Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi 2SD600KF

Name: 2SD600KF
Brand: onsemi
SKU: 2SD600KF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 2SD600KF

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2SD600KF.pdf

Description:: TRANS NPN 120V 1A TO-126

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:35,492

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

2SD600KF from onsemi is an NPN epitaxial planar silicon power transistor in TO-126 package, rated for 100 V V_CEO, 1 A I_C, and 1 W P_C at T_c = 25 °C, designed for low-frequency power amplifier and switching applications in industrial and consumer audio systems.

For engineers reviewing the 2SD600KF datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CEO = 100 V, h_FE range of 60–240 at I_C = −50 mA, V_CE(sat) ≤ −0.4 V at I_C = −500 mA / I_B = −50 mA, and TO-126 thermal performance with mica insulator compatibility.

Technical Context

The 2SD600KF operates as a general-purpose NPN bipolar junction transistor optimized for linear amplification and medium-speed switching. Its design emphasizes low saturation voltage and high DC current gain linearity across collector currents from 1 mA to 1 A, with f_T = 110 MHz at V_CE = −10 V and I_C = −50 mA.

It features a robust breakdown rating: V_CB0 = −120 V (open-emitter), V_CEO = −100 V (open-base), and V_EB0 = −5 V (open-collector), enabling reliable operation in Class AB audio output stages and relay drivers where voltage margin and thermal stability are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−100 V - Maximum safe collector-to-emitter voltage with base open; defines usable supply rail headroom in amplifier designs.
I_C (max)	−1 A - Continuous collector current rating; supports output stages delivering up to ~0.5 W into 8 Ω loads.
P_C (T_c=25°C)	1 W - Power dissipation limit at case temperature 25°C; requires heatsinking above ~0.3 W ambient operation.
h_FE @ I_C=−50 mA	60–240 - DC current gain range per h_FE binning (Rank D/E/F); enables predictable biasing in fixed-gain amplifier topologies.
V_CE(sat)	≤ −0.4 V @ I_C=−500 mA, I_B=−50 mA - Low saturation voltage reduces conduction loss in switching applications.
f_T	110 MHz @ V_CE=−10 V, I_C=−50 mA - Transition frequency confirms suitability for audio-band amplification and sub-MHz switching.

Pinout & Package

2SD600KF is housed in a TO-126 plastic package with integral metal tab for heatsink mounting. The package conforms to JEDEC TO-126 outline and uses mica insulation compatible with standard mounting hardware.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-side return path; electrically isolated from heatsink via mica when mounted.
2 (Collector)	Current source terminal	Internally bonded to metal tab; must be insulated from chassis/heatsink unless common-grounded.
3 (Base)	Control input	Receives forward-bias current to drive transistor into active/saturation; requires current-limiting resistor in most circuits.

Key Features

Feature	Design Value
High V_CEO rating	−100 V enables use in 48 V and 60 V DC supply rails without derating in industrial control outputs.
Low V_CE(sat)	≤ −0.4 V minimizes power loss and self-heating in linear regulators and driver stages operating near saturation.
h_FE linearity	Consistent gain across I_C = 1 mA to 1 A supports stable Class A/B biasing without thermal runaway in discrete amplifiers.
TO-126 thermal interface	Metal tab allows direct heatsink attachment with silicone grease and mica insulator, supporting >1 W dissipation with proper thermal design.

Applications

Audio Power Amplifier	DC Motor Driver
Use Scenario: Output stage in 5–10 W Class AB audio amplifiers for consumer speakers and instrument preamps. IC Role / Device Role / Timing Role: NPN power switch amplifying line-level signals to drive 4–8 Ω speaker loads. Use Value: V_CEO = −100 V provides 2× safety margin over ±35 V rails; h_FE ≥ 60 ensures stable quiescent current setting.	Use Scenario: H-bridge low-side switch controlling brushed DC motors in robotics and HVAC actuators. IC Role / Device Role / Timing Role: Medium-current NPN switch sinking up to 1 A motor current under PWM control. Use Value: V_CE(sat) ≤ −0.4 V limits conduction loss to <0.4 W at 1 A, reducing thermal load in compact enclosures.
Relay Driver	Voltage Regulator Pass Element
Use Scenario: Driving 12 V/24 V electromagnetic relays with coil currents up to 800 mA in PLC I/O modules. IC Role / Device Role / Timing Role: Saturated switch interfacing microcontroller GPIO to inductive relay coils. Use Value: Fast turn-off t_f = 70 ns and low leakage I_OB ≤ −1 μA prevent relay chatter during logic transitions.	Use Scenario: Series pass transistor in adjustable linear regulators delivering up to 750 mA at 5–12 V output. IC Role / Device Role / Timing Role: Linearly biased NPN element dissipating regulated power between input and output. Use Value: h_FE linearity and V_CE(sat) stability ensure consistent dropout voltage and load regulation across temperature.

Audio Power Amplifier

DC Motor Driver

Use Scenario: Output stage in 5–10 W Class AB audio amplifiers for consumer speakers and instrument preamps.

IC Role / Device Role / Timing Role: NPN power switch amplifying line-level signals to drive 4–8 Ω speaker loads.

Use Value: V_CEO = −100 V provides 2× safety margin over ±35 V rails; h_FE ≥ 60 ensures stable quiescent current setting.

Use Scenario: H-bridge low-side switch controlling brushed DC motors in robotics and HVAC actuators.

IC Role / Device Role / Timing Role: Medium-current NPN switch sinking up to 1 A motor current under PWM control.

Use Value: V_CE(sat) ≤ −0.4 V limits conduction loss to <0.4 W at 1 A, reducing thermal load in compact enclosures.

Relay Driver

Voltage Regulator Pass Element

Use Scenario: Driving 12 V/24 V electromagnetic relays with coil currents up to 800 mA in PLC I/O modules.

IC Role / Device Role / Timing Role: Saturated switch interfacing microcontroller GPIO to inductive relay coils.

Use Value: Fast turn-off t_f = 70 ns and low leakage I_OB ≤ −1 μA prevent relay chatter during logic transitions.

Use Scenario: Series pass transistor in adjustable linear regulators delivering up to 750 mA at 5–12 V output.

IC Role / Device Role / Timing Role: Linearly biased NPN element dissipating regulated power between input and output.

Use Value: h_FE linearity and V_CE(sat) stability ensure consistent dropout voltage and load regulation across temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SD882	V_CEO = −30 V, I_C = −3 A, P_C = 1.25 W, TO-126	Limited to ≤24 V systems; higher current but lower voltage margin than 2SD600KF	Select when higher I_C is needed and supply voltage remains ≤24 V.
MJD122	V_CEO = −100 V, I_C = −8 A, P_C = 15 W, TO-220	Higher power and current capability; larger footprint and different thermal mounting	Choose for >1 A continuous loads or when TO-220 heatsinking infrastructure exists.

Compared with 2SD882 and MJD122, the 2SD600KF offers optimal balance of 100 V breakdown, 1 A rating, and TO-126 form factor for space-constrained 48 V industrial interfaces where moderate power and proven reliability are prioritized over extreme current or thermal capacity.

Availability

2SD600KF is available at Aetrix Electronics and suitable for audio power amplifiers, relay drivers, DC motor controllers, and linear voltage regulators requiring stable component supply and long-term industrial availability.

Supply support for 2SD600KF 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The 2SD600KF belongs to onsemi's legacy bipolar power transistor family designed specifically for robust, cost-effective linear amplification and switching in industrial controls, audio equipment, and power management subsystems.

FAQ

What is the maximum collector-emitter voltage rating for the 2SD600KF?

The 2SD600KF has a maximum collector-emitter voltage rating (V_CEO) of −100 V at T_a = 25 °C with base open. This rating is confirmed in the Absolute Maximum Ratings table of the official onsemi datasheet (Publication Order Number 2SB631_2SB631K_2SD600_2SD600K/D, Rev. 0). Exceeding this voltage risks avalanche breakdown and permanent device failure. Derating is required above 25 °C ambient.

Does the 2SD600KF have a specified hFE range, and how is it binned?

Yes, the 2SD600KF is binned by DC current gain: Rank D (h_FE = 60–120), Rank E (h_FE = 120–240), and Rank F (h_FE = 200–360) at V_CE = −5 V and I_C = −50 mA. The "KF" suffix corresponds to Rank F. This binning is documented in the Electrical Characteristics table and ensures predictable biasing in production amplifier designs using the 2SD600KF.

Can the 2SD600KF be used in switching applications, and what are its key timing parameters?

Yes, the 2SD600KF supports switching applications with t_on = 100 ns, t_off = 700 ns, and t_f = 70 ns (measured at I_C = −500 mA, V_CE = −12 V, R_B1 = 100 Ω, R_B2 = 24 Ω). These values are specified in the Switching Time Test Circuit section of the onsemi datasheet. While not optimized for high-frequency SMPS, the 2SD600KF performs reliably in <100 kHz relay and motor drive switching.

What package type does the 2SD600KF use, and is it insulated from the heatsink?

The 2SD600KF uses a TO-126 plastic package with a metal collector tab. The collector is internally connected to the tab, so electrical isolation from the heatsink requires a mica insulator and silicone grease-exactly as shown in the Thermal Resistance Diagram (ITR08286) of the onsemi datasheet. Mounting without insulation creates a short between collector and chassis ground.

Is the 2SD600KF RoHS compliant and lead-free?

Yes, the 2SD600KF is RoHS compliant and lead-free. This is confirmed by onsemi's product change notifications and packaging markings referenced in Publication Order Number 2SB631_2SB631K_2SD600_2SD600K/D. The device meets EU Directive 2011/65/EU and is manufactured using lead-free solder plating and halogen-free molding compound, making it suitable for modern environmental compliance requirements.

2SD600KF Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 1 A

Voltage - Collector Emitter Breakdown (Max):: 120 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 50mA, 500mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 160 @ 50mA, 5V

Power - Max:: 1 W

Frequency - Transition:: 130MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-126

2SD600KF FAQ

1.How can I place an order for 2SD600KF through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD600KF 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 2SD600KF reliable?

The price and inventory of 2SD600KF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SD600KF is usually 5 days.

3.What payment methods are accepted for 2SD600KF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD600KF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD600KF?

2SD600KF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD600KF 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 2SD600KF?

For technical support, including 2SD600KF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD600KF requirements.

6.How does Aetrix verify that 2SD600KF is sourced from the original manufacturer or authorized distributors?

All 2SD600KF 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 2SD600KF meets industry standards.

7.What is the process for return or replacement of 2SD600KF?

All 2SD600KF units undergo pre-shipment inspection (PSI). If there is an issue with 2SD600KF, 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 2SD600KF part is unused and in its original packaging.

Return procedure for 2SD600KF:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…