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

onsemi 2SC4489S-AN

Name: 2SC4489S-AN
Brand: onsemi
SKU: 2SC4489S-AN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC4489S-AN

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SC-71

Datasheet:: 2SC4489S-AN.pdf

Description:: TRANS NPN 100V 2A 3-NMP

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Product details

Overview

2SC4489S-AN from onsemi is an NPN bipolar junction transistor (BJT) designed for high-voltage switching applications, featuring V_CEO = 100 V, I_C = 2 A, f_T = 120 MHz, V_CE(sat) = 0.13 V (typ) at I_C = 1 A / I_B = 100 mA, and h_FE = 140–280 (Rank S). It is used in DC-DC converters, relay drivers, and motor control stages where low saturation voltage and fast switching are critical.

For engineers reviewing the 2SC4489S-AN datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, JEITA SC-71 package mapping, terminal roles, real-world use cases, and two validated alternative transistors with documented functional and application-level differences.

Technical Context

The 2SC4489S-AN employs FBET and MBIT fabrication processes to achieve high breakdown voltage and low V_CE(sat). Its f_T of 120 MHz supports medium-frequency switching up to ~50 MHz in practical designs, and its Cob = 16 pF (typ) at V_CB = –10 V enables stable operation in inductive load circuits.

It operates within T_j = 150 °C max and T_stg = –55 to +150 °C, with P_C = 1 W at T_a = 25 °C. The device is rated for pulsed collector current I_CP = 3 A, supporting short-duration surge handling in power interface stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Supports operation in 48 V and 60 V bus systems with margin against transient overvoltage.
I_C	2 A continuous - Suitable for driving small solenoids, fans, or logic-level MOSFET gates in industrial controls.
f_T	120 MHz - Enables clean switching in PWM frequencies up to 2–5 MHz with minimal phase lag.
V_CE(sat)	0.13 V (typ) at I_C/I_B = 10 - Reduces conduction loss to <130 mW at 1 A, improving thermal efficiency.
h_FE	140–280 (Rank S) - Ensures predictable base drive requirements across production lots without redesign.
C_ob	16 pF at V_CB = –10 V - Limits Miller effect in high-speed switching, easing gate driver selection.
t_on/t_f	80 ns / 40 ns - Supports sub-100 ns switching transitions, suitable for synchronous rectifier auxiliary switches.

Pinout & Package

Package: NMP(Taping), JEITA/IEC standard SC-71 (equivalent to SOT-323), surface-mount, 3-terminal plastic case. Dimensions: 2.54 mm × 1.45 mm × 0.9 mm (L×W×H), mass = 0.275 g.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit path; connected to ground or low-side return in common-emitter configurations.
2	Collector	High-current output node; ties to load or supply rail; thermally coupled to package backside.
3	Base	Control input; requires current-limited drive (e.g., 100 mA max for 1 A I_C) to ensure saturation.

Key Features

Feature	Design Value
Low V_CE(sat)	0.13 V (typ) enables <130 mW conduction loss at 1 A - reduces heatsink need in space-constrained PCBs.
High f_T	120 MHz gain-bandwidth allows stable amplification or switching up to 5 MHz without compensation.
Robust V_CEO	100 V rating supports 48 V industrial buses with ≥2× safety margin against line transients.
Fast switching	80 ns turn-on and 40 ns fall time enable efficient PWM control in DC-DC and motor drivers.
SC-71 package	Standardized JEITA SC-71 footprint ensures compatibility with automated placement and reflow profiles.

Applications

DC-DC Converter Switch	Relay Driver Stage
Use Scenario: High-efficiency buck converter secondary-side switch operating at 500 kHz–2 MHz with 24–48 V input. IC Role / Device Role / Timing Role: NPN switching transistor controlling energy transfer via inductor; driven by PWM controller's open-drain output. Use Value: Low V_CE(sat) minimizes conduction loss; fast t_f reduces switching tail losses and EMI generation.	Use Scenario: Solid-state replacement for electromechanical relays in PLC I/O modules, switching 24 V DC loads up to 1.5 A. IC Role / Device Role / Timing Role: Low-side load switch interfacing microcontroller GPIO to inductive relay coil. Use Value: 100 V V_CEO withstands coil flyback spikes; h_FE range ensures reliable saturation with 5 mA base drive.
Motor Control Interface	LED Constant-Current Sink
Use Scenario: H-bridge half-bridge leg driver for 12 V brushed DC motors in robotics or HVAC actuators. IC Role / Device Role / Timing Role: NPN transistor in emitter-follower or common-emitter configuration controlling motor direction and speed. Use Value: 2 A I_C supports peak stall currents; fast t_on/t_f enables precise PWM duty-cycle control without shoot-through risk.	Use Scenario: Precision current sink for high-brightness LED strings in signage or industrial lighting, regulated at 350–700 mA. IC Role / Device Role / Timing Role: Linear-mode BJT operating in active region with feedback-controlled base bias. Use Value: Tight h_FE bin (Rank S) ensures consistent current regulation across temperature; low V_CE(sat) preserves headroom for sense resistor.

DC-DC Converter Switch

Relay Driver Stage

Use Scenario: High-efficiency buck converter secondary-side switch operating at 500 kHz–2 MHz with 24–48 V input.

IC Role / Device Role / Timing Role: NPN switching transistor controlling energy transfer via inductor; driven by PWM controller's open-drain output.

Use Value: Low V_CE(sat) minimizes conduction loss; fast t_f reduces switching tail losses and EMI generation.

Use Scenario: Solid-state replacement for electromechanical relays in PLC I/O modules, switching 24 V DC loads up to 1.5 A.

IC Role / Device Role / Timing Role: Low-side load switch interfacing microcontroller GPIO to inductive relay coil.

Use Value: 100 V V_CEO withstands coil flyback spikes; h_FE range ensures reliable saturation with 5 mA base drive.

Motor Control Interface

LED Constant-Current Sink

Use Scenario: H-bridge half-bridge leg driver for 12 V brushed DC motors in robotics or HVAC actuators.

IC Role / Device Role / Timing Role: NPN transistor in emitter-follower or common-emitter configuration controlling motor direction and speed.

Use Value: 2 A I_C supports peak stall currents; fast t_on/t_f enables precise PWM duty-cycle control without shoot-through risk.

Use Scenario: Precision current sink for high-brightness LED strings in signage or industrial lighting, regulated at 350–700 mA.

IC Role / Device Role / Timing Role: Linear-mode BJT operating in active region with feedback-controlled base bias.

Use Value: Tight h_FE bin (Rank S) ensures consistent current regulation across temperature; low V_CE(sat) preserves headroom for sense resistor.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC4489T-AN	Same package and absolute ratings; h_FE = 200–400 (Rank T), higher gain but wider spread.	Preferred where lower base drive current is needed (e.g., weak MCU outputs); less predictable at low I_C.	Select 2SC4489T-AN when base drive is limited and gain consistency at low current is not critical.
MMBT4401LT1G	V_CEO = 40 V, I_C = 600 mA, f_T = 250 MHz, SOT-23 package - smaller, faster, but lower voltage/current capability.	Suitable only for ≤24 V, <0.5 A applications; not a drop-in replacement due to reduced voltage margin and power handling.	Choose MMBT4401LT1G only for low-power, high-frequency signal switching where 100 V rating is unnecessary.

Compared with 2SC4489S-AN, the 2SC4489T-AN offers higher h_FE at the cost of tighter layout sensitivity to base resistance, while MMBT4401LT1G trades voltage robustness and current capacity for speed and footprint reduction - neither is pin-compatible nor electrically interchangeable without circuit review.

Availability

2SC4489S-AN is available at Aetrix Electronics and suitable for DC-DC converters, relay drivers, and motor interface circuits requiring stable component supply, consistent h_FE binning, and 100 V switching capability.

Supply support for 2SC4489S-AN 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 innovation, serving automotive, industrial, cloud, and IoT markets with discrete, analog, and power management solutions.

The 2SC4489S-AN belongs to onsemi's general-purpose high-voltage NPN transistor family, engineered for reliability in industrial power interfaces where breakdown margin, saturation performance, and thermal stability are prioritized over ultra-high speed.

FAQ

What is the maximum continuous collector current for the 2SC4489S-AN?

The 2SC4489S-AN has a maximum continuous collector current I_C of 2 A at T_a = 25 °C. Derating applies above 25 °C per the PC–Ta curve; at 75 °C ambient, usable I_C drops to approximately 1.3 A to maintain P_C ≤ 1 W. This rating assumes adequate PCB copper area for heat dissipation, as the SC-71 package relies on board thermal conduction.

Is the 2SC4489S-AN RoHS-compliant and lead-free?

Yes, the 2SC4489S-AN is Pb-free and RoHS-compliant, as confirmed in the ordering information section of the official datasheet (Ordering number EN3096A, "Pb Free" memo). The device meets EU Directive 2011/65/EU and is marked accordingly in tape-and-reel packaging.

How does the h_FE ranking (S vs T) affect circuit design for the 2SC4489S-AN?

The 2SC4489S-AN is binned to h_FE = 140–280 (Rank S), providing tighter gain control than Rank T (200–400). This makes 2SC4489S-AN preferable in designs where base drive current must be precisely budgeted - for example, when using a fixed 4.7 kΩ base resistor from a 5 V MCU GPIO - ensuring guaranteed saturation across all units without overdesigning the driver stage.

Can the 2SC4489S-AN replace the 2SC4489T-AN without circuit changes?

No - while both share identical package, voltage, and current ratings, the 2SC4489S-AN and 2SC4489T-AN differ in h_FE binning (S: 140–280, T: 200–400). Substituting one for the other may cause marginal saturation in low-base-drive circuits or excessive base current in high-gain-sensitive layouts. Circuit validation is required before interchange.

What is the typical Cob value of the 2SC4489S-AN and why does it matter?

The 2SC4489S-AN has a typical output capacitance C_ob of 16 pF at V_CB = –10 V and f = 1 MHz. This parameter directly impacts switching speed and Miller-effect-induced delay during turn-off. Lower C_ob reduces gate driver loading in cascode or Darlington configurations and improves EMI behavior in high-dV/dt environments like motor drives.

2SC4489S-AN Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-71

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 2 A

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 100mA, 1A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 140 @ 100mA, 5V

Power - Max:: 1 W

Frequency - Transition:: 120MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-NMP

2SC4489S-AN FAQ

1.How can I place an order for 2SC4489S-AN through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC4489S-AN 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 2SC4489S-AN reliable?

The price and inventory of 2SC4489S-AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC4489S-AN is usually 5 days.

3.What payment methods are accepted for 2SC4489S-AN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC4489S-AN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC4489S-AN?

2SC4489S-AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC4489S-AN 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 2SC4489S-AN?

For technical support, including 2SC4489S-AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC4489S-AN requirements.

6.How does Aetrix verify that 2SC4489S-AN is sourced from the original manufacturer or authorized distributors?

All 2SC4489S-AN 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 2SC4489S-AN meets industry standards.

7.What is the process for return or replacement of 2SC4489S-AN?

All 2SC4489S-AN units undergo pre-shipment inspection (PSI). If there is an issue with 2SC4489S-AN, 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 2SC4489S-AN part is unused and in its original packaging.

Return procedure for 2SC4489S-AN:

1.Submit a request within 90 days.

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

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