Infineon Technologies BCR 148W H6433

Overview

BCR 148W H6433 from Nexperia is an NPN silicon digital transistor with integrated bias resistors (R1 = R2 = 47 kΩ), designed for switching, inverter, and interface driver applications in automotive and industrial control circuits. It features V_CEO = 50 V, I_C = 100 mA, V_CE(sat) ≤ 0.3 V at I_C/I_B = 20, h_FE ≥ 70, and operates up to T_j = 150 °C in SOT323 package.

For engineers reviewing the BCR 148W H6433 datasheet, BCR 148W H6433 pinout, BCR 148W H6433 application, or BCR 148W H6433 equivalent, key selection criteria include built-in resistor matching, AEC-Q101 qualification, thermal resistance R_thJS ≤ 105 K/W, input voltage thresholds (V_i(on) = 1–3 V, V_i(off) = 0.8–1.5 V), and SOT323 footprint compatibility with space-constrained PCB layouts.

Technical Context

This device integrates two matched resistors (R1/R2 = 0.9–1.1) directly into an NPN transistor die, eliminating external bias components in low-power switching nodes. Its monolithic construction ensures stable current gain (h_FE ≥ 70 at I_C = 5 mA) and tight V_CE(sat) performance (≤ 0.3 V) across temperature.

The SOT323 package enables high thermal efficiency (R_thJS ≤ 105 K/W) and supports pulsed operation up to P_tot(max)/P_tot(DC) = 0.5 at t_p = 10 ms (D = 0), making it suitable for intermittent load control in automotive body electronics and sensor interface stages.

Key Specifications

Pinout & Package

SOT323 (SC-70) surface-mount package with 3-pin configuration: compact 2.1 × 1.25 × 0.95 mm footprint, gull-wing leads, and moisture sensitivity level (MSL) 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847BW and NSVD148WT1G, BCR 148W H6433 uniquely balances AEC-Q101 compliance, integrated biasing, and thermal performance in SOT323-making it optimal for cost-sensitive, space-constrained automotive and industrial switching where design-in simplicity and qualification assurance are prioritized over ultra-low V_CE(sat) or wide h_FE spread.

Availability

BCR 148W H6433 is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor interfaces, LED status indicators, and PLC input conditioning requiring stable component supply and long-term lifecycle support.

Supply support for BCR 148W H6433 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 semiconductor expert focused on essential semiconductors, delivering high-performance, reliable, and efficient devices for automotive, industrial, and consumer markets.

The BCR148W belongs to Nexperia's Automotive Qualified Digital Transistors product line, engineered specifically for robust, low-component-count switching in harsh-environment control systems where AEC-Q101 validation and thermal resilience are mandatory.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The absolute maximum junction temperature (T_j) is 150 °C. Derating begins at T_S = 124 °C, where total power dissipation drops to 250 mW. Operation above this point requires thermal modeling using R_thJS ≤ 105 K/W and board-specific R_thSA values to ensure T_j remains within limit under worst-case ambient and airflow conditions.

Can BCR 148W H6433 replace a standard BJT like BC847 in existing designs?

Yes, but only if the circuit relies on internal base biasing. Unlike BC847, BCR 148W has integrated R1/R2 resistors tied to the base terminal. Direct substitution without removing external bias resistors will cause incorrect biasing and potential saturation failure. Layout revision is required to omit external R_B components.

Is the SOT323 package lead-free and RoHS compliant?

Yes. BCR 148W H6433 uses a Pb-free (RoHS-compliant) finish on its gull-wing leads and meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 requirements. The package material is halogen-free per IEC 61249-2-21, and no exemptions apply to its RoHS certification.

How does the resistor ratio R1/R2 affect switching consistency across temperature?

The R1/R2 ratio is specified as 0.9–1.1 at 25 °C and maintains tight tracking over –40 °C to +125 °C due to monolithic integration. This ensures consistent I_B division and predictable V_i(on)/V_i(off) thresholds across automotive temperature ranges, unlike discrete resistor pairs subject to mismatched TC.