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

onsemi KSC3265YMTF

Name: KSC3265YMTF
Brand: onsemi
SKU: KSC3265YMTF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSC3265YMTF

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: KSC3265YMTF.pdf

Description:: TRANS NPN 25V 0.8A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSC3265YMTF from onsemi is an NPN epitaxial silicon transistor designed for low-frequency power amplifier applications, with V_CEO = 25 V, I_C = 800 mA, P_C = 200 mW, h_FE = 160–320 at I_C = 800 mA, and f_T = 120 MHz - used in audio output stages and driver circuits requiring stable gain and low saturation voltage.

For engineers reviewing the KSC3265YMTF datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain grading (Y = 160–320), SOT-23 package thermal limits, V_CE(sat) ≤ 0.4 V at high drive, and complementary pairing with KSA1298 in push-pull configurations.

Technical Context

This discrete NPN transistor operates in linear amplification mode with specified h_FE min/max across two test conditions: 100–320 at V_CE = 1 V/6 V and I_C = 100 mA/800 mA. Its f_T of 120 MHz supports low-frequency RF and audio bandwidths up to ~10 MHz.

Designed for surface-mount use in compact amplifier stages, it features low Cob (13 pF) and tight V_BE(on) (0.5–0.8 V), enabling predictable biasing in Class-A or AB topologies without external compensation networks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	25 V - maximum safe collector-emitter voltage before breakdown in common-emitter configuration
I_C	800 mA - continuous collector current rating defining usable output drive capability
P_C	200 mW - thermal power limit at T_A = 25 °C; derates above 25 °C per package thermal resistance
h_FE	160–320 - guaranteed DC current gain range at V_CE = 6 V, I_C = 800 mA for Y-grade devices
V_CE(sat)	≤ 0.4 V - collector-emitter voltage under saturated switching at I_C = 500 mA, I_B = 20 mA
f_T	120 MHz - unity-gain frequency confirming usable bandwidth for audio and LF signal amplification

Pinout & Package

SOT-23 (TO-236) plastic surface-mount package, 2.90 × 1.30 × 1.00 mm body size, 1.90 mm lead pitch, rated for reflow soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased junction; requires 0.5–0.8 V relative to emitter to turn on
2	Emitter	Current sink node; connected to ground or negative rail in common-emitter amplifier configurations
3	Collector	Output current source node; connects to load and positive supply via collector resistor or transformer

Key Features

Feature	Design Value
Complementary pair	Explicitly matched to KSA1298 PNP for balanced push-pull amplifier designs
High h_FE grade	Y-grade guarantees h_FE ≥ 160 at I_C = 800 mA, reducing base drive requirements
Low V_CE(sat)	≤ 0.4 V enables efficient operation in Class-AB output stages with minimal power loss
Pb-free packaging	SOT-23 package conforms to RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles

Applications

Audio Power Amplifier	DC Motor Driver Stage
Use Scenario: Final output stage in portable mono audio amplifiers driving 8 Ω speakers. IC Role / Device Role / Timing Role: NPN power switch amplifying line-level input to deliver >300 mW into speaker load. Use Value: Low V_CE(sat) minimizes heat generation; h_FE ≥ 160 ensures stable gain without excessive base current draw.	Use Scenario: H-bridge half-bridge driver for small brushed DC motors (≤5 V, ≤600 mA). IC Role / Device Role / Timing Role: High-side NPN switch controlling motor voltage polarity in discrete driver IC alternatives. Use Value: 25 V V_CEO and 800 mA I_C support 5 V logic-compatible motor control with margin.
Low-Frequency Signal Amplifier	Complementary Push-Pull Pair
Use Scenario: Pre-amplifier stage in sensor signal conditioning circuits operating below 1 MHz. IC Role / Device Role / Timing Role: Linear amplifier boosting weak analog signals from thermistors or potentiometers. Use Value: 120 MHz f_T and low Cob (13 pF) preserve signal integrity without phase shift or roll-off.	Use Scenario: Paired with KSA1298 in Class-B audio output stage for zero-crossing distortion reduction. IC Role / Device Role / Timing Role: NPN half of complementary emitter-follower pair delivering symmetrical positive/negative swing. Use Value: Matched h_FE grading and thermal characteristics ensure balanced conduction and reduced crossover distortion.

Audio Power Amplifier

DC Motor Driver Stage

Use Scenario: Final output stage in portable mono audio amplifiers driving 8 Ω speakers.

IC Role / Device Role / Timing Role: NPN power switch amplifying line-level input to deliver >300 mW into speaker load.

Use Value: Low V_CE(sat) minimizes heat generation; h_FE ≥ 160 ensures stable gain without excessive base current draw.

Use Scenario: H-bridge half-bridge driver for small brushed DC motors (≤5 V, ≤600 mA).

IC Role / Device Role / Timing Role: High-side NPN switch controlling motor voltage polarity in discrete driver IC alternatives.

Use Value: 25 V V_CEO and 800 mA I_C support 5 V logic-compatible motor control with margin.

Low-Frequency Signal Amplifier

Complementary Push-Pull Pair

Use Scenario: Pre-amplifier stage in sensor signal conditioning circuits operating below 1 MHz.

IC Role / Device Role / Timing Role: Linear amplifier boosting weak analog signals from thermistors or potentiometers.

Use Value: 120 MHz f_T and low Cob (13 pF) preserve signal integrity without phase shift or roll-off.

Use Scenario: Paired with KSA1298 in Class-B audio output stage for zero-crossing distortion reduction.

IC Role / Device Role / Timing Role: NPN half of complementary emitter-follower pair delivering symmetrical positive/negative swing.

Use Value: Matched h_FE grading and thermal characteristics ensure balanced conduction and reduced crossover distortion.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN low-frequency power amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT3904LT1G	Lower I_C (200 mA), lower P_C (310 mW), h_FE = 100–300, f_T = 300 MHz	Not suitable for 800 mA output stages; better for general-purpose switching or low-current amplification	Select only if load current ≤ 200 mA and higher f_T is prioritized over drive strength
BC847BMTF	Same SOT-23 package; I_C = 100 mA, P_C = 310 mW, h_FE = 200–450, f_T = 100 MHz	Limited to small-signal amplification; insufficient for power output roles requiring >500 mA	Use where gain linearity and low-noise matter more than output current capability

Compared with MMBT3904LT1G and BC847BMTF, the KSC3265YMTF delivers 4× higher collector current and is specifically characterized for power amplifier duty - making it the only option among the three qualified for 800 mA continuous operation with guaranteed h_FE at full load.

Availability

KSC3265YMTF is available at Aetrix Electronics and suitable for audio power amplifiers, DC motor drivers, low-frequency signal amplifiers, and complementary push-pull output stages requiring stable component supply and consistent h_FE grading.

Supply support for KSC3265YMTF 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, serving automotive, industrial, cloud, and IoT markets with discrete, analog, and power management solutions.

The KSC3265YMTF belongs to onsemi's legacy bipolar transistor product line, engineered for cost-sensitive, high-reliability linear amplifier and switching applications in consumer and industrial equipment.

FAQ

What is the h_FE grade designation for KSC3265YMTF?

The "Y" in KSC3265YMTF indicates the h_FE grade: minimum DC current gain of 160 at V_CE = 6 V and I_C = 800 mA, with upper limit of 320. This grading ensures predictable base drive requirements in high-current amplifier designs and distinguishes it from "O"-grade (100–200) variants.

Is KSC3265YMTF pin-compatible with other SOT-23 transistors?

KSC3265YMTF uses Style 6 pinout (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector) per onsemi's mechanical drawings. While physically compatible with SOT-23 footprints, electrical compatibility depends on gain, voltage, and current ratings - it is not a drop-in replacement for generic SOT-23 NPNs without verifying h_FE, V_CEO, and thermal limits.

What is the maximum operating temperature for KSC3265YMTF?

KSC3265YMTF has a maximum junction temperature (T_J) of 150 °C and storage temperature range of −55 °C to +150 °C. Derating is required above 25 °C ambient: power dissipation decreases linearly as ambient rises, governed by its thermal resistance (R_θJA ≈ 625 °C/W for SOT-23 on standard FR-4).

Does KSC3265YMTF support Pb-free assembly processes?

Yes, KSC3265YMTF is manufactured in a Pb-free SOT-23 package compliant with RoHS Directive 2011/65/EU and qualified for standard lead-free reflow soldering per JEDEC J-STD-020. The "TF" suffix explicitly denotes tape-and-reel Pb-free packaging.

How does KSC3265YMTF differ from the base KSC3265 part number?

KSC3265YMTF specifies the Y-grade h_FE (160–320), SOT-23 package, Pb-free finish, and tape-and-reel shipping (3000 units/reel). The base KSC3265 refers to the generic device family; "YMTF" adds critical manufacturing and grading identifiers essential for design-in and procurement accuracy.

KSC3265YMTF Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 800 mA

Voltage - Collector Emitter Breakdown (Max):: 25 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 20mA, 500mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 160 @ 100mA, 1V

Power - Max:: 200 mW

Frequency - Transition:: 120MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

KSC3265YMTF FAQ

1.How can I place an order for KSC3265YMTF through Aetrix?

Please submit a Request for Quotation (RFQ) for KSC3265YMTF 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 KSC3265YMTF reliable?

The price and inventory of KSC3265YMTF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC3265YMTF is usually 5 days.

3.What payment methods are accepted for KSC3265YMTF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC3265YMTF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSC3265YMTF?

KSC3265YMTF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSC3265YMTF 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 KSC3265YMTF?

For technical support, including KSC3265YMTF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC3265YMTF requirements.

6.How does Aetrix verify that KSC3265YMTF is sourced from the original manufacturer or authorized distributors?

All KSC3265YMTF 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 KSC3265YMTF meets industry standards.

7.What is the process for return or replacement of KSC3265YMTF?

All KSC3265YMTF units undergo pre-shipment inspection (PSI). If there is an issue with KSC3265YMTF, 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 KSC3265YMTF part is unused and in its original packaging.

Return procedure for KSC3265YMTF:

1.Submit a request within 90 days.

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

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