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

NXP Semiconductors BC327-25,112

Name: BC327-25,112
Brand: NXP Semiconductors
SKU: BC327-25,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC327-25,112

Manufacturer:: NXP Semiconductors

Category:: Single Bipolar Transistors

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

Datasheet:: BC327-25,112.pdf

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

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Product details

Overview

BC327-25,112 from Nexperia is a PNP general-purpose bipolar junction transistor (BJT) in TO-92 (SOT54) through-hole package, rated for −45 V V_CEO, −500 mA I_C, and DC current gain (h_FE) of 160–400 at I_C = −100 mA and V_CE = −1 V. It delivers −700 mV V_CE(sat) at I_C = −500 mA / I_B = −50 mA and supports general-purpose switching in industrial control logic and low-voltage power stage interfaces.

For engineers reviewing the BC327-25,112 datasheet, BC327-25,112 pinout, BC327-25,112 application, or BC327-25,112 equivalent, this page provides verified electrical parameters, thermal resistance (R_th(j-a) = 200 K/W), package dimensions, pin mapping, and validated alternative parts - all specific to the BC327-25 variant in SOT54 packaging with marking code C32725.

Technical Context

This PNP BJT operates in active, saturation, and cutoff regions with defined absolute maximum ratings: −50 V V_CBO, −5 V V_EBO, −1 A I_CM, and 625 mW P_tot at T_amb ≤ 25 °C. Its junction temperature limit is 150 °C, and storage temperature range spans −65 °C to +150 °C.

Electrical behavior is characterized under pulse test conditions (t_p ≤ 300 μs, duty cycle δ ≤ 0.02). Key dynamic specs include 80 MHz f_T at I_C = −10 mA, V_CE = −5 V, and 5 pF C_c at V_CB = −10 V, f = 1 MHz - confirming suitability for low-frequency switching and linear amplification up to several megahertz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−45 V - Maximum collector-emitter voltage before breakdown with base open; defines safe operating voltage in switching applications.
I_C (DC)	−500 mA - Continuous collector current rating; sets upper bound for steady-state load drive capability.
h_FE	160–400 - DC current gain range at I_C = −100 mA, V_CE = −1 V; determines required base drive for reliable saturation.
V_CE(sat)	−700 mV - Collector-emitter saturation voltage at I_C = −500 mA, I_B = −50 mA; directly impacts conduction loss and heat generation.
P_tot	625 mW - Total power dissipation at T_amb ≤ 25 °C; defines thermal derating envelope on standard FR4 PCB.
R_th(j-a)	200 K/W - Junction-to-ambient thermal resistance; enables estimation of junction temperature rise under real-world board conditions.
f_T	80 MHz - Transition frequency at I_C = −10 mA, V_CE = −5 V; indicates usable bandwidth for small-signal amplification.

Pinout & Package

BC327-25,112 uses the SOT54 (TO-92) plastic single-ended leaded through-hole package per JEITA SC-43A, with 2.54 mm lead pitch, 5.2 mm body length, and 4.8 mm body width. Pin 1 is emitter, Pin 2 is base, Pin 3 is collector - confirmed per Table 3 and Figure 15 of the official datasheet.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit terminal for PNP operation; connects to ground or lower-potential rail in common-emitter configurations.
2	Base	Control input node; requires negative bias relative to emitter to turn on; drives switching speed and gain stability.
3	Collector	Current entry terminal; connects to load and supply rail; handles full switched current and associated power dissipation.

Key Features

Feature	Design Value
High DC current gain	h_FE = 160–400 ensures low base drive current requirement for robust saturation in switching circuits.
Low saturation voltage	V_CE(sat) = −700 mV minimizes conduction losses and self-heating during high-current operation.
Through-hole reliability	SOT54 (TO-92) package provides mechanical stability and solder-joint integrity for industrial environments.
Thermal performance	R_th(j-a) = 200 K/W enables higher continuous current capability than comparable SOT23/SOT323 surface-mount variants.

Applications

Industrial Relay Drivers	Linear Voltage Regulator Pass Transistors
Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules and motor control panels. IC Role / Device Role / Timing Role: PNP switch controlling relay coil current path between supply rail and ground-return path. Use Value: −500 mA I_C rating and −700 mV V_CE(sat) ensure full coil energization with minimal voltage drop and heat buildup.	Use Scenario: Acting as series pass element in adjustable 3-terminal linear regulators for sensor signal conditioning. IC Role / Device Role / Timing Role: Current-amplifying pass transistor regulating output voltage via feedback-controlled base bias. Use Value: 160–400 h_FE enables precise current mirroring and stable loop gain across temperature and load variations.
LED Matrix Row Drivers	Audio Preamp Stages
Use Scenario: Sourcing current to rows of multiplexed LED displays in industrial HMIs and instrumentation panels. IC Role / Device Role / Timing Role: High-side PNP switch enabling row-by-row scanning with common-cathode LED arrays. Use Value: −45 V V_CEO headroom accommodates transient spikes in 24 V systems while maintaining safe margin.	Use Scenario: Low-noise amplification of microphone or piezoelectric sensor signals in portable test equipment. IC Role / Device Role / Timing Role: Common-emitter amplifier stage providing voltage gain and impedance matching. Use Value: 80 MHz f_T and low C_c (5 pF) support clean audio-band response without high-frequency roll-off or instability.

Industrial Relay Drivers

Linear Voltage Regulator Pass Transistors

Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules and motor control panels.

IC Role / Device Role / Timing Role: PNP switch controlling relay coil current path between supply rail and ground-return path.

Use Value: −500 mA I_C rating and −700 mV V_CE(sat) ensure full coil energization with minimal voltage drop and heat buildup.

Use Scenario: Acting as series pass element in adjustable 3-terminal linear regulators for sensor signal conditioning.

IC Role / Device Role / Timing Role: Current-amplifying pass transistor regulating output voltage via feedback-controlled base bias.

Use Value: 160–400 h_FE enables precise current mirroring and stable loop gain across temperature and load variations.

LED Matrix Row Drivers

Audio Preamp Stages

Use Scenario: Sourcing current to rows of multiplexed LED displays in industrial HMIs and instrumentation panels.

IC Role / Device Role / Timing Role: High-side PNP switch enabling row-by-row scanning with common-cathode LED arrays.

Use Value: −45 V V_CEO headroom accommodates transient spikes in 24 V systems while maintaining safe margin.

Use Scenario: Low-noise amplification of microphone or piezoelectric sensor signals in portable test equipment.

IC Role / Device Role / Timing Role: Common-emitter amplifier stage providing voltage gain and impedance matching.

Use Value: 80 MHz f_T and low C_c (5 pF) support clean audio-band response without high-frequency roll-off or instability.

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
BC327-40,112	Higher h_FE (250–600) but identical V_CEO, I_C, and package; slightly higher V_CE(sat) at same I_C/I_B.	Better suited for low-base-drive designs where gain consistency is critical; less optimal for high-speed switching due to longer storage time.	Select BC327-40,112 when minimizing base current is essential and switching speed is secondary.
BC327-16,112	Lower h_FE (100–250); otherwise identical voltage, current, and thermal specs; tighter gain binning.	Preferred in cost-sensitive volume production where predictable, bounded gain simplifies bias network design.	Choose BC327-16,112 for deterministic biasing in fixed-gain amplifier stages or legacy designs requiring known h_FE limits.

Compared with BC327-40,112 and BC327-16,112, the BC327-25,112 offers balanced gain (160–400), low saturation voltage, and proven thermal performance in TO-92 - making it the optimal choice for general-purpose switching where moderate gain and low conduction loss are both required.

Availability

BC327-25,112 is available at Aetrix Electronics and suitable for industrial relay drivers, linear regulator pass elements, LED matrix row drivers, and audio preamp stages requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for BC327-25,112 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, with focus on automotive, industrial, computing, consumer, and wearable markets.

The BC327-25,112 belongs to Nexperia's general-purpose bipolar transistor product line, designed specifically for cost-effective, reliable switching and amplification in industrial control, power management, and signal conditioning applications.

FAQ

What is the maximum collector-emitter voltage rating for BC327-25,112?

The BC327-25,112 has a maximum collector-emitter voltage (V_CEO) rating of −45 V with the base open and I_C = 10 mA. This rating is confirmed in Table 2 (Quick reference data) and Table 6 (Limiting values) of the official Nexperia datasheet. Exceeding this voltage risks avalanche breakdown and permanent device failure.

Does BC327-25,112 have the same pinout as BC337?

No - BC327-25,112 (PNP) and BC337 (NPN) share identical SOT54 physical packaging and pin numbering (emitter-base-collector = pins 1-2-3), but their polarity and biasing requirements are opposite. The BC327-25,112 pinout is emitter (1), base (2), collector (3), as specified in Table 3 and Figure 15 of the datasheet.

What is the thermal resistance from junction to ambient for BC327-25,112?

The thermal resistance from junction to ambient (R_th(j-a)) for BC327-25,112 is 200 K/W when mounted on an FR4 PCB with single-sided copper, tin-plated, and standard footprint - per Table 7 of the Nexperia datasheet. This value enables accurate junction temperature calculation under real operating conditions.

What does the marking code 'C32725' indicate on BC327-25,112?

The marking code 'C32725' laser-etched on the BC327-25,112 case identifies it specifically as the BC327-25 variant in SOT54 packaging, per Table 5 (Marking codes) of the datasheet. This distinguishes it from BC327-16 (C32716) and BC327-40 (C32740), ensuring correct gain-bin identification during visual inspection and automated assembly.

Can BC327-25,112 replace BC807-25 in a circuit?

BC327-25,112 and BC807-25 are functionally identical PNP transistors with matching V_CEO, I_C, h_FE, and V_CE(sat) specs, but differ in package: BC327-25,112 uses through-hole SOT54, while BC807-25 uses surface-mount SOT23. Direct replacement requires PCB layout change; electrical behavior remains consistent if mechanical fit is addressed.

BC327-25,112 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:: 160 @ 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

BC327-25,112 FAQ

1.How can I place an order for BC327-25,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC327-25,112 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 BC327-25,112 reliable?

The price and inventory of BC327-25,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC327-25,112 is usually 5 days.

3.What payment methods are accepted for BC327-25,112?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC327-25,112 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC327-25,112?

BC327-25,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC327-25,112 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 BC327-25,112?

For technical support, including BC327-25,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC327-25,112 requirements.

6.How does Aetrix verify that BC327-25,112 is sourced from the original manufacturer or authorized distributors?

All BC327-25,112 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 BC327-25,112 meets industry standards.

7.What is the process for return or replacement of BC327-25,112?

All BC327-25,112 units undergo pre-shipment inspection (PSI). If there is an issue with BC327-25,112, 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 BC327-25,112 part is unused and in its original packaging.

Return procedure for BC327-25,112:

1.Submit a request within 90 days.

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

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