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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi KSC3076YTU

Name: KSC3076YTU
Brand: onsemi
SKU: KSC3076YTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSC3076YTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: KSC3076YTU.pdf

Description:: TRANS NPN 50V 2A IPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSC3076YTU from ON Semiconductor (formerly Fairchild) is an NPN epitaxial silicon power transistor in I-Pak package, rated for 50 V V_CEO, 2 A I_C, and 10 W P_C at T_C = 25°C, with h_FE of 120–240 at I_C = 1.5 A, used in low-voltage audio and switching power amplifier stages.

For engineers reviewing the KSC3076YTU datasheet, pinout, applications, or equivalent options, key selection criteria include V_CE(sat) ≤ 0.5 V at I_C = 1 A, f_T = 100 MHz, Cob = 30 pF, t_ON/t_F ≤ 0.1 µs, and I-Pak thermal performance for medium-power linear/switching operation.

Technical Context

The KSC3076YTU operates as a medium-power NPN bipolar junction transistor optimized for Class AB audio output and DC-DC converter switch applications. Its design emphasizes low saturation voltage (V_CE(sat) = 0.5 V), high current gain bandwidth (f_T = 100 MHz), and fast switching (t_ON/t_F = 0.1 µs) under I_C = 1 A conditions.

It features complementary pairing with KSA1241 (PNP), supports continuous collector dissipation up to 10 W at case temperature, and maintains h_FE stability across I_C = 0.5–1.5 A range with V_CE = 2 V bias - enabling predictable bias network design in push-pull amplifier topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum safe collector-emitter voltage before breakdown under open-base condition
I_C	2 A - Continuous DC collector current rating defining maximum linear/switching load drive capability
P_C (T_C=25°C)	10 W - Thermal power limit achievable with heatsink; enables medium-power amplifier stage operation
h_FE	120–240 - Confirmed DC current gain range at I_C = 1.5 A, supporting stable bias design in Class AB amplifiers
V_CE(sat)	0.5 V @ I_C=1 A, I_B=0.05 A - Low saturation voltage reduces conduction loss in switching applications
f_T	100 MHz - Unity-gain bandwidth enabling RF-capable amplification up to ~30 MHz fundamental frequency
C_ob	30 pF @ V_CB=10 V - Output capacitance affecting high-frequency gain roll-off and switching speed

Pinout & Package

I-Pak (TO-251AA) thermally enhanced surface-mount package with exposed drain pad (pin 2) for direct PCB thermal coupling; 3-terminal configuration: Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input node; requires 50 mA typical drive for full saturation at I_C = 1 A
2	Collector	Main power output terminal; electrically and thermally connected to exposed metal tab for heatsinking
3	Emitter	Common reference node; tied to ground or negative rail in common-emitter configurations

Key Features

Feature	Design Value
Low V_CE(sat)	0.5 V ensures <1 W conduction loss at 1 A, critical for efficiency in Class AB audio output stages
High f_T	100 MHz supports wideband amplification and fast-switching operation up to 30 MHz fundamental
I-Pak thermal design	Exposed collector tab enables >50% higher power dissipation vs. TO-92, suitable for board-level heatsinking
Complementary pairing	Explicitly matched to KSA1241 PNP for push-pull amplifier designs without gain mismatch compensation
Fast switching	t_ON/t_F = 0.1 µs enables clean square-wave response in PWM-driven power stages

Applications

Audio Power Amplifier	DC-DC Converter Switch
Use Scenario: Medium-power stereo audio output stage delivering 5–10 W into 4–8 Ω loads. IC Role / Device Role / Timing Role: NPN output transistor in Class AB push-pull pair driving speaker load. Use Value: V_CE(sat) ≤ 0.5 V minimizes quiescent heating; h_FE ≥ 120 ensures stable bias current control.	Use Scenario: High-efficiency buck converter primary-side switch operating at 100–500 kHz. IC Role / Device Role / Timing Role: Medium-current switching transistor controlling inductor current flow. Use Value: t_ON/t_F ≤ 0.1 µs reduces switching loss; f_T = 100 MHz supports clean gate drive edge integrity.
Linear Voltage Regulator Pass Element	Motor Driver Half-Bridge
Use Scenario: Adjustable 0–30 V, 1.5 A linear regulator using series pass configuration. IC Role / Device Role / Timing Role: Series pass transistor dissipating variable power based on load and dropout. Use Value: P_C = 10 W at T_C = 25°C allows regulated output under worst-case dropout and full load.	Use Scenario: 24 V, 1.5 A brushed DC motor driver with PWM speed control. IC Role / Device Role / Timing Role: High-side NPN switch in half-bridge topology driving motor winding. Use Value: V_CEO = 50 V provides 2× margin over 24 V rail; Cob = 30 pF limits shoot-through risk during commutation.

Audio Power Amplifier

DC-DC Converter Switch

Use Scenario: Medium-power stereo audio output stage delivering 5–10 W into 4–8 Ω loads.

IC Role / Device Role / Timing Role: NPN output transistor in Class AB push-pull pair driving speaker load.

Use Value: V_CE(sat) ≤ 0.5 V minimizes quiescent heating; h_FE ≥ 120 ensures stable bias current control.

Use Scenario: High-efficiency buck converter primary-side switch operating at 100–500 kHz.

IC Role / Device Role / Timing Role: Medium-current switching transistor controlling inductor current flow.

Use Value: t_ON/t_F ≤ 0.1 µs reduces switching loss; f_T = 100 MHz supports clean gate drive edge integrity.

Linear Voltage Regulator Pass Element

Motor Driver Half-Bridge

Use Scenario: Adjustable 0–30 V, 1.5 A linear regulator using series pass configuration.

IC Role / Device Role / Timing Role: Series pass transistor dissipating variable power based on load and dropout.

Use Value: P_C = 10 W at T_C = 25°C allows regulated output under worst-case dropout and full load.

Use Scenario: 24 V, 1.5 A brushed DC motor driver with PWM speed control.

IC Role / Device Role / Timing Role: High-side NPN switch in half-bridge topology driving motor winding.

Use Value: V_CEO = 50 V provides 2× margin over 24 V rail; Cob = 30 pF limits shoot-through risk during commutation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD3053G	V_CEO = 60 V, h_FE = 50–250, P_C = 1.5 W (T_A) / 15 W (T_C), same I-Pak package	Higher voltage rating but lower thermal derating above 25°C ambient; less suitable for sustained 2 A operation without forced cooling	Select when higher V_CEO margin is required and case temperature remains below 60°C
2SC5200	V_CEO = 230 V, I_C = 15 A, P_C = 150 W, TO-3P package; h_FE = 55–160 at I_C = 8 A	Over-specified voltage/current; requires larger heatsink and PCB area; not drop-in due to different footprint and pinout	Choose only for high-power audio amplifiers (>50 W) where KSC3076YTU lacks headroom

Compared with MJD3053G and 2SC5200, the KSC3076YTU delivers optimal balance of 50 V/2 A rating, 10 W case-rated power, and 0.5 V V_CE(sat) in compact I-Pak - making it preferred for space-constrained 5–15 W linear/switching applications where thermal management is moderate.

Availability

KSC3076YTU is available at Aetrix Electronics and suitable for audio power amplifiers, DC-DC converters, linear voltage regulators, and motor drivers requiring stable component supply with consistent parametric performance across production lots.

Supply support for KSC3076YTU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

ON Semiconductor is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The KSC3076YTU belongs to Fairchild's legacy power bipolar transistor family, designed specifically for cost-sensitive, medium-power analog and switching applications demanding reliable gain, low saturation, and robust thermal performance in surface-mount packages.

FAQ

What is the maximum continuous collector current rating for KSC3076YTU?

The KSC3076YTU has a maximum continuous collector current (I_C) rating of 2 A at T_C = 25°C. This rating assumes proper heatsinking; derating is required above 25°C case temperature per the thermal resistance curve in the official datasheet. The KSC3076YTU must not exceed this limit in sustained DC or high-duty-cycle pulsed operation to avoid thermal runaway.

Does KSC3076YTU have a complementary PNP transistor?

Yes, the KSC3076YTU is explicitly designated as complementary to the KSA1241 PNP transistor. Both share matched h_FE ranges, V_CEO/V_EBO ratings, and I-Pak packaging - enabling balanced push-pull amplifier designs without external gain trimming. The KSC3076YTU and KSA1241 are referenced together in Fairchild's original application notes for audio output stages.

What is the typical h_FE of KSC3076YTU at 1.5 A collector current?

The KSC3076YTU exhibits h_FE of 120–240 at V_CE = 2 V and I_C = 1.5 A, per its "Y" classification grade. This confirmed range supports predictable base drive calculation in power amplifier bias networks. The KSC3076YTU's h_FE2 specification directly references this test condition, distinguishing it from lower-gain variants.

Can KSC3076YTU be used in switching power supplies operating above 100 kHz?

Yes, the KSC3076YTU supports switching operation up to ~500 kHz in practical designs due to its f_T = 100 MHz and t_ON/t_F = 0.1 µs. However, switching losses increase significantly above 200 kHz; the KSC3076YTU is best applied in 50–150 kHz DC-DC converters where its V_CE(sat) = 0.5 V advantage outweighs MOSFET gate charge trade-offs.

What package type does KSC3076YTU use and how is it mounted?

The KSC3076YTU uses the I-Pak (TO-251AA) surface-mount package with three leads and an exposed collector tab. It is mounted directly onto a copper pour or thermal pad on the PCB, with the tab soldered for mechanical and thermal integrity. The KSC3076YTU's pin 2 (collector) connects electrically and thermally to this tab, requiring appropriate solder stencil and reflow profile for void-free attachment.

KSC3076YTU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 2 A

Voltage - Collector Emitter Breakdown (Max):: 50 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 50mA, 1A

Current - Collector Cutoff (Max):: 1µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 120 @ 500mA, 2V

Power - Max:: 1 W

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: IPAK

KSC3076YTU FAQ

1.How can I place an order for KSC3076YTU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSC3076YTU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for KSC3076YTU reliable?

The price and inventory of KSC3076YTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC3076YTU is usually 5 days.

3.What payment methods are accepted for KSC3076YTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC3076YTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSC3076YTU?

KSC3076YTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSC3076YTU order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for KSC3076YTU?

For technical support, including KSC3076YTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC3076YTU requirements.

6.How does Aetrix verify that KSC3076YTU is sourced from the original manufacturer or authorized distributors?

All KSC3076YTU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that KSC3076YTU meets industry standards.

7.What is the process for return or replacement of KSC3076YTU?

All KSC3076YTU units undergo pre-shipment inspection (PSI). If there is an issue with KSC3076YTU, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The KSC3076YTU part is unused and in its original packaging.

Return procedure for KSC3076YTU:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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