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

onsemi KSD882YSTU

Name: KSD882YSTU
Brand: onsemi
SKU: KSD882YSTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSD882YSTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: KSD882YSTU.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSD882YSTU from onsemi is an NPN epitaxial silicon transistor designed for audio frequency power amplification, with a 30 V collector-emitter breakdown voltage (BV_CEO), 3 A DC collector current rating (I_C), and 10 W total device dissipation at T_C = 25°C. It features h_FE of 160–320 at I_C = 1 A, V_CE(sat) ≤ 0.5 V at I_C = 2 A/I_B = 0.2 A, and f_T = 90 MHz - enabling use in Class AB audio output stages and low-speed switching circuits.

For engineers reviewing the KSD882YSTU datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-126-3LD package thermal performance, h_FE grade Y classification (160–320), safe operating area (SOA) limits under pulsed conditions, and complementary pairing with KSB772 for push-pull amplifier designs.

Technical Context

This discrete NPN bipolar junction transistor operates in linear amplification mode with specified DC gain (h_FE) across two test points: 30–150 at I_C = 20 mA and 160–320 at I_C = 1 A. Its SOA is defined by dissipation-limited and secondary breakdown-limited boundaries, supporting pulsed IC up to 7 A (PW ≤ 10 ms, duty ≤ 50%).

The device exhibits V_BE(sat) = 1.0–2.0 V and V_CE(sat) = 0.3–0.5 V under I_C = 2 A/I_B = 0.2 A, confirming suitability for medium-current saturated switching. Cob = 45 pF at V_CB = 10 V enables predictable high-frequency roll-off in audio driver applications.

Key Specifications

Parameter	Value and Actual Design Meaning
BV_CEO	30 V - maximum sustainable collector-emitter voltage before avalanche breakdown; sets rail voltage limit in audio amplifier output stage
I_C (DC)	3 A - continuous collector current capability; supports ≥5 W Class AB audio output into 8 Ω loads
h_FE (I_C = 1 A)	160–320 - guaranteed DC current gain range for Y-grade; ensures stable biasing in emitter-follower or common-emitter 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 operation
f_T	90 MHz - unity-gain bandwidth; sufficient for full-range audio amplification (20 Hz–20 kHz) with margin
C_ob	45 pF @ V_CB = 10 V - output capacitance affects high-frequency stability and Miller effect in common-emitter amplifiers
P_D (T_C = 25°C)	10 W - thermal power limit at case temperature; requires heatsink for sustained >2 W dissipation

Pinout & Package

Package: TO-126-3LD (Case 340AS), surface-mount compatible through-hole package with integral metal tab for heatsinking. Mounting screw hole centered on tab; leads are straight and coplanar.

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	Connected to positive supply rail via load; voltage swing limited to BV_CEO = 30 V
3 (Base)	Control input terminal	Receives current-driven signal; requires ~0.2 A base drive for 2 A collector saturation

Key Features

Feature	Design Value
h_FE Grade Y	Guaranteed h_FE = 160–320 at I_C = 1 A, enabling consistent bias point setting without individual trimming
Complementary Pairing	Designed as direct complement to KSB772 PNP transistor, simplifying push-pull amplifier layout and thermal tracking
TO-126 Thermal Performance	10 W dissipation at T_C = 25°C with metal tab contact; enables compact heatsink integration in space-constrained audio modules
Low-Speed Switching Optimized	Specified I_CP = 7 A (10 ms/50% duty) and V_CE(sat) ≤ 0.5 V support reliable relay driving and motor control at <10 kHz

Applications

Audio Power Amplifier Output Stage	DC Motor Driver (Low-Speed)
Use Scenario: Final output stage in 5–10 W Class AB audio amplifier feeding 4–8 Ω speakers. IC Role / Device Role / Timing Role: NPN power switch in emitter-follower or common-emitter topology, delivering peak current up to 2.5 A. Use Value: Low V_CE(sat) reduces thermal load; h_FE consistency ensures matched gain with complementary KSB772 for low crossover distortion.	Use Scenario: H-bridge half-bridge leg driving 12 V/2 A brushed DC motors in industrial actuators. IC Role / Device Role / Timing Role: Medium-current saturated switch controlling motor direction and enable state. Use Value: 3 A DC rating and 7 A pulse capability handle motor stall currents; TO-126 tab allows direct heatsink mounting for continuous 1.5 A operation.
Relay Driver Circuit	Linear Voltage Regulator Pass Element
Use Scenario: Driving 24 V/500 mA electromagnetic relays in PLC I/O modules. IC Role / Device Role / Timing Role: Single-transistor switch interfacing microcontroller GPIO to relay coil. Use Value: 30 V BV_CEO safely clamps inductive kickback; 0.2 A base drive requirement matches standard logic-level outputs.	Use Scenario: Pass transistor in adjustable 3–24 V, 1.5 A linear regulator for analog sensor supplies. IC Role / Device Role / Timing Role: Series pass element dissipating up to 8 W under worst-case dropout conditions. Use Value: 10 W rated dissipation with heatsink support enables stable regulation without thermal shutdown at full load.

Audio Power Amplifier Output Stage

DC Motor Driver (Low-Speed)

Use Scenario: Final output stage in 5–10 W Class AB audio amplifier feeding 4–8 Ω speakers.

IC Role / Device Role / Timing Role: NPN power switch in emitter-follower or common-emitter topology, delivering peak current up to 2.5 A.

Use Value: Low V_CE(sat) reduces thermal load; h_FE consistency ensures matched gain with complementary KSB772 for low crossover distortion.

Use Scenario: H-bridge half-bridge leg driving 12 V/2 A brushed DC motors in industrial actuators.

IC Role / Device Role / Timing Role: Medium-current saturated switch controlling motor direction and enable state.

Use Value: 3 A DC rating and 7 A pulse capability handle motor stall currents; TO-126 tab allows direct heatsink mounting for continuous 1.5 A operation.

Relay Driver Circuit

Linear Voltage Regulator Pass Element

Use Scenario: Driving 24 V/500 mA electromagnetic relays in PLC I/O modules.

IC Role / Device Role / Timing Role: Single-transistor switch interfacing microcontroller GPIO to relay coil.

Use Value: 30 V BV_CEO safely clamps inductive kickback; 0.2 A base drive requirement matches standard logic-level outputs.

Use Scenario: Pass transistor in adjustable 3–24 V, 1.5 A linear regulator for analog sensor supplies.

IC Role / Device Role / Timing Role: Series pass element dissipating up to 8 W under worst-case dropout conditions.

Use Value: 10 W rated dissipation with heatsink support enables stable regulation without thermal shutdown at full load.

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 die, TO-252 (DPAK) package; lower thermal resistance (R_θJC = 2.5°C/W vs. TO-126's 3.0°C/W); h_FE grade G (200–400)	Better suited for surface-mount automated assembly; higher h_FE reduces required base drive current	Select MJD882G when SMT production, tighter base drive budgets, or improved thermal performance are priorities
KSC2690Y	Higher BV_CEO = 60 V; same TO-126-3LD package; h_FE = 160–320; f_T = 100 MHz	Supports higher supply rails (e.g., 48 V systems); wider SOA for transient overloads	Select KSC2690Y when operating above 30 V or requiring enhanced surge immunity in industrial controls

Compared with MJD882G and KSC2690Y, the KSD882YSTU offers optimal cost-performance balance for 24–30 V audio and relay applications where TO-126 through-hole mounting and proven reliability are required, while avoiding over-specification in voltage or packaging.

Availability

KSD882YSTU is available at Aetrix Electronics and suitable for audio power amplifiers, DC motor drivers, relay interface circuits, and linear regulator pass elements requiring stable component supply and long-term industrial availability.

Supply support for KSD882YSTU 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The KSD882YSTU belongs to onsemi's general-purpose bipolar power transistor product line, engineered for robustness and consistency in analog power control and audio signal amplification.

FAQ

What is the h_FE range for KSD882YSTU and how is it verified?

The KSD882YSTU has a guaranteed h_FE range of 160–320 when tested at V_CE = 2 V and I_C = 1 A, corresponding to its "Y" grade marking. This range is validated per onsemi's production test flow using automated parametric testers and is documented in the official KSD882/D datasheet Rev. 4. Each KSD882YSTU unit meets this specification before shipment.

Can KSD882YSTU be used in place of KSD882YS?

Yes - KSD882YSTU and KSD882YS share identical electrical specifications, TO-126-3LD package, and h_FE grade Y. The "TU" suffix indicates tape-and-reel packaging (1920 units/tube), while "YS" denotes bulk bag (2000 units). Electrical performance, thermal behavior, and pinout are fully interchangeable; only packaging logistics differ.

What is the maximum safe pulsed collector current for KSD882YSTU?

The KSD882YSTU supports I_CP = 7 A under pulsed conditions defined as pulse width ≤ 10 ms and duty cycle ≤ 50%, per Absolute Maximum Ratings. Exceeding these limits risks secondary breakdown. For reliable operation, design within the SOA curves shown in Figure 6 of the KSD882/D datasheet.

Does KSD882YSTU require a heatsink in typical audio amplifier use?

Yes - when dissipating >2 W continuously (e.g., 1.5 A I_C at 1.5 V V_CE), the KSD882YSTU requires a heatsink mounted to its metal tab. Its R_θJC = 3.0°C/W and T_J(max) = +150°C necessitate thermal design per Figure 7 derating curve; unheatsinked operation is limited to <1 W at ambient temperatures above 50°C.

Is KSD882YSTU RoHS compliant and lead-free?

Yes - KSD882YSTU is explicitly marked "Pb−Free" in the Ordering Information section of the onsemi datasheet and conforms to RoHS Directive 2011/65/EU. The TO-126-3LD package uses lead-free terminations and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for through-hole assembly.

KSD882YSTU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tube

Product Status:: Last Time Buy

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

KSD882YSTU FAQ

1.How can I place an order for KSD882YSTU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSD882YSTU 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 KSD882YSTU reliable?

The price and inventory of KSD882YSTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSD882YSTU is usually 5 days.

3.What payment methods are accepted for KSD882YSTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSD882YSTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSD882YSTU?

KSD882YSTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSD882YSTU 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 KSD882YSTU?

For technical support, including KSD882YSTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSD882YSTU requirements.

6.How does Aetrix verify that KSD882YSTU is sourced from the original manufacturer or authorized distributors?

All KSD882YSTU 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 KSD882YSTU meets industry standards.

7.What is the process for return or replacement of KSD882YSTU?

All KSD882YSTU units undergo pre-shipment inspection (PSI). If there is an issue with KSD882YSTU, 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 KSD882YSTU part is unused and in its original packaging.

Return procedure for KSD882YSTU:

1.Submit a request within 90 days.

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

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