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

onsemi 2N5089RLRA

Name: 2N5089RLRA
Brand: onsemi
SKU: 2N5089RLRA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N5089RLRA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 Long Body, Formed Leads

Datasheet:: 2N5089RLRA.pdf

Description:: TRANS NPN 25V 0.05A TO92

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2N5089RLRA from onsemi is an NPN silicon small-signal amplifier transistor in TO-92 package, rated for V_CEO = 25 V, I_C = 50 mA, and h_FE = 400–1200 (at I_C = 1.0–10 mA), optimized for low-noise audio preamplifier stages in consumer and industrial electronics.

For engineers reviewing the 2N5089RLRA datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.0 dB noise figure at 1 kHz, f_T = 50 MHz, V_CE(sat) ≤ 0.5 V, and Pb-free TO-92 packaging suitable for high-fidelity analog signal conditioning.

Technical Context

This discrete NPN bipolar junction transistor operates in linear amplification mode with base-emitter forward bias and collector-emitter voltage swing limited to 25 V. Its design emphasizes low-noise performance (NF = 2.0 dB) and high current gain across 100 µA–10 mA collector currents.

The device exhibits f_T = 50 MHz at I_C = 500 µA and V_CE = 5 V, with C_cb = 4.0 pF and C_eb = 10 pF, enabling stable operation up to mid-VHF frequencies while maintaining predictable h_fe response (450–1800) across 1–100 kHz signal bands.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	25 Vdc - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration.
I_C (continuous)	50 mAdc - Continuous collector current rating defining linear operating headroom for Class-A amplifiers.
h_FE range	400–1200 - DC current gain variation across 1.0–10 mA I_C, supporting consistent biasing in low-current gain-stable circuits.
NF	2.0 dB @ 1 kHz - Low-noise figure enabling high-SNR preamplification of weak audio or sensor signals.
f_T	50 MHz - Unity-gain bandwidth confirming suitability for wideband analog signal amplification up to ~5 MHz usable bandwidth.
P_D @ T_A = 25°C	625 mW - Power dissipation limit defining thermal derating requirements for PCB layout and heatsinking.
R_JA	200 °C/W - Junction-to-ambient thermal resistance indicating need for adequate copper area or airflow in ambient >40°C environments.

Pinout & Package

2N5089RLRA uses the standard TO-92 (Case 29-11) plastic package with 3 leads, lead-free plating, and JEDEC-compliant mechanical dimensions (A = 4.45–5.20 mm, B = 4.32–5.33 mm, C = 3.18–4.19 mm).

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current sink terminal; connected to ground or bias network in common-emitter amplifier configurations.
2	Base	Control input; requires ~0.7 V forward bias and microampere-level drive current for linear amplification.
3	Collector	Current source output; supplies amplified signal to load resistor or next stage with V_CE(sat) ≤ 0.5 V under 10 mA drive.

Key Features

Feature	Design Value
Low-noise operation	NF = 2.0 dB at 1 kHz enables high-fidelity amplification of microphone or piezoelectric sensor outputs without added signal degradation.
High DC current gain	h_FE ≥ 400 at I_C = 1.0 mA supports stable biasing with minimal base current, reducing loading on preceding stages.
Pb-free TO-92 packaging	RoHS-compliant construction meets modern environmental regulations and eliminates lead-based solder compatibility concerns.
Wide f_T bandwidth	50 MHz f_T ensures flat small-signal gain response through audio and sub-MHz instrumentation frequency ranges.

Applications

Audio Preamp Stage	Instrumentation Signal Conditioning
Use Scenario: Amplifying low-level signals from electret condenser microphones in voice recorders or intercom systems. IC Role / Device Role / Timing Role: Discrete NPN amplifier providing 20–40 dB voltage gain with minimal added noise in first-stage signal chain. Use Value: 2.0 dB NF and h_FE ≥ 400 ensure clean signal capture without requiring complex feedback networks or external noise filtering.	Use Scenario: Boosting millivolt-level outputs from thermocouples or strain gauges in industrial monitoring equipment. IC Role / Device Role / Timing Role: Linear transconductance amplifier converting sensor current into stable voltage output with high input impedance. Use Value: Low V_BE(on) (≤ 0.8 V) and tight h_FE distribution enable accurate, temperature-stable gain calibration across production units.
RF Detector Biasing	Low-Power Oscillator Core
Use Scenario: Providing active bias current to Schottky diode RF detectors in AM/FM receiver front-ends. IC Role / Device Role / Timing Role: Constant-current source delivering precise 100–500 µA to detector diodes via emitter-follower configuration. Use Value: Stable h_FE and low C_eb (10 pF) prevent detuning of LC tank circuits while maintaining detector sensitivity.	Use Scenario: Serving as the active element in Colpitts or Hartley oscillator designs for local clock generation in embedded sensors. IC Role / Device Role / Timing Role: Gain block sustaining oscillation at 1–10 MHz with predictable phase margin and startup reliability. Use Value: 50 MHz f_T and low C_cb (4.0 pF) support stable oscillation without excessive external compensation components.

Audio Preamp Stage

Instrumentation Signal Conditioning

Use Scenario: Amplifying low-level signals from electret condenser microphones in voice recorders or intercom systems.

IC Role / Device Role / Timing Role: Discrete NPN amplifier providing 20–40 dB voltage gain with minimal added noise in first-stage signal chain.

Use Value: 2.0 dB NF and h_FE ≥ 400 ensure clean signal capture without requiring complex feedback networks or external noise filtering.

Use Scenario: Boosting millivolt-level outputs from thermocouples or strain gauges in industrial monitoring equipment.

IC Role / Device Role / Timing Role: Linear transconductance amplifier converting sensor current into stable voltage output with high input impedance.

Use Value: Low V_BE(on) (≤ 0.8 V) and tight h_FE distribution enable accurate, temperature-stable gain calibration across production units.

RF Detector Biasing

Low-Power Oscillator Core

Use Scenario: Providing active bias current to Schottky diode RF detectors in AM/FM receiver front-ends.

IC Role / Device Role / Timing Role: Constant-current source delivering precise 100–500 µA to detector diodes via emitter-follower configuration.

Use Value: Stable h_FE and low C_eb (10 pF) prevent detuning of LC tank circuits while maintaining detector sensitivity.

Use Scenario: Serving as the active element in Colpitts or Hartley oscillator designs for local clock generation in embedded sensors.

IC Role / Device Role / Timing Role: Gain block sustaining oscillation at 1–10 MHz with predictable phase margin and startup reliability.

Use Value: 50 MHz f_T and low C_cb (4.0 pF) support stable oscillation without excessive external compensation components.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN small-signal amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2N5088RLRA	V_CEO = 30 V (vs. 25 V), h_FE min = 300 at I_C = 10 mA, NF = 3.0 dB (vs. 2.0 dB)	Higher voltage headroom but higher noise; less optimal for ultra-low-noise preamps	Select when circuit requires >25 V collector swing and noise performance is secondary
BC548C	V_CEO = 30 V, h_FE = 420–800, NF = 4.0 dB, TO-92 package, non-Pb-free default	Lower gain consistency and higher noise; wider h_FE spread increases production calibration effort	Choose only if legacy inventory or cost constraints override noise and gain stability requirements

Compared with 2N5089RLRA, the 2N5088RLRA offers higher voltage tolerance but sacrifices noise performance, while the BC548C trades off both noise figure and h_FE consistency for broader availability-making 2N5089RLRA the preferred choice for precision low-noise analog gain where V_CEO ≤ 25 V suffices.

Availability

2N5089RLRA is available at Aetrix Electronics and suitable for audio preamplifiers, instrumentation signal chains, RF detector biasing, and low-power oscillator circuits requiring stable component supply and RoHS-compliant packaging.

Supply support for 2N5089RLRA 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 management, analog, and sensing solutions for automotive, industrial, and cloud infrastructure markets.

The 2N5089RLRA belongs to onsemi's legacy NPN amplifier transistor family designed specifically for high-fidelity, low-noise analog signal amplification in cost-sensitive consumer and industrial electronics.

FAQ

What is the maximum collector-emitter voltage rating for the 2N5089RLRA?

The 2N5089RLRA has a maximum collector-emitter voltage (V_CEO) rating of 25 Vdc, verified per onsemi's official datasheet revision 3 (March 2006). This rating applies under standard test conditions (I_C = 1.0 mAdc, I_B = 0) and defines the absolute upper limit for safe operation in common-emitter amplifier configurations. Exceeding this voltage risks avalanche breakdown and permanent device damage.

Does the 2N5089RLRA have Pb-free construction?

Yes, the 2N5089RLRA features Pb-free construction, confirmed by its "RLRA" suffix and explicit marking in onsemi's ordering information table. The "R" denotes tape-and-reel packaging, "L" indicates Pb-free finish, and "A" specifies assembly location. This complies with RoHS Directive 2011/65/EU and eliminates lead-based solder compatibility concerns in modern SMT assembly processes.

What is the typical noise figure of the 2N5089RLRA and under what conditions is it measured?

The 2N5089RLRA has a typical noise figure (NF) of 2.0 dB, measured at I_C = 100 µAdc, V_CE = 5.0 Vdc, R_S = 1.0 kΩ, and f = 1.0 kHz, as specified in the official onsemi datasheet. This value reflects its optimized low-noise performance for small-signal amplification, making the 2N5089RLRA particularly suitable for microphone preamplifiers and sensor interface circuits where signal integrity is critical.

What is the current-gain bandwidth product (f_T) of the 2N5089RLRA?

The 2N5089RLRA has a minimum current-gain bandwidth product (f_T) of 50 MHz, tested at I_C = 500 µAdc, V_CE = 5.0 Vdc, and f = 20 MHz. This parameter confirms the device's capability to maintain useful gain well into the VHF range, supporting stable amplification of signals up to approximately 5 MHz in practical common-emitter configurations with appropriate biasing and layout.

How is the pinout arranged on the 2N5089RLRA in TO-92 package?

When viewing the 2N5089RLRA's TO-92 package with the flat side facing outward and leads pointing downward, the pinout is: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector - matching the official marking diagram in onsemi's datasheet. This standardized arrangement ensures correct orientation during PCB layout and manual soldering, and is consistent across all 2N508x series devices in Case 29-11 packaging.

2N5089RLRA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 Long Body, Formed Leads

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 50 mA

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

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 1mA, 10mA

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 400 @ 100µA, 5V

Power - Max:: 625 mW

Frequency - Transition:: 50MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92 (TO-226)

2N5089RLRA FAQ

1.How can I place an order for 2N5089RLRA through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N5089RLRA 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 2N5089RLRA reliable?

The price and inventory of 2N5089RLRA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N5089RLRA is usually 5 days.

3.What payment methods are accepted for 2N5089RLRA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N5089RLRA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N5089RLRA?

2N5089RLRA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N5089RLRA 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 2N5089RLRA?

For technical support, including 2N5089RLRA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N5089RLRA requirements.

6.How does Aetrix verify that 2N5089RLRA is sourced from the original manufacturer or authorized distributors?

All 2N5089RLRA 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 2N5089RLRA meets industry standards.

7.What is the process for return or replacement of 2N5089RLRA?

All 2N5089RLRA units undergo pre-shipment inspection (PSI). If there is an issue with 2N5089RLRA, 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 2N5089RLRA part is unused and in its original packaging.

Return procedure for 2N5089RLRA:

1.Submit a request within 90 days.

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

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