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onsemi KSC2310RBU
- Part No.:
- KSC2310RBU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 Long Body
- Datasheet:
-
KSC2310RBU.pdf
- Description:
- TRANS NPN 150V 0.05A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,412
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Product details
Overview
KSC2310RBU 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 hFE = 40–80 (R-class), housed in a TO-92L package.
For engineers reviewing the KSC2310RBU datasheet, pinout, applications, or equivalent options, key selection considerations include breakdown voltage margin, DC current gain consistency at 10 mA, saturation voltage under defined drive conditions, output capacitance for RF stability, and thermal derating behavior in linear amplifier stages.
Technical Context
This device operates as a medium-speed, high-voltage NPN bipolar junction transistor optimized for linear amplification and switching in analog signal chains and power control circuits. Its 100 MHz fT supports audio-frequency amplification and low-MHz switching, while its 200 V VCBO rating enables use in flyback snubbers and line-powered interface stages.
The R-class hFE bin (40–80) ensures predictable base drive requirements in fixed-bias amplifier designs, and the 0.5 V VCE(sat) at IC = 10 mA / IB = 1 mA confirms reliable on-state conduction with moderate base current. Cob = 3.5–5 pF at VCB = 10 V supports stable operation in tuned collector loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 200 V - Withstands up to 200 V reverse bias between collector and base, enabling use in high-side switch and flyback clamp configurations. |
| VCEO | 150 V - Maximum collector-emitter voltage before avalanche, suitable for 120 VAC-derived supply rails with safety margin. |
| hFE (R-class) | 40–80 - Predictable DC current gain range at VCE = 5 V, IC = 10 mA, simplifying bias network design for Class-A amplifiers. |
| fT | 100 MHz - Current gain bandwidth product confirming usable gain up to ~10 MHz in common-emitter configuration. |
| VCE(sat) | 0.5 V max at IC = 10 mA, IB = 1 mA - Low saturation voltage reduces power loss and self-heating during switching duty cycles. |
| Cob | 3.5–5 pF at VCB = 10 V - Output capacitance impacts high-frequency roll-off and stability in RF amplifier feedback networks. |
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; leads are tinned and solderable per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Reference node for base-emitter bias; connects to ground or low-impedance return path in common-emitter topology. |
| 2 (Collector) | Current source terminal | High-voltage output node; requires layout clearance ≥200 V creepage and ties to load or supply rail via current-limiting resistor. |
| 3 (Base) | Control input terminal | Accepts forward bias current to modulate collector current; driven by resistor-limited voltage source or digital logic with series impedance ≥1 kΩ. |
Key Features
| Feature | Design Value |
|---|---|
| High VCBO rating | 200 V - Enables direct interface with rectified 120 VAC lines without external clamping diodes. |
| R-class hFE binning | 40–80 - Reduces variation in base drive requirements across production lots for consistent amplifier biasing. |
| Low VCE(sat) | ≤0.5 V - Minimizes conduction loss in switching regulators and relay drivers operating below 50 mA load. |
| 100 MHz fT | Supports stable small-signal amplification up to 10 MHz with >10 dB gain margin in emitter-follower buffers. |
| TO-92L mechanical form | Standardized 3-pin through-hole footprint compatible with legacy PCB tooling and manual assembly workflows. |
Applications
| Audio Power Amplifier Stage | DC-DC Converter Switch |
|---|---|
Use Scenario: Single-ended Class-A preamplifier stage driving 10 kΩ load in battery-powered instrumentation. IC Role / Device Role / Timing Role: NPN transconductance element providing voltage gain and current buffering with fixed emitter degeneration. Use Value: 100 MHz fT ensures flat frequency response to 20 kHz; 150 V VCEO accommodates ±75 V supply rails with headroom. | Use Scenario: Low-duty-cycle switching element in isolated flyback auxiliary supply for industrial PLC I/O modules. IC Role / Device Role / Timing Role: High-voltage switch controlling primary-side current pulse in transformer-coupled power conversion. Use Value: 200 V VCBO withstands reflected voltage spikes; 0.5 V VCE(sat) limits conduction loss during 100 µs on-time pulses. |
| Voltage Regulator Pass Element | Signal Level Shifter |
Use Scenario: Series pass transistor in 12 V linear regulator supplying analog sensor circuitry from unregulated 24 V rail. IC Role / Device Role / Timing Role: Adjustable current source controlled by error amplifier feedback to maintain constant output voltage. Use Value: 800 mW PC and 150 °C TJ allow continuous operation at 12 V dropout × 50 mA = 600 mW dissipation with heatsink-free mounting. | Use Scenario: Logic-level translator between 3.3 V microcontroller GPIO and 12 V solenoid driver input. IC Role / Device Role / Timing Role: Inverting level shifter with open-collector output referenced to 12 V rail. Use Value: R-class hFE ensures reliable saturation with 1 mA base drive; 5 V VEBO prevents damage from 12 V pull-up transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-voltage amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| KSC2310OBU | hFE = 70–140 (O-class); otherwise identical absolute ratings and electrical specs. | Higher gain enables lower base drive current in low-power amplifier stages but increases sensitivity to thermal drift. | Select when tighter hFE tolerance is required for precision biasing; verify thermal stability in enclosed enclosures. |
| MPSA42 | VCBO = 300 V, VCEO = 300 V, fT = 50 MHz, TO-92 package (not TO-92L), hFE = 40–120. | Higher breakdown supports 230 VAC-derived supplies; lower fT limits use above 5 MHz. | Choose for universal-input offline power supplies where 300 V margin is mandatory; confirm pinout compatibility (E-C-B vs E-B-C). |
Compared with KSC2310RBU, KSC2310OBU offers higher and tighter hFE for improved gain consistency, while MPSA42 provides greater voltage headroom at the cost of bandwidth and requires pinout verification due to different lead assignment.
Availability
KSC2310RBU is available at Aetrix Electronics and suitable for audio amplifier stages, flyback converter switches, linear voltage regulator pass elements, and logic-level translation circuits requiring stable component supply across industrial and instrumentation programs.
Supply support for KSC2310RBU 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, high-performance silicon solutions for automotive, industrial, cloud computing, and IoT applications.
The KSC2310RBU belongs to Fairchild's legacy high-voltage bipolar transistor family, engineered for robust analog amplification and switching in cost-sensitive, reliability-critical power interface circuits.
FAQ
What is the pin configuration of the KSC2310RBU?
The KSC2310RBU uses a TO-92L package with pin 1 as Emitter, pin 2 as Collector, and pin 3 as Base. This E-C-B arrangement is confirmed in the original Fairchild datasheet Rev. A2 and matches standard TO-92L mechanical drawings. Always verify orientation using the flat side and lead spacing before PCB layout or assembly.
What does the 'R' suffix in KSC2310RBU signify?
The 'R' in KSC2310RBU denotes the hFE gain bin classification: 40–80 at VCE = 5 V and IC = 10 mA. This binning ensures predictable base current requirements in amplifier and switch designs. The full part number KSC2310RBU identifies both the device type and its specific DC current gain range.
Can KSC2310RBU replace MPSA42 in a 230 VAC-derived power supply?
No - KSC2310RBU has VCBO = 200 V and VCEO = 150 V, insufficient for reflected voltages in universal-input 230 VAC flyback designs. MPSA42 offers 300 V ratings and is rated for such applications. Substituting KSC2310RBU risks premature breakdown; always validate voltage stress margins using worst-case transient analysis before replacement.
What is the maximum power dissipation of KSC2310RBU at 70°C ambient?
KSC2310RBU has a rated PC = 800 mW at Ta = 25°C and a thermal derating slope of 8.0 mW/°C above 25°C. At 70°C ambient, allowable power drops to 800 mW − (45 × 8.0) = 440 mW. This value assumes no heatsink and free-air convection; board copper area and airflow significantly affect real-world capability.
Is KSC2310RBU suitable for RF amplifier applications above 30 MHz?
KSC2310RBU has fT = 100 MHz, but its usable small-signal gain falls rapidly above 10–15 MHz due to parasitic capacitance and package limitations. While it can operate as a broadband amplifier up to ~20 MHz, stable RF amplification above 30 MHz requires devices with higher fT, lower Cob, and SMT packaging. For 30+ MHz designs, consider RF-optimized transistors like MMBT2222A or BFR92A instead of KSC2310RBU.
KSC2310RBU 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):
- 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:
- 40 @ 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
KSC2310RBU FAQ
1.How can I place an order for KSC2310RBU through Aetrix?
Please submit a Request for Quotation (RFQ) for KSC2310RBU 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 KSC2310RBU reliable?
The price and inventory of KSC2310RBU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2310RBU is usually 5 days.
3.What payment methods are accepted for KSC2310RBU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2310RBU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSC2310RBU?
KSC2310RBU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSC2310RBU 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 KSC2310RBU?
For technical support, including KSC2310RBU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2310RBU requirements.
6.How does Aetrix verify that KSC2310RBU is sourced from the original manufacturer or authorized distributors?
All KSC2310RBU 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 KSC2310RBU meets industry standards.
7.What is the process for return or replacement of KSC2310RBU?
All KSC2310RBU units undergo pre-shipment inspection (PSI). If there is an issue with KSC2310RBU, 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 KSC2310RBU part is unused and in its original packaging.
Return procedure for KSC2310RBU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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