Nexperia USA Inc. PMBT5551-QVL

Overview

PMBT5551-QVL from Nexperia is an NPN high-voltage bipolar junction transistor in SOT23 package, rated for 160 V V_CEO, 300 mA I_C, and qualified to AEC-Q101 for automotive use. It serves as a robust switching or amplification device in high-voltage bias networks, ECU input conditioning, and LED driver stages where voltage headroom and thermal reliability are critical.

For engineers reviewing the PMBT5551-QVL datasheet, PMBT5551-QVL pinout, PMBT5551-QVL application, or PMBT5551-QVL equivalent, key selection criteria include verified V_CEO = 160 V, h_FE ≥ 80 at I_C = 1 mA, R_th(j-a) = 500 K/W on FR4, AEC-Q101 qualification status, and SOT23 footprint compatibility with automated assembly.

Technical Context

This discrete NPN transistor operates in linear or saturated switching modes with a maximum junction temperature of 150 °C and absolute maximum V_CBO = 180 V. Its DC current gain (h_FE) ranges from 80 (I_C = 1 mA) to 30 (I_C = 50 mA), and it delivers V_CE(sat) ≤ 200 mV at I_C = 50 mA / I_B = 5 mA.

Thermal performance is defined for standard FR4 PCB mounting (single-sided copper, tin-plated), yielding R_th(j-a) = 500 K/W. Cut-off leakage remains low: I_CBO ≤ 50 nA at 120 V and 25 °C, rising to 50 µA at 100 °C - critical for high-temperature automotive sensor interfaces.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, FR4-compatible footprint per Fig. 3 and Fig. 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847BW and MMBT5551, PMBT5551-QVL uniquely combines 160 V capability, AEC-Q101 compliance, and SOT23 manufacturability - making it the only choice for safety-critical 48 V automotive switching where qualification and voltage margin are non-negotiable.

Availability

PMBT5551-QVL is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor bias supplies, and LED driver stages requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for PMBT5551-QVL 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, with leadership in automotive-qualified components and advanced packaging.

The PMBT5551-QVL belongs to Nexperia's AEC-Q101-qualified high-voltage transistor family, engineered specifically for robust switching in 12 V/48 V automotive subsystems and industrial power interfaces.

FAQ

Is PMBT5551-QVL pin-compatible with standard SOT23 NPN transistors like BC846 or MMBT3904?

Yes - PMBT5551-QVL uses standard SOT23 pinning (1 = Base, 2 = Emitter, 3 = Collector), matching JEDEC TO-236AB layout. However, its 160 V V_CEO and AEC-Q101 qualification exceed those parts, so direct substitution requires verification of voltage margin and automotive compliance needs.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 100 mA (single pulse, t_p ≤ 1 ms). For continuous DC operation, I_B must be limited to ensure I_C ≤ 300 mA and P_tot ≤ 250 mW at T_amb ≤ 25 °C - typically requiring I_B ≤ 3 mA when h_FE ≥ 100.

Does PMBT5551-QVL support wave soldering, and what footprint is recommended?

Yes - Nexperia provides validated wave soldering footprints (Fig. 4) with 1.4 mm pad width, 2.2 mm length, and 4.5 mm spacing. The device is rated for standard SnPb and Pb-free reflow profiles per J-STD-020, with peak temperature ≤ 260 °C.

How does the thermal resistance change when mounted on a 2-layer PCB with internal ground plane?

Data sheet R_th(j-a) = 500 K/W assumes single-sided FR4. With a 2-layer board and internal copper pour, R_th(j-a) improves to ~350–400 K/W - enabling ~30 % higher continuous power dissipation at same ambient temperature, confirmed by Nexperia's thermal simulation models.