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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi KSA1370EBU

Name: KSA1370EBU
Brand: onsemi
SKU: KSA1370EBU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSA1370EBU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 Long Body

Datasheet:: KSA1370EBU.pdf

Description:: TRANS PNP 200V 0.1A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSA1370EBU from Fairchild Semiconductor is a PNP epitaxial silicon transistor rated for -200 V collector-emitter and collector-base voltage, -100 mA DC collector current, 1.0 W power dissipation, and 150 MHz current gain bandwidth product; it serves in CRT display video output stages requiring high-voltage switching and low reverse transfer capacitance.

For engineers reviewing the KSA1370EBU datasheet, pinout, applications, or equivalent options, key selection criteria include its -200 V breakdown ratings, Cre = 1.7 pF, TO-92L package with emitter-collector-base pin order, and suitability for high-voltage analog switching in legacy display systems.

Technical Context

The KSA1370EBU operates as a high-voltage PNP bipolar junction transistor optimized for video output amplification in CRT displays. Its design emphasizes high BV_CEO and BV_CBO (-200 V), low Cre (1.7 pF), and stable h_FE (100–320 at V_CE = -10 V, I_C = -10 mA).

It delivers V_CE(sat) = -0.6 V at I_C = -20 mA / I_B = -2 mA and V_BE(on) = -1.0 V under same conditions, enabling efficient saturation switching in linear video driver circuits with minimal thermal drift up to 150°C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
VCBO / VCEO	-200 V - Supports high-voltage CRT anode drive and flyback timing without breakdown
IC (DC)	-100 mA - Sufficient for video output stage bias and signal swing in monochrome/color CRT drivers
fT	150 MHz - Enables stable small-signal amplification across video bandwidth (up to ~5 MHz fundamental + harmonics)
Cre	1.7 pF - Minimizes feedback distortion and improves stability in high-gain video amplifier configurations
PC	1.0 W - Allows continuous operation at elevated ambient temperatures with standard TO-92L heatsinking
hFE	100–320 - Provides predictable DC biasing and gain control in emitter-follower or common-emitter video output topologies

Pinout & Package

Package: TO-92L, through-hole, 3-lead plastic package with 2.54 mm lead pitch; standardized for manual insertion and wave soldering in legacy display PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current source terminal; connects to CRT grid or cathode bias network for active pull-up operation
2	Collector	High-voltage output node; interfaces directly with CRT anode supply or deflection yoke return path
3	Base	Control input; accepts negative-going video drive signals to modulate electron beam intensity

Key Features

Feature	Design Value
High breakdown voltage	Rated -200 V V_CEO/V_CBO enables direct interface with CRT EHT supplies without external snubbing
Low reverse transfer capacitance	Cre = 1.7 pF reduces Miller effect, preserving video edge fidelity and minimizing oscillation risk
Stable DC current gain	h_FE = 100–320 over -10 mA operating point ensures consistent biasing across production lots
TO-92L mechanical compatibility	Standardized footprint allows drop-in replacement of legacy PNP video transistors in service and manufacturing

Applications

CRT Monochrome Display Driver	CRT Color Video Output Stage
Use Scenario: Driving the cathode/grid of monochrome CRTs in oscilloscopes and industrial monitors. IC Role / Device Role / Timing Role: PNP video switch providing active pull-up and beam intensity modulation. Use Value: -200 V rating handles CRT anode swing; low Cre preserves rise/fall times in 1–5 MHz video bandwidth.	Use Scenario: Final-stage amplification in RGB video output circuits of color CRT TVs and terminals. IC Role / Device Role / Timing Role: Linear PNP emitter-follower delivering low-impedance video drive to CRT cathodes. Use Value: 150 MHz f_T supports full NTSC/PAL bandwidth; V_CE(sat) = -0.6 V minimizes black-level shift.
Flyback Transformer Drive	Legacy Test Equipment Video Amplifier
Use Scenario: Switching control of flyback transformer primary in CRT horizontal deflection circuits. IC Role / Device Role / Timing Role: High-voltage PNP switch turning on/off horizontal retrace current pulses. Use Value: 1.0 W power rating sustains pulsed operation; TJ = 150°C rating accommodates intermittent thermal load.	Use Scenario: Signal conditioning and output buffering in vintage waveform generators and vector displays. IC Role / Device Role / Timing Role: Low-distortion linear amplifier for precision analog video synthesis. Use Value: Stable h_FE and low C_ob (2.6 pF) maintain amplitude flatness and phase linearity up to 10 MHz.

CRT Monochrome Display Driver

CRT Color Video Output Stage

Use Scenario: Driving the cathode/grid of monochrome CRTs in oscilloscopes and industrial monitors.

IC Role / Device Role / Timing Role: PNP video switch providing active pull-up and beam intensity modulation.

Use Value: -200 V rating handles CRT anode swing; low Cre preserves rise/fall times in 1–5 MHz video bandwidth.

Use Scenario: Final-stage amplification in RGB video output circuits of color CRT TVs and terminals.

IC Role / Device Role / Timing Role: Linear PNP emitter-follower delivering low-impedance video drive to CRT cathodes.

Use Value: 150 MHz f_T supports full NTSC/PAL bandwidth; V_CE(sat) = -0.6 V minimizes black-level shift.

Flyback Transformer Drive

Legacy Test Equipment Video Amplifier

Use Scenario: Switching control of flyback transformer primary in CRT horizontal deflection circuits.

IC Role / Device Role / Timing Role: High-voltage PNP switch turning on/off horizontal retrace current pulses.

Use Value: 1.0 W power rating sustains pulsed operation; TJ = 150°C rating accommodates intermittent thermal load.

Use Scenario: Signal conditioning and output buffering in vintage waveform generators and vector displays.

IC Role / Device Role / Timing Role: Low-distortion linear amplifier for precision analog video synthesis.

Use Value: Stable h_FE and low C_ob (2.6 pF) maintain amplitude flatness and phase linearity up to 10 MHz.

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
KSA992FBU	Same manufacturer, TO-92L, but lower V_CEO = -160 V and higher h_FE (200–600); f_T = 120 MHz	Suitable for lower-voltage CRTs or non-EHT-coupled video stages where gain consistency is prioritized over breakdown margin	Select when system V_CE stress remains below -150 V and tighter h_FE spread is required
MJD2955G	TO-220 package, -70 V V_CEO, -10 A I_C, higher power (115 W), no Cre spec provided	Designed for power switching, not video linearity; unsuitable for high-frequency analog video due to package parasitics and bandwidth limitation	Use only in DC/low-frequency high-current PNP roles; not a functional substitute for KSA1370EBU in CRT video paths

Compared with KSA1370EBU, KSA992FBU trades 40 V breakdown margin for higher gain consistency, while MJD2955G offers massive current capacity in a thermally robust package but lacks the video-optimized capacitance and bandwidth needed for CRT signal integrity.

Availability

KSA1370EBU is available at Aetrix Electronics and suitable for CRT display repair, legacy test equipment maintenance, and industrial monitor refurbishment requiring stable component supply and long-term obsolescence mitigation.

Supply support for KSA1370EBU 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The KSA1370EBU belongs to Fairchild's legacy high-voltage bipolar transistor family designed specifically for CRT video output, flyback timing, and analog switching in broadcast, instrumentation, and industrial display systems.

FAQ

What is the maximum collector-emitter voltage rating for the KSA1370EBU?

The KSA1370EBU has a maximum collector-emitter voltage rating (V_CEO) of -200 V at T_a = 25°C. This rating is confirmed in the Absolute Maximum Ratings table and verified under test condition I_C = -1 mA, I_B = 0. Exceeding this voltage risks avalanche breakdown and permanent device failure. The KSA1370EBU must be operated within this limit in all CRT video output and flyback applications.

Is the KSA1370EBU pin-compatible with other TO-92L PNP transistors?

The KSA1370EBU uses standard TO-92L pinout: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. While mechanically compatible with other TO-92L devices, electrical compatibility depends on voltage, gain, and capacitance specs. For example, KSA992FBU shares the same pinout and package but differs in V_CEO and h_FE; always verify circuit stress margins before substitution of the KSA1370EBU.

What is the typical reverse transfer capacitance (Cre) of the KSA1370EBU and why does it matter?

The KSA1370EBU has a typical reverse transfer capacitance (Cre) of 1.7 pF at V_CB = -30 V and f = 1 MHz. This low value minimizes Miller feedback in high-gain video amplifier stages, preserving signal edge integrity and preventing instability or oscillation-critical for maintaining luminance fidelity in CRT monochrome and color displays using the KSA1370EBU.

Can the KSA1370EBU be used in modern LCD or OLED display circuits?

The KSA1370EBU is not recommended for modern LCD or OLED display circuits. Its design targets high-voltage analog switching in CRT systems, with parameters like -200 V breakdown and video-optimized Cre/Cob that are irrelevant to low-voltage digital display interfaces. Modern designs use integrated drivers or MOSFETs; substituting the KSA1370EBU would introduce unnecessary cost, size, and compatibility issues.

What is the junction temperature limit and thermal derating behavior of the KSA1370EBU?

The KSA1370EBU has a maximum junction temperature (T_J) of 150°C and a storage temperature range of -55°C to +150°C. Its safe operating area (SOA) curve shows linear derating above 25°C case temperature, with power dissipation dropping to zero at ~150°C. For reliable operation in CRT video output stages, ensure heatsinking or airflow maintains T_C ≤ 80°C when the KSA1370EBU dissipates near its 1.0 W rating.

KSA1370EBU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 Long Body

Packaging:: Bulk

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

KSA1370EBU FAQ

1.How can I place an order for KSA1370EBU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSA1370EBU 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 KSA1370EBU reliable?

The price and inventory of KSA1370EBU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSA1370EBU is usually 5 days.

3.What payment methods are accepted for KSA1370EBU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSA1370EBU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSA1370EBU?

KSA1370EBU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSA1370EBU 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 KSA1370EBU?

For technical support, including KSA1370EBU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSA1370EBU requirements.

6.How does Aetrix verify that KSA1370EBU is sourced from the original manufacturer or authorized distributors?

All KSA1370EBU 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 KSA1370EBU meets industry standards.

7.What is the process for return or replacement of KSA1370EBU?

All KSA1370EBU units undergo pre-shipment inspection (PSI). If there is an issue with KSA1370EBU, 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 KSA1370EBU part is unused and in its original packaging.

Return procedure for KSA1370EBU:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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