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

onsemi KSB596O

Name: KSB596O
Brand: onsemi
SKU: KSB596O
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSB596O

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: KSB596O.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSB596 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; it delivers h_FE of 40–240 (class Y), V_CE(sat) ≤ −1.7 V at −3 A/−0.3 A, and f_T = 3 MHz - used in linear and switching power amplifier stages.

For engineers reviewing the KSB596 datasheet, pinout, applications, or equivalent options, key selection criteria include safe operating area (SOA) compliance at elevated case temperatures, DC current gain stability across collector current range, saturation voltage under high-current drive, and thermal derating behavior above 25°C.

Technical Context

The KSB596 operates as a medium-power PNP bipolar junction transistor with fixed emitter-base and collector-base breakdown limits (−5 V and −80 V respectively), enabling use in complementary push-pull output stages alongside its NPN counterpart KSD526. Its SOA curve supports pulsed operation up to 10 ms at −10 A with V_CE = −40 V.

Thermal design relies on direct case-to-heatsink mounting via the TO-220-3LD metal tab (Collector-connected), with linear power derating from 30 W at 25°C to zero at 150°C case temperature. Base drive must sustain ≥ −0.3 A to ensure full saturation at −3 A collector load.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−80 V: Maximum allowable collector-emitter voltage before avalanche breakdown in common-emitter configuration.
I_C (DC)	−4 A: Continuous collector current limit defining maximum linear or switching load handling capability.
P_C @ T_C=25°C	30 W: Steady-state power dissipation limit when case temperature is maintained at 25°C.
h_FE (Class Y)	120–240: Confirmed DC current gain range at V_CE = −5 V, I_C = −0.5 A, critical for base drive sizing.
V_CE(sat)	≤ −1.7 V @ I_C = −3 A, I_B = −0.3 A: Saturation voltage directly impacts conduction loss and thermal rise in switching applications.
f_T	3 MHz: Unity-gain bandwidth limiting small-signal amplification bandwidth and switching speed.

Pinout & Package

Package: TO-220-3LD (Case 340AT), with metal tab electrically connected to Collector and intended for heatsink mounting. Leads are straight, through-hole compatible, and lead-free per J-STD-609.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input terminal; requires ≥ −0.3 A drive for full saturation at −3 A collector load.
2	Collector	Main high-current output terminal; internally bonded to metal tab for thermal and electrical connection to heatsink.
3	Emitter	Common reference terminal in common-emitter configuration; polarity defines PNP operation and biasing direction.

Key Features

Feature	Design Value
Complementary Pairing	Designed as direct PNP complement to KSD526 NPN transistor, enabling matched push-pull amplifier designs.
High Breakdown Voltage	−80 V V_CEO and V_CBO support operation in 48 V and 60 V rail systems without derating.
Controlled h_FE Spread	Three h_FE classes (R/O/Y) allow binning for consistent gain matching in production amplifier modules.
Thermal Robustness	150°C max junction temperature and defined derating curve enable reliable operation in industrial ambient conditions.

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 power switch in complementary emitter-follower output pair, sourcing current to load during positive half-cycle. Use Value: Low V_CE(sat) minimizes crossover distortion and thermal stress; h_FE consistency ensures matched gain with KSD526 for symmetric clipping behavior.	Use Scenario: H-bridge low-side or totem-pole driver in 24–48 V brushed DC motor control. IC Role / Device Role / Timing Role: High-current PNP switch controlling motor winding current direction and magnitude in discrete driver circuits. Use Value: −80 V V_CEO provides margin against inductive kickback; SOA rating supports 10 ms pulse overload during motor stall events.
Linear Voltage Regulator Pass Element	Industrial Power Supply Output Stage
Use Scenario: Series pass transistor in adjustable linear regulators powering analog sensor subsystems. IC Role / Device Role / Timing Role: Current-controlled series regulator element dissipating excess voltage as heat to maintain stable output. Use Value: 30 W P_C at 25°C enables ≥2 A output at 15 V dropout; thermal derating curve allows accurate heatsink sizing for continuous operation.	Use Scenario: Final output stage in programmable bench power supplies requiring ±0.1% load regulation. IC Role / Device Role / Timing Role: Precision-controlled PNP pass device in multi-stage feedback-regulated output path. Use Value: Tight h_FE binning (Class Y) reduces base current variation across units, improving unit-to-unit regulation consistency.

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 power switch in complementary emitter-follower output pair, sourcing current to load during positive half-cycle.

Use Value: Low V_CE(sat) minimizes crossover distortion and thermal stress; h_FE consistency ensures matched gain with KSD526 for symmetric clipping behavior.

Use Scenario: H-bridge low-side or totem-pole driver in 24–48 V brushed DC motor control.

IC Role / Device Role / Timing Role: High-current PNP switch controlling motor winding current direction and magnitude in discrete driver circuits.

Use Value: −80 V V_CEO provides margin against inductive kickback; SOA rating supports 10 ms pulse overload during motor stall events.

Linear Voltage Regulator Pass Element

Industrial Power Supply Output Stage

Use Scenario: Series pass transistor in adjustable linear regulators powering analog sensor subsystems.

IC Role / Device Role / Timing Role: Current-controlled series regulator element dissipating excess voltage as heat to maintain stable output.

Use Value: 30 W P_C at 25°C enables ≥2 A output at 15 V dropout; thermal derating curve allows accurate heatsink sizing for continuous operation.

Use Scenario: Final output stage in programmable bench power supplies requiring ±0.1% load regulation.

IC Role / Device Role / Timing Role: Precision-controlled PNP pass device in multi-stage feedback-regulated output path.

Use Value: Tight h_FE binning (Class Y) reduces base current variation across units, improving unit-to-unit regulation consistency.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD44H11T4G	TO-252 (DPAK), −80 V V_CEO, −8 A I_C, higher P_D = 35 W, but lower h_FE min = 30.	Suitable for surface-mount designs; not pin-compatible due to different footprint and leadform.	Select when SMT assembly and higher current headroom are required; verify SOA and thermal interface compatibility.
BD711	TO-126, −80 V V_CEO, −3 A I_C, P_C = 25 W, h_FE = 25–200, no Pb-free marking.	Limited to lower-power linear applications; lacks extended SOA pulse ratings.	Choose only for cost-sensitive legacy through-hole designs where 3 A and 25 W suffice and RoHS compliance is secondary.

Compared with MJD44H11T4G and BD711, the KSB596 offers superior thermal coupling via TO-220 metal tab, verified SOA performance up to 10 ms pulses, and RoHS-compliant Pb-free construction - making it preferred for thermally demanding, high-reliability through-hole amplifier and regulator outputs.

Availability

KSB596 is available at Aetrix Electronics and suitable for audio power amplifiers, DC motor drivers, linear voltage regulators, and industrial power supply output stages requiring stable component supply and long-term manufacturability.

Supply support for KSB596 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 discrete devices.

The KSB596 belongs to onsemi's high-voltage PNP transistor product line, engineered specifically for robust linear and switching power amplification in industrial, audio, and power conversion systems.

FAQ

What is the maximum continuous collector current rating for KSB596?

The KSB596 has a maximum continuous collector current (I_C) rating of −4 A at T_C = 25°C. This value decreases with rising case temperature per the published derating curve - at 100°C case temperature, the usable I_C drops to approximately −2.5 A. Operation beyond this limit risks thermal runaway and permanent damage to the KSB596.

Is KSB596 pin-compatible with KSD526?

No, the KSB596 is not pin-compatible with KSD526. While they are complementary PNP/NPN devices intended for paired use in amplifier circuits, the KSB596 uses TO-220-3LD (pinout: 1=Base, 2=Collector, 3=Emitter), whereas KSD526 uses TO-220-3 (pinout: 1=Emitter, 2=Base, 3=Collector). Physical layout and PCB footprint differ, requiring separate land patterns for each device.

Does KSB596 meet RoHS requirements?

Yes, the KSB596 is a Pb-free device compliant with RoHS Directive 2011/65/EU. The "YTU" suffix in ordering code KSB596YTU explicitly denotes lead-free packaging, and onsemi confirms this in the official datasheet revision dated May 2024. No exemptions apply; all homogeneous materials comply with maximum concentration values.

What is the typical DC current gain (h_FE) of KSB596 at I_C = −3 A?

At I_C = −3 A and V_CE = −5 V, the KSB596 exhibits h_FE ≥ 15 (minimum) per datasheet Table "ELECTRICAL CHARACTERISTICS". For Class Y devices, typical h_FE is ~180 at I_C = −0.5 A, but gain compresses at higher currents - confirming ≥15 ensures reliable base drive design for the KSB596 in high-current saturated switching.

Can KSB596 be used in switching power supplies?

Yes, the KSB596 can be used in low-frequency switching power supplies (e.g., <100 kHz) where its 3 MHz f_T and SOA support safe turn-on/turn-off transitions. However, it is not optimized for high-frequency SMPS due to relatively high V_CE(sat) and storage time limitations. For such applications, the KSB596 is best suited in auxiliary supplies, gate drivers, or post-regulation stages rather than primary PWM switches.

KSB596O Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Bulk

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

KSB596O FAQ

1.How can I place an order for KSB596O through Aetrix?

Please submit a Request for Quotation (RFQ) for KSB596O 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 KSB596O reliable?

The price and inventory of KSB596O are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSB596O is usually 5 days.

3.What payment methods are accepted for KSB596O?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSB596O transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSB596O?

KSB596O orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSB596O 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 KSB596O?

For technical support, including KSB596O datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSB596O requirements.

6.How does Aetrix verify that KSB596O is sourced from the original manufacturer or authorized distributors?

All KSB596O 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 KSB596O meets industry standards.

7.What is the process for return or replacement of KSB596O?

All KSB596O units undergo pre-shipment inspection (PSI). If there is an issue with KSB596O, 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 KSB596O part is unused and in its original packaging.

Return procedure for KSB596O:

1.Submit a request within 90 days.

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

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