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onsemi KSC1009YTA-ON
- Part No.:
- KSC1009YTA-ON
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
KSC1009YTA-ON.pdf
- Description:
- TRANS NPN 140V 0.7A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:16,000
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Product details
Overview
KSC1009YTA-ON from ON Semiconductor (formerly Fairchild) is an NPN epitaxial silicon transistor designed for high-voltage amplifier and switching applications, featuring VCBO = 160 V, IC = 700 mA, PC = 800 mW, VCEO = 140 V, and fT = 30–50 MHz. It is commonly used in horizontal deflection circuits, power supply regulators, and general-purpose linear amplification stages where robust voltage handling and moderate speed are required.
For engineers reviewing the KSC1009YTA-ON datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-92 package configuration, hFE classification (Y-grade: 120–240), saturation voltage performance (VCE(sat) ≤ 0.7 V at IC = 200 mA/IB = 20 mA), and thermal resistance (RθJA = 150 °C/W).
Technical Context
This device operates as a discrete NPN bipolar junction transistor with epitaxial base construction, optimized for stable DC gain and high breakdown voltage. Its design supports linear amplification and switching in medium-power analog and power-conversion circuits, with guaranteed BVCBO ≥ 160 V and BVCEO ≥ 140 V under specified test conditions.
The KSC1009YTA-ON exhibits defined saturation behavior (VCE(sat) and VBE(sat)) at IC = 200 mA/IB = 20 mA, and its small-signal frequency response is characterized by fT = 30–50 MHz at VCE = 10 V/IC = 50 mA. Output capacitance Cob = 8 pF at VCB = 10 V enables predictable high-frequency load interaction in tuned or broadband amplifier designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 160 V - Maximum reverse-biased collector-base voltage before breakdown; enables use in high-side switch or flyback snubber circuits. |
| VCEO | 140 V - Sustains collector-emitter voltage under open-base condition; suitable for line-voltage referenced amplifier stages. |
| IC | 700 mA - Continuous collector current rating; supports medium-current drive in relay drivers or regulator pass elements. |
| PC | 800 mW - Maximum power dissipation at TA = 25°C; requires thermal derating above ambient per RθJA = 150 °C/W. |
| hFE (Y-grade) | 120–240 - DC current gain range at VCE = 2 V/IC = 50 mA; ensures predictable bias stability in Class-A amplifiers. |
| fT | 30–50 MHz - Current-gain bandwidth product; supports audio-frequency amplification and low-MHz switching control loops. |
| Cob | 8 pF - Output capacitance at VCB = 10 V/f = 1 MHz; limits high-frequency gain roll-off and affects stability in RF-coupled stages. |
Pinout & Package
Package: TO-92, 3-lead molded plastic case with straight or bent leads; standard lead assignment for non-"-C" suffix parts: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current exit path; connects to ground or low-impedance return in common-emitter configurations. |
| 2 | Base | Control terminal; requires current-limited drive (e.g., via series resistor) to achieve target IC based on hFE. |
| 3 | Collector | High-voltage current input node; interfaces with load, supply rail, or transformer primary in switching topologies. |
Key Features
| Feature | Design Value |
|---|---|
| High VCBO rating | 160 V - Enables safe operation in circuits exposed to transient overvoltages up to rated limit without avalanche conduction. |
| Y-grade hFE bin | 120–240 - Tighter DC gain spread improves consistency in production amplifier biasing and reduces calibration overhead. |
| Low VCE(sat) | ≤ 0.7 V at IC = 200 mA/IB = 20 mA - Minimizes conduction loss in saturated-switch applications such as PWM-driven solenoid controls. |
| TO-92 mechanical compatibility | Standard 0.2" lead spacing - Allows drop-in replacement in legacy through-hole PCB layouts without footprint redesign. |
| Complementary pairing | Designed as NPN counterpart to KSA709 PNP - Facilitates push-pull output stage implementation with matched voltage ratings. |
Applications
| Horizontal Deflection Amplifier | Switch-Mode Power Supply Regulator |
|---|---|
Use Scenario: Drives flyback transformer primary in CRT monitor horizontal output stages requiring fast turn-off and high-voltage swing. IC Role / Device Role / Timing Role: High-voltage NPN switch operating in quasi-resonant or fixed-frequency hard-switched mode. Use Value: VCBO = 160 V and VCEO = 140 V withstand retrace-induced voltage spikes; fT ≥ 30 MHz ensures adequate switching fidelity. | Use Scenario: Acts as series pass transistor in adjustable linear regulator or error amplifier feedback loop of SMPS auxiliary supply. IC Role / Device Role / Timing Role: Linear amplifier controlling reference voltage or regulating output via emitter-follower configuration. Use Value: hFE(Y) = 120–240 provides stable closed-loop gain; low VBE(sat) = 0.86–1.00 V minimizes base drive burden. |
| Audio Preamp Stage | Relay/Solenoid Driver |
Use Scenario: Low-noise voltage amplifier in microphone preamplifier or tone-control circuit within consumer audio equipment. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier biased for Class-A operation. Use Value: Cob = 8 pF limits high-frequency roll-off; fT = 30–50 MHz preserves full audio bandwidth up to 20 kHz. | Use Scenario: Direct-drive interface between microcontroller GPIO and 12–24 V DC relay coil or solenoid actuator. IC Role / Device Role / Timing Role: Saturated switch providing galvanic isolation and current gain between logic-level and load-side circuits. Use Value: IC = 700 mA handles typical relay coils (≤ 500 mA); VCE(sat) ≤ 0.7 V keeps power loss < 350 mW at full load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPSA42 | Higher VCBO = 300 V, lower IC = 500 mA, same TO-92 package | Better suited for higher-voltage AC-line referenced circuits; less current headroom for heavy loads | Select when >160 V breakdown margin is critical and load current stays below 500 mA |
| KSC1845FTA | Same manufacturer family, VCBO = 160 V, IC = 800 mA, hFE(Y) = 120–240, TO-92 | Near-identical specification set with minor improvements in power dissipation and current rating | Preferred upgrade path within same footprint; verify layout clearance for 800 mW vs. 800 mW rating |
Compared with MPSA42 and KSC1845FTA, the KSC1009YTA-ON offers balanced high-voltage capability and medium-current drive in a legacy-compatible TO-92 form factor, making it optimal for cost-sensitive, volume-produced horizontal deflection and industrial control circuits where exact 700 mA/800 mW operation is specified.
Availability
KSC1009YTA-ON is available at Aetrix Electronics and suitable for horizontal deflection amplifiers, switch-mode power supply regulators, and relay/solenoid drivers requiring stable component supply across long-lifecycle industrial and consumer electronics programs.
Supply support for KSC1009YTA-ON 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, intelligent power and sensing solutions for automotive, industrial, communications, computing, and consumer electronics.
The KSC1009YTA-ON belongs to ON Semiconductor's legacy bipolar transistor portfolio, originally developed by Fairchild for high-reliability analog and power-switching applications in CRT-based displays and linear power systems.
FAQ
What is the pin configuration of the KSC1009YTA-ON?
The KSC1009YTA-ON uses a standard TO-92 package with non-"-C" suffix pinout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector. This configuration is confirmed in the official Fairchild/ON Semiconductor datasheet Rev. 1.3 and matches industry-standard TO-92 orientation for NPN transistors. Always verify physical orientation using the flat side and lead-down view before PCB layout or assembly.
Does the KSC1009YTA-ON have a complementary PNP part?
Yes, the KSC1009YTA-ON is explicitly designed as the NPN complement to the KSA709 PNP transistor. Both share matching voltage ratings (KSA709: VCEO = –140 V, VCBO = –160 V), similar current capability, and TO-92 packaging, enabling direct use in push-pull, differential pair, or complementary symmetry amplifier stages without redesign.
What is the hFE classification for the "Y" suffix in KSC1009YTA-ON?
The "Y" suffix in KSC1009YTA-ON denotes the hFE bin classification of 120–240 at VCE = 2 V and IC = 50 mA, as specified in the official datasheet. This tighter gain range improves predictability in bias-critical applications like linear amplifiers and ensures consistent performance across production lots without individual gain screening.
Can the KSC1009YTA-ON be used in switching applications?
Yes, the KSC1009YTA-ON is qualified for switching use due to its specified VCE(sat) ≤ 0.7 V at IC = 200 mA/IB = 20 mA and fT = 30–50 MHz. It supports reliable saturation and turn-off in PWM-driven relays, solenoids, and horizontal deflection circuits-provided thermal limits (PC = 800 mW, RθJA = 150 °C/W) and safe operating area (SOA) constraints are observed in the final design.
Is the KSC1009YTA-ON RoHS compliant and halogen-free?
Yes, the KSC1009YTA-ON is RoHS compliant and halogen-free, consistent with ON Semiconductor's corporate compliance policy and the product's status as a mature commercial-grade transistor. Full material declarations and compliance documentation are available through ON Semiconductor's official product page and authorized distributor portals.
KSC1009YTA-ON Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 700 mA
- Voltage - Collector Emitter Breakdown (Max):
- 140 V
- Vce Saturation (Max) @ Ib, Ic:
- 700mV @ 20mA, 200mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 120 @ 50mA, 2V
- Power - Max:
- 800 mW
- Frequency - Transition:
- 50MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
KSC1009YTA-ON FAQ
1.How can I place an order for KSC1009YTA-ON through Aetrix?
Please submit a Request for Quotation (RFQ) for KSC1009YTA-ON 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 KSC1009YTA-ON reliable?
The price and inventory of KSC1009YTA-ON are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC1009YTA-ON is usually 5 days.
3.What payment methods are accepted for KSC1009YTA-ON?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC1009YTA-ON transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSC1009YTA-ON?
KSC1009YTA-ON orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSC1009YTA-ON 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 KSC1009YTA-ON?
For technical support, including KSC1009YTA-ON datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC1009YTA-ON requirements.
6.How does Aetrix verify that KSC1009YTA-ON is sourced from the original manufacturer or authorized distributors?
All KSC1009YTA-ON 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 KSC1009YTA-ON meets industry standards.
7.What is the process for return or replacement of KSC1009YTA-ON?
All KSC1009YTA-ON units undergo pre-shipment inspection (PSI). If there is an issue with KSC1009YTA-ON, 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 KSC1009YTA-ON part is unused and in its original packaging.
Return procedure for KSC1009YTA-ON:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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