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

onsemi KSB1097OTU

Name: KSB1097OTU
Brand: onsemi
SKU: KSB1097OTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSB1097OTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3 Full Pack

Datasheet:: KSB1097OTU.pdf

Description:: TRANS PNP 60V 7A TO-220F-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSB1097OTU from ON Semiconductor (formerly Fairchild) is a PNP epitaxial silicon power transistor designed for low-frequency power amplification and industrial low-speed switching. It features -60 V V_CEO, -7 A DC collector current, 30 W collector dissipation at T_C=25°C, -1.5 V V_BE(sat) at I_C=-5 A/I_B=-0.5 A, and TO-220F package with insulated tab.

For engineers reviewing the KSB1097OTU datasheet, pinout, applications, or equivalent options, key selection criteria include safe operating area robustness, DC current gain classification (R/O/Y), V_CE(sat) performance under high-current switching, thermal derating behavior, and complementary pairing with NPN KSD1588 in push-pull amplifier stages.

Technical Context

This PNP bipolar junction transistor operates in linear amplification and saturated switching modes. Its h_FE ranges from 40–200 depending on classification grade (R/O/Y), with guaranteed minimum h_FE1=40 at I_C=-3 A and h_FE2=20 at I_C=-5 A. The device supports pulsed collector current up to -15 A with strict duty cycle limits.

Thermal design relies on case-mounted heatsinking: 30 W dissipation is rated only at T_C=25°C, derating linearly to zero at 175°C case temperature. The insulated TO-220F package enables direct mounting without insulating washers while maintaining electrical isolation between collector and heatsink.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-60 V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration
I_C (DC)	-7 A - Continuous collector current capability defining steady-state power handling
P_C (T_C=25°C)	30 W - Maximum power dissipation achievable with adequate heatsinking at case temperature 25°C
V_CE(sat)	-0.5 V @ I_C=-5 A/I_B=-0.5 A - Low saturation voltage enabling efficient switching with minimal conduction loss
h_FE1	40–200 - DC current gain range across R/O/Y classifications, critical for base drive sizing in amplifier/switch designs
T_J max	150°C - Absolute maximum junction temperature limiting thermal design margin and reliability lifetime
V_BE(sat)	-1.5 V @ I_C=-5 A/I_B=-0.5 A - Base-emitter voltage required to achieve full saturation, determining base driver voltage headroom

Pinout & Package

Package: TO-220F (insulated tab, vertical mounting, 3-lead through-hole). Tab is electrically isolated from collector and serves as mechanical mounting surface only.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control electrode	Receives base current to bias transistor into active or saturated region; requires current-limiting resistor in most applications
2 (Collector)	High-current output terminal	Connected to load or supply rail; electrically tied to metal tab in standard TO-220 but isolated in TO-220F variant
3 (Emitter)	Reference terminal	Typically connected to ground or negative rail; carries full emitter current (I_C + I_B)

Key Features

Feature	Design Value
Insulated TO-220F package	Enables direct heatsink mounting without mica insulator or thermal pad, reducing thermal resistance and assembly cost
Complementary pairing	Designed as PNP counterpart to KSD1588 NPN transistor, facilitating matched push-pull amplifier and H-bridge output stages
High pulse current rating	Supports -15 A pulsed collector current (PW ≤ 300 µs, duty ≤ 10%), suitable for intermittent high-load switching
Low V_CE(sat)	-0.5 V at -5 A ensures < 2.5 W conduction loss per device, improving efficiency in Class-AB audio and motor drive outputs

Applications

Audio Power Amplifier Output Stage	Industrial Relay Driver
Use Scenario: Final output stage of Class-AB audio amplifier delivering up to 30 W into 8 Ω loads. IC Role / Device Role / Timing Role: PNP power transistor providing negative half-cycle current sourcing in complementary symmetry topology. Use Value: Low V_CE(sat) minimizes crossover distortion and heat generation; h_FE classification allows precise matching with KSD1588 for balanced gain.	Use Scenario: Driving 24 VDC industrial control relays requiring >5 A inrush current handling. IC Role / Device Role / Timing Role: High-current saturated switch controlling relay coil energization/de-energization. Use Value: -15 A pulse rating accommodates relay coil inrush; TO-220F insulation eliminates need for isolating hardware during panel-mount installation.
DC Motor Direction Control	Linear Voltage Regulator Pass Element
Use Scenario: Low-speed bidirectional DC motor control in factory automation systems using discrete H-bridge. IC Role / Device Role / Timing Role: Upper-leg PNP switch in H-bridge configuration enabling reverse polarity motor drive. Use Value: -60 V V_CEO provides margin against inductive kickback; 30 W T_C-rated dissipation supports continuous 1 A motor current with heatsink.	Use Scenario: Series pass element in adjustable linear regulator supplying stable 5–12 V at up to 3 A for embedded controllers. IC Role / Device Role / Timing Role: Linear-mode current amplifier regulating output by dissipating excess input-output voltage difference. Use Value: High h_FE (up to 200) reduces required base drive current; 150°C T_J rating supports operation under sustained thermal stress.

Audio Power Amplifier Output Stage

Industrial Relay Driver

Use Scenario: Final output stage of Class-AB audio amplifier delivering up to 30 W into 8 Ω loads.

IC Role / Device Role / Timing Role: PNP power transistor providing negative half-cycle current sourcing in complementary symmetry topology.

Use Value: Low V_CE(sat) minimizes crossover distortion and heat generation; h_FE classification allows precise matching with KSD1588 for balanced gain.

Use Scenario: Driving 24 VDC industrial control relays requiring >5 A inrush current handling.

IC Role / Device Role / Timing Role: High-current saturated switch controlling relay coil energization/de-energization.

Use Value: -15 A pulse rating accommodates relay coil inrush; TO-220F insulation eliminates need for isolating hardware during panel-mount installation.

DC Motor Direction Control

Linear Voltage Regulator Pass Element

Use Scenario: Low-speed bidirectional DC motor control in factory automation systems using discrete H-bridge.

IC Role / Device Role / Timing Role: Upper-leg PNP switch in H-bridge configuration enabling reverse polarity motor drive.

Use Value: -60 V V_CEO provides margin against inductive kickback; 30 W T_C-rated dissipation supports continuous 1 A motor current with heatsink.

Use Scenario: Series pass element in adjustable linear regulator supplying stable 5–12 V at up to 3 A for embedded controllers.

IC Role / Device Role / Timing Role: Linear-mode current amplifier regulating output by dissipating excess input-output voltage difference.

Use Value: High h_FE (up to 200) reduces required base drive current; 150°C T_J rating supports operation under sustained thermal stress.

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	V_CEO = -100 V, I_C = -8 A, TO-252 (DPAK) surface-mount package, no insulated tab	Suitable for PCB space-constrained designs but requires thermal pad layout and lacks TO-220F's mechanical rigidity	Select when automated assembly and board-level thermal management are prioritized over field-serviceable heatsink mounting
BD139	V_CEO = -80 V, I_C = -1.5 A, TO-126 package, lower power (12.5 W), no insulation	Limited to medium-power applications; insufficient for >3 A continuous loads or high-pulse scenarios	Choose only for cost-sensitive, low-current linear amplifiers where KSB1097OTU's 30 W rating is unnecessary

Compared with MJD127G and BD139, the KSB1097OTU uniquely combines TO-220F insulation, 30 W T_C-rated dissipation, and -7 A DC current in a through-hole format-making it optimal for serviceable, high-reliability industrial power stages where mechanical robustness and thermal accessibility matter.

Availability

KSB1097OTU is available at Aetrix Electronics and suitable for audio power amplifiers, industrial relay drivers, DC motor direction control circuits, and linear voltage regulator pass elements requiring stable component supply and long-term industrial availability.

Supply support for KSB1097OTU 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 (acquired Fairchild Semiconductor in 2016) is a global semiconductor supplier focused on energy-efficient electronics for automotive, industrial, cloud computing, and IoT applications.

The KSB1097OTU belongs to Fairchild's legacy discrete power transistor family, engineered specifically for ruggedized industrial amplification and switching where reliability under thermal stress and mechanical durability are primary design requirements.

FAQ

What is the pin configuration of the KSB1097OTU?

The KSB1097OTU uses a standard TO-220F pinout: Pin 1 is Base, Pin 2 is Collector, and Pin 3 is Emitter. The metal tab is electrically insulated from the collector, enabling direct heatsink mounting without additional isolation hardware. This configuration is confirmed in the original Fairchild datasheet Rev. A (February 2000) and maintained across ON Semiconductor's product documentation for KSB1097OTU.

Is the KSB1097OTU suitable for audio amplifier output stages?

Yes, the KSB1097OTU is explicitly designated as a "Low Frequency Power Amplifier" device in its datasheet and optimized for Class-AB output stages. Its -0.5 V V_CE(sat) at -5 A, h_FE classification system (R/O/Y), and complementary pairing with KSD1588 make KSB1097OTU well-suited for high-fidelity, thermally stable audio power amplification up to 30 W per channel.

What is the maximum pulsed collector current rating for KSB1097OTU?

The KSB1097OTU supports a pulsed collector current (I_CP) of -15 A under conditions of pulse width ≤ 300 µs and duty cycle ≤ 10%. This rating is specified in the Absolute Maximum Ratings table and validated by Safe Operating Area (SOA) curves in the datasheet, making KSB1097OTU appropriate for short-duration overload or inrush current handling.

Does the KSB1097OTU have an insulated tab, and why does it matter?

Yes, the "OTU" suffix denotes the TO-220F package with electrically insulated tab. Unlike standard TO-220, this insulation eliminates the need for mica washers or silicone pads when mounting to grounded heatsinks-reducing thermal resistance, assembly time, and failure risk from insulator degradation. This feature is integral to KSB1097OTU's industrial reliability profile.

How does the hFE classification (R/O/Y) affect KSB1097OTU selection?

The KSB1097OTU is manufactured in three h_FE bins: R (40–80), O (60–120), and Y (100–200). Designers select based on required base drive strength and gain matching-e.g., Y-grade enables lower base current in linear regulators, while R-grade offers tighter tolerance for predictable saturation in switching applications. All grades share identical absolute maximum ratings and thermal specs in KSB1097OTU.

KSB1097OTU 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):: 7 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 500mA, 5A

Current - Collector Cutoff (Max):: 10µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 3A, 1V

Power - Max:: 2 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220F-3

KSB1097OTU FAQ

1.How can I place an order for KSB1097OTU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSB1097OTU 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 KSB1097OTU reliable?

The price and inventory of KSB1097OTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSB1097OTU is usually 5 days.

3.What payment methods are accepted for KSB1097OTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSB1097OTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSB1097OTU?

KSB1097OTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSB1097OTU 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 KSB1097OTU?

For technical support, including KSB1097OTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSB1097OTU requirements.

6.How does Aetrix verify that KSB1097OTU is sourced from the original manufacturer or authorized distributors?

All KSB1097OTU 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 KSB1097OTU meets industry standards.

7.What is the process for return or replacement of KSB1097OTU?

All KSB1097OTU units undergo pre-shipment inspection (PSI). If there is an issue with KSB1097OTU, 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 KSB1097OTU part is unused and in its original packaging.

Return procedure for KSB1097OTU:

1.Submit a request within 90 days.

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

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