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

onsemi KSC2316OBU

Name: KSC2316OBU
Brand: onsemi
SKU: KSC2316OBU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSC2316OBU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 Long Body

Datasheet:: KSC2316OBU.pdf

Description:: TRANS NPN 120V 0.8A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSC2316OBU from ON Semiconductor is an NPN epitaxial silicon transistor in TO-92L package, rated for 120 V CBO/CEO, 800 mA collector current, 900 mW power dissipation, and 120 MHz f_T, used as audio power amplifier and driver-stage transistor in consumer audio equipment.

For engineers reviewing the KSC2316OBU datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal behavior, h_FE classification (O-grade: 80–160 at I_C = 100 mA), safe operating area limits, and complementary pairing with KSA916.

Technical Context

This discrete NPN bipolar junction transistor features epitaxial base construction for stable high-frequency gain and low saturation voltage. Its 120 V breakdown ratings support operation in medium-voltage linear and switching amplifier stages without derating under typical ambient conditions.

The device exhibits a DC current gain (h_FE) of 80–160 at V_CE = 5 V and I_C = 100 mA, with V_CE(sat) ≤ 1.0 V at I_C = 500 mA / I_B = 50 mA, enabling efficient Class-A/B audio output drive and relay/LED driver switching with minimal conduction loss.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CBO	120 V - Supports collector-base bias up to 120 V without avalanche breakdown, suitable for high-voltage preamp coupling.
I_C	800 mA - Maximum continuous collector current enables driving 8 Ω speakers at ~1 W output in single-ended configurations.
P_D	900 mW - Power dissipation limit at T_A = 25°C; derates 7.2 mW/°C above ambient, defining thermal design margin for PCB layout.
f_T	120 MHz - Current-gain bandwidth product confirms usable gain up to mid-VHF range, supporting wideband audio and RF driver applications.
h_FE (O grade)	80–160 - Verified DC current gain range at I_C = 100 mA ensures predictable bias stability in fixed-bias and emitter-degenerated amplifier topologies.
V_CE(sat)	≤1.0 V - Low saturation voltage at high drive current reduces power loss and heat generation in switching-mode driver circuits.
C_ob	30 pF - Output capacitance at V_CB = 10 V enables accurate high-frequency impedance modeling in tuned amplifier and oscillator designs.

Pinout & Package

Package: TO-92L (3-lead, non-JEDEC 8 mm tall body, lead form TA type). Pin configuration confirmed per Fairchild KSC2316 Rev. 1.4 datasheet Figure 6.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-impedance return path; defines reference for V_BE and sets emitter current magnitude.
2 (Collector)	Current source terminal	Connected to load (e.g., speaker, relay coil); carries amplified output current and sustains high-voltage swing up to 120 V.
3 (Base)	Control input terminal	Receives bias current to modulate collector-emitter conduction; requires current-limiting resistor to prevent overdrive and thermal runaway.

Key Features

Feature	Design Value
Complementary pairing	Explicitly designed as NPN complement to KSA916 PNP transistor, enabling matched push-pull output stages with balanced thermal and gain characteristics.
Audio power amplification	Optimized h_FE linearity and low V_CE(sat) support clean Class-A/B audio output with <1% THD in low-power speaker drivers.
Driver stage capability	Rated for 800 mA I_C and 900 mW P_D, allowing direct interface to relays, small solenoids, and LED arrays without external buffering.
High-voltage tolerance	120 V V_CBO/V_CEO permits use in 24–48 V industrial control circuits and CRT deflection yoke drivers without snubbing.

Applications

Hi-Fi Audio Preamp Stage	DC Motor Speed Control
Use Scenario: Amplifying line-level signals before power amplification in compact stereo receivers and portable audio docks. IC Role / Device Role / Timing Role: NPN transistor configured in common-emitter topology to provide voltage and current gain with low distortion. Use Value: 120 MHz f_T and 80–160 h_FE ensure flat frequency response up to 20 kHz and stable bias across temperature in unregulated supply environments.	Use Scenario: Switching PWM-controlled current to brushed DC motors in robotics and home appliances. IC Role / Device Role / Timing Role: Medium-power NPN switch controlling motor winding current via base-driven saturation. Use Value: V_CE(sat) ≤ 1.0 V at 500 mA minimizes conduction loss and self-heating during continuous PWM operation at 1–20 kHz.
Relay Driver Circuit	LED Array Driver
Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules and HVAC control panels. IC Role / Device Role / Timing Role: High-current NPN switch providing galvanic isolation between microcontroller GPIO and relay coil. Use Value: 800 mA I_C rating supports coils drawing up to 700 mA, while 120 V V_CEO withstands inductive kickback without clamp diode.	Use Scenario: Direct-driving parallel strings of white LEDs in signage and indicator panels. IC Role / Device Role / Timing Role: Constant-current linear regulator element using emitter degeneration resistor. Use Value: Tight h_FE spread (80–160) and low V_CE(sat) enable precise current setting and <±3% LED brightness uniformity across batches.

Hi-Fi Audio Preamp Stage

DC Motor Speed Control

Use Scenario: Amplifying line-level signals before power amplification in compact stereo receivers and portable audio docks.

IC Role / Device Role / Timing Role: NPN transistor configured in common-emitter topology to provide voltage and current gain with low distortion.

Use Value: 120 MHz f_T and 80–160 h_FE ensure flat frequency response up to 20 kHz and stable bias across temperature in unregulated supply environments.

Use Scenario: Switching PWM-controlled current to brushed DC motors in robotics and home appliances.

IC Role / Device Role / Timing Role: Medium-power NPN switch controlling motor winding current via base-driven saturation.

Use Value: V_CE(sat) ≤ 1.0 V at 500 mA minimizes conduction loss and self-heating during continuous PWM operation at 1–20 kHz.

Relay Driver Circuit

LED Array Driver

Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules and HVAC control panels.

IC Role / Device Role / Timing Role: High-current NPN switch providing galvanic isolation between microcontroller GPIO and relay coil.

Use Value: 800 mA I_C rating supports coils drawing up to 700 mA, while 120 V V_CEO withstands inductive kickback without clamp diode.

Use Scenario: Direct-driving parallel strings of white LEDs in signage and indicator panels.

IC Role / Device Role / Timing Role: Constant-current linear regulator element using emitter degeneration resistor.

Use Value: Tight h_FE spread (80–160) and low V_CE(sat) enable precise current setting and <±3% LED brightness uniformity across batches.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC548C	Lower V_CEO (30 V), lower I_C (100 mA), higher h_FE (420 max), TO-92 package	Not suitable for >30 V or >100 mA loads; limited to low-voltage signal amplification only	Select only for sub-30 V, low-current signal switching where gain >400 is required.
MPSA18	Higher V_CEO (45 V), same I_C (500 mA), lower h_FE (100 min), TO-92 package	Insufficient voltage headroom for 120 V applications; inadequate for full-power audio output stages	Acceptable for 45 V-rated driver circuits but cannot replace KSC2316OBU in high-voltage or high-current roles.

Compared with BC548C and MPSA18, KSC2316OBU uniquely combines 120 V breakdown, 800 mA current, and 120 MHz f_T in TO-92L-enabling single-transistor solutions in medium-power audio, relay, and motor control where both voltage and current margins are critical.

Availability

KSC2316OBU is available at Aetrix Electronics and suitable for audio power amplifiers, relay driver circuits, and DC motor speed controllers requiring stable component supply and long-term industrial availability.

Supply support for KSC2316OBU 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

KSC2316OBU belongs to ON Semiconductor's legacy general-purpose bipolar transistor portfolio, originally developed by Fairchild for cost-sensitive, medium-power linear and switching applications in audio, control, and instrumentation systems.

FAQ

What is the h_FE classification for KSC2316OBU?

The "O" suffix in KSC2316OBU denotes the h_FE grade: 80–160 at V_CE = 5 V and I_C = 100 mA, per Fairchild KSC2316 Rev. 1.4 datasheet Table on page 2. This binning ensures consistent gain performance for bias-critical amplifier and driver designs. KSC2316OBU is not interchangeable with Y-grade (120–240) without circuit revalidation.

Is KSC2316OBU pin-compatible with KSC2316YTA?

Yes-KSC2316OBU and KSC2316YTA share identical TO-92L package, pinout (Emitter–Collector–Base), and absolute maximum ratings. The only difference is h_FE grading: O-grade (80–160) vs. Y-grade (120–240). KSC2316OBU can be substituted in YTA-designated footprints if gain range meets circuit requirements.

What is the maximum safe operating collector current for KSC2316OBU at 70°C ambient?

At T_A = 70°C, KSC2316OBU's power dissipation derates to 900 mW − (70−25) × 7.2 mW = 576 mW. With V_CE(sat) ≤ 1.0 V, maximum safe I_C ≈ 576 mA under saturated switching. For linear operation, thermal limits and SOA curves (Figure 5) restrict I_C to ≤ 400 mA at V_CE = 10 V to avoid second breakdown. KSC2316OBU must be heatsinked or airflow-cooled beyond these points.

Does KSC2316OBU require a base current limiting resistor in common-emitter configuration?

Yes-KSC2316OBU requires an external base resistor to limit I_B and prevent thermal runaway. For example, driving 500 mA I_C with minimum h_FE = 80 demands ≥6.25 mA I_B; with 5 V GPIO, a 680 Ω resistor ensures safe base drive. Without it, excessive I_B causes localized heating and permanent h_FE degradation. This applies universally to all KSC2316OBU implementations.

How does KSC2316OBU compare to its PNP complement KSA916?

KSC2316OBU (NPN) and KSA916 (PNP) share matched V_CEO/V_CBO (120 V), I_C (800 mA), P_D (900 mW), and f_T (120 MHz), enabling symmetrical push-pull output stages. Their h_FE ranges are aligned (KSA916 O-grade: 80–160), ensuring balanced drive capability. KSC2316OBU and KSA916 are explicitly designated as complementary pairs in the original Fairchild documentation.

KSC2316OBU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 Long Body

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 800 mA

Voltage - Collector Emitter Breakdown (Max):: 120 V

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

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 80 @ 100mA, 5V

Power - Max:: 900 mW

Frequency - Transition:: 120MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

KSC2316OBU FAQ

1.How can I place an order for KSC2316OBU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSC2316OBU 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 KSC2316OBU reliable?

The price and inventory of KSC2316OBU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2316OBU is usually 5 days.

3.What payment methods are accepted for KSC2316OBU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2316OBU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSC2316OBU?

KSC2316OBU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSC2316OBU 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 KSC2316OBU?

For technical support, including KSC2316OBU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2316OBU requirements.

6.How does Aetrix verify that KSC2316OBU is sourced from the original manufacturer or authorized distributors?

All KSC2316OBU 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 KSC2316OBU meets industry standards.

7.What is the process for return or replacement of KSC2316OBU?

All KSC2316OBU units undergo pre-shipment inspection (PSI). If there is an issue with KSC2316OBU, 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 KSC2316OBU part is unused and in its original packaging.

Return procedure for KSC2316OBU:

1.Submit a request within 90 days.

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

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