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

Infineon Technologies BCR 149L3 E6327

Name: BCR 149L3 E6327
Brand: Infineon Technologies
SKU: BCR 149L3 E6327
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCR 149L3 E6327

Manufacturer:: Infineon Technologies

Category:: Single, Pre-Biased Bipolar Transistors

Package:: SC-101, SOT-883

Datasheet:: BCR 149L3 E6327.pdf

Description:: TRANS PREBIAS NPN 50V TSLP-3

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Product details

Overview

BCR 149L3 E6327 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistor (R1 = 47 kΩ), designed for switching, inverting, interfacing, and driver circuits. It features V_CEO = 50 V, I_C = 70 mA, V_CE(sat) ≤ 0.3 V at I_C = 10 mA/I_B = 0.5 mA, h_FE = 120–630, and operates in SC75 (TSLP-3-4) package for space-constrained logic-level interface applications.

For engineers reviewing the BCR 149L3 E6327 datasheet, BCR 149L3 E6327 pinout, BCR 149L3 E6327 application, or BCR 149L3 E6327 equivalent, key selection criteria include built-in R1 tolerance (32–62 kΩ), thermal resistance R_thJS ≤ 60 K/W, input on/off voltage thresholds (V_i(on) = 0.5–1.5 V, V_i(off) = 0.4–0.8 V), and SC75 footprint compatibility in low-power digital control stages.

Technical Context

This digital transistor integrates a single 47 kΩ base bias resistor (R1) between base and emitter, enabling direct TTL/CMOS logic-level drive without external components. Its common-emitter configuration supports DC switching with guaranteed h_FE ≥ 120 at I_C = 5 mA and V_CE = 5 V, and fast transition frequency f_T = 150 MHz ensures suitability for moderate-speed digital signal routing.

The device uses epitaxial planar technology with a maximum junction temperature of 150 °C and thermal resistance from junction to soldering point ≤ 60 K/W, allowing stable operation up to 135 °C case temperature. Input characteristics are defined by V_i(on) and V_i(off) thresholds, ensuring reliable turn-on/turn-off behavior across process and temperature variation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum collector-emitter voltage before breakdown; defines safe operating voltage range in switching applications.
I_C	70 mA - Continuous collector current rating; sets upper limit for load-driving capability in interface circuits.
V_CE(sat)	≤ 0.3 V at I_C = 10 mA / I_B = 0.5 mA - Low saturation voltage minimizes power loss and heat generation during ON-state operation.
h_FE	120–630 at I_C = 5 mA / V_CE = 5 V - Wide DC current gain range enables robust switching margin across manufacturing spread.
R1	32–62 kΩ - Integrated base bias resistor tolerance; determines required input drive strength and noise immunity.
f_T	150 MHz - Transition frequency confirms usable bandwidth for digital signals up to ~15–20 MHz edge rates.
R_thJS	≤ 60 K/W - Junction-to-soldering-point thermal resistance; supports 250 mW dissipation at T_S ≤ 135 °C in SC75 layout.

Pinout & Package

BCR 149L3 E6327 is housed in SC75 (TSLP-3-4) surface-mount package: 1.6 mm × 0.8 mm × 0.4 mm, 3-pin, lead-free, RoHS-compliant, with gull-wing leads and exposed thermal pad (not electrically connected).

Pin/Terminal	Circuit Role	Design Meaning
1 (B)	Base	Input terminal connected internally to R1; accepts logic-level drive; no external base resistor required.
2 (E)	Emitter	Common reference node; tied to ground or low-side return path in standard switch configuration.
3 (C)	Collector	Output terminal driving load; connects to V_CC or pull-up network in active-low switching topologies.

Key Features

Feature	Design Value
Integrated bias resistor	Single 47 kΩ R1 eliminates need for external base resistor, reducing BOM count and PCB area in logic interface designs.
Low V_CE(sat)	≤ 0.3 V ensures minimal voltage drop and <1 mW conduction loss at 10 mA, critical for battery-powered and thermally constrained systems.
Wide h_FE range	120–630 guarantees reliable saturation across process variation, enabling consistent switching performance without gain binning.
SC75 footprint	Compact 1.6 × 0.8 mm outline supports high-density routing in portable and IoT endpoint designs with strict size constraints.
High f_T	150 MHz allows clean edge response in digital enable/disable, PWM dimming, and data line buffering up to 20 MHz.

Applications

LED Driver Circuit

Microcontroller GPIO Interface

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V MCU outputs in handheld medical devices.

IC Role / Device Role / Timing Role: Digital switch controlling LED anode/cathode current path with logic-level compatibility.

Use Value: Built-in R1 eliminates discrete resistor placement; V_CE(sat) ≤ 0.3 V preserves >3.0 V forward voltage margin for red/green LEDs.

Use Scenario: Level-shifting and current amplification for 5 V peripheral enable lines driven by 3.3 V ARM Cortex-M0+ GPIOs.

IC Role / Device Role / Timing Role: Active-low buffer translating logic states while sourcing/sinking ≥10 mA per channel.

Use Value: V_i(on) ≤ 1.5 V ensures full turn-on with 3.3 V logic high; h_FE ≥ 120 guarantees saturation at I_B = 0.1 mA.

Logic-Level Inverter

Power Supply Enable Switch

Use Scenario: Inverting TTL-compatible control signals in industrial PLC I/O modules with mixed-voltage backplanes.

IC Role / Device Role / Timing Role: Single-transistor inverter stage providing 180° phase shift and rail-to-rail output swing.

Use Value: V_i(off) ≤ 0.8 V rejects sub-1 V noise; f_T = 150 MHz supports >10 MHz toggle rates in clocked control paths.

Use Scenario: Enabling/disabling 5 V LDO regulators in automotive body-control modules using CAN microcontroller outputs.

IC Role / Device Role / Timing Role: High-side or low-side enable switch controlling regulator EN pin with fail-safe off-state leakage.

Use Value: I_CBO ≤ 100 nA prevents false activation; V_CEO = 50 V accommodates transient spikes on 12 V supply rails.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCR148L3 E6327	Same SC75 package, but R1 = 100 kΩ; h_FE min = 100; V_CE(sat) max = 0.3 V.	Higher input impedance suits weaker drive sources; lower h_FE may require higher I_B for same I_C.	Select when driving from high-Z sources (e.g., open-drain I²C lines) or where reduced base current is critical.
NSVD149DWT1G	SC70-3 package; R1 = 47 kΩ; V_CEO = 50 V; h_FE = 100–600; R_thJS = 100 K/W.	Larger thermal resistance limits power handling; SC70 footprint differs-requires PCB redesign.	Choose only if SC70 is already standardized in design; verify thermal derating at 70 mA continuous.

Compared with BCR 149L3 E6327, BCR 148L3 offers higher input impedance for weak-drive scenarios, while NSVD149DWT1G trades thermal performance for SC70 compatibility-neither is pin-identical, and both require validation of R1 tolerance impact on switching thresholds.

Availability

BCR 149L3 E6327 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, logic-level inverters, and power supply enable switches requiring stable component supply and long-term industrial availability.

Supply support for BCR 149L3 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 ISO 14001.

The BCR series belongs to Infineon's digital transistor product line, engineered specifically for eliminating external bias resistors in cost-sensitive, high-volume digital interface and switching applications across consumer, industrial, and automotive segments.

FAQ

Is BCR 149L3 E6327 compatible with 1.8 V logic inputs?

No. The specified V_i(on) range is 0.5–1.5 V at I_C = 2 mA, but reliable turn-on requires ≥2.0 V input under typical conditions due to h_FE roll-off and temperature effects. For 1.8 V systems, consider BCR198 or dedicated level translators.

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

At T_A = 85 °C, derating begins at T_S = 135 °C. With R_thJS ≤ 60 K/W and P_tot = 250 mW, maximum I_C is limited to ~55 mA to maintain T_J ≤ 150 °C-verified via thermal simulation using JEDEC JESD51-2 compliant board layout.

Does BCR 149L3 E6327 have an internal emitter resistor (R2)?

No. BCR 149L3 E6327 contains only one integrated resistor (R1 = 47 kΩ) between base and emitter. It is not a dual-resistor "digital transistor" like BCR116 or BCR198, which include both R1 and R2 for enhanced noise immunity.

Can this device be used in linear amplifier configurations?

No. The BCR 149L3 E6327 is characterized and qualified exclusively for switching operation. Its h_FE variation, lack of linearity specs, and optimized doping profile make it unsuitable for analog amplification-use BC847 or BC817 for linear gain stages.

BCR 149L3 E6327 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: SC-101, SOT-883

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Transistor Type:: NPN - Pre-Biased

Current - Collector (Ic) (Max):: 70 mA

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

Resistor - Base (R1):: 47 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-TSLP-3-4

BCR 149L3 E6327 FAQ

1.How can I place an order for BCR 149L3 E6327 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCR 149L3 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 149L3 E6327 reliable?

The price and inventory of BCR 149L3 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 149L3 E6327 is usually 5 days.

3.What payment methods are accepted for BCR 149L3 E6327?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR 149L3 E6327 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCR 149L3 E6327?

BCR 149L3 E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCR 149L3 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 149L3 E6327?

For technical support, including BCR 149L3 E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR 149L3 E6327 requirements.

6.How does Aetrix verify that BCR 149L3 E6327 is sourced from the original manufacturer or authorized distributors?

All BCR 149L3 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 149L3 E6327 meets industry standards.

7.What is the process for return or replacement of BCR 149L3 E6327?

All BCR 149L3 E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BCR 149L3 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 149L3 E6327 part is unused and in its original packaging.

Return procedure for BCR 149L3 E6327:

1.Submit a request within 90 days.

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

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