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onsemi KSC2328AOTA
- Part No.:
- KSC2328AOTA
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
KSC2328AOTA.pdf
- Description:
- TRANS NPN 30V 2A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,844
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Product details
Overview
KSC2328AOTA 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, 2 A continuous collector current, and 1000 mW power dissipation in TO-92 3 LF (Case 135AM) package.
For engineers reviewing the KSC2328AOTA datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain (hFE = 100–320), saturation voltage (VCE(sat) ≤ 2.0 V at IC = 1.5 A), fT = 120 MHz bandwidth, thermal resistance (RθJA = 125 °C/W), and Pb-free TO-92 leadform compatibility.
Technical Context
This discrete NPN bipolar junction transistor operates as a linear amplifying device in Class-A or Class-AB audio output stages. It features low VCE(sat) for efficient power delivery and high hFE to reduce base drive requirements in low-to-moderate-power amplifier designs.
Its 120 MHz fT supports stable operation up to mid-audio frequencies, while the 30 V VCEO rating enables use in single-supply 24 V rail systems. The device is specified for TJ = 150 °C maximum and requires PCB-level thermal management per FR-4 layout guidelines (76 mm × 114 mm, minimum land pattern).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO / VCEO | 30 V - Supports 24 V rail operation with 20% margin against transients |
| IC (max) | 2 A - Enables 3 W audio output into 8 Ω load with headroom |
| PD (max) | 1000 mW - Requires heatsinking or board copper area for sustained operation |
| hFE | 100–320 - Reduces base current demand in driver stage design |
| fT | 120 MHz - Ensures flat gain response across full audio band (20 Hz–20 kHz) |
| VCE(sat) | ≤2.0 V @ IC = 1.5 A - Minimizes conduction loss and thermal rise in output stage |
| RθJA | 125 °C/W - Dictates minimum PCB copper area (76 mm × 114 mm FR-4) for safe ambient operation |
Pinout & Package
Package: TO-92 3 LF (Pb-Free), Case 135AM, 8.0 mm × 4.9 mm leadformed outline. Standard through-hole mounting with 2.54 mm pin pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-impedance return path in common-emitter amplifier |
| 2 (Collector) | Current source terminal | Drives output load (e.g., speaker transformer or 8 Ω transducer) with minimal saturation loss |
| 3 (Base) | Control input terminal | Receives bias current to set operating point; requires current-limiting resistor in series |
Key Features
| Feature | Design Value |
|---|---|
| Audio power amplifier optimized | Validated for 3 W output in Class-A/AB configurations with low distortion |
| Complementary pair to KSA928A | Enables push-pull topology when paired with PNP KSA928A in same package |
| Pb-free TO-92 3 LF | RoHS-compliant leadform meets IPC/JEDEC J-STD-020 reflow profile for leaded assembly |
| High fT (120 MHz) | Ensures stable small-signal gain beyond 20 kHz, supporting wideband audio fidelity |
| Low VCE(sat) (≤2.0 V) | Reduces power loss and thermal stress during high-current conduction phases |
Applications
| Portable Audio Amplifier | Intercom Output Stage |
|---|---|
Use Scenario: Battery-powered handheld speaker system requiring compact, low-cost 2–3 W mono output. IC Role / Device Role / Timing Role: NPN output transistor in single-ended Class-A amplifier driving 8 Ω speaker directly. Use Value: Delivers 3 W output with <2.0 V saturation drop, minimizing battery drain and heat buildup in confined enclosure. | Use Scenario: Two-way voice intercom unit with local speaker playback and line-level microphone preamp coupling. IC Role / Device Role / Timing Role: Final-stage power buffer amplifying audio signal to drive 16 Ω intercom speaker. Use Value: High hFE (100–320) reduces required base drive current from preceding op-amp stage, simplifying bias network. |
| Small-Signal RF Driver | DC Motor Speed Control |
Use Scenario: Low-power VHF transmitter final stage driving 50 Ω antenna load below 30 MHz. IC Role / Device Role / Timing Role: Linear RF amplifier biased in Class-A for low-distortion carrier amplification. Use Value: 120 MHz fT ensures usable gain up to 30 MHz, validated in typical performance curves (Fig. 2). | Use Scenario: 24 V brushed DC motor control in industrial actuator with PWM-based speed regulation. IC Role / Device Role / Timing Role: Low-side switch in emitter-follower configuration for analog current limiting. Use Value: 30 V VCEO and 2 A IC rating support 24 V motor supply with transient margin; TO-92 allows direct PCB mounting near motor driver IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN audio power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2N5551 | Lower IC (600 mA), lower PD (625 mW), higher VCEO (160 V), fT = 100 MHz | Not suitable for 3 W output; limited to preamp or switching roles | Select only if voltage margin >100 V is required and power <0.5 W |
| MPSA13 | Higher hFE (50–250), same TO-92, but IC = 500 mA, PD = 625 mW, VCEO = 30 V | Cannot sustain 2 A or 3 W output; suited for Darlington driver, not final stage | Use only in low-current buffer or Darlington base-drive applications |
Compared with 2N5551 and MPSA13, the KSC2328AOTA uniquely combines 2 A IC, 1000 mW PD, and 30 V ratings in TO-92-enabling true 3 W audio output where alternatives fall short in current or power handling.
Availability
KSC2328AOTA is available at Aetrix Electronics and suitable for portable audio amplifiers, intercom systems, low-power RF drivers, and DC motor control circuits requiring stable component supply and RoHS-compliant packaging.
Supply support for KSC2328AOTA 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 specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The KSC2328AOTA belongs to onsemi's legacy discrete transistor product line, engineered specifically for cost-sensitive, medium-power linear amplification and switching applications in audio and industrial control systems.
FAQ
What is the maximum continuous collector current rating for KSC2328AOTA?
The KSC2328AOTA has a maximum continuous collector current (IC) rating of 2 A at TA = 25 °C. Derating applies above 25 °C per the 8.0 mW/°C thermal derating curve. This rating assumes proper PCB thermal management using the specified FR-4 layout (76 mm × 114 mm). Exceeding 2 A without adequate heatsinking risks junction temperature exceeding 150 °C and permanent device failure.
Is KSC2328AOTA pin-compatible with KSA928A?
No, KSC2328AOTA is not pin-compatible with KSA928A. While both are TO-92 packaged devices and function as complementary NPN/PNP pairs, their pinouts differ: KSC2328AOTA uses Emitter–Collector–Base (1–2–3), whereas KSA928A uses Emitter–Base–Collector (1–3–2). This difference requires PCB layout adaptation when implementing push-pull topologies.
Does KSC2328AOTA support Pb-free soldering processes?
Yes, KSC2328AOTA is manufactured in a Pb-free TO-92 3 LF package (Case 135AM) and complies with RoHS Directive 2011/65/EU. It is qualified for standard SnPb and Pb-free reflow profiles per IPC/JEDEC J-STD-020, including peak temperatures up to 260 °C for 10 seconds. The device marking "KSC2328A" and date code appear on the package body.
What is the typical DC current gain (hFE) range for KSC2328AOTA at 500 mA collector current?
The KSC2328AOTA exhibits hFE between 100 and 320 at VCE = 2 V and IC = 500 mA, depending on hFE classification (O = 100–200, Y = 160–320). This wide gain spread requires circuit-level tolerance design-such as emitter degeneration or feedback stabilization-to ensure consistent biasing across production lots.
Can KSC2328AOTA be used in switching applications?
Yes, KSC2328AOTA can be used in low-frequency switching applications (e.g., <100 kHz PWM motor control), provided VCE(sat) ≤ 2.0 V at IC = 1.5 A and IB ≥ 30 mA is maintained for full saturation. However, its 120 MHz fT and lack of specified switching times mean it is not optimized for high-speed digital switching; dedicated switching transistors like MMBT2222A offer faster turn-on/turn-off characteristics.
KSC2328AOTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Packaging:
- Tape & Reel (TR)
- 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:
- 100 @ 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
KSC2328AOTA FAQ
1.How can I place an order for KSC2328AOTA through Aetrix?
Please submit a Request for Quotation (RFQ) for KSC2328AOTA 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 KSC2328AOTA reliable?
The price and inventory of KSC2328AOTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2328AOTA is usually 5 days.
3.What payment methods are accepted for KSC2328AOTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2328AOTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSC2328AOTA?
KSC2328AOTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSC2328AOTA 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 KSC2328AOTA?
For technical support, including KSC2328AOTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2328AOTA requirements.
6.How does Aetrix verify that KSC2328AOTA is sourced from the original manufacturer or authorized distributors?
All KSC2328AOTA 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 KSC2328AOTA meets industry standards.
7.What is the process for return or replacement of KSC2328AOTA?
All KSC2328AOTA units undergo pre-shipment inspection (PSI). If there is an issue with KSC2328AOTA, 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 KSC2328AOTA part is unused and in its original packaging.
Return procedure for KSC2328AOTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KSC2328AOTA Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
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MMBT3906-7-F
Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
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MMBTA06LT1G
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MMBT2222ALT1G
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