP is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Transistor Type: NPN configuration
• Voltage - Collector Emitter Breakdown (Max): 120 V minimum
• Current - Collector (Ic) (Max): 800 mA or greater
• Power - Max: 500 mW or greater
• DC Current Gain (hFE) (Min) @ Ic, Vce: 120 @ 100mA, 5V or greater
• Operating Temperature (TJ): 150°C or greater

Mechanical Compatibility Criteria:

• Package / Case: TO-243AA
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Compliance Criteria:

• RoHS Status: ROHS3 Compliant

Substitute parts are classified into two categories: parametric equivalents (matching all electrical specifications) and functional substitutes (meeting minimum performance requirements with acceptable trade-offs in secondary parameters such as transition frequency or saturation voltage).

Parameter Comparison

Engineering Selection Recommendations

2SC2881-Y(TE12L,ZC - Parametric Equivalent (Recommended Primary Substitute)

The 2SC2881-Y(TE12L,ZC manufactured by Toshiba Semiconductor and Storage is a parametric equivalent to the KTC4373-Y-TP. This part maintains identical electrical specifications across all critical parameters: 120V breakdown voltage, 800mA maximum collector current, 500mW power dissipation, 120MHz transition frequency, and 1V saturation voltage at specified bias conditions. The part is ROHS3 compliant, carries MSL-1 moisture sensitivity rating, and is in active production status with substantial inventory availability (138,200 units). The identical TO-243AA package and surface mount configuration ensure direct mechanical compatibility. This substitute is suitable for direct replacement in applications where the original KTC4373-Y-TP specifications are required.

2SCR372P5T100Q and 2SCR372P5T100R - Functional Substitutes

The 2SCR372P5T100Q and 2SCR372P5T100R, both manufactured by Rohm Semiconductor, are functional substitutes that meet the minimum electrical requirements of the KTC4373-Y-TP with acceptable trade-offs. These parts maintain the 120V breakdown voltage, 500mW power rating, and 120 minimum DC current gain. The maximum collector current is rated at 700mA, which is 100mA lower than the original specification. The transition frequency is enhanced to 220MHz compared to the original 120MHz. The saturation voltage is improved to 300mV at the specified bias point, compared to 1V for the original part. Both parts are ROHS3 compliant, MSL-1 rated, and in active production. These substitutes are suitable for applications where the 700mA collector current rating is sufficient and where the improved saturation voltage and higher transition frequency provide design benefits. The 2SCR372P5T100Q and 2SCR372P5T100R are electrically interchangeable with each other and differ only in packaging configuration (both available in Cut Tape and Digi-Reel formats).

Compliance and Availability Considerations

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring compatibility with modern manufacturing and storage requirements. The 2SC2881-Y(TE12L,ZC offers the highest inventory availability, supporting immediate procurement needs. The Rohm alternatives provide active production status with adequate stock levels for sustained supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can the 2SCR372P5T100Q or 2SCR372P5T100R be used as direct replacements for the KTC4373-Y-TP?

A: The Rohm parts are functional substitutes suitable for applications where the 700mA maximum collector current specification is adequate. The KTC4373-Y-TP is rated for 800mA; therefore, designs operating at collector currents above 700mA require the 2SC2881-Y(TE12L,ZC parametric equivalent. Both Rohm alternatives offer improved saturation voltage (300mV versus 1V) and higher transition frequency (220MHz versus 120MHz), which may provide performance benefits in switching applications.

Q: What is the difference between the 2SCR372P5T100Q and 2SCR372P5T100R?

A: These parts are electrically identical. The difference lies in packaging configuration: 2SCR372P5T100Q is supplied in Cut Tape and Digi-Reel format, as is 2SCR372P5T100R. Both maintain the same electrical specifications and are interchangeable for circuit design purposes.

Q: Is the 2SC2881-Y(TE12L,ZC a true equivalent to the KTC4373-Y-TP?

A: Yes. The 2SC2881-Y(TE12L,ZC is a parametric equivalent, matching all critical electrical specifications: 120V breakdown voltage, 800mA maximum collector current, 500mW power dissipation, 120MHz transition frequency, 1V saturation voltage, and 120 minimum DC current gain. The TO-243AA package and surface mount configuration are identical. This part is suitable for direct replacement without circuit modification.

Q: Are all substitute parts RoHS compliant?

A: Yes. The KTC4373-Y-TP and all listed substitute parts (2SC2881-Y(TE12L,ZC, 2SCR372P5T100Q, and 2SCR372P5T100R) are ROHS3 compliant and carry MSL-1 (unlimited) moisture sensitivity ratings.

Q: What is the primary advantage of the Rohm substitutes over the Toshiba equivalent?

A: The Rohm 2SCR372 series parts offer improved saturation voltage (300mV versus 1V) and higher transition frequency (220MHz versus 120MHz). These characteristics provide reduced power dissipation in saturation and faster switching performance. The trade-off is a 100mA reduction in maximum collector current (700mA versus 800mA).

Q: Which substitute should be selected for new designs?

A: For new designs requiring the full 800mA collector current specification and matching the original saturation voltage characteristics, the 2SC2881-Y(TE12L,ZC is the appropriate selection. For designs where 700mA collector current is sufficient and improved saturation voltage and switching speed are beneficial, the Rohm 2SCR372 series (either 2SCR372P5T100Q or 2SCR372P5T100R) is suitable.

Q: Are there any package differences between the main part and substitutes?

A: No. All parts use the TO-243AA package in surface mount configuration with identical pinout and mechanical dimensions. The supplier device packages differ (SOT-89 for the original, PW-MINI for Toshiba, and MPT3 for Rohm), but these are equivalent designations for the same TO-243AA physical package.