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

onsemi KSD882OS

Name: KSD882OS
Brand: onsemi
SKU: KSD882OS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSD882OS

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-225AA, TO-126-3

Datasheet:: KSD882OS.pdf

Description:: TRANS NPN 30V 3A TO-126-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSD882OS from onsemi is an NPN epitaxial silicon power transistor in TO-126-3LD package, rated for 30 V V_CEO, 3 A DC collector current, and 10 W total dissipation at T_C = 25°C; designed for audio frequency power amplifier stages in consumer and industrial audio systems.

For engineers reviewing the KSD882OS datasheet, pinout, applications, or equivalent options, key selection criteria include its 30 V BV_CEO, 3 A I_C, h_FE range of 160–320 at 1 A, V_CE(sat) ≤ 0.5 V at 2 A/0.2 A, and TO-126 mechanical compatibility with heat-sink mounting.

Technical Context

This discrete NPN bipolar junction transistor operates in linear amplification mode with f_T = 90 MHz, enabling stable gain up to mid-audio frequencies. Its low-speed switching capability and complementary pairing with KSB772 support push-pull output stages.

Thermal derating begins at T_C > 25°C, with safe operating area (SOA) limited by both dissipation and secondary breakdown. Output capacitance C_ob = 45 pF at 10 V supports predictable high-frequency roll-off in amplifier feedback networks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum continuous collector-emitter voltage before breakdown; sets rail voltage limit in Class-A/B audio outputs.
I_C (DC)	3 A - Sustained collector current handling; supports ≥5 W RMS audio output into 8 Ω with proper heatsinking.
h_FE @ 1 A	160–320 - DC current gain range for bias stability in emitter-follower or common-emitter driver stages.
V_CE(sat)	≤0.5 V @ 2 A/0.2 A - Low saturation voltage minimizes conduction loss and thermal stress in switching or saturated-mode operation.
f_T	90 MHz - Current-gain bandwidth product; ensures adequate gain margin up to ~20 kHz with phase stability in feedback loops.
C_ob	45 pF @ 10 V - Collector-base junction capacitance; defines high-frequency roll-off and Miller effect in amplifier configurations.

Pinout & Package

Package: TO-126-3LD (Case 340AS), molded plastic with exposed collector tab for direct heatsink mounting; lead-free per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-impedance return path; carries full load current in common-emitter configuration.
2 (Collector)	Current source terminal	Mounted to heatsink via metal tab; electrically connected to collector; requires insulation if heatsink is grounded.
3 (Base)	Control input terminal	Drives transistor into conduction; requires current-limited bias network to achieve target I_C and avoid thermal runaway.

Key Features

Feature	Design Value
Complementary pair with KSB772	Enables matched push-pull output stages without external matching; simplifies dual-rail amplifier design.
Low-speed switching capability	Validated for <100 kHz switching; suitable for PWM-driven audio drivers but not RF or fast digital switching.
TO-126 mechanical standardization	Ensures drop-in replacement across legacy designs using industry-standard footprint and mounting hole pattern.
h_FE grading (Y grade)	Guaranteed h_FE2 = 160–320 at I_C = 1 A; reduces need for individual bias trimming in production.

Applications

Audio Power Amplifier	DC Motor Driver Stage
Use Scenario: Final output stage in 5–10 W stereo amplifier modules for home audio and multimedia systems. IC Role / Device Role / Timing Role: NPN power switch in common-emitter configuration delivering current to 4–8 Ω speaker loads. Use Value: 3 A I_C and 10 W dissipation enable clean 8 Ω output at 5 W RMS; V_CE(sat) ≤ 0.5 V limits quiescent heating.	Use Scenario: H-bridge half-bridge leg driving 12 V brushed DC motors in industrial actuators and HVAC dampers. IC Role / Device Role / Timing Role: High-side or low-side switching element controlled by PWM microcontroller output. Use Value: 30 V BV_CEO accommodates 12 V supply with flyback margin; SOA curve supports 10 ms pulse overload during motor stall.
Linear Voltage Regulator Pass Element	Discrete Sensor Signal Amplifier
Use Scenario: Series pass transistor in adjustable 3–24 V linear regulators powering analog sensor subsystems. IC Role / Device Role / Timing Role: Continuously biased NPN transistor regulating output voltage via base drive from error amplifier. Use Value: 3 A I_C supports ≥2 A load current; h_FE stability over temperature enables predictable loop compensation.	Use Scenario: First-stage preamplifier for piezoelectric vibration sensors in predictive maintenance edge nodes. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration for gain control and linearity. Use Value: 90 MHz f_T preserves signal integrity up to 10 kHz; 45 pF C_ob avoids excessive high-frequency peaking in transimpedance feedback.

Audio Power Amplifier

DC Motor Driver Stage

Use Scenario: Final output stage in 5–10 W stereo amplifier modules for home audio and multimedia systems.

IC Role / Device Role / Timing Role: NPN power switch in common-emitter configuration delivering current to 4–8 Ω speaker loads.

Use Value: 3 A I_C and 10 W dissipation enable clean 8 Ω output at 5 W RMS; V_CE(sat) ≤ 0.5 V limits quiescent heating.

Use Scenario: H-bridge half-bridge leg driving 12 V brushed DC motors in industrial actuators and HVAC dampers.

IC Role / Device Role / Timing Role: High-side or low-side switching element controlled by PWM microcontroller output.

Use Value: 30 V BV_CEO accommodates 12 V supply with flyback margin; SOA curve supports 10 ms pulse overload during motor stall.

Linear Voltage Regulator Pass Element

Discrete Sensor Signal Amplifier

Use Scenario: Series pass transistor in adjustable 3–24 V linear regulators powering analog sensor subsystems.

IC Role / Device Role / Timing Role: Continuously biased NPN transistor regulating output voltage via base drive from error amplifier.

Use Value: 3 A I_C supports ≥2 A load current; h_FE stability over temperature enables predictable loop compensation.

Use Scenario: First-stage preamplifier for piezoelectric vibration sensors in predictive maintenance edge nodes.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration for gain control and linearity.

Use Value: 90 MHz f_T preserves signal integrity up to 10 kHz; 45 pF C_ob avoids excessive high-frequency peaking in transimpedance feedback.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD882G	Same TO-220 package; 30 V V_CEO, 3 A I_C, but h_FE = 30–150 (lower gain spread); higher R_thJC = 3.5°C/W vs. 2.5°C/W.	Less suitable for low-base-drive designs; requires larger heatsink for same power dissipation.	Select when TO-220 footprint is mandatory and gain variation is acceptable.
KSC2690AYS	TO-126 package; 30 V V_CEO, 2 A I_C, h_FE = 120–240; lower current rating and dissipation (5 W).	Limited to ≤2.5 W audio output; unsuitable for motor stall conditions requiring 7 A pulse current.	Select only for space-constrained, lower-power applications where 2 A peak suffices.

Compared with MJD882G and KSC2690AYS, the KSD882OS offers superior thermal resistance and tighter h_FE grading in the same TO-126 footprint, making it optimal for thermally demanding audio and motor drive roles where consistent gain and heatsink efficiency are critical.

Availability

KSD882OS is available at Aetrix Electronics and suitable for audio power amplifiers, DC motor driver stages, linear voltage regulator pass elements, and discrete sensor signal amplifiers requiring stable component supply and long-term industrial availability.

Supply support for KSD882OS 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The KSD882OS belongs to onsemi's discrete bipolar power transistor family, engineered for reliable linear amplification and moderate-speed switching in cost-sensitive, thermally constrained analog systems.

FAQ

What is the maximum continuous collector current rating for KSD882OS?

The KSD882OS has a maximum continuous collector current (I_C) rating of 3 A at T_A = 25°C. Derating applies above ambient temperature, and pulsed operation allows up to 7 A for ≤10 ms with ≤50% duty cycle. This rating directly determines its suitability for 5–10 W audio output stages and low-voltage motor drive applications where sustained current delivery is required. The KSD882OS must be heatsinked appropriately to maintain junction temperature within −55°C to +150°C limits.

Is KSD882OS pin-compatible with KSB772?

No, KSD882OS is not pin-compatible with KSB772 - it is electrically complementary (NPN vs. PNP), not mechanically identical. While both use TO-126-3LD packages, their pinouts differ: KSD882OS has E-C-B order (pins 1–2–3), whereas KSB772 uses E-B-C order. This difference requires PCB layout adjustment when implementing push-pull pairs. The KSD882OS datasheet explicitly states "complement to KSB772" for circuit function, not physical interchangeability.

What does the 'Y' suffix in KSD882OS indicate?

On the KSD882OS, the 'Y' suffix denotes h_FE grade classification, specifying a DC current gain (h_FE2) range of 160–320 at V_CE = 2 V and I_C = 1 A. This grading ensures tighter parametric consistency across production lots, reducing the need for post-manufacture bias calibration in amplifier designs. The 'S' in KSD882OS confirms Pb-free compliance per J-STD-020, and 'O' indicates tape-and-reel packaging - distinct from bulk or tube variants like KSD882YSTU.

Can KSD882OS be used in switching power supplies?

The KSD882OS is characterized for low-speed switching only, with no specified t_on/t_off or storage time parameters in its datasheet. Its 90 MHz f_T and 45 pF C_ob support operation up to ~100 kHz, but lack of optimized switching metrics makes it unsuitable for modern SMPS designs requiring fast transitions and low switching loss. For such applications, MOSFETs or purpose-designed switching BJTs like the MMBT5551 are preferred. The KSD882OS remains appropriate for PWM-driven audio or motor control below 20 kHz.

What thermal considerations apply to KSD882OS in TO-126-3LD package?

The KSD882OS in TO-126-3LD has a junction-to-case thermal resistance (R_thJC) of 2.5°C/W, meaning each watt dissipated raises the junction temperature 2.5°C above case temperature. With 10 W max dissipation at T_C = 25°C, effective heatsinking is mandatory - even modest loads require a minimum 10 cm² aluminum heatsink. Derating curves show power must decrease linearly above 25°C case temperature, reaching zero at ~125°C. Mounting torque and thermal interface material quality directly impact real-world performance of the KSD882OS.

KSD882OS Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-225AA, TO-126-3

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 3 A

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 200mA, 2A

Current - Collector Cutoff (Max):: 1µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 1A, 2V

Power - Max:: 1 W

Frequency - Transition:: 90MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-126-3

KSD882OS FAQ

1.How can I place an order for KSD882OS through Aetrix?

Please submit a Request for Quotation (RFQ) for KSD882OS 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 KSD882OS reliable?

The price and inventory of KSD882OS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSD882OS is usually 5 days.

3.What payment methods are accepted for KSD882OS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSD882OS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSD882OS?

KSD882OS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSD882OS 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 KSD882OS?

For technical support, including KSD882OS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSD882OS requirements.

6.How does Aetrix verify that KSD882OS is sourced from the original manufacturer or authorized distributors?

All KSD882OS 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 KSD882OS meets industry standards.

7.What is the process for return or replacement of KSD882OS?

All KSD882OS units undergo pre-shipment inspection (PSI). If there is an issue with KSD882OS, 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 KSD882OS part is unused and in its original packaging.

Return procedure for KSD882OS:

1.Submit a request within 90 days.

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

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