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onsemi KSA1370FTA
- Part No.:
- KSA1370FTA
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
KSA1370FTA.pdf
- Description:
- TRANS PNP 200V 0.1A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,798
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Product details
Overview
KSA1370FTA from ON Semiconductor (formerly Fairchild) is a PNP epitaxial silicon transistor designed for high-voltage video output and CRT display applications. It features -200 V collector-emitter and collector-base breakdown voltages, 150 MHz current gain bandwidth product, and low reverse transfer capacitance of 1.7 pF at VCB = -30 V, enabling stable high-frequency amplification in deflection and driver stages.
For engineers reviewing the KSA1370FTA datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-92L package, -100 mA DC collector current rating, -0.6 V VCE(sat) at IC = -20 mA/IB = -2 mA, and suitability for linear video amplifier and horizontal deflection circuits requiring high-voltage PNP switching.
Technical Context
The KSA1370FTA operates as a medium-power, high-voltage PNP bipolar junction transistor optimized for analog video signal handling. Its design emphasizes low capacitive coupling (Cre = 1.7 pF, Cob = 2.6 pF) and high fT (150 MHz), supporting wideband amplification without phase distortion in CRT horizontal output stages.
It delivers stable DC current gain (hFE = 100–320 at VCE = -10 V, IC = -10 mA) with tight saturation characteristics (VCE(sat) ≤ -0.6 V, VBE(on) ≈ -1.0 V), enabling efficient switching and linear operation under pulsed and continuous loads up to 1.0 W at 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO / VCEO | -200 V - Supports high-voltage CRT anode drive and horizontal deflection supply rails without breakdown. |
| IC (DC) | -100 mA - Sustains continuous collector current for video output stage biasing and driver loads. |
| fT | 150 MHz - Enables faithful amplification of composite video harmonics up to ~5 MHz with margin. |
| Cre | 1.7 pF - Minimizes Miller feedback, preserving gain stability and reducing oscillation risk in high-gain stages. |
| VCE(sat) | -0.6 V @ IC = -20 mA, IB = -2 mA - Ensures low conduction loss and thermal efficiency in saturated switching mode. |
| PC | 1.0 W @ Ta = 25°C - Defines maximum power dissipation before thermal derating; usable up to TC = 150°C per SOA curve. |
Pinout & Package
Package: TO-92L - 3-lead through-hole plastic package with 2.54 mm lead pitch, 13.5 mm body length, and 3.9 mm width; optimized for vertical mounting and heat dissipation in compact CRT chassis layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current source terminal; connected to positive rail in PNP common-emitter video amplifier configurations. |
| 2 | Collector | Output node; interfaces directly with CRT deflection yoke or video output transformer primary winding. |
| 3 | Base | Control input; driven by low-impedance horizontal sync or video pre-driver stage for precise turn-on/turn-off timing. |
Key Features
| Feature | Design Value |
|---|---|
| High breakdown voltage | Rated -200 V VCBO and VCEO - Eliminates need for external snubbers in 150–180 V horizontal output circuits. |
| Low Cre capacitance | 1.7 pF reverse transfer capacitance - Reduces unwanted coupling between collector and base, critical for stable high-gain video amplifiers. |
| High fT bandwidth | 150 MHz gain-bandwidth product - Maintains flat frequency response across full NTSC/PAL video spectrum (0–5.5 MHz). |
| TO-92L mechanical profile | 13.5 mm × 3.9 mm × 3.9 mm body with 2.54 mm lead spacing - Fits standard CRT TV service replacement footprints and supports manual rework. |
Applications
| CRT Horizontal Deflection | Video Output Amplifier |
|---|---|
Use Scenario: Driving flyback transformer primary in analog television horizontal scan circuits with 15.734 kHz sync frequency and >100 V peak swing. IC Role / Device Role / Timing Role: High-voltage PNP switch providing fast turn-off and low saturation loss during retrace interval. Use Value: -200 V VCEO withstands flyback voltage spikes; -0.6 V VCE(sat) minimizes power loss and thermal stress at 100 mA average current. | Use Scenario: Final-stage amplification of composite video signal prior to CRT cathode input, requiring wide bandwidth and low distortion. IC Role / Device Role / Timing Role: Linear Class-A/B PNP emitter-follower delivering low-output-impedance drive to 75 Ω coaxial line. Use Value: 150 MHz fT ensures >6 dB gain margin at 5.5 MHz; 1.7 pF Cre suppresses high-frequency instability and ghosting artifacts. |
| Monitor Video Driver | Legacy Display Power Switch |
Use Scenario: RGB video signal buffering in VGA-compatible analog monitors operating at 31.5 kHz horizontal rate. IC Role / Device Role / Timing Role: DC-coupled PNP driver stage translating DAC output to CRT grid/cathode with minimal offset drift. Use Value: hFE = 100–320 enables precise bias control; -5 V VEBO rating accommodates negative blanking pulse injection without base-emitter junction damage. | Use Scenario: Standby power control in CRT-based industrial HMIs, switching +12 V auxiliary rail under microcontroller command. IC Role / Device Role / Timing Role: Medium-current PNP load switch activated via base resistor network from logic-level GPIO. Use Value: -100 mA IC rating supports >80 mA load current with 20% margin; TO-92L footprint allows direct drop-in replacement in legacy PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP high-voltage transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| KSA992FTA | Lower VCEO (-120 V), higher hFE (200–600), same TO-92L package and pinout. | Suitable for lower-voltage video drivers but not flyback switching above 120 V. | Select KSA992FTA only when circuit VCE stress remains below -120 V and higher DC gain is required. |
| MJD2955G | Higher PC (1.5 W), TO-220 package, -70 V VCEO, -10 A IC rating - power PNP complement to MJE2955. | Used in high-current linear regulators or motor drivers, not video-frequency amplification. | Choose MJD2955G only for high-power DC switching where bandwidth and capacitance are secondary concerns. |
Compared with KSA1370FTA, KSA992FTA trades voltage headroom for higher gain in low-stress video stages, while MJD2955G offers robust power handling in TO-220 but lacks the 150 MHz fT and 1.7 pF Cre needed for CRT video fidelity.
Availability
KSA1370FTA is available at Aetrix Electronics and suitable for CRT display repair, analog video equipment maintenance, and legacy industrial HMI upgrades requiring stable component supply and long-term obsolescence mitigation.
Supply support for KSA1370FTA 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, high-performance silicon solutions for automotive, industrial, cloud computing, and consumer electronics.
The KSA1370FTA belongs to Fairchild's legacy high-voltage bipolar transistor family, engineered specifically for analog video signal integrity and CRT deflection reliability in broadcast and consumer display systems.
FAQ
What is the maximum safe collector-emitter voltage for KSA1370FTA?
The KSA1370FTA has a rated VCEO of -200 V at Ta = 25°C. This absolute maximum rating must not be exceeded under any operating condition, including transient flyback spikes. Derating is required above 25°C ambient per the SOA curve in the datasheet, with junction temperature limited to 150°C.
Does KSA1370FTA have a documented pinout compatible with standard TO-92L footprints?
Yes, KSA1370FTA uses the standard TO-92L pin configuration: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. Its mechanical dimensions (13.50 ±0.40 mm length, 3.90 ±0.20 mm width) match JEDEC TO-92L specifications, ensuring compatibility with existing through-hole PCB layouts and socket adapters used for CRT service.
Can KSA1370FTA replace KSA1220 in CRT horizontal output stages?
No - KSA1220 has VCEO = -120 V and fT = 80 MHz, making it unsuitable as a direct replacement for KSA1370FTA in circuits demanding -200 V breakdown or >100 MHz bandwidth. Substituting KSA1220 risks premature failure under flyback voltage stress and may degrade video sharpness due to reduced gain-bandwidth.
What is the typical DC current gain (hFE) range for KSA1370FTA at standard test conditions?
The KSA1370FTA exhibits hFE = 100–320 when measured at VCE = -10 V and IC = -10 mA, per the datasheet's Electrical Characteristics table. This wide gain spread reflects process variation and requires circuit designs to accommodate both extremes - e.g., using emitter degeneration or feedback to stabilize bias points in video amplifier stages.
Is KSA1370FTA suitable for use in modern LCD or LED display backlight drivers?
No - KSA1370FTA is optimized for analog video signal paths and high-voltage switching in CRT systems. Modern LCD/LED backlight drivers require PWM-capable MOSFETs or dedicated LED driver ICs with integrated current regulation, thermal protection, and high-side switching - capabilities outside the scope of this bipolar PNP transistor's design and specification.
KSA1370FTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 200 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 2mA, 20mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 10mA, 10V
- Power - Max:
- 1 W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
KSA1370FTA FAQ
1.How can I place an order for KSA1370FTA through Aetrix?
Please submit a Request for Quotation (RFQ) for KSA1370FTA 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 KSA1370FTA reliable?
The price and inventory of KSA1370FTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSA1370FTA is usually 5 days.
3.What payment methods are accepted for KSA1370FTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSA1370FTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSA1370FTA?
KSA1370FTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSA1370FTA 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 KSA1370FTA?
For technical support, including KSA1370FTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSA1370FTA requirements.
6.How does Aetrix verify that KSA1370FTA is sourced from the original manufacturer or authorized distributors?
All KSA1370FTA 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 KSA1370FTA meets industry standards.
7.What is the process for return or replacement of KSA1370FTA?
All KSA1370FTA units undergo pre-shipment inspection (PSI). If there is an issue with KSA1370FTA, 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 KSA1370FTA part is unused and in its original packaging.
Return procedure for KSA1370FTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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