Infineon Technologies BCR505E6327HTSA1

Overview

BCR505E6327HTSA1 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistors (R1 = 2.2 kΩ, R2 = 10 kΩ), rated for 50 V V_CEO, 500 mA I_C, and 330 mW P_tot at T_S ≤ 79 °C, commonly used in automotive LED driver and logic-level interface circuits.

For engineers reviewing the BCR505E6327HTSA1 datasheet, BCR505E6327HTSA1 pinout, BCR505E6327HTSA1 application, or BCR505E6327HTSA1 equivalent, key selection criteria include input threshold voltages (V_i(off) ≤ 1 V, V_i(on) ≤ 1.4 V), guaranteed h_FE ≥ 70 at 50 mA, V_CE(sat) ≤ 0.3 V, AEC-Q101 qualification, and SOT23 package thermal resistance (R_thJS ≤ 215 K/W).

Technical Context

This digital transistor integrates two precision on-chip resistors to enable direct TTL/CMOS logic-level drive without external base biasing. Its internal R1–R2 network sets a fixed current gain ratio (R1/R2 = 0.22 typ.), simplifying switching control in low-side load configurations.

The device operates across –65 °C to 150 °C storage and junction temperature ranges, supports pulse operation up to 100 MHz f_T, and maintains stable V_CE(sat) ≤ 0.3 V under I_C/I_B = 20 conditions - critical for minimizing conduction loss in automotive body electronics.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package with gull-wing leads, 1.3 mm pitch, 2.9 mm × 1.3 mm footprint, and 1.15 mm height; optimized for automated placement and reflow soldering in space-constrained automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCR505E6327HTSA1, the HTMA1 variant offers identical performance in smaller reels for flexibility, while the BCR505W provides footprint reduction at the cost of thermal derating - both require validation of layout-specific R_thJA before substitution.

Availability

BCR505E6327HTSA1 is available at Aetrix Electronics and suitable for automotive lighting control, industrial I/O modules, and consumer appliance motor interfaces requiring stable component supply and AEC-Q101-compliant sourcing.

Supply support for BCR505E6327HTSA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global manufacturing and quality certification infrastructure.

The BCR505 belongs to Infineon's automotive-qualified digital transistor family, designed specifically for replacing discrete BJT + resistor combinations in logic-driven switching applications across vehicle body electronics and powertrain subsystems.

FAQ

What is the maximum safe operating voltage for BCR505E6327HTSA1?

The absolute maximum collector-emitter voltage (V_CEO) is 50 V, and collector-base voltage (V_CBO) is also rated at 50 V. Operation above these values risks avalanche breakdown. For reliable long-term use in automotive 12 V systems, design margins should keep V_CE ≤ 36 V under transient conditions per ISO 7637-2 pulse 5a.

Can BCR505E6327HTSA1 replace a standard NPN transistor like BC847 in existing designs?

No - BCR505E6327HTSA1 has internal bias resistors and is not pin-compatible with BC847. Its base terminal connects to an R1–R2 divider, so direct substitution would cause incorrect biasing. Redesign is required to remove external base resistors and verify logic-level compatibility with V_i(on)/V_i(off) thresholds.

Does BCR505E6327HTSA1 support PWM switching at frequencies above 20 kHz?

Yes - with f_T = 100 MHz and V_CE(sat) stable up to 125 °C, it supports clean switching at 20–50 kHz for LED dimming. However, layout parasitics and load inductance dominate rise/fall times; measured t_r/t_f is typically 25 ns at I_C = 50 mA with proper gate drive impedance matching.

Is thermal derating required when ambient temperature exceeds 79 °C?

Yes - P_tot must be linearly derated above T_S = 79 °C at 3.3 mW/°C, per the P_tot vs. T_S curve. At 105 °C case temperature, maximum allowed power drops to ~240 mW. Thermal design must ensure solder-point temperature stays within limits using PCB copper area or localized airflow.