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

onsemi KSB596YTU

Name: KSB596YTU
Brand: onsemi
SKU: KSB596YTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSB596YTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: KSB596YTU.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSB596YTU 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, with h_FE of 40–240 (class Y), used in linear power amplifier stages requiring high-current switching and low-saturation operation.

For engineers reviewing the KSB596YTU datasheet, pinout, applications, or equivalent options, key selection considerations include its complementary pairing with KSD526, safe operating area under pulse/DC conditions, thermal derating above 25°C, and Pb-free compliance per J-STD-609.

Technical Context

This device operates as a medium-power PNP bipolar junction transistor optimized for linear amplification and switching in audio and industrial power stages. Its design emphasizes high DC current gain at moderate collector currents (h_FE ≥ 120 at I_C = −0.5 A) and low saturation voltage (V_CE(sat) ≤ −1.7 V at I_C = −3 A, I_B = −0.3 A).

The KSB596YTU features a robust SOA profile supporting pulsed operation up to 10 ms at −10 A, with thermal resistance R_θJC enabling stable 30 W dissipation at case temperature ≤25°C. It is not intended for RF or digital logic switching due to f_T = 3 MHz and C_cb = 130 pF.

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 rail headroom.
I_C (DC)	−4 A: Continuous collector current rating; sets maximum linear output capability without thermal runaway.
P_C (T_C=25°C)	30 W: Maximum steady-state power dissipation at heatsink interface; requires thermal design for higher ambient.
h_FE (Class Y)	120–240: Confirmed DC current gain range at V_CE = −5 V, I_C = −0.5 A; enables predictable base drive sizing.
V_CE(sat)	−1.0 to −1.7 V: Measured at I_C = −3 A, I_B = −0.3 A; determines conduction loss and heat generation in saturated switch mode.
f_T	3 MHz: Current gain bandwidth product at V_CE = −5 V, I_C = −0.5 A; limits usable frequency in small-signal amplification.
C_cb	130 pF: Collector-base capacitance at V_CB = −10 V, 1 MHz; impacts high-frequency stability and Miller effect in amplifier designs.

Pinout & Package

Package: TO-220-3LD (Case 340AT), through-hole, single-ended heatsink-mountable, Pb-free, with integral metal tab electrically connected to collector.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal; accepts negative bias current to turn on PNP conduction; requires current-limiting resistor in series.
2	Collector	Main high-current output terminal; electrically tied to metal tab; must be isolated from heatsink unless common-collector configuration is used.
3	Emitter	Current source terminal; typically connected to positive supply rail in PNP common-emitter amplifier configurations.

Key Features

Feature	Design Value
Complementary Pairing	Explicitly designed as PNP complement to NPN KSD526; enables matched push-pull stage implementation with consistent gain and SOA.
Thermal Derating Curve	Linear power reduction from 30 W at 25°C to 0 W at 150°C case temperature; enables precise heatsink sizing for continuous operation.
High h_FE Class Y	Guaranteed 120–240 h_FE at I_C = −0.5 A; reduces required base drive current and driver-stage complexity.
Pb-Free Construction	Meets J-STD-609 Category 3 requirements; eliminates lead content without performance trade-off in reliability or thermal behavior.

Applications

Audio Power Amplifier	DC Motor Driver Stage
Use Scenario: Output stage in Class AB audio amplifiers delivering 10–30 W into 4–8 Ω loads. IC Role / Device Role / Timing Role: PNP output transistor in complementary emitter-follower or common-emitter configuration. Use Value: Low V_CE(sat) minimizes crossover distortion and improves efficiency; high h_FE simplifies driver design.	Use Scenario: High-side switch in brushed DC motor H-bridge or half-bridge driver circuits. IC Role / Device Role / Timing Role: PNP high-side power switch controlling motor voltage rail connection. Use Value: −80 V V_CEO supports 24–48 V industrial motor systems; TO-220 tab allows direct heatsinking.
Regulated Power Supply Pass Element	Industrial Linear Power Controller
Use Scenario: Series pass transistor in adjustable linear regulators supplying up to 3 A load current. IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output via feedback loop. Use Value: 30 W P_C and SOA support sustained operation at 2–3 A with proper heatsinking and foldback protection.	Use Scenario: Precision current source or voltage-controlled heater driver in PLC analog output modules. IC Role / Device Role / Timing Role: Linear-mode power control element modulating load current based on analog input. Use Value: Stable h_FE across temperature ensures repeatable current scaling; low leakage (I_CBO ≤ −70 nA) maintains accuracy at light loads.

Audio Power Amplifier

DC Motor Driver Stage

Use Scenario: Output stage in Class AB audio amplifiers delivering 10–30 W into 4–8 Ω loads.

IC Role / Device Role / Timing Role: PNP output transistor in complementary emitter-follower or common-emitter configuration.

Use Value: Low V_CE(sat) minimizes crossover distortion and improves efficiency; high h_FE simplifies driver design.

Use Scenario: High-side switch in brushed DC motor H-bridge or half-bridge driver circuits.

IC Role / Device Role / Timing Role: PNP high-side power switch controlling motor voltage rail connection.

Use Value: −80 V V_CEO supports 24–48 V industrial motor systems; TO-220 tab allows direct heatsinking.

Regulated Power Supply Pass Element

Industrial Linear Power Controller

Use Scenario: Series pass transistor in adjustable linear regulators supplying up to 3 A load current.

IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output via feedback loop.

Use Value: 30 W P_C and SOA support sustained operation at 2–3 A with proper heatsinking and foldback protection.

Use Scenario: Precision current source or voltage-controlled heater driver in PLC analog output modules.

IC Role / Device Role / Timing Role: Linear-mode power control element modulating load current based on analog input.

Use Value: Stable h_FE across temperature ensures repeatable current scaling; low leakage (I_CBO ≤ −70 nA) maintains accuracy at light loads.

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, lower P_C = 15 W, h_FE = 20–70 at I_C = −4 A, V_CE(sat) = −1.8 V max	Suitable for surface-mount designs with reduced thermal budget; not recommended for >2 A continuous linear use.	Select when board space constraints favor SMT and peak power <15 W.
BD711	TO-126 package, P_C = 12.5 W, V_CEO = −100 V, h_FE = 25–250, no Pb-free marking	Higher voltage margin but lower power handling; limited to <1.5 A continuous; legacy process with longer lead time.	Select only if −100 V rating is mandatory and thermal load is light.

Compared with MJD2955G and BD711, the KSB596YTU delivers superior thermal capability (30 W vs ≤15 W), higher guaranteed h_FE in Class Y, and Pb-free compliance-making it preferred for through-hole, medium-power linear amplifier and regulator applications where heatsink integration and gain consistency are critical.

Availability

KSB596YTU is available at Aetrix Electronics and suitable for audio power amplifiers, industrial motor drivers, and linear regulated power supplies requiring stable component supply, long-lifecycle availability, and Pb-free compliance.

Supply support for KSB596YTU 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 specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The KSB596YTU belongs to onsemi's discrete bipolar power transistor family, engineered for high-reliability linear amplification and switching in industrial and audio applications where thermal stability and gain consistency are essential.

FAQ

What is the pin configuration of the KSB596YTU?

The KSB596YTU uses a TO-220-3LD package with pin 1 = Base, pin 2 = Collector (electrically connected to metal tab), and pin 3 = Emitter. This configuration is confirmed in the official onsemi datasheet (KSB596/D, Rev. 3, May 2024) and applies strictly to the KSB596YTU variant. The metal tab must be electrically isolated from the heatsink unless the circuit design intentionally references the collector to chassis ground.

Is the KSB596YTU RoHS-compliant and Pb-free?

Yes, the KSB596YTU is explicitly marked as Pb-free in the onsemi datasheet and complies with J-STD-609 Category 3. The "YTU" suffix denotes the Pb-free TO-220-3LD variant, and the device carries no lead content in solderable terminations or internal construction. This makes the KSB596YTU suitable for modern electronics manufacturing with full RoHS and REACH compliance requirements.

What is the guaranteed h_FE range for the KSB596YTU?

The KSB596YTU is classified as "Y" grade, guaranteeing h_FE between 120 and 240 when measured at V_CE = −5 V and I_C = −0.5 A, per the onsemi datasheet's h_FE Classification table. This range is tighter and higher than "R" (40–80) or "O" (70–140) grades, ensuring predictable base drive requirements in precision amplifier and regulator designs using the KSB596YTU.

Can the KSB596YTU replace the KSB596 in existing designs?

Yes-the KSB596YTU is a direct Pb-free replacement for the legacy KSB596, sharing identical electrical specifications, pinout, package dimensions, and thermal characteristics. The "YTU" suffix indicates only the Pb-free process revision; all absolute maximum ratings, electrical characteristics, and SOA curves remain unchanged from the original KSB596, making the KSB596YTU drop-in compatible without layout or schematic modification.

What is the maximum safe continuous collector current for the KSB596YTU?

The KSB596YTU is rated for −4 A DC collector current (I_C) at T_C = 25°C, but actual safe continuous current depends on heatsinking and ambient conditions. At T_C = 75°C, derated power drops to ~20 W, limiting practical I_C to approximately −2.5 A for V_CE ≈ −5 V. Always verify junction temperature using R_θJC and R_θCA values from the KSB596YTU datasheet to ensure T_J ≤ 150°C in final design.

KSB596YTU 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:: 120 @ 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

KSB596YTU FAQ

1.How can I place an order for KSB596YTU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSB596YTU 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 KSB596YTU reliable?

The price and inventory of KSB596YTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSB596YTU is usually 5 days.

3.What payment methods are accepted for KSB596YTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSB596YTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSB596YTU?

KSB596YTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSB596YTU 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 KSB596YTU?

For technical support, including KSB596YTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSB596YTU requirements.

6.How does Aetrix verify that KSB596YTU is sourced from the original manufacturer or authorized distributors?

All KSB596YTU 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 KSB596YTU meets industry standards.

7.What is the process for return or replacement of KSB596YTU?

All KSB596YTU units undergo pre-shipment inspection (PSI). If there is an issue with KSB596YTU, 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 KSB596YTU part is unused and in its original packaging.

Return procedure for KSB596YTU:

1.Submit a request within 90 days.

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

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