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

NXP Semiconductors BC327-40,112

Name: BC327-40,112
Brand: NXP Semiconductors
SKU: BC327-40,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC327-40,112

Manufacturer:: NXP Semiconductors

Category:: Single Bipolar Transistors

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

Datasheet:: BC327-40,112.pdf

Description:: TRANS PNP 45V 0.5A TO-92-3

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Product details

Overview

BC327-40,112 from Nexperia is a PNP bipolar junction transistor (BJT) designed for general-purpose switching and linear amplification in through-hole PCB designs. It delivers −45 V V_CEO, −500 mA continuous collector current, 250–600 DC current gain (h_FE) at −100 mA/−1 V, −700 mV V_CE(sat) at −500 mA/−50 mA drive, and operates across −65 °C to +150 °C ambient temperature - enabling robust use in industrial power control and automotive body electronics.

For engineers reviewing the BC327-40,112 datasheet, BC327-40,112 pinout, BC327-40,112 application, or BC327-40,112 equivalent, this page provides verified package mapping (SOT54/TO-92), validated thermal resistance (R_th(j-a) = 200 K/W), confirmed h_FE binning (250–600), exact pin assignment (Emitter-Base-Collector), and real-world substitution guidance for legacy NXP/Nexperia BJT design continuity.

Technical Context

This device implements a silicon planar epitaxial PNP structure optimized for stable DC gain and low saturation voltage under moderate load conditions. Its h_FE range of 250–600 at IC = −100 mA/V_CE = −1 V ensures predictable current amplification in base-driven switch configurations, while its −700 mV V_CE(sat) at −500 mA/−50 mA supports efficient operation in 5 V and 12 V logic-level interfaced loads.

The BC327-40,112 uses a plastic single-ended leaded (through-hole) SOT54 (TO-92) package with 2.54 mm lead pitch, rated for 625 mW total power dissipation at T_amb ≤ 25 °C and thermal resistance of 200 K/W - making it suitable for non-forced-air applications where board-level heat spreading is available.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−45 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in high-side switch or amplifier stages.
I_C (DC)	−500 mA - Continuous collector current rating; sets maximum steady-state load capability without derating.
h_FE	250–600 at I_C = −100 mA, V_CE = −1 V - Confirmed DC current gain bin for BC327-40 variant; enables precise base resistor calculation for saturated switching.
V_CE(sat)	−700 mV at I_C = −500 mA, I_B = −50 mA - Verified saturation voltage; determines power loss and heating in on-state switching applications.
P_tot	625 mW at T_amb ≤ 25 °C - Total power dissipation limit; defines thermal headroom before junction temperature exceeds 150 °C.
R_th(j-a)	200 K/W - Junction-to-ambient thermal resistance on FR4 PCB; used to calculate actual T_j rise under real operating conditions.
T_j max	+150 °C - Absolute maximum junction temperature; constrains ambient and power envelope in sealed enclosures.

Pinout & Package

SOT54 (TO-92) is a plastic single-ended leaded through-hole package with 2.54 mm lead pitch, 14.5 mm body length, and standard JEDEC SC-43A outline. It provides mechanical stability and solderability for manual assembly and wave-solder processes.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit terminal for PNP operation; connects to higher-potential rail in high-side switch configurations.
2	Base	Control input; requires current-limited drive (e.g., via series resistor) to achieve target I_C and saturation.
3	Collector	Current entry terminal; typically tied to load and ground return path in common-emitter switch topologies.

Key Features

Feature	Design Value
High DC current gain bin	h_FE = 250–600 ensures reliable turn-on with modest base drive in microcontroller GPIO interfacing.
Low saturation voltage	V_CE(sat) ≤ −700 mV at full 500 mA load minimizes conduction loss and self-heating in power switching.
Through-hole reliability	SOT54 (TO-92) package offers proven mechanical retention and thermal coupling to copper pour on industrial PCBs.
Wide temperature operation	−65 °C to +150 °C ambient range supports deployment in automotive engine bays and industrial motor controls.

Applications

Industrial Motor Control	Automotive Body Electronics
Use Scenario: Driving 12 V DC cooling fans or solenoid valves in PLC I/O modules. IC Role / Device Role / Timing Role: PNP BJT configured as high-side switch, controlled by optocoupled or isolated logic signals. Use Value: −45 V V_CEO and −500 mA I_C safely handle inductive kickback and peak startup currents without snubbing.	Use Scenario: Controlling door lock actuators and interior lighting relays in vehicle body control units. IC Role / Device Role / Timing Role: General-purpose PNP switch interfacing with 5 V microcontroller outputs via base resistor network. Use Value: 250–600 h_FE bin allows consistent saturation across production lots despite supply voltage variation.
Consumer Appliance Power Stages	Legacy Equipment Repair
Use Scenario: Replacing obsolete transistors in AC/DC power supply bias circuits and relay drivers. IC Role / Device Role / Timing Role: Linear amplifier or switch in feedback paths and auxiliary power rails. Use Value: −700 mV V_CE(sat) reduces heat generation in compact, unventilated enclosures typical of white goods.	Use Scenario: Drop-in replacement for BC327-40 variants in vintage test equipment and industrial controllers. IC Role / Device Role / Timing Role: Direct-fit through-hole transistor maintaining original footprint, pinout, and electrical behavior. Use Value: Identical SOT54 mechanical form factor and JEDEC SC-43A marking (C32740) ensure zero PCB rework.

Industrial Motor Control

Automotive Body Electronics

Use Scenario: Driving 12 V DC cooling fans or solenoid valves in PLC I/O modules.

IC Role / Device Role / Timing Role: PNP BJT configured as high-side switch, controlled by optocoupled or isolated logic signals.

Use Value: −45 V V_CEO and −500 mA I_C safely handle inductive kickback and peak startup currents without snubbing.

Use Scenario: Controlling door lock actuators and interior lighting relays in vehicle body control units.

IC Role / Device Role / Timing Role: General-purpose PNP switch interfacing with 5 V microcontroller outputs via base resistor network.

Use Value: 250–600 h_FE bin allows consistent saturation across production lots despite supply voltage variation.

Consumer Appliance Power Stages

Legacy Equipment Repair

Use Scenario: Replacing obsolete transistors in AC/DC power supply bias circuits and relay drivers.

IC Role / Device Role / Timing Role: Linear amplifier or switch in feedback paths and auxiliary power rails.

Use Value: −700 mV V_CE(sat) reduces heat generation in compact, unventilated enclosures typical of white goods.

Use Scenario: Drop-in replacement for BC327-40 variants in vintage test equipment and industrial controllers.

IC Role / Device Role / Timing Role: Direct-fit through-hole transistor maintaining original footprint, pinout, and electrical behavior.

Use Value: Identical SOT54 mechanical form factor and JEDEC SC-43A marking (C32740) ensure zero PCB rework.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC327-40,135	Same electrical specs and SOT54 package; differs only in tape-and-reel packing (10,000 pcs/reel vs. bulk 112).	No functional difference; selected when automated pick-and-place integration is required.	Choose BC327-40,135 for SMT-compatible reel-fed assembly; BC327-40,112 remains optimal for manual prototyping and repair.
BC327-40TA	Identical h_FE, V_CEO, and I_C; uses SOT54A (wide-pitch) variant with 5.08 mm lead spacing instead of 2.54 mm.	Requires PCB footprint modification; suited for high-vibration environments where wider creepage improves reliability.	Select BC327-40TA only if board layout accommodates 5.08 mm pitch; otherwise BC327-40,112 maintains direct compatibility.

Compared with BC327-40,135 and BC327-40TA, the BC327-40,112 offers standardized SOT54 (2.54 mm pitch) in bulk packaging - delivering lowest cost per unit and fastest availability for hand-soldered builds, field repairs, and low-volume industrial manufacturing where tape-and-reel or wide-pitch variants introduce unnecessary layout or procurement overhead.

Availability

BC327-40,112 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and consumer appliance power stages requiring stable component supply and long-term obsolescence management.

Supply support for BC327-40,112 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

Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products business. It focuses on automotive, industrial, computing, and consumer markets.

The BC327-40,112 belongs to Nexperia's legacy general-purpose BJT portfolio, engineered for reliability and consistency in through-hole switching and amplification applications across harsh environments.

FAQ

What is the package type and pin configuration of BC327-40,112?

The BC327-40,112 uses the SOT54 (TO-92) through-hole package with standardized JEDEC SC-43A outline. Pin 1 is Emitter, Pin 2 is Base, and Pin 3 is Collector - matching industry-standard BC327 family pinout and enabling direct replacement in legacy designs without PCB modification.

What is the DC current gain (h_FE) range for BC327-40,112?

The BC327-40,112 is binned to h_FE = 250–600 at I_C = −100 mA and V_CE = −1 V, as confirmed in Table 8 of the official Nexperia datasheet. This gain range is specific to the "-40" suffix and distinguishes it from BC327-16 (100–250) and BC327-25 (160–400) variants.

Can BC327-40,112 replace BC327-40 in existing designs?

Yes - BC327-40,112 is a direct form-fit-function replacement for BC327-40. The ",112" suffix denotes bulk packaging with straight leads per Table 9, while all electrical, thermal, and mechanical specifications including SOT54 footprint, pinout, and h_FE bin remain identical to the base BC327-40 designation.

What is the maximum power dissipation and thermal resistance of BC327-40,112?

The BC327-40,112 has a total power dissipation (P_tot) of 625 mW at T_amb ≤ 25 °C and a junction-to-ambient thermal resistance (R_th(j-a)) of 200 K/W when mounted on an FR4 PCB with single-sided copper, as specified in Tables 6 and 7 of the Nexperia datasheet.

Is BC327-40,112 suitable for automotive applications?

Yes - the BC327-40,112 operates across −65 °C to +150 °C ambient temperature and meets AEC-Q101 stress test requirements for discrete transistors. Its −45 V V_CEO, −500 mA I_C, and robust h_FE stability make it appropriate for non-safety-critical automotive body electronics such as lamp drivers and window lift controls.

BC327-40,112 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 700mV @ 50mA, 500mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 250 @ 100mA, 1V

Power - Max:: 625 mW

Frequency - Transition:: 80MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

BC327-40,112 FAQ

1.How can I place an order for BC327-40,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC327-40,112 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 BC327-40,112 reliable?

The price and inventory of BC327-40,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC327-40,112 is usually 5 days.

3.What payment methods are accepted for BC327-40,112?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC327-40,112 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC327-40,112?

BC327-40,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC327-40,112 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 BC327-40,112?

For technical support, including BC327-40,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC327-40,112 requirements.

6.How does Aetrix verify that BC327-40,112 is sourced from the original manufacturer or authorized distributors?

All BC327-40,112 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 BC327-40,112 meets industry standards.

7.What is the process for return or replacement of BC327-40,112?

All BC327-40,112 units undergo pre-shipment inspection (PSI). If there is an issue with BC327-40,112, 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 BC327-40,112 part is unused and in its original packaging.

Return procedure for BC327-40,112:

1.Submit a request within 90 days.

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

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