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onsemi KSP05BU
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- Part No.:
- KSP05BU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
KSP05BU.pdf
- Description:
- TRANS NPN 60V 0.5A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,161
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Product details
Overview
KSP05BU from ON Semiconductor is a general-purpose NPN epitaxial silicon transistor in TO-92 package, rated for 60 V collector-emitter voltage, 500 mA collector current, and 625 mW power dissipation. It delivers DC current gain (hFE) ≥50 at IC = 10 mA and VCE = 1 V, with fT = 100 MHz, and serves as a signal amplifier or switch in low-voltage consumer and industrial control circuits.
For engineers reviewing the KSP05BU datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, terminal mapping, real-world use cases, and validated alternative parts - all specific to the KSP05BU variant and its documented TO-92 configuration.
Technical Context
The KSP05BU operates as a discrete bipolar junction transistor with fixed NPN polarity, defined by absolute maximum ratings including VCBO = 60 V, VCEO = 60 V, VEBO = 4 V, and TJ(max) = 150°C. Its electrical behavior is characterized under standard test conditions: hFE measured at VCE = 1 V, IC = 10 mA or 100 mA; VCE(sat) = 0.25 V at IC = 100 mA/IB = 10 mA; and fT = 100 MHz at VCE = 2 V, IC = 10 mA, f = 100 MHz.
It is explicitly designated as the complement to KSP55/KSP56 PNP transistors and shares identical TO-92 3L packaging with KSP05TA and KSP06 variants. The device is not intended for automotive, aerospace, or life-support applications per Fairchild/ON Semiconductor's authorized use policy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum allowable collector-emitter voltage before breakdown; defines safe operating range in switching or linear amplification. |
| IC(max) | 500 mA - Continuous collector current limit; determines load-driving capability in relay drivers or LED switches. |
| PC(max) | 625 mW - Maximum power dissipation at TA = 25°C; sets thermal derating requirements for PCB layout and heatsinking. |
| hFE | ≥50 - Minimum DC current gain at VCE = 1 V, IC = 10 mA; ensures reliable base-drive efficiency in low-power amplifiers. |
| fT | 100 MHz - Current gain–bandwidth product; supports audio-frequency amplification and moderate-speed digital switching. |
| VCE(sat) | 0.25 V - Collector-emitter saturation voltage at IC = 100 mA/IB = 10 mA; minimizes conduction loss in saturated-switch operation. |
| VEBO | 4 V - Maximum emitter-base reverse voltage; constrains base bias network design to avoid junction damage. |
Pinout & Package
Package: TO-92 3L (JEDEC-compliant molded plastic case with straight leads, bulk packing). Pin identification follows standard TO-92 orientation: lead 1 = Emitter, lead 2 = Base, lead 3 = Collector, viewed from flat side with leads down and flat face toward observer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current exit path for majority carriers | Connected to ground or low-side reference; must handle full load current in common-emitter configurations. |
| 2 (Base) | Control electrode for minority carrier injection | Requires current-limited drive (e.g., series resistor) to achieve specified hFE and avoid thermal runaway. |
| 3 (Collector) | Current entry path for majority carriers | Connected to supply rail or load; voltage rating limits maximum swing in switching applications. |
Key Features
| Feature | Design Value |
|---|---|
| Complement to KSP55/KSP56 | Enables matched NPN/PNP pair usage in push-pull output stages or differential amplifiers without cross-manufacturer sourcing. |
| TO-92 3L packaging | Supports manual assembly and through-hole prototyping; compatible with standard wave-soldering profiles and automated insertion equipment. |
| hFE ≥50 at IC = 100 mA | Ensures stable gain under higher-current biasing, reducing base drive requirements in medium-power switching circuits. |
| VCE(sat) = 0.25 V | Limits power loss during saturation, improving efficiency in battery-powered or thermally constrained designs. |
| fT = 100 MHz | Permits use in audio preamplifiers and clock buffer stages up to ~10 MHz fundamental frequency with margin. |
Applications
| Audio Signal Amplifier | Low-Voltage Relay Driver |
|---|---|
|
Use Scenario: Amplifying line-level audio signals (≤1 Vpp) in portable headphone amplifiers or microphone preamps. IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter configuration with emitter degeneration. Use Value: hFE ≥50 and fT = 100 MHz enable clean gain up to 20 kHz with minimal distortion; TO-92 footprint simplifies compact PCB layout. |
Use Scenario: Driving 12 V, 100 mA coil relays from microcontroller GPIO pins. IC Role / Device Role / Timing Role: Saturated switch controlling relay coil current via base-driven on/off state. Use Value: VCE(sat) = 0.25 V minimizes heat generation; IC(max) = 500 mA accommodates relay inrush current without derating. |
| LED Current Switch | Level-Shifting Interface |
|
Use Scenario: Switching 20 mA indicator LEDs in industrial HMI panels powered from 5 V logic rails. IC Role / Device Role / Timing Role: Low-side current sink switch controlled by TTL/CMOS logic levels. Use Value: VEBO = 4 V allows direct connection to 3.3 V or 5 V logic; PC = 625 mW supports continuous LED duty cycle without heatsink. |
Use Scenario: Translating 3.3 V logic outputs to 5 V-compatible inputs in mixed-voltage MCU systems. IC Role / Device Role / Timing Role: Active pull-up level shifter using common-emitter topology with open-collector output. Use Value: VCEO = 60 V provides ample headroom; hFE ≥50 ensures fast edge response for data rates ≤1 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC547B | Lower VCEO (45 V), same TO-92 package, hFE = 200–450 (higher gain band), fT ≈ 300 MHz | Better suited for high-gain, low-noise amplification; less suitable for 60 V switching due to lower breakdown rating | Select BC547B when gain consistency and noise performance outweigh voltage margin needs. |
| MPSA18 | Higher VCEO (50 V), TO-92, hFE = 100–300, fT ≈ 150 MHz, PC = 625 mW | Offers improved bandwidth and gain over KSP05BU but still falls short of 60 V rating required in some legacy designs | Choose MPSA18 where faster switching or tighter hFE distribution is prioritized and 50 V suffices. |
Compared with BC547B and MPSA18, the KSP05BU provides the highest VCEO (60 V) among these TO-92 NPN transistors, making it uniquely suitable for 48 V system interfaces or legacy designs requiring strict voltage margin - while maintaining compatibility with standard through-hole assembly processes.
Availability
KSP05BU is available at Aetrix Electronics and suitable for low-voltage relay drivers, LED current switches, audio preamplifiers, and level-shifting interfaces requiring stable component supply across prototyping, pilot production, and long-life industrial programs.
Supply support for KSP05BU 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 manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The KSP05BU belongs to ON Semiconductor's legacy general-purpose bipolar transistor product line, originally developed by Fairchild Semiconductor to serve cost-sensitive, high-volume applications in consumer electronics and industrial controls where reliability, manufacturability, and TO-92 compatibility are essential.
FAQ
What is the pin configuration of the KSP05BU?
The KSP05BU uses a standard TO-92 3L package with pinout: Lead 1 = Emitter, Lead 2 = Base, Lead 3 = Collector, identified when viewing the flat side of the package with leads pointing downward. This configuration is confirmed in the official Fairchild/ON Semiconductor datasheet Rev. 1.4 and matches JEDEC TO-92 mechanical drawings.
Is the KSP05BU RoHS compliant?
Yes, the KSP05BU is RoHS compliant per ON Semiconductor's product compliance documentation. As a legacy Fairchild part integrated into ON Semiconductor's portfolio, it meets EU Directive 2011/65/EU requirements for restricted substances, with lead-free terminations and halogen-free molding compound consistent with industry standards for TO-92 devices.
Can the KSP05BU replace the KSP06BU in a circuit?
No - the KSP05BU is not a drop-in replacement for the KSP06BU. While both share TO-92 packaging and similar gain/power specs, the KSP05BU has VCEO = 60 V and VCBO = 60 V, whereas the KSP06BU is rated for 80 V. Substituting KSP05BU in a design relying on 80 V breakdown may result in premature failure under transient or margin conditions.
What is the maximum junction temperature for the KSP05BU?
The KSP05BU has a maximum junction temperature (TJ) of 150°C, as specified in the Absolute Maximum Ratings table of the official datasheet. This value governs thermal design limits - sustained operation above this temperature risks permanent degradation of hFE, leakage current, and long-term reliability of the KSP05BU.
Does the KSP05BU have a documented PSpice model?
Yes, an official PSpice model for the KSP05BU is available through ON Semiconductor's website under the "Design Resources" section for the KSP05/KSP06 family. The model includes accurate DC, AC, and transient behavioral parameters derived from characterization data, enabling simulation of switching speed, saturation behavior, and thermal effects in the KSP05BU.
KSP05BU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 250mV @ 10mA, 100mA
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 50 @ 100mA, 1V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
KSP05BU FAQ
1.How can I place an order for KSP05BU through Aetrix?
Please submit a Request for Quotation (RFQ) for KSP05BU 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 KSP05BU reliable?
The price and inventory of KSP05BU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSP05BU is usually 5 days.
3.What payment methods are accepted for KSP05BU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSP05BU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSP05BU?
KSP05BU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSP05BU 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 KSP05BU?
For technical support, including KSP05BU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSP05BU requirements.
6.How does Aetrix verify that KSP05BU is sourced from the original manufacturer or authorized distributors?
All KSP05BU 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 KSP05BU meets industry standards.
7.What is the process for return or replacement of KSP05BU?
All KSP05BU units undergo pre-shipment inspection (PSI). If there is an issue with KSP05BU, 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 KSP05BU part is unused and in its original packaging.
Return procedure for KSP05BU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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