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onsemi KSB1015OTU
- Part No.:
- KSB1015OTU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3 Full Pack
- Datasheet:
-
KSB1015OTU.pdf
- Description:
- TRANS PNP 60V 3A TO-220F-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,153
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Product details
Overview
KSB1015OTU from onsemi is a PNP epitaxial silicon power transistor designed for low-frequency power amplifier and switching applications, with −60 V VCEO, −3 A IC, 25 W PC at TC = 25°C, VCE(sat) = −0.5 V (typ) at IC = −3 A/IB = −0.3 A, and hFE = 60–200. It is used in audio output stages and DC-DC converter switches.
For engineers reviewing the KSB1015OTU datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-220 Fullpack package, PNP polarity, safe operating area (SOA) compliance up to 100°C case temperature, and Pb-free construction per JESD97.
Technical Context
This device operates as a medium-power PNP bipolar junction transistor with fixed gain classification (O/Y/T), optimized for linear amplification and saturated switching. Its low VCE(sat) and high IC rating support efficient current control in Class AB audio outputs and relay drivers.
The KSB1015OTU features a thermally robust TO-220 Fullpack (Case 221AT) package with electrically isolated collector tab, enabling direct heatsink mounting without insulator. Its fT = 9 MHz and Cob = 150 pF define bandwidth limits for low-frequency (<1 MHz) signal handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −60 V - Maximum sustainable collector-emitter voltage before breakdown in open-base condition |
| IC (DC) | −3 A - Continuous collector current capability under steady-state thermal conditions |
| PC (TC = 25°C) | 25 W - Maximum dissipated power with case held at 25°C; derates linearly above 25°C |
| VCE(sat) | −0.5 V (typ) at IC = −3 A/IB = −0.3 A - Low saturation voltage minimizes conduction loss in switching mode |
| hFE | 60–200 - DC current gain range across O/Y/T classifications; supports stable bias design across production lots |
| fT | 9 MHz - Current-gain bandwidth product limiting small-signal amplification to sub-10 MHz frequencies |
| Cob | 150 pF - Output capacitance at VCB = −10 V; impacts switching speed and high-frequency stability |
Pinout & Package
Package: TO-220 Fullpack (Case 221AT), 3-lead, Pb-free, with electrically isolated collector tab for direct heatsink mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Left) | Base | Current-controlled input terminal; requires external base resistor for biasing in amplifier/switch configurations |
| 2 (Center) | Collector | Main high-current output terminal; electrically isolated metal tab enables thermal coupling to heatsink without insulation |
| 3 (Right) | Emitter | Common reference terminal for PNP operation; connected to positive rail in typical switch layouts |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | −0.5 V typ at full rated current reduces power loss and thermal stress in switching applications |
| Pb-Free Construction | Complies with JESD97 and RoHS Directive 2011/65/EU for environmentally compliant manufacturing |
| High Safe Operating Area (SOA) | Supports pulsed IC up to −3 A with VCE ≤ −30 V at 100°C case temperature per Figure 5 |
| Thermally Optimized Package | TO-220 Fullpack's isolated collector tab allows direct mechanical and thermal attachment to heatsinks |
| Gain Classification Options | O/Y/T variants enable precise hFE binning (60–120 / 100–200) for consistent bias point design |
Applications
| Audio Power Amplifier | DC-DC Converter Switch |
|---|---|
Use Scenario: Used in complementary emitter-follower output stage of 10–20 W Class AB audio amplifiers. IC Role / Device Role / Timing Role: PNP power output transistor delivering peak current to speaker load with minimal crossover distortion. Use Value: Low VCE(sat) and high hFE ensure efficient power delivery and stable quiescent current setting. | Use Scenario: Serves as high-side switch in non-isolated buck converter for industrial 24 V DC loads. IC Role / Device Role / Timing Role: PNP switching transistor controlling energy transfer from input to output inductor during off-cycle. Use Value: −60 V VCEO and 25 W PC support reliable operation under transient overvoltage and thermal cycling. |
| Relay Driver | Linear Voltage Regulator Pass Element |
Use Scenario: Drives 12 V/500 mA electromagnetic relay coil in PLC I/O modules. IC Role / Device Role / Timing Role: Saturated PNP switch providing full coil current with fast turn-on/turn-off (tON = 0.4 µs). Use Value: Fast storage time (tSTG = 1.7 µs) prevents relay chatter during rapid control signal transitions. | Use Scenario: Functions as series pass element in adjustable linear regulator supplying ±15 V analog circuitry. IC Role / Device Role / Timing Role: Linear-mode PNP transistor regulating output voltage by dissipating excess input-output differential. Use Value: High SOA and 150°C TJ rating allow sustained operation under worst-case dropout and load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD127G | TO-252 (DPAK), lower PC = 15 W, VCEO = −100 V, hFE = 30–240 | Suitable for surface-mount designs with higher voltage margin but reduced thermal mass | Select when PCB space is constrained and board-level heatsinking is feasible |
| BD139 | TO-126, PC = 12.5 W, VCEO = −80 V, hFE = 40–250, no Pb-free option | Lower power rating and through-hole-only packaging limit use in high-reliability or high-volume automated assembly | Choose only for legacy repair or cost-sensitive low-power applications where Pb-free compliance is not required |
Compared with MJD127G and BD139, the KSB1015OTU offers superior thermal performance via TO-220 Fullpack isolation, guaranteed Pb-free compliance, and optimized VCE(sat) for high-current switching-making it preferred for new industrial amplifier and power supply designs requiring long-term supply stability and RoHS adherence.
Availability
KSB1015OTU is available at Aetrix Electronics and suitable for audio power amplifiers, DC-DC converters, relay drivers, and linear voltage regulators requiring stable component supply, RoHS-compliant packaging, and proven thermal reliability in TO-220 form factor.
Supply support for KSB1015OTU 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 innovation for automotive, industrial, cloud, and IoT applications.
The KSB1015OTU belongs to onsemi's discrete power transistor portfolio, engineered specifically for robust low-frequency power control in industrial and consumer audio systems where thermal stability and gain consistency are critical.
FAQ
What is the package type and mounting configuration of the KSB1015OTU?
The KSB1015OTU uses a TO-220 Fullpack (Case 221AT) package with three leads and an electrically isolated collector metal tab. This allows direct mechanical and thermal attachment to a heatsink without requiring insulating washers or pads, simplifying thermal design and improving reliability in high-power applications such as audio amplifiers and power supplies.
Does the KSB1015OTU meet RoHS requirements?
Yes, the KSB1015OTU is explicitly marked as a Pb-free device in its official datasheet (Publication Order Number KSB1015/D, Rev. 2, October 2024) and complies with the EU RoHS Directive 2011/65/EU. Its lead-free finish and halogen-free molding compound make it suitable for environmentally regulated industrial and consumer electronics production.
What is the maximum continuous collector current rating for the KSB1015OTU?
The KSB1015OTU has a maximum continuous collector current (IC) rating of −3 A at TC = 25°C. Derating is required above this case temperature per the linear power derating curve in Figure 6 of the datasheet, with zero power allowed at 150°C junction temperature. Actual usable current depends on heatsink efficiency and ambient conditions.
How does the hFE classification affect selection of the KSB1015OTU?
The KSB1015OTU is offered in O, Y, and T hFE classifications, specifying DC current gain ranges of 60–120, 100–200, and 120–200 respectively. This binning enables precise bias network design in linear amplifiers and predictable saturation behavior in switching circuits-ensuring consistent performance across production batches without manual gain matching.
Can the KSB1015OTU be used in complementary pair configurations with NPN transistors?
Yes, the KSB1015OTU is routinely paired with NPN counterparts such as the KSD1015 or MJE13009 in push-pull and complementary symmetry amplifier stages. Its matched VCE(sat), SOA, and thermal characteristics ensure balanced conduction and minimized crossover distortion-critical for high-fidelity audio output stages where both devices operate under identical thermal and electrical constraints.
KSB1015OTU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3 Full Pack
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 1V @ 300mA, 3A
- Current - Collector Cutoff (Max):
- 100µA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 60 @ 500mA, 5V
- Power - Max:
- 25 W
- Frequency - Transition:
- 9MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220F-3
KSB1015OTU FAQ
1.How can I place an order for KSB1015OTU through Aetrix?
Please submit a Request for Quotation (RFQ) for KSB1015OTU 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 KSB1015OTU reliable?
The price and inventory of KSB1015OTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSB1015OTU is usually 5 days.
3.What payment methods are accepted for KSB1015OTU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSB1015OTU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSB1015OTU?
KSB1015OTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSB1015OTU 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 KSB1015OTU?
For technical support, including KSB1015OTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSB1015OTU requirements.
6.How does Aetrix verify that KSB1015OTU is sourced from the original manufacturer or authorized distributors?
All KSB1015OTU 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 KSB1015OTU meets industry standards.
7.What is the process for return or replacement of KSB1015OTU?
All KSB1015OTU units undergo pre-shipment inspection (PSI). If there is an issue with KSB1015OTU, 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 KSB1015OTU part is unused and in its original packaging.
Return procedure for KSB1015OTU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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