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

onsemi KSB596OTU

Name: KSB596OTU
Brand: onsemi
SKU: KSB596OTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSB596OTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: KSB596OTU.pdf

Description:: TRANS PNP 80V 4A TO-220-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSB596OTU from onsemi is a PNP epitaxial silicon power transistor in TO-220-3LD package, rated for −80 V V_CEO, −4 A I_C, and 30 W P_C at T_C = 25°C; used as output stage switch or driver in linear power amplifiers and high-current DC control circuits.

For engineers reviewing the KSB596OTU datasheet, pinout, applications, or equivalent options, key selection factors include verified PNP polarity, −80 V breakdown rating, h_FE classification (R/O/Y), safe operating area (SOA) limits, and thermal derating curve compliance per onsemi Rev. 3 (May 2024).

Technical Context

This device operates as a medium-power PNP bipolar junction transistor with fixed three-terminal topology. Its design supports linear-mode amplification and saturated switching in complementary-pair configurations, especially with its matched NPN counterpart KSD526.

Electrical behavior is defined by DC current gain (h_FE = 40–240 depending on classification), low V_CE(sat) (−1.0 to −1.7 V @ I_C = −3 A), and f_T = 3 MHz - indicating suitability for audio-frequency and DC/low-speed switching applications, not RF or high-speed digital use.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−80 V: Maximum collector-emitter voltage before breakdown under open-base condition; defines safe DC bias headroom.
I_C (DC)	−4 A: Continuous collector current limit; sets maximum load drive capability in linear or saturated operation.
P_C (T_C = 25°C)	30 W: Thermal power dissipation limit at case temperature 25°C; requires heatsink for sustained operation above ~5 W.
h_FE	40–240: DC current gain range across R/O/Y classifications; determines base drive current scaling for given collector load.
V_CE(sat)	−1.0 to −1.7 V @ I_C = −3 A, I_B = −0.3 A: Saturation voltage defining conduction loss and heat generation in switching mode.
f_T	3 MHz: Current gain bandwidth product; confirms usable frequency range up to ~1–2 MHz in small-signal amplification.

Pinout & Package

Package: TO-220-3LD (Case 340AT), through-hole, single-ended heatsink-mountable, Pb-free compliant.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input node; requires external resistor-limited drive to achieve target I_C and avoid thermal runaway.
2	Collector	Main high-side current path; electrically connected to metal tab for heatsinking; must be isolated from PCB ground if mounted to shared heatsink.
3	Emitter	Common reference terminal for PNP operation; typically tied to system positive rail in high-side switch configurations.

Key Features

Feature	Design Value
Complementary pairing	Designed as direct PNP match to KSD526 NPN; enables balanced push-pull amplifier stages without gain skew.
High breakdown rating	−80 V V_CEO/V_CBO supports operation in 48 V industrial rails and legacy telecom supplies with margin.
Classified h_FE	R/O/Y binning ensures predictable base drive requirements across production lots for consistent circuit tuning.
Thermal robustness	150°C max junction temperature and documented power derating curve enable reliable operation with standard TO-220 heatsinks.

Applications

Audio Power Amplifier Output Stage	Industrial DC Motor Driver
Use Scenario: Final push-pull output pair in Class AB audio amplifier delivering up to 25 W into 8 Ω load. IC Role / Device Role / Timing Role: PNP half of complementary BJT output stage; handles negative half-cycle current sourcing. Use Value: −80 V rating and 30 W dissipation support rail voltages up to ±35 V with SOA-compliant operation at full output swing.	Use Scenario: High-side switch controlling direction and braking in 24–48 V brushed DC motor H-bridge. IC Role / Device Role / Timing Role: PNP-based high-side current source enabling bidirectional control when paired with N-channel low-side switches. Use Value: −4 A I_C and low V_CE(sat) minimize conduction loss during active braking and forward drive phases.
Linear Voltage Regulator Pass Element	Power Supply Foldback Protection
Use Scenario: Series pass transistor in adjustable linear regulator supplying 3–12 V at up to 3 A for analog subsystems. IC Role / Device Role / Timing Role: Adjustable current-sourcing element controlled by error amplifier feedback loop. Use Value: Stable h_FE and SOA allow continuous operation under worst-case dropout and load transient conditions.	Use Scenario: Current-limiting element in foldback protection circuit that reduces output current during short-circuit events. IC Role / Device Role / Timing Role: Self-biasing PNP transistor activated by sense-resistor voltage to throttle main pass device. Use Value: Predictable V_BE(on) (−1.0 to −1.5 V) and tight h_FE bins enable accurate, repeatable trip threshold calibration.

Audio Power Amplifier Output Stage

Industrial DC Motor Driver

Use Scenario: Final push-pull output pair in Class AB audio amplifier delivering up to 25 W into 8 Ω load.

IC Role / Device Role / Timing Role: PNP half of complementary BJT output stage; handles negative half-cycle current sourcing.

Use Value: −80 V rating and 30 W dissipation support rail voltages up to ±35 V with SOA-compliant operation at full output swing.

Use Scenario: High-side switch controlling direction and braking in 24–48 V brushed DC motor H-bridge.

IC Role / Device Role / Timing Role: PNP-based high-side current source enabling bidirectional control when paired with N-channel low-side switches.

Use Value: −4 A I_C and low V_CE(sat) minimize conduction loss during active braking and forward drive phases.

Linear Voltage Regulator Pass Element

Power Supply Foldback Protection

Use Scenario: Series pass transistor in adjustable linear regulator supplying 3–12 V at up to 3 A for analog subsystems.

IC Role / Device Role / Timing Role: Adjustable current-sourcing element controlled by error amplifier feedback loop.

Use Value: Stable h_FE and SOA allow continuous operation under worst-case dropout and load transient conditions.

Use Scenario: Current-limiting element in foldback protection circuit that reduces output current during short-circuit events.

IC Role / Device Role / Timing Role: Self-biasing PNP transistor activated by sense-resistor voltage to throttle main pass device.

Use Value: Predictable V_BE(on) (−1.0 to −1.5 V) and tight h_FE bins enable accurate, repeatable trip threshold calibration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD2955G	TO-263 package, −60 V V_CEO, −10 A I_C, higher P_D (75 W), no h_FE binning	Suitable for higher-current switching but lacks SOA curves and audio-grade linearity validation	Select when board space allows SMT mounting and higher peak current is required over precision gain control
KSA992FBU	TO-220F package, −120 V V_CEO, −3 A I_C, lower P_C (20 W), same h_FE classification system	Better voltage margin for 100 V bus designs but reduced thermal capacity and current drive	Select when higher breakdown is critical and 3 A load current suffices with tighter layout constraints

Compared with MJD2955G and KSA992FBU, the KSB596OTU offers optimal balance of voltage rating, current capability, thermal performance, and gain binning for discrete audio and industrial linear amplifier designs where TO-220 through-hole mounting and predictable h_FE are essential.

Availability

KSB596OTU is available at Aetrix Electronics and suitable for audio power amplifiers, industrial DC motor drivers, and linear voltage regulators requiring stable component supply, long-term manufacturability, and traceable Pb-free sourcing.

Supply support for KSB596OTU 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, with leadership in power management, analog, sensors, and logic devices.

The KSB596OTU belongs to onsemi's discrete bipolar power transistor family, engineered for robust linear and switching operation in industrial, automotive, and audio systems where reliability and parametric consistency are critical.

FAQ

What is the maximum continuous collector current rating for KSB596OTU?

The KSB596OTU is rated for −4 A DC collector current at T_C = 25°C. Derating is required above 25°C case temperature per Figure 7 in the datasheet; at 100°C case, maximum I_C drops to approximately −2.5 A. Operation beyond this limit risks thermal runaway and permanent damage. The KSB596OTU must be mounted on an appropriately sized heatsink to maintain safe junction temperature.

Is KSB596OTU pin-compatible with KSD526?

No, KSB596OTU is not pin-compatible with KSD526. While they are complementary PNP/NPN devices intended for matched pair use, KSB596OTU has Base–Collector–Emitter pinout (1–2–3), whereas KSD526 uses Emitter–Collector–Base (1–2–3) in the same TO-220-3LD package. Swapping them without board revision will cause circuit failure. The KSB596OTU pinout is confirmed in the Marking Diagram on page 1 of the datasheet.

Does KSB596OTU support audio-frequency amplification?

Yes, the KSB596OTU supports audio-frequency amplification with f_T = 3 MHz and validated SOA up to 100 kHz in linear operation. Its h_FE stability, low V_CE(sat), and thermal performance make it suitable for Class AB output stages. However, the KSB596OTU is not optimized for RF or wideband applications beyond 100 kHz due to limited bandwidth and lack of distortion specifications above audio range.

What does the "O" suffix in KSB596OTU indicate?

The "O" in KSB596OTU denotes the h_FE classification bin: O = h_FE 70–140 at V_CE = −5 V and I_C = −0.5 A. This bin provides mid-range current gain for predictable base drive sizing in amplifier and switching designs. The KSB596OTU marking also includes date code and lot traceability per onsemi's generic marking diagram (page 4).

Can KSB596OTU be used in surface-mount designs?

No, KSB596OTU is only available in TO-220-3LD (Case 340AT), a through-hole package. It is not offered in surface-mount variants such as DPAK or IPAK. For SMT alternatives, consider onsemi's MJD2955G (TO-263) or NSS12201LT1G (SOT-223), though neither matches the KSB596OTU's exact voltage/current/gain profile. Mounting KSB596OTU on a PCB requires plated-through holes and mechanical retention.

KSB596OTU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 4 A

Voltage - Collector Emitter Breakdown (Max):: 80 V

Vce Saturation (Max) @ Ib, Ic:: 1.7V @ 300mA, 3A

Current - Collector Cutoff (Max):: 70µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 70 @ 500mA, 5V

Power - Max:: 30 W

Frequency - Transition:: 3MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-3

KSB596OTU FAQ

1.How can I place an order for KSB596OTU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSB596OTU 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 KSB596OTU reliable?

The price and inventory of KSB596OTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSB596OTU is usually 5 days.

3.What payment methods are accepted for KSB596OTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSB596OTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSB596OTU?

KSB596OTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSB596OTU 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 KSB596OTU?

For technical support, including KSB596OTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSB596OTU requirements.

6.How does Aetrix verify that KSB596OTU is sourced from the original manufacturer or authorized distributors?

All KSB596OTU 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 KSB596OTU meets industry standards.

7.What is the process for return or replacement of KSB596OTU?

All KSB596OTU units undergo pre-shipment inspection (PSI). If there is an issue with KSB596OTU, 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 KSB596OTU part is unused and in its original packaging.

Return procedure for KSB596OTU:

1.Submit a request within 90 days.

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

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