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

onsemi 2N5087TF

Name: 2N5087TF
Brand: onsemi
SKU: 2N5087TF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N5087TF

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: 2N5087TF.pdf

Description:: TRANS PNP 50V 0.1A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2N5087TF from ON Semiconductor (formerly Fairchild) is a PNP general-purpose amplifier transistor optimized for low-level, high-gain, low-noise signal amplification at collector currents up to 50 mA. It features V_CEO = −50 V, h_FE = 250 (at I_C = −1.0 mA), f_T = 40 MHz, V_CE(sat) = −0.3 V (at I_C = −10 mA), and noise figure as low as 2.0 dB - enabling precision audio preamplifier and sensor interface applications.

For engineers reviewing the 2N5087TF datasheet, pinout, applications, or equivalent options, this device is selected for low-noise analog front-ends where gain stability across −40°C to +125°C, tight h_FE distribution, and minimal input-referred noise are critical design requirements.

Technical Context

The 2N5087TF operates as a silicon PNP bipolar junction transistor in common-emitter configuration, with base-controlled current amplification and linear small-signal behavior validated down to I_C = −100 µA. Its f_T of 40 MHz and h_fe ≥ 250 at 1 kHz confirm suitability for audio-frequency amplification and low-speed signal conditioning.

Thermal performance is defined for FR-4 PCB mounting: R_θJA = 357°C/W (SOT-23 package), enabling operation up to +150°C junction temperature. The −3.0 V V_EBO rating and 4.0 pF C_cb support stable biasing in high-impedance emitter-follower or cascode topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V - Supports rail-to-rail operation in negative-supply analog stages up to ±50 V differential.
h_FE	250 (min) at I_C = −1.0 mA - Ensures predictable DC bias stability in high-gain amplifier designs.
f_T	40 MHz - Enables faithful amplification of audio and sub-MHz sensor signals without phase distortion.
V_CE(sat)	−0.3 V at I_C = −10 mA - Minimizes voltage headroom loss in saturated-switch or active-load configurations.
NF	2.0 dB at I_C = −20 µA, R_S = 10 kΩ - Delivers ultra-low input-referred noise for microphone and thermopile preamps.
C_cb	4.0 pF at V_CB = −5.0 V - Limits Miller effect in wideband gain stages, preserving bandwidth integrity.
P_D	350 mW (SOT-23) - Sustains continuous operation at I_C ≤ −50 mA with proper PCB copper area.

Pinout & Package

2N5087TF is supplied in the SOT-23 surface-mount package (marking: "2Q"), with standardized lead assignment per JEDEC TO-236AB: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input node	Accepts reverse-biased drive current to modulate collector current; requires ≤ −3.0 V V_EBO compliance.
2 (Emitter)	Common terminal for PNP operation	Connected to most-positive supply rail in typical CE amplifier; sets reference for V_BE(on) = −0.85 V.
3 (Collector)	Output current sink	Delivers amplified reverse current to load; rated for −50 V V_CBO and −100 mA continuous I_C.

Key Features

Feature	Design Value
Low-noise amplification	2.0 dB NF at 10 Hz–15.7 kHz enables high-SNR audio and precision sensor front-ends.
High DC current gain	h_FE ≥ 250 ensures stable bias points in discrete gain blocks without feedback trimming.
Wide operating temperature	Junction range −55°C to +150°C supports automotive under-hood and industrial control environments.
Small-signal linearity	h_fe = 250–900 across I_C = −100 µA to −10 mA maintains consistent gain in variable-signal applications.
Low saturation voltage	V_CE(sat) = −0.3 V reduces power loss and improves efficiency in active-load and switching regulator roles.

Applications

Audio Preamp Stage	Temperature Sensor Interface
Use Scenario: Amplifying weak output from electret condenser microphones in battery-powered voice recorders. IC Role / Device Role / Timing Role: PNP transconductance amplifier providing 40 dB voltage gain with <2.5 dB THD+N at 1 kHz. Use Value: 2.0 dB noise figure and −0.85 V V_BE(on) enable clean signal capture at supply voltages as low as −3.3 V.	Use Scenario: Conditioning output from silicon bandgap temperature sensors in HVAC control modules. IC Role / Device Role / Timing Role: High-input-impedance current amplifier converting sensor current to stable voltage with minimal self-heating. Use Value: h_FE ≥ 250 and −50 nA I_CBO ensure measurement drift <0.1°C over −40°C to +85°C ambient.
Low-Voltage Logic Level Shifter	Discrete Op-Amp Input Pair
Use Scenario: Translating 0/−1.8 V logic from legacy industrial controllers to −5 V TTL-compatible inputs. IC Role / Device Role / Timing Role: Saturated PNP switch with fast turn-off (t_f < 150 ns) and guaranteed −0.3 V V_CE(sat). Use Value: 40 MHz f_T and 4.0 pF C_cb support reliable 100 kHz switching with <5% duty-cycle distortion.	Use Scenario: Building discrete instrumentation amplifiers for medical ECG front-ends requiring ultra-low 1/f noise. IC Role / Device Role / Timing Role: Matched PNP pair (with 2N5086TF) forming high-CMRR differential input stage. Use Value: Tight h_FE spread (250–500) and 2.0 dB NF at 10 Hz enable <0.5 µVpp input-referred noise in 0.05–150 Hz band.

Audio Preamp Stage

Temperature Sensor Interface

Use Scenario: Amplifying weak output from electret condenser microphones in battery-powered voice recorders.

IC Role / Device Role / Timing Role: PNP transconductance amplifier providing 40 dB voltage gain with <2.5 dB THD+N at 1 kHz.

Use Value: 2.0 dB noise figure and −0.85 V V_BE(on) enable clean signal capture at supply voltages as low as −3.3 V.

Use Scenario: Conditioning output from silicon bandgap temperature sensors in HVAC control modules.

IC Role / Device Role / Timing Role: High-input-impedance current amplifier converting sensor current to stable voltage with minimal self-heating.

Use Value: h_FE ≥ 250 and −50 nA I_CBO ensure measurement drift <0.1°C over −40°C to +85°C ambient.

Low-Voltage Logic Level Shifter

Discrete Op-Amp Input Pair

Use Scenario: Translating 0/−1.8 V logic from legacy industrial controllers to −5 V TTL-compatible inputs.

IC Role / Device Role / Timing Role: Saturated PNP switch with fast turn-off (t_f < 150 ns) and guaranteed −0.3 V V_CE(sat).

Use Value: 40 MHz f_T and 4.0 pF C_cb support reliable 100 kHz switching with <5% duty-cycle distortion.

Use Scenario: Building discrete instrumentation amplifiers for medical ECG front-ends requiring ultra-low 1/f noise.

IC Role / Device Role / Timing Role: Matched PNP pair (with 2N5086TF) forming high-CMRR differential input stage.

Use Value: Tight h_FE spread (250–500) and 2.0 dB NF at 10 Hz enable <0.5 µVpp input-referred noise in 0.05–150 Hz band.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT5087	Same die, SOT-23 package, identical electrical specs; marked "2Q" like 2N5087TF.	No functional difference; MMBT5087 is the industry-standard SOT-23 designation for this die.	Select MMBT5087 when standard JEDEC SOT-23 footprint and marking consistency are required.
2N5086TF	Same package and pinout; h_FE = 150 (min) vs. 250 (min) - lower gain, tighter h_FE tolerance.	Better suited for applications needing predictable mid-gain (150–300) with reduced variation across temperature.	Choose 2N5086TF where gain linearity and thermal stability outweigh maximum gain requirement.

Compared with MMBT5087 and 2N5086TF, the 2N5087TF delivers the highest guaranteed h_FE (250 min) in the family while maintaining identical noise, speed, and voltage ratings - making it optimal for gain-critical, low-noise analog stages where margin matters.

Availability

2N5087TF is available at Aetrix Electronics and suitable for audio preamplifiers, temperature sensor interfaces, and discrete op-amp input stages requiring stable component supply, traceable lot history, and long-term industrial lifecycle support.

Supply support for 2N5087TF 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

ON Semiconductor (formerly Fairchild Semiconductor) is a global supplier of energy-efficient semiconductor solutions, specializing in analog, power management, and signal processing components for automotive, industrial, and consumer markets.

The 2N5087TF belongs to the FACT Quiet Series™ PNP amplifier family, engineered specifically for low-noise, high-gain analog signal conditioning in space-constrained PCB layouts.

FAQ

What is the maximum collector current rating for the 2N5087TF?

The 2N5087TF has a continuous collector current rating of −100 mA, verified per Absolute Maximum Ratings in the Fairchild/ON Semiconductor datasheet. This rating applies at T_A = 25°C with derating above that temperature. For sustained operation at −50 mA, the SOT-23 package requires adequate PCB copper area to maintain junction temperature below +150°C.

Does the 2N5087TF have the same pinout as the 2N5086TF?

Yes, the 2N5087TF and 2N5086TF share identical SOT-23 pinout: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. Both devices use the "2Q" top-side marking and match mechanical dimensions per Fairchild Package Dimensions Rev. B1. This allows direct substitution in layout when gain requirements permit.

What is the typical noise figure of the 2N5087TF at low frequencies?

The 2N5087TF achieves a typical noise figure of 2.0 dB at I_C = −20 µA, R_S = 10 kΩ, and frequency range 10 Hz to 15.7 kHz. This value is confirmed in the "Noise Figure" section of the datasheet and reflects its optimization for low-frequency sensor and audio applications where 1/f noise dominates.

Can the 2N5087TF be used in surface-mount reflow processes?

Yes, the 2N5087TF in SOT-23 package is qualified for standard lead-free reflow soldering per J-STD-020. Peak temperature must not exceed 260°C for ≤ 30 seconds. Thermal resistance data (R_θJA = 357°C/W) assumes JEDEC-standard FR-4 board layout with 1.6" × 1.6" copper pad - verify thermal relief design for your specific assembly process.

How does the h_FE of the 2N5087TF compare to the MMBT5087?

The 2N5087TF and MMBT5087 are electrically identical: both specify h_FE = 250 (min) at I_C = −1.0 mA and V_CE = −5.0 V. They share the same die, SOT-23 package, and "2Q" marking. The MMBT5087 is the standardized JEDEC designation; 2N5087TF is the legacy Fairchild/ON Semiconductor orderable part number for the same device.

2N5087TF Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 50 V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 1mA, 10mA

Current - Collector Cutoff (Max):: 50nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 250 @ 100µA, 5V

Power - Max:: 625 mW

Frequency - Transition:: 40MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

2N5087TF FAQ

1.How can I place an order for 2N5087TF through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N5087TF 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 2N5087TF reliable?

The price and inventory of 2N5087TF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N5087TF is usually 5 days.

3.What payment methods are accepted for 2N5087TF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N5087TF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N5087TF?

2N5087TF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N5087TF 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 2N5087TF?

For technical support, including 2N5087TF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N5087TF requirements.

6.How does Aetrix verify that 2N5087TF is sourced from the original manufacturer or authorized distributors?

All 2N5087TF 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 2N5087TF meets industry standards.

7.What is the process for return or replacement of 2N5087TF?

All 2N5087TF units undergo pre-shipment inspection (PSI). If there is an issue with 2N5087TF, 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 2N5087TF part is unused and in its original packaging.

Return procedure for 2N5087TF:

1.Submit a request within 90 days.

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

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