Infineon Technologies BCR 179T E6327

Overview

BCR 179T E6327 from Infineon Technologies is a PNP silicon digital transistor with integrated bias resistor (R1 = 10 kΩ), designed for low-power switching, interface, and driver circuits. It features V_CEO = 50 V, I_C = 100 mA, h_FE = 120–630, V_CE(sat) ≤ 0.3 V at I_C = 10 mA/I_B = 0.5 mA, and operates in SC75 package with T_j = 150 °C max.

For engineers reviewing the BCR 179T E6327 datasheet, BCR 179T E6327 pinout, BCR 179T E6327 application, or BCR 179T E6327 equivalent, key selection criteria include built-in R1 tolerance (7–13 kΩ), thermal resistance R_thJS = 165 K/W, input on/off voltage behavior across temperature, and SC75 footprint compatibility for space-constrained PCB layouts.

Technical Context

This device integrates a PNP bipolar junction transistor with a monolithic 10 kΩ base-emitter pull-up resistor (R1), enabling single-resistor logic-level interfacing without external bias components. Its common-emitter configuration supports DC switching and small-signal amplification with guaranteed h_FE ≥ 120 at I_C = 5 mA.

The SC75 package delivers compact mounting (1.6 × 0.8 mm) and defined thermal path to soldering point (R_thJS ≤ 165 K/W), making it suitable for thermally sensitive applications where ambient derating must be calculated from T_S ≤ 109 °C at full P_tot = 250 mW.

Key Specifications

Pinout & Package

BCR 179T E6327 is housed in SC75 (SOT-416) surface-mount package: 1.6 mm × 0.8 mm body, 0.45 mm nominal height, 0.65 mm lead pitch, and gull-wing terminations. Pin 1 = Base (B), Pin 2 = Emitter (E), Pin 3 = Collector (C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCR179T E6327, BCR190T offers higher gain for marginal drive conditions, while NSV179T1T1G trades bandwidth for tighter R1 tolerance-both retain SC75 compatibility but differ in gain-bandwidth-resistor trade-offs critical for interface stability.

Availability

BCR 179T E6327 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface stages, relay driver modules, and power supply enable control requiring stable component supply and consistent digital switching performance.

Supply support for BCR 179T 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, industrial, and digital logic solutions, 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 for simplified logic interfacing and low-power switching in space-constrained consumer, industrial, and automotive subsystems.

FAQ

What is the function of the built-in resistor R1 in BCR 179T E6327?

R1 is a monolithically integrated 10 kΩ base-to-emitter resistor that provides automatic biasing for reliable transistor turn-off when the base input is left floating or driven low. It eliminates the need for an external pull-down resistor in inverter and switch applications, reducing bill-of-materials count and PCB area while ensuring consistent cutoff behavior across temperature and process variation.

Can BCR 179T E6327 replace a standard PNP BJT like BC807 in existing designs?

Yes, but only if the circuit relies on active-low switching with logic-level base drive and does not require adjustable bias. Unlike BC807, BCR179T has fixed R1 and cannot operate in linear amplifier mode. Its guaranteed V_CE(sat) ≤ 0.3 V and h_FE ≥ 120 simplify drive design but limit flexibility in analog applications or variable-gain configurations.

What is the maximum allowable ambient temperature for continuous operation at full rated current?

At I_C = 100 mA and P_tot = 250 mW, the maximum case temperature (T_S) must not exceed 109 °C. Using R_thJS = 165 K/W and T_j = 150 °C, the maximum ambient temperature depends on board thermal design. With typical R_thSA ≈ 200 K/W, ambient must stay below ~55 °C for continuous full-load operation without forced cooling.

Is BCR 179T E6327 RoHS compliant and halogen-free?

Yes. BCR 179T E6327 complies with EU RoHS Directive 2011/65/EU and is manufactured as a halogen-free device per IEC 61249-2-21. The SC75 package uses lead-free matte tin terminal finish, and material declarations confirm absence of brominated flame retardants, chlorine, and fluorine above threshold limits.