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onsemi KSC2328AYBU
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- Part No.:
- KSC2328AYBU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 Long Body
- Datasheet:
-
KSC2328AYBU.pdf
- Description:
- TRANS NPN 30V 2A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,991
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Product details
Overview
KSC2328AYBU from onsemi is an NPN epitaxial silicon transistor designed for audio power amplifier stages, delivering up to 3 W output with 30 V collector-emitter and collector-base breakdown voltage ratings, 2 A continuous collector current, and 1000 mW power dissipation in TO-92 package.
For engineers reviewing the KSC2328AYBU datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain (hFE = 160–320), saturation voltage (VCE(sat) ≤ 2.0 V at IC = 1.5 A), fT = 120 MHz bandwidth, thermal resistance (125 °C/W), and Pb-free TO-92 3 LF mechanical compatibility.
Technical Context
This discrete NPN bipolar junction transistor operates as a linear amplifying device in Class-A or Class-AB audio output stages. Its 120 MHz fT supports mid-frequency fidelity, while low VCE(sat) and high hFE enable efficient drive into 4–8 Ω speaker loads without excessive base drive current.
The device features complementary pairing with KSA928A for push-pull configurations and is characterized across −55 °C to +150 °C operating range. Absolute maximum ratings are defined at TA = 25 °C, with derating applied above ambient via 8.0 mW/°C thermal slope.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO / VCEO | 30 V - Supports rail voltages up to ±15 V in dual-supply audio amplifiers without breakdown. |
| IC (max) | 2 A - Enables direct drive of low-impedance speakers (e.g., 4 Ω) in single-ended output topologies. |
| PD (max) | 1000 mW - Sufficient for 3 W audio output with appropriate heatsinking and duty cycling. |
| hFE | 160–320 - Ensures stable biasing and low base drive loss in fixed-bias or emitter-follower configurations. |
| fT | 120 MHz - Maintains phase margin and frequency response integrity up to 20 kHz with minimal roll-off. |
| VCE(sat) | ≤2.0 V @ IC = 1.5 A - Minimizes conduction loss and thermal rise during peak output current delivery. |
| Cob | 30 pF - Limits Miller effect in common-emitter gain stages, supporting stable high-frequency operation. |
Pinout & Package
Package: TO-92 3 LF (Case 135AM), Pb-free, through-hole mounting. Dimensions: 8.0 mm × 4.9 mm × 3.6 mm (L×W×H), lead-formed.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or negative rail in common-emitter amplifiers; defines reference for bias network. |
| 2 (Collector) | Current source terminal | Drives load (e.g., speaker, transformer primary); requires heat path to PCB copper for thermal management. |
| 3 (Base) | Control input terminal | Accepts low-current drive signal; requires series resistor to limit IB and ensure hFE-dependent bias stability. |
Key Features
| Feature | Design Value |
|---|---|
| Audio power amplifier optimized | Validated 3 W output capability with low distortion in Class-A/AB configurations per datasheet test conditions. |
| Complementary pair with KSA928A | Enables matched push-pull output stage design with symmetrical gain, VBE, and thermal tracking. |
| Pb-free TO-92 3 LF packaging | Meets RoHS Directive 2011/65/EU; compatible with standard wave-solder and hand-solder processes. |
| High fT and low Cob | 120 MHz gain-bandwidth and 30 pF output capacitance support wideband linearity up to 20 kHz. |
| 150 °C max junction temperature | Allows operation in enclosed enclosures or near heat-generating components without derating below rated PD. |
Applications
| Audio Power Amplifier | Small-Signal Driver Stage |
|---|---|
Use Scenario: Final output stage in portable AM/FM radio receivers delivering 3 W into 8 Ω speaker load. IC Role / Device Role / Timing Role: NPN power switching and linear amplification element in single-ended Class-A topology. Use Value: Low VCE(sat) minimizes power loss and thermal stress; hFE range ensures consistent gain across production lots. | Use Scenario: Medium-gain driver for relay coils or small solenoids requiring 1.5 A peak current pulses. IC Role / Device Role / Timing Role: Switching transistor controlling inductive load via microcontroller GPIO with flyback diode protection. Use Value: 30 V VCBO rating accommodates back-EMF spikes; 2 A IC rating supports reliable turn-on under load transients. |
| Complementary Push-Pull Output | DC Power Supply Regulator |
Use Scenario: Upper NPN half of complementary pair with KSA928A in Class-B headphone amplifier output stage. IC Role / Device Role / Timing Role: Active pull-up device synchronized with PNP counterpart to deliver full-wave audio waveform. Use Value: Matched hFE classification (Y-grade) and thermal characteristics enable balanced crossover behavior and low THD. | Use Scenario: Pass transistor in linear adjustable voltage regulator supplying 12 V @ 1.2 A to analog sensor circuitry. IC Role / Device Role / Timing Role: Series pass element dissipating excess voltage between unregulated input and regulated output. Use Value: 1000 mW PD and 125 °C/W RθJA allow stable operation with minimal heatsink area at 2.5 V dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD2955G | TO-220 package, higher PD (15 W), lower fT (3 MHz), complementary PNP | Designed for higher-power linear regulators and motor drivers, not audio amplification | Select only when >3 W output or surface-mount thermal management is required |
| 2N5551 | TO-92, lower IC (600 mA), higher VCEO (160 V), fT = 100 MHz | General-purpose switching/amplification; insufficient current for 3 W audio loads | Use only in low-power preamp or signal conditioning stages, not final output |
Compared with MJD2955G and 2N5551, the KSC2328AYBU uniquely balances TO-92 form factor, 2 A current capability, 120 MHz fT, and audio-optimized gain linearity-making it suitable where compact size, moderate power, and fidelity matter.
Availability
KSC2328AYBU is available at Aetrix Electronics and suitable for audio power amplifiers, relay drivers, linear voltage regulators, and complementary output stages requiring stable component supply and Pb-free compliance.
Supply support for KSC2328AYBU 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, serving automotive, industrial, cloud, and consumer markets with discrete, analog, and logic solutions.
The KSC2328AYBU belongs to onsemi's legacy general-purpose bipolar transistor product line, engineered specifically for cost-sensitive, medium-power linear and switching applications in audio and power control systems.
FAQ
What is the pin configuration of the KSC2328AYBU?
The KSC2328AYBU uses a standard TO-92 3-pin configuration: Pin 1 is Emitter, Pin 2 is Collector, and Pin 3 is Base. This layout matches JEDEC TO-92 mechanical outline Case 135AM and is verified in the official onsemi datasheet revision 5. The KSC2328AYBU pinout supports common-emitter amplifier designs with grounded-emitter topology and base bias networks.
Is the KSC2328AYBU RoHS-compliant and halogen-free?
Yes, the KSC2328AYBU is Pb-free and RoHS-compliant per EU Directive 2011/65/EU, as confirmed by its "TO-92 3 LF" designation and marking diagram in the onsemi datasheet. It contains no intentionally added halogens and meets IPC-1752A material declaration requirements. The KSC2328AYBU is suitable for environmentally regulated industrial and consumer products.
What is the hFE classification for KSC2328AYBU?
The "Y" suffix in KSC2328AYBU indicates hFE classification Y, corresponding to a DC current gain range of 160–320 at VCE = 2 V and IC = 500 mA. This is distinct from the "O" grade (100–200). The KSC2328AYBU's tighter hFE bin improves consistency in production biasing and reduces need for trim resistors in amplifier circuits.
Can KSC2328AYBU replace KSC2328AOTA in existing designs?
Yes, KSC2328AYBU and KSC2328AOTA share identical electrical specifications, TO-92 3 LF package, and Pb-free construction. The only difference is packaging format: KSC2328AYBU ships in bulk bags (6000 units), while KSC2328AOTA uses fan-fold tape. No PCB or schematic changes are needed when substituting KSC2328AYBU for KSC2328AOTA.
Does KSC2328AYBU have a documented safe operating area (SOA)?
Yes, the KSC2328AYBU SOA is documented in Figure 5 of the onsemi datasheet, showing DC and pulsed limits up to 1 ms. At 25 °C case temperature, it supports 1.5 A at 10 V VCE and scales with thermal derating. The KSC2328AYBU SOA validation ensures reliability in transient-loaded audio and switching applications without secondary breakdown risk.
KSC2328AYBU 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):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 30 V
- Vce Saturation (Max) @ Ib, Ic:
- 2V @ 30mA, 1.5A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 160 @ 500mA, 2V
- Power - Max:
- 1 W
- Frequency - Transition:
- 120MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
KSC2328AYBU FAQ
1.How can I place an order for KSC2328AYBU through Aetrix?
Please submit a Request for Quotation (RFQ) for KSC2328AYBU 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 KSC2328AYBU reliable?
The price and inventory of KSC2328AYBU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2328AYBU is usually 5 days.
3.What payment methods are accepted for KSC2328AYBU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2328AYBU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSC2328AYBU?
KSC2328AYBU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSC2328AYBU 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 KSC2328AYBU?
For technical support, including KSC2328AYBU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2328AYBU requirements.
6.How does Aetrix verify that KSC2328AYBU is sourced from the original manufacturer or authorized distributors?
All KSC2328AYBU 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 KSC2328AYBU meets industry standards.
7.What is the process for return or replacement of KSC2328AYBU?
All KSC2328AYBU units undergo pre-shipment inspection (PSI). If there is an issue with KSC2328AYBU, 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 KSC2328AYBU part is unused and in its original packaging.
Return procedure for KSC2328AYBU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KSC2328AYBU Tags
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