Nexperia USA Inc. BSR19A-QR

Overview

BSR19A-QR from Nexperia is an NPN high-voltage bipolar junction transistor in SOT23 package, rated for 160 V V_CEO, 300 mA I_C, and 250 mW P_tot, with DC current gain (h_FE) of 80–250 at 5 V/1–50 mA. It serves as a general-purpose switching and amplification device in telephony interface circuits and automotive signal conditioning stages.

For engineers reviewing the BSR19A-QR datasheet, BSR19A-QR pinout, BSR19A-QR application, or BSR19A-QR equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (500 K/W), transition frequency (100–300 MHz), and precise SOT23 terminal mapping - all critical for high-voltage analog switching design and automotive-grade reliability validation.

Technical Context

This discrete NPN transistor operates with open-base collector-emitter breakdown voltage up to 160 V and open-emitter collector-base voltage up to 180 V, enabling robust isolation in off-state telephony line drivers. Its h_FE spans 80–250 across 1–50 mA collector current, supporting stable biasing in linear amplifier configurations.

The device features low leakage: ICBO ≤ 50 nA at 25 °C and ≤ 50 µA at 100 °C, and exhibits V_CE(sat) ≤ 200 mV at IC = 50 mA / IB = 5 mA - confirming suitability for low-loss switching in power-constrained telecom interfaces.

Key Specifications

Pinout & Package

SOT23 plastic surface-mounted package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch); 3-terminal monolithic NPN transistor with standard JEDEC TO-236AB outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-voltage switching applications.

Compared with BC847BW and MMBT3904LT1G, BSR19A-QR uniquely combines 160 V breakdown, AEC-Q101 compliance, and SOT23 packaging - making it the only viable option for automotive and telecom applications demanding both high-voltage tolerance and functional safety assurance.

Availability

BSR19A-QR is available at Aetrix Electronics and suitable for telephony line interface, automotive door module switching, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.

Supply support for BSR19A-QR 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 high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.

The BSR19A-QR belongs to Nexperia's AEC-Q101-qualified high-voltage bipolar transistor family, engineered specifically for automotive signal integrity and telecom infrastructure applications where voltage robustness and thermal stability are critical.

FAQ

Is BSR19A-QR pin-compatible with standard SOT23 NPN transistors like BC847?

Yes - BSR19A-QR uses standard SOT23 pinout (1=Base, 2=Emitter, 3=Collector), matching BC847, MMBT3904, and other JEDEC TO-236AB devices. However, its 160 V V_CEO and AEC-Q101 qualification exceed those parts, so mechanical replacement is possible but electrical validation is required for voltage and reliability margins.

What is the maximum allowable junction temperature for continuous operation?

The absolute maximum junction temperature (T_j) is 150 °C per IEC 60134 limiting values. For reliable continuous operation, junction temperature must remain ≤150 °C - achievable up to 250 mW dissipation at ambient ≤25 °C, assuming R_th(j-a) = 500 K/W on FR4 PCB.

Does BSR19A-QR support pulsed operation beyond its DC current rating?

Yes - the device supports 600 mA peak collector current (I_CM) for single pulses ≤1 ms, enabling short-duration surge handling in relay driving or transient suppression circuits, provided average power stays within 250 mW limits and thermal cycling remains within specification.

How does the AEC-Q101 qualification impact design validation requirements?

AEC-Q101 qualification confirms the device passed stress tests including HTGB, HTRB, and ESD (HBM ≥2 kV), eliminating need for customer-level qualification in automotive applications. Designers must still verify board-level thermal performance, layout-induced parasitics, and system-level fault coverage per ISO 26262 ASIL requirements.