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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single, Pre-Biased Bipolar Transistors

Infineon Technologies BCR 139T E6327

Name: BCR 139T E6327
Brand: Infineon Technologies
SKU: BCR 139T E6327
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCR 139T E6327

Manufacturer:: Infineon Technologies

Category:: Single, Pre-Biased Bipolar Transistors

Package:: SC-75, SOT-416

Datasheet:: BCR 139T E6327.pdf

Description:: TRANS PREBIAS NPN 50V 0.1A SC75

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BCR 139T E6327 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistor (R1 = 22 kΩ), designed for low-power switching, interface, and driver circuits in space-constrained applications. It features V_CEO = 50 V, I_C = 100 mA, V_CE(sat) ≤ 0.3 V at I_C = 10 mA/I_B = 0.5 mA, h_FE = 120–630, and operates up to T_j = 150 °C.

For engineers reviewing the BCR 139T E6327 datasheet, BCR 139T E6327 pinout, BCR 139T E6327 application, or BCR 139T E6327 equivalent, key selection criteria include built-in R1 tolerance (15–29 kΩ), SC75 thermal resistance (R_thJS ≤ 165 K/W), f_T = 150 MHz, and reel packaging (E6327: 3,000 pcs/reel ø180 mm).

Technical Context

This digital transistor integrates a single 22 kΩ base bias resistor (R1) between base and input terminal, eliminating external bias components in simple on/off control paths. Its SC75 package enables high-density PCB layouts while maintaining thermal performance up to 109 °C case temperature.

The device operates in common-emitter configuration with guaranteed DC current gain (h_FE) across 5 mA–10 mA collector currents and supports fast switching via f_T = 150 MHz and low C_cb = 3 pF, making it suitable for logic-level interfacing and low-duty-cycle pulse drive.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum safe collector-emitter voltage before breakdown in switching-off state
I_C	100 mA - Continuous collector current rating defining load-driving capability
V_CE(sat)	≤ 0.3 V @ I_C=10 mA/I_B=0.5 mA - Low saturation voltage minimizes power loss in ON-state
h_FE	120–630 @ I_C=5 mA/V_CE=5 V - Wide DC gain range ensures reliable turn-on margin across production lots
f_T	150 MHz - Transition frequency enabling stable operation up to ~10–20 MHz square-wave switching
R1	15–29 kΩ (typ. 22 kΩ) - Integrated base resistor simplifies PCB layout and reduces component count
R_thJS	≤ 165 K/W - Junction-to-solder-point thermal resistance defines maximum power derating vs. board copper area

Pinout & Package

BCR 139T E6327 uses the SC75 (SOT-416) surface-mount package: 1.6 mm × 0.8 mm × 0.55 mm body, 3-terminal, gull-wing leads, tape-and-reel packing (E6327: 3,000 pcs/reel ø180 mm).

Pin/Terminal	Circuit Role	Design Meaning
1 (B)	Base	Input terminal connected internally to R1; accepts logic-level drive (Vi(on) = 0.5–1.1 V)
2 (E)	Emitter	Reference node for current return path; tied to ground or low-side switch reference
3 (C)	Collector	Output terminal driving load to V_CC; handles up to 100 mA continuous current

Key Features

Feature	Design Value
Integrated bias resistor	R1 = 22 kΩ ±27% (15–29 kΩ), eliminates need for external base resistor in standard logic-driven switches
Low V_CE(sat)	≤ 0.3 V ensures <10 mW conduction loss at 10 mA, critical for battery-powered interface stages
High-speed switching	f_T = 150 MHz supports clean edge integrity in 5–10 MHz clock buffering or PWM dimming drivers
Thermal robustness	Rated for T_j = 150 °C and T_S ≤ 109 °C, enabling use in thermally dense industrial control modules

Applications

LED Driver Circuit

Microcontroller GPIO Interface

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V MCU outputs in portable instrumentation.

IC Role / Device Role / Timing Role: Digital switch translating logic-high signal into LED current path.

Use Value: Built-in R1 ensures consistent turn-on with 3.3 V logic; V_CE(sat) ≤ 0.3 V preserves >3.0 V forward voltage margin for red/green LEDs.

Use Scenario: Level-shifting and current amplification between 1.8 V/3.3 V microcontrollers and 5 V peripheral enable lines.

IC Role / Device Role / Timing Role: Unidirectional level translator and buffer for reset, chip-select, or interrupt signals.

Use Value: Vi(on) ≤ 1.1 V guarantees reliable activation from 1.8 V logic; h_FE ≥ 120 provides noise immunity against GPIO leakage.

Relay Driver Stage

Small-Signal Inverter

Use Scenario: Controlling 5 V/10 mA coil relays in HVAC control panels with limited PCB area.

IC Role / Device Role / Timing Role: Low-side switch activating relay coil with flyback diode protection.

Use Value: I_C = 100 mA rating exceeds typical relay hold current; SC75 footprint saves >40% board space vs. SOT-23 alternatives.

Use Scenario: Signal inversion in low-power sensor signal conditioning chains (e.g., active-low interrupt generation).

IC Role / Device Role / Timing Role: Common-emitter inverter stage with fixed gain and predictable threshold.

Use Value: Vi(off) ≤ 0.8 V and Vi(on) ≥ 0.5 V provide clean logic transition; f_T = 150 MHz supports sub-100 ns propagation delay.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN digital transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCR139L3 E6327	Same die, TSLP-3-4 package (R_thJS ≤ 60 K/W), higher max case temp (135 °C)	Better thermal performance in high-density or elevated ambient environments	Select when board thermal relief is limited and junction temperature margin is critical
BCR139F E6327	Same die, TSFP-3 package (R_thJS ≤ 90 K/W), max case temp 128 °C	Intermediate thermal capability; compatible with standard SMT reflow profiles	Choose for cost-sensitive designs where SC75's smaller size isn't required

Compared with BCR139L3 and BCR139F, the BCR139T offers the smallest footprint (SC75) but highest thermal resistance-making it optimal for ultra-compact layouts where power dissipation stays below 100 mW and ambient temperature remains ≤ 60 °C.

Availability

BCR 139T E6327 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, relay driver stages, and small-signal inverters requiring stable component supply and consistent digital switching behavior.

Supply support for BCR 139T E6327 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and discrete devices, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The BCR139 series belongs to Infineon's digital transistor product line, engineered for simplified logic-level switching in consumer, industrial, and automotive subsystems where board space and BOM count reduction are primary design goals.

FAQ

What is the function of the built-in resistor R1 in BCR 139T E6327?

R1 is a 22 kΩ base bias resistor integrated between the base and input terminal. It enables direct connection to logic outputs without external components, setting the base current for guaranteed saturation at specified I_C. Its tolerance (15–29 kΩ) ensures robust turn-on across voltage and temperature variations.

Can BCR 139T E6327 replace a standard NPN transistor like BC847 in switching applications?

Yes-but only if the circuit relies on base-current drive and does not require adjustable bias. Unlike BC847, BCR139T has fixed R1, so it cannot be used in linear amplifier or variable-gain configurations. It is optimized for digital on/off operation, not analog amplification.

What is the maximum allowable continuous collector current at 85 °C ambient?

At T_A = 85 °C, derating applies per the P_tot vs. T_S curve for SC75: P_tot drops to ~150 mW at T_S ≈ 85 °C. With V_CE(sat) ≤ 0.3 V, max continuous I_C is ~500 mA in theory-but absolute I_C rating remains 100 mA per datasheet limits, regardless of temperature.

Is BCR 139T E6327 RoHS compliant and halogen-free?

Yes. Infineon confirms BCR139T E6327 meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The "E6327" packing code denotes lead-free, RoHS-compliant reel packaging with J-STD-020 moisture sensitivity level 1 (unlimited floor life at ≤ 30 °C/60% RH).

BCR 139T E6327 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: SC-75, SOT-416

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Transistor Type:: NPN - Pre-Biased

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

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

Resistor - Base (R1):: 22 kOhms

Resistor - Emitter Base (R2):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 120 @ 5mA, 5V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 500µA, 10mA

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

Frequency - Transition:: 150 MHz

Power - Max:: 250 mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SC75-3D

BCR 139T E6327 FAQ

1.How can I place an order for BCR 139T E6327 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCR 139T E6327 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 BCR 139T E6327 reliable?

The price and inventory of BCR 139T E6327 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR 139T E6327 is usually 5 days.

3.What payment methods are accepted for BCR 139T E6327?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR 139T E6327 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCR 139T E6327?

BCR 139T E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCR 139T E6327 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 BCR 139T E6327?

For technical support, including BCR 139T E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR 139T E6327 requirements.

6.How does Aetrix verify that BCR 139T E6327 is sourced from the original manufacturer or authorized distributors?

All BCR 139T E6327 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 BCR 139T E6327 meets industry standards.

7.What is the process for return or replacement of BCR 139T E6327?

All BCR 139T E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BCR 139T E6327, 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 BCR 139T E6327 part is unused and in its original packaging.

Return procedure for BCR 139T E6327:

1.Submit a request within 90 days.

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

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