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

onsemi 2N5401RLRM

Name: 2N5401RLRM
Brand: onsemi
SKU: 2N5401RLRM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N5401RLRM

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2N5401RLRM.pdf

Description:: TRANS PNP 150V 0.6A TO92

Quantity:: RFQ Add To RFQ list

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Inventory:5,522

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Product details

Overview

2N5401RLRM from onsemi is a PNP silicon small-signal amplifier transistor in TO-92 package, rated for V_CEO = 150 V, I_C = 600 mA, and P_D = 625 mW at T_A = 25°C. It delivers h_FE = 50–240 (at I_C = 1–50 mA), f_T = 300 MHz, and V_CE(sat) ≤ 0.5 V, supporting high-voltage switching and linear amplification in discrete analog stages.

For engineers reviewing the 2N5401RLRM datasheet, pinout, applications, or equivalent options, key selection criteria include its 150 V V_CEO, TO-92 leaded package with emitter-base-collector pinout, low noise figure (NF ≤ 8.0 dB), and compatibility with legacy through-hole bias networks in power supply control and audio preamp circuits.

Technical Context

The 2N5401RLRM operates as a general-purpose PNP bipolar junction transistor optimized for medium-voltage linear amplification and switching. Its V_CBO = 160 V and V_EBO = 5.0 V define safe reverse-bias limits, while thermal resistance R_JA = 200 °C/W confirms suitability for ambient-limited PCB layouts without forced cooling.

DC current gain varies with collector current and temperature: h_FE ≥ 50 at I_C = 1 mA and ≥ 40 at I_C = 50 mA (T_A = 25°C), and f_T = 300 MHz ensures usable bandwidth in RF-coupled preamplifier stages up to ~100 MHz with proper biasing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	150 V - Supports operation in 120 V AC-derived rails or flyback snubber circuits without breakdown.
I_C (continuous)	600 mA - Enables drive of moderate-current loads like relay coils or LED strings in discrete logic interfaces.
P_D @ T_A = 25°C	625 mW - Limits continuous dissipation in unheatsinked TO-92 mounting; derates 5 mW/°C above ambient.
h_FE	50–240 - Provides stable DC gain across 1–50 mA collector range, suitable for emitter-follower buffers and voltage regulators.
f_T	300 MHz - Allows use in VHF preamplifiers and broadband signal conditioning where gain-bandwidth trade-offs are critical.
V_CE(sat)	≤ 0.5 V @ I_C/I_B = 10 - Ensures low conduction loss in saturated-switch applications such as level-shifting or active clamping.

Pinout & Package

2N5401RLRM uses the standard TO-92 (Case 29-11) plastic package with 3 leads. Pin 1 is Emitter, Pin 2 is Base, Pin 3 is Collector - verified per onsemi marking diagram and package dimensions drawing.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal for PNP operation	Connected to higher-potential rail in common-base or common-collector configurations; defines reference for base-emitter bias.
2 (Base)	Control input for minority-carrier injection	Receives forward-biased current to modulate collector current; requires series resistor to limit I_B and prevent thermal runaway.
3 (Collector)	Output current terminal	Drains current toward ground or negative rail; supports up to 150 V reverse bias relative to emitter in cutoff.

Key Features

Feature	Design Value
High V_CEO rating	150 V enables direct interface with 100–120 VAC-derived supplies in offline power control and protection circuits.
Low noise figure	NF ≤ 8.0 dB at I_C = 250 µA makes it suitable for low-level audio and sensor signal amplification where SNR matters.
Wide h_FE range	50–240 across operating conditions allows robust bias design without tight binning in production assemblies.
TO-92 mechanical compatibility	Standard footprint supports drop-in replacement in legacy designs using 2N5400/2N5401 family footprints and tooling.

Applications

High-Voltage Switching	Discrete Audio Preamp
Use Scenario: Controlling 120 VAC-derived DC rails in isolated feedback paths of SMPS. IC Role / Device Role / Timing Role: PNP switch enabling optocoupler biasing and error amplifier pull-up in secondary-side regulation. Use Value: 150 V V_CEO prevents breakdown during transient overvoltage events on auxiliary windings.	Use Scenario: Low-noise microphone preamplifier stage in battery-powered recording equipment. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration for gain stability. Use Value: NF ≤ 8.0 dB preserves dynamic range when amplifying µV-level transducer outputs.
Linear Voltage Regulator	Relay Driver Interface
Use Scenario: Pass transistor in adjustable 3-terminal linear regulator delivering up to 500 mA load current. IC Role / Device Role / Timing Role: Series pass element controlled by op-amp error amplifier in shunt-regulated topology. Use Value: 600 mA I_C and 625 mW P_D support 5–12 V output at full load with adequate heatsinking margin.	Use Scenario: Driving 12 V, 400 mA electromagnetic relay coil from microcontroller GPIO. IC Role / Device Role / Timing Role: Saturated PNP switch providing inverted logic-level interface with flyback diode protection. Use Value: V_CE(sat) ≤ 0.5 V minimizes power loss (≤200 mW) and self-heating during sustained coil activation.

High-Voltage Switching

Discrete Audio Preamp

Use Scenario: Controlling 120 VAC-derived DC rails in isolated feedback paths of SMPS.

IC Role / Device Role / Timing Role: PNP switch enabling optocoupler biasing and error amplifier pull-up in secondary-side regulation.

Use Value: 150 V V_CEO prevents breakdown during transient overvoltage events on auxiliary windings.

Use Scenario: Low-noise microphone preamplifier stage in battery-powered recording equipment.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration for gain stability.

Use Value: NF ≤ 8.0 dB preserves dynamic range when amplifying µV-level transducer outputs.

Linear Voltage Regulator

Relay Driver Interface

Use Scenario: Pass transistor in adjustable 3-terminal linear regulator delivering up to 500 mA load current.

IC Role / Device Role / Timing Role: Series pass element controlled by op-amp error amplifier in shunt-regulated topology.

Use Value: 600 mA I_C and 625 mW P_D support 5–12 V output at full load with adequate heatsinking margin.

Use Scenario: Driving 12 V, 400 mA electromagnetic relay coil from microcontroller GPIO.

IC Role / Device Role / Timing Role: Saturated PNP switch providing inverted logic-level interface with flyback diode protection.

Use Value: V_CE(sat) ≤ 0.5 V minimizes power loss (≤200 mW) and self-heating during sustained coil activation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPSA92	V_CEO = 300 V, h_FE = 25–200, f_T = 50 MHz - higher voltage rating but lower bandwidth.	Better suited for >200 V flyback snubbers; less optimal for VHF preamps due to reduced f_T.	Select MPSA92 when absolute breakdown margin exceeds 150 V, accepting trade-off in high-frequency gain.
BC557B	V_CEO = 45 V, h_FE = 200–450, P_D = 500 mW - lower voltage, higher gain, smaller package (TO-92 variant).	Preferred in low-voltage portable gear where space and gain uniformity matter more than HV tolerance.	Choose BC557B only in sub-50 V systems requiring tighter h_FE distribution and minimal board area.

Compared with MPSA92 and BC557B, the 2N5401RLRM uniquely balances 150 V capability, 300 MHz f_T, and TO-92 manufacturability-making it the preferred choice for cost-sensitive industrial controls needing both voltage headroom and signal fidelity.

Availability

2N5401RLRM is available at Aetrix Electronics and suitable for high-voltage switching, discrete audio preamplification, and linear voltage regulation requiring stable component supply across long-lifecycle industrial programs.

Supply support for 2N5401RLRM 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 specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The 2N5401RLRM belongs to onsemi's legacy discrete transistor portfolio, designed for reliability-critical through-hole analog signal conditioning and power control in industrial automation and power supply feedback loops.

FAQ

What is the maximum collector-emitter voltage rating for the 2N5401RLRM?

The 2N5401RLRM has a guaranteed minimum V_CEO rating of 150 Vdc under specified test conditions (I_C = 1.0 mA, I_B = 0). This rating is validated per onsemi's December 2005 datasheet revision and applies to continuous DC operation at T_A ≤ 25°C. Exceeding this voltage risks irreversible junction breakdown.

Does the 2N5401RLRM have Pb-free packaging options?

Yes, the 2N5401RLRM is offered in a Pb-free configuration as 2N5401RLRMG, also in TO-92 package with 2000-unit ammo box shipping. The "G" suffix denotes compliance with RoHS Directive 2011/65/EU, confirmed in onsemi's ordering information table and Pb-Free Packaging documentation.

What is the thermal resistance junction-to-ambient for the 2N5401RLRM?

The 2N5401RLRM has a maximum thermal resistance R_JA of 200 °C/W when mounted on a standard FR-4 PCB with no copper pour or heatsinking. This value assumes natural convection and is derived from onsemi's Thermal Characteristics table; actual performance improves with added copper area or airflow.

Can the 2N5401RLRM replace the 2N5400 in existing designs?

The 2N5401RLRM can replace the 2N5400 in most designs where higher voltage capability is beneficial, as it shares identical TO-92 package, pinout, and bias characteristics-but offers +30 V higher V_CEO (150 V vs. 120 V) and +10 V higher V_CBO. No layout changes are required, though system-level overvoltage margins should be re-evaluated.

What is the typical DC current gain (h_FE) of the 2N5401RLRM at 10 mA collector current?

At I_C = 10 mA and V_CE = 5.0 Vdc (T_A = 25°C), the 2N5401RLRM exhibits h_FE between 40 and 240 per onsemi's Electrical Characteristics table. The minimum guaranteed value is 40, while typical units measure ~100–180, supporting predictable bias point design in linear amplifier stages.

2N5401RLRM Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 600 mA

Voltage - Collector Emitter Breakdown (Max):: 150 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 5mA, 50mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 10mA, 5V

Power - Max:: 625 mW

Frequency - Transition:: 300MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

2N5401RLRM FAQ

1.How can I place an order for 2N5401RLRM through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N5401RLRM 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 2N5401RLRM reliable?

The price and inventory of 2N5401RLRM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N5401RLRM is usually 5 days.

3.What payment methods are accepted for 2N5401RLRM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N5401RLRM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N5401RLRM?

2N5401RLRM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N5401RLRM 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 2N5401RLRM?

For technical support, including 2N5401RLRM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N5401RLRM requirements.

6.How does Aetrix verify that 2N5401RLRM is sourced from the original manufacturer or authorized distributors?

All 2N5401RLRM 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 2N5401RLRM meets industry standards.

7.What is the process for return or replacement of 2N5401RLRM?

All 2N5401RLRM units undergo pre-shipment inspection (PSI). If there is an issue with 2N5401RLRM, 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 2N5401RLRM part is unused and in its original packaging.

Return procedure for 2N5401RLRM:

1.Submit a request within 90 days.

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

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