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onsemi KSC2310OTA
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- Part No.:
- KSC2310OTA
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
KSC2310OTA.pdf
- Description:
- TRANS NPN 150V 0.05A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,490
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Product details
Overview
KSC2310OTA from ON Semiconductor (formerly Fairchild) is an NPN epitaxial silicon transistor designed for high-voltage power amplifier and switching applications, featuring VCBO = 200 V, VCEO = 150 V, IC = 50 mA, fT = 100 MHz, and TO-92L package. It operates reliably in audio output stages and relay drivers where moderate gain and high breakdown voltage are required.
For engineers reviewing the KSC2310OTA datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain classification (R/O/Y), collector-emitter saturation voltage at defined bias points, safe operating area derating, junction temperature limit, and output capacitance for RF-sensitive designs.
Technical Context
This NPN bipolar junction transistor uses epitaxial base construction to achieve stable hFE across IC = 10 mA and supports high-voltage operation up to 200 V collector-base. Its fT of 100 MHz at VCE = 30 V and IC = 10 mA enables use in wideband amplification up to low-VHF frequencies.
The device exhibits low Cob (3.5–5 pF at VCB = 10 V), enabling predictable frequency response in tuned amplifier stages. Saturation behavior is characterized with VCE(sat) ≤ 0.5 V at IC = 10 mA / IB = 1 mA, supporting efficient switching in low-power digital interface circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 200 V - maximum reverse-biased collector-base voltage before breakdown; defines high-side switch headroom |
| VCEO | 150 V - maximum collector-emitter voltage under open-base condition; sets amplifier stage rail limit |
| hFE (Min/Max) | 40–240 - DC current gain range across R/O/Y classifications; determines base drive sizing margin |
| fT | 100 MHz - unity-gain bandwidth at VCE = 30 V, IC = 10 mA; indicates usable small-signal amplification range |
| VCE(sat) | ≤ 0.5 V at IC = 10 mA, IB = 1 mA - low saturation voltage reduces conduction loss in switching mode |
| Cob | 3.5–5 pF at VCB = 10 V, f = 1 MHz - output capacitance affects high-frequency gain roll-off and stability |
| PC | 800 mW - maximum power dissipation at Ta = 25°C; requires thermal derating above 25°C ambient |
Pinout & Package
Package: TO-92L - molded plastic case with 3.90 mm lead spacing, 13.50 mm overall length, and 1.45 mm body width; optimized for through-hole mounting and manual assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current sink terminal; connects to ground or low-impedance return path in common-emitter configuration |
| 2 | Collector | High-voltage output node; interfaces with load, supply rail, or next-stage input in amplifier/switch roles |
| 3 | Base | Control input; requires current-limited drive to bias transistor into active or saturation region |
Key Features
| Feature | Design Value |
|---|---|
| High VCBO rating | 200 V enables use in 120 VAC line-derived supplies and flyback snubber circuits without additional clamping |
| Classified hFE groups | R/O/Y bins (40–80 / 70–140 / 120–240) allow consistent gain matching in production amplifier modules |
| Low VCE(sat) | ≤ 0.5 V at rated IC/IB ensures <5% voltage drop in saturated switching, minimizing heat generation |
| Controlled Cob | 3.5–5 pF output capacitance supports stable gain in 10–50 MHz RF driver stages with minimal neutralization |
| Junction temperature limit | 150°C TJ max allows operation in sealed enclosures up to 100°C ambient with appropriate PCB copper pour |
Applications
| Audio Power Amplifier Stage | DC Relay Driver |
|---|---|
Use Scenario: Final output stage in low-power mono audio amplifiers driving 8 Ω speakers from ±12 V rails. IC Role / Device Role / Timing Role: NPN power switch amplifying base-driven signal to deliver peak currents up to 40 mA into reactive load. Use Value: High VCEO (150 V) prevents breakdown during speaker back-EMF transients; hFE ≥ 70 ensures sufficient drive with minimal base current. | Use Scenario: Driving 12 V DC coil relays with 200–500 Ω resistance in industrial control I/O modules. IC Role / Device Role / Timing Role: Saturated switch turning relay on/off via microcontroller GPIO with current limiting resistor. Use Value: VCE(sat) ≤ 0.5 V minimizes coil voltage drop; 800 mW PC accommodates brief inrush without heatsink. |
| High-Voltage Signal Switching | Low-Frequency Oscillator Active Device |
Use Scenario: Switching 100 V DC signals in test equipment multiplexers or programmable load banks. IC Role / Device Role / Timing Role: High-breakdown NPN switch controlled by optocoupler-isolated logic to isolate control and power domains. Use Value: VCBO = 200 V provides 2× safety margin over 100 V rail; low ICBO (<0.1 µA) ensures minimal leakage in off-state. | Use Scenario: Active element in 1–5 kHz Hartley or Colpitts oscillators for sensor excitation or clock reference generation. IC Role / Device Role / Timing Role: Gain block sustaining oscillation via tuned LC tank feedback with emitter degeneration. Use Value: fT = 100 MHz ensures ample gain margin at 5 kHz; classified hFE supports repeatable startup and amplitude stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-voltage transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC548C | Lower VCBO (30 V), higher hFE (420–800), same TO-92 package but not rated for >60 V operation | Suitable only for low-voltage signal amplification; cannot replace KSC2310OTA in >60 V circuits | Select only when supply rails remain ≤ 24 V and high breakdown is unnecessary |
| MPSA42 | Higher VCBO (300 V), lower fT (50 MHz), same TO-92 package, hFE = 50–250 at IC = 10 mA | Better suited for 200 V+ switching but less ideal for >10 MHz amplification due to reduced bandwidth | Prefer for flyback snubbers or AC mains isolation; avoid where 100 MHz fT is required |
Compared with BC548C and MPSA42, the KSC2310OTA uniquely balances 200 V breakdown, 100 MHz fT, and TO-92L mechanical compatibility-making it optimal for cost-sensitive, medium-frequency, medium-voltage amplifier and switching tasks where both voltage headroom and bandwidth matter.
Availability
KSC2310OTA is available at Aetrix Electronics and suitable for audio amplifier design, relay interface modules, high-voltage signal switching, and low-frequency oscillator circuits requiring stable component supply and long-term obsolescence management.
Supply support for KSC2310OTA 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, and IoT applications.
The KSC2310OTA belongs to Fairchild's legacy general-purpose bipolar transistor family, engineered for reliable high-voltage linear and switching operation in cost-sensitive consumer and industrial electronics.
FAQ
What is the maximum collector-emitter voltage rating for the KSC2310OTA?
The KSC2310OTA has a guaranteed minimum BVCEO of 150 V at IC = 5 mA and IB = 0. This rating defines the absolute upper limit for collector-emitter voltage in open-base configurations and must be respected with appropriate safety margins in circuit design. Derating is required above 25°C ambient per the published power derating curve.
Does the KSC2310OTA have a specified hFE classification, and how does it affect circuit design?
Yes-the KSC2310OTA is manufactured in three hFE classifications: R (40–80), O (70–140), and Y (120–240). Designers must specify the required bin when ordering, as gain variation directly impacts base resistor selection, stability in amplifier feedback loops, and saturation depth in switching applications. The KSC2310OTA datasheet provides test conditions and bin marking details.
What is the typical output capacitance (Cob) of the KSC2310OTA, and why does it matter?
The KSC2310OTA exhibits Cob = 3.5–5 pF measured at VCB = 10 V and f = 1 MHz. This parameter directly influences high-frequency gain roll-off, phase margin in amplifier stages, and parasitic resonance in switching waveforms. Low Cob supports stable operation in RF driver and wideband amplifier designs where unintended capacitive coupling could degrade performance.
Can the KSC2310OTA be used in switching power supply applications?
The KSC2310OTA can be used in low-frequency (<100 kHz), low-power switching applications such as auxiliary bias supplies or discrete PWM controllers-but it is not optimized for high-efficiency SMPS due to lack of fast recovery specs, unspecified switching times, and absence of avalanche-rated ruggedness. For primary-side switching, dedicated power transistors or MOSFETs are preferred. The KSC2310OTA remains viable for secondary-side signal-level switching or gate driving.
Is the KSC2310OTA pin-compatible with other TO-92 transistors like the 2N3904?
No-the KSC2310OTA uses TO-92L pinout (Emitter–Collector–Base), whereas the 2N3904 uses standard TO-92 (Emitter–Base–Collector). Swapping them without board revision will result in incorrect biasing and potential device failure. Always verify pin assignment using the official KSC2310OTA package drawing before layout or replacement. The KSC2310OTA pinout is explicitly defined as Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base.
KSC2310OTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 50 mA
- Voltage - Collector Emitter Breakdown (Max):
- 150 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 1mA, 10mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 70 @ 10mA, 5V
- Power - Max:
- 800 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
KSC2310OTA FAQ
1.How can I place an order for KSC2310OTA through Aetrix?
Please submit a Request for Quotation (RFQ) for KSC2310OTA 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 KSC2310OTA reliable?
The price and inventory of KSC2310OTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2310OTA is usually 5 days.
3.What payment methods are accepted for KSC2310OTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2310OTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSC2310OTA?
KSC2310OTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSC2310OTA 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 KSC2310OTA?
For technical support, including KSC2310OTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2310OTA requirements.
6.How does Aetrix verify that KSC2310OTA is sourced from the original manufacturer or authorized distributors?
All KSC2310OTA 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 KSC2310OTA meets industry standards.
7.What is the process for return or replacement of KSC2310OTA?
All KSC2310OTA units undergo pre-shipment inspection (PSI). If there is an issue with KSC2310OTA, 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 KSC2310OTA part is unused and in its original packaging.
Return procedure for KSC2310OTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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