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

onsemi KSD882YSTSSTU

Name: KSD882YSTSSTU
Brand: onsemi
SKU: KSD882YSTSSTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSD882YSTSSTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: KSD882YSTSSTU.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSD882YSTSSTU 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 dissipation at T_C = 25°C; it delivers h_FE of 160–320 at I_C = 1 A and is optimized for audio frequency power amplifier stages.

For engineers reviewing the KSD882YSTSSTU datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO/I_C rating match, h_FE grade Y (160–320), TO-126 mechanical compatibility, saturation voltage under 2 A drive, and complementary pairing with KSB772 for push-pull output stages.

Technical Context

This discrete NPN transistor operates in linear amplification and low-speed switching modes, with a current gain bandwidth product (f_T) of 90 MHz and output capacitance (C_ob) of 45 pF at 10 V V_CB. Its safe operating area (SOA) supports pulsed I_C up to 7 A (PW ≤ 10 ms, duty ≤ 50%) and DC operation up to 3 A with thermal derating above 25°C case temperature.

The device features graded h_FE classification - Y-grade specifies h_FE2 = 160–320 at V_CE = 2 V, I_C = 1 A - and exhibits V_CE(sat) ≤ 0.5 V and V_BE(sat) ≤ 2.0 V under I_C = 2 A / I_B = 0.2 A conditions, enabling efficient Class AB audio output stage design.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum sustainable collector-emitter voltage before breakdown; defines rail voltage limit in amplifier output stages.
I_C (DC)	3 A - Continuous collector current capability; sets peak RMS output power handling in audio amplifiers.
h_FE (Y-grade)	160–320 - Confirmed DC current gain range at I_C = 1 A; ensures predictable bias stability in emitter-follower or driver configurations.
V_CE(sat)	≤ 0.5 V @ I_C = 2 A, I_B = 0.2 A - Low saturation voltage minimizes conduction loss and heat generation in switching or saturated amplifier use.
f_T	90 MHz - Current gain-bandwidth product; supports stable operation up to mid-audio frequencies with margin for feedback loop stability.
C_ob	45 pF @ V_CB = 10 V - Output junction capacitance; impacts high-frequency roll-off and Miller effect in common-emitter amplifier topologies.

Pinout & Package

Package: TO-126-3LD (Case 340AS), Pb-free, through-hole mounting with integral heat sink tab. Pin 1 = Emitter, Pin 2 = Collector (tab-connected), Pin 3 = Base.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current exit path from transistor	Connected to ground or low-impedance return; requires low-inductance layout for audio fidelity.
2 (Collector)	Current entry path; electrically tied to metal tab	Tab serves as primary thermal path and high-current node; must be mounted to heatsink with electrical isolation if needed.
3 (Base)	Control terminal for minority carrier injection	Drives transistor into active/saturation; requires current-limited bias network to avoid overdrive beyond 0.6 A max.

Key Features

Feature	Design Value
Y-grade h_FE binning	Guaranteed h_FE = 160–320 at I_C = 1 A, enabling consistent gain matching in dual-channel or push-pull amplifier designs.
Complementary pairing	Designed as direct NPN complement to KSB772 PNP transistor, supporting matched thermal and gain characteristics in Class AB output stages.
Low V_CE(sat)	0.3 V typical at I_C = 2 A - reduces power loss and improves efficiency in linear amplifier operation.
TO-126 thermal performance	10 W dissipation at T_C = 25°C with defined derating curve - enables compact heatsink integration in consumer audio equipment.

Applications

Audio Power Amplifier	DC Motor Driver Stage
Use Scenario: Final output stage in 5–20 W stereo audio amplifiers driving 4–8 Ω speakers. IC Role / Device Role / Timing Role: NPN power switch/amplifier in complementary Class AB topology with KSB772. Use Value: Delivers low-distortion linear gain with V_CE(sat) ≤ 0.5 V and h_FE ≥ 160, minimizing crossover distortion and thermal drift.	Use Scenario: H-bridge low-side switch or single-ended driver for small brushed DC motors (≤ 24 V, ≤ 2 A). IC Role / Device Role / Timing Role: Discrete NPN switch controlling motor current flow to ground. Use Value: Supports 7 A pulsed current for motor startup surges while maintaining < 0.5 V saturation drop at 2 A continuous load.
Power Supply Pass Transistor	Linear Voltage Regulator Booster
Use Scenario: Series pass element in adjustable linear regulators delivering up to 3 A output current. IC Role / Device Role / Timing Role: High-current series regulator transistor dissipating up to 10 W at T_C = 25°C. Use Value: Enables stable regulation with minimal dropout due to low V_CE(sat) and robust SOA covering transient overloads.	Use Scenario: Boosting current capability of IC-based regulators (e.g., LM317) in lab bench supplies or LED drivers. IC Role / Device Role / Timing Role: External pass transistor augmenting internal regulator's current limit. Use Value: Extends output current to 3 A while retaining IC's voltage reference accuracy and thermal foldback protection.

Audio Power Amplifier

DC Motor Driver Stage

Use Scenario: Final output stage in 5–20 W stereo audio amplifiers driving 4–8 Ω speakers.

IC Role / Device Role / Timing Role: NPN power switch/amplifier in complementary Class AB topology with KSB772.

Use Value: Delivers low-distortion linear gain with V_CE(sat) ≤ 0.5 V and h_FE ≥ 160, minimizing crossover distortion and thermal drift.

Use Scenario: H-bridge low-side switch or single-ended driver for small brushed DC motors (≤ 24 V, ≤ 2 A).

IC Role / Device Role / Timing Role: Discrete NPN switch controlling motor current flow to ground.

Use Value: Supports 7 A pulsed current for motor startup surges while maintaining < 0.5 V saturation drop at 2 A continuous load.

Power Supply Pass Transistor

Linear Voltage Regulator Booster

Use Scenario: Series pass element in adjustable linear regulators delivering up to 3 A output current.

IC Role / Device Role / Timing Role: High-current series regulator transistor dissipating up to 10 W at T_C = 25°C.

Use Value: Enables stable regulation with minimal dropout due to low V_CE(sat) and robust SOA covering transient overloads.

Use Scenario: Boosting current capability of IC-based regulators (e.g., LM317) in lab bench supplies or LED drivers.

IC Role / Device Role / Timing Role: External pass transistor augmenting internal regulator's current limit.

Use Value: Extends output current to 3 A while retaining IC's voltage reference accuracy and thermal foldback protection.

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	Different h_FE grading (100–300); TO-252 surface-mount package vs. TO-126 through-hole; same V_CEO/I_C ratings.	Requires PCB rework for SMT assembly; unsuitable for legacy through-hole designs without adapter.	Select MJD882G only when migrating to surface-mount production and thermal management permits lower-case dissipation.
KSC2690Y	Higher V_CEO = 60 V; same TO-126 package; h_FE = 160–320 (Y-grade); f_T = 100 MHz.	Better voltage headroom for 48 V systems; higher f_T supports wider bandwidth but increases RF susceptibility risk.	Choose KSC2690Y where supply rails exceed 30 V or extended frequency response is required beyond audio band.

Compared with MJD882G and KSC2690Y, KSD882YSTSSTU provides optimal fit for cost-sensitive, through-hole audio amplifier designs requiring guaranteed Y-grade h_FE, proven thermal behavior in TO-126, and direct complementarity with KSB772 - without SMT conversion or over-spec'd voltage margins.

Availability

KSD882YSTSSTU is available at Aetrix Electronics and suitable for audio power amplifiers, DC motor control circuits, and linear voltage regulator boosters requiring stable component supply, long-term industrial availability, and Pb-free compliance.

Supply support for KSD882YSTSSTU 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 KSD882 series belongs to onsemi's general-purpose bipolar power transistor family, engineered specifically for audio frequency amplification and low-speed switching in cost-sensitive industrial and consumer applications.

FAQ

What is the h_FE range for KSD882YSTSSTU?

The KSD882YSTSSTU is Y-grade, meaning its DC current gain (h_FE) is specified as 160–320 when measured at V_CE = 2 V and I_C = 1 A. This binning ensures consistent gain performance across units, critical for matched-pair amplifier designs. The KSD882YSTSSTU datasheet confirms this range in the h_FE Classification table and Electrical Characteristics section.

Is KSD882YSTSSTU pin-compatible with KSB772?

No - KSD882YSTSSTU (NPN) and KSB772 (PNP) are complementary transistors, not pin-compatible. They share identical TO-126-3LD packaging and mechanical footprint, but pin assignments differ: KSD882YSTSSTU has Emitter-Collector-Base (1-2-3), while KSB772 uses Emitter-Collector-Base in reversed polarity (1-2-3 maps to E-C-B for NPN, but C-E-B for PNP). Circuit layout must account for polarity reversal.

What is the maximum pulsed collector current for KSD882YSTSSTU?

The KSD882YSTSSTU supports a maximum pulsed collector current (I_CP) of 7 A, defined under conditions of pulse width ≤ 10 ms and duty cycle ≤ 50%. This rating enables reliable handling of short-duration overload events such as speaker pop suppression or motor stall currents. The KSD882YSTSSTU Absolute Maximum Ratings table explicitly lists this value.

Does KSD882YSTSSTU require a heatsink in standard operation?

Yes - the KSD882YSTSSTU dissipates up to 10 W at T_C = 25°C, and its thermal resistance (R_θJC) necessitates heatsinking for any sustained I_C > ~1.5 A or ambient temperatures above 40°C. The Safe Operating Area curves and Power Derating graph in the KSD882YSTSSTU datasheet show rapid power reduction above 25°C case temperature, confirming mandatory heatsink use in power amplifier applications.

What does "YSTSSTU" mean in the KSD882YSTSSTU part number?

In KSD882YSTSSTU, "Y" denotes the h_FE grade (160–320), "STS" indicates tape-and-reel packaging per EIA-481 standard, "TU" signifies Pb-free (RoHS-compliant) processing, and the full suffix confirms TO-126-3LD packaging. This full ordering code distinguishes it from bulk (KSD882YS) and other variants, ensuring correct procurement of the Y-grade, RoHS-compliant, tape-and-reel version of KSD882YSTSSTU.

KSD882YSTSSTU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tube

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:: 160 @ 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

KSD882YSTSSTU FAQ

1.How can I place an order for KSD882YSTSSTU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSD882YSTSSTU 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 KSD882YSTSSTU reliable?

The price and inventory of KSD882YSTSSTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSD882YSTSSTU is usually 5 days.

3.What payment methods are accepted for KSD882YSTSSTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSD882YSTSSTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSD882YSTSSTU?

KSD882YSTSSTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSD882YSTSSTU 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 KSD882YSTSSTU?

For technical support, including KSD882YSTSSTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSD882YSTSSTU requirements.

6.How does Aetrix verify that KSD882YSTSSTU is sourced from the original manufacturer or authorized distributors?

All KSD882YSTSSTU 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 KSD882YSTSSTU meets industry standards.

7.What is the process for return or replacement of KSD882YSTSSTU?

All KSD882YSTSSTU units undergo pre-shipment inspection (PSI). If there is an issue with KSD882YSTSSTU, 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 KSD882YSTSSTU part is unused and in its original packaging.

Return procedure for KSD882YSTSSTU:

1.Submit a request within 90 days.

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

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