KSC3076YTU Equivalent & Substitute Parts

Part Overview

The KSC3076YTU is an NPN bipolar junction transistor manufactured by onsemi, rated for 50V collector-emitter breakdown voltage and 2A maximum collector current. This component is packaged in a Through Hole I-PAK (TO-251-3 Short Leads) configuration with a maximum power dissipation of 1W and transition frequency of 100MHz. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	50	V
Current - Collector (Ic) (Max)	2	A
Power - Max	1	W
Frequency - Transition	100	MHz
Mounting Type	Through Hole	—
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA	—
Operating Temperature (TJ)	150	°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the KSC3076YTU is determined by the following critical parameters: NPN transistor type, 50V maximum collector-emitter breakdown voltage, Through Hole mounting configuration, and TO-251-3 package compatibility. Substitute parts must maintain these core electrical and mechanical specifications to ensure direct replacement capability.

The substitute parts are grouped into two categories based on current-handling capacity:

Category 1: Direct Current Rating Match (2A) Parts with maximum collector current of 2A provide pin-for-pin compatibility with identical current specifications. These parts maintain the same power dissipation envelope and are suitable for applications with no current margin requirements.

Category 2: Elevated Current Rating (3A to 5A) Parts with collector current ratings of 3A or higher provide enhanced current-handling capability while maintaining the 50V voltage rating and Through Hole package configuration. These parts are suitable for applications requiring additional current margin or where design specifications permit higher current capacity.

Category 3: High Current Variant (10A) The 2SC6017-E provides significantly elevated current capacity at 10A while maintaining 50V voltage rating and Through Hole mounting. This part is suitable only for applications where the increased current capacity is required and thermal management is adequate.

Parameter Comparison

Parameter	KSC3076YTU	2SD1801S-E	2SD1801T-E	2SD1802S-E	2SD1802T-E	2SC6017-E
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	50V	50V	50V	50V	50V	50V
Current - Collector (Ic) (Max)	2A	2A	2A	3A	5A	10A
Power - Max	1W	800mW	—	1W	1W	950mW
Frequency - Transition	100MHz	150MHz	—	150MHz	150MHz	200MHz
Vce Saturation (Max) @ Ib, Ic	500mV @ 50mA, 1A	400mV @ 50mA, 1A	—	500mV @ 100mA, 2A	0.5V @ 100mA, 2A	360mV @ 250mA, 5A
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 500mA, 2V	140 @ 100mA, 2V	—	140 @ 100mA, 2V	200 @ 100mA, 2V	200 @ 1A, 2V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA
Operating Temperature (TJ)	150°C	150°C	150°C	150°C	150°C	150°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Obsolete	Obsolete	Obsolete	Active	Obsolete
RoHS Status	—	ROHS3 Compliant	—	ROHS3 Compliant	—	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement with Identical Current Rating: The 2SD1801S-E provides equivalent electrical performance at the 2A collector current specification with improved saturation voltage characteristics (400mV versus 500mV) and higher transition frequency (150MHz versus 100MHz). This part is classified as obsolete but maintains ROHS3 compliance and identical package configuration.

For Applications Requiring Current Margin: The 2SD1802S-E supports 3A maximum collector current while maintaining 1W power dissipation and 50V voltage rating. This part accommodates designs with higher current requirements within the same thermal envelope and is ROHS3 compliant.

For Active Product Status: The 2SD1802T-E is the only substitute part with Active product status, manufactured by Fairchild Semiconductor. This part supports 5A maximum collector current, 1W power dissipation, and 150MHz transition frequency. Selection of this part ensures ongoing manufacturer support and availability.

For High Current Applications: The 2SC6017-E supports 10A maximum collector current with 200MHz transition frequency and 950mW power dissipation. This part is suitable only for applications where the elevated current capacity is required and thermal management provisions are adequate. This part is classified as obsolete.

Frequently Asked Questions (FAQ)

Q: Can the 2SD1801S-E be used as a direct replacement for the KSC3076YTU? A: Yes. Both parts are NPN transistors with 50V maximum collector-emitter breakdown voltage, 2A maximum collector current, and identical TO-251-3 package configuration. The 2SD1801S-E exhibits improved saturation voltage and higher transition frequency, making it functionally equivalent for direct substitution.

Q: What is the primary advantage of selecting the 2SD1802T-E over other substitutes? A: The 2SD1802T-E is classified as Active product status, indicating ongoing manufacturer support and availability. All other substitute parts are classified as obsolete. This part also supports 5A collector current, providing additional design margin.

Q: Are all substitute parts compatible with the same PCB footprint? A: Yes. All substitute parts use the TO-251-3 Short Leads (I-PAK) package configuration, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the KSC3076YTU.

Q: What is the significance of the transition frequency difference between the KSC3076YTU (100MHz) and substitute parts (150MHz to 200MHz)? A: Higher transition frequency indicates faster switching capability. Substitute parts with 150MHz or 200MHz transition frequency are suitable for applications operating at or below the original 100MHz specification. Applications requiring operation at frequencies approaching the transition frequency should verify performance with the specific substitute part selected.

Q: Can the 2SC6017-E be used in applications designed for the KSC3076YTU? A: The 2SC6017-E maintains 50V voltage rating and TO-251-3 package compatibility but supports 10A collector current versus 2A for the KSC3076YTU. This part is suitable only for applications where the increased current capacity is required. Thermal management and circuit design must be verified for the higher current rating.

Q: What compliance certifications are relevant for substitute part selection? A: The 2SD1801S-E, 2SD1802S-E, and 2SC6017-E are ROHS3 compliant. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status. The 2SD1802T-E compliance information is not fully specified in available data.

Q: How does saturation voltage affect substitute part selection? A: Saturation voltage determines the voltage drop across the transistor in the saturated (fully conducting) state. Lower saturation voltage reduces power dissipation and heat generation. The 2SC6017-E exhibits the lowest saturation voltage (360mV) among substitutes, while the KSC3076YTU and 2SD1802S-E both specify 500mV. Applications sensitive to power dissipation should consider this parameter.

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