STMicroelectronics 2STR2160

Overview

2STR2160 from STMicroelectronics is a PNP bipolar power transistor fabricated with PB-HCD (Power Bipolar High Current Density) technology, designed for low-voltage fast-switching applications. It delivers V_CE(sat) = 260 mV at I_C = −0.5 A / I_B = −50 mA, h_FE = 180–560 at I_C = −0.5 A, and supports I_C = −1 A continuous with T_J ≤ 150 °C - used in LED current control and relay driver stages.

For engineers reviewing the 2STR2160 datasheet, 2STR2160 pinout, 2STR2160 application, or 2STR2160 equivalent, key selection criteria include verified V_CE(sat) performance under high-current switching, thermal resistance (R_thJA = 250 °C/W), gain stability across I_C = −0.5 to −2 A, and SOT-23 footprint compatibility in space-constrained DC-DC and battery management layouts.

Technical Context

This PNP transistor operates as a saturated switch or linear current amplifier in low-side switching configurations. Its PB-HCD process enables simultaneous optimization of current gain (h_FE ≥ 45 at I_C = −1 A) and low saturation voltage (V_CE(sat) ≤ 480 mV at I_C = −1 A / I_B = −100 mA), critical for minimizing conduction loss in portable power rails.

With V_CEO = −60 V and V_EBO = −5 V, it targets sub-12 V systems where emitter-base reverse bias must be tightly controlled. Fast switching (t_on = 220 ns, t_off = 500 ns) is achieved under pulsed conditions (300 µs, ≤2% duty cycle), supporting PWM-driven motor and LED loads without significant switching loss.

Key Specifications

Pinout & Package

SOT-23 plastic surface-mount package (ECOPACK® compliant), 3-terminal, 1.3 mm height, footprint per Figure 2 (DS5868 Rev 4, p.6). Dimensions: D = 2.926 mm (max), E = 2.80 mm (typ), e = 0.95 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP power switching applications.

Compared with MMBT3906 and ZTX951, the 2STR2160 uniquely combines 1 A capability, SOT-23 footprint, and sub-300 mV saturation in a single device - making it the only option among the three qualified for high-efficiency, space-constrained 12 V load switching without derating or external heat sinking.

Availability

2STR2160 is available at Aetrix Electronics and suitable for LED drivers, battery charger load switches, and motor/relay drivers requiring stable component supply in high-volume consumer and industrial production.

Supply support for 2STR2160 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, MEMS, and microcontrollers for industrial, automotive, and consumer markets.

The 2STR2160 belongs to ST's "Low-Voltage Power Transistors" product line, engineered specifically for high-efficiency, high-density DC-DC and load-switching applications in battery-powered and space-constrained systems.

FAQ

What is the maximum continuous collector current for the 2STR2160 at 25 °C ambient?

The 2STR2160 supports I_C = −1 A continuous at T_A = 25 °C with derating above 25 °C per R_thJA = 250 °C/W. At 70 °C ambient, maximum continuous current drops to approximately −0.6 A to maintain T_J ≤ 150 °C, assuming standard 1 cm² PCB copper area.

Can the 2STR2160 replace the 2STR1160 NPN transistor in the same circuit?

No - the 2STR2160 is a PNP device and the 2STR1160 is its complementary NPN counterpart. They are not interchangeable without redesigning the biasing and topology (e.g., swapping high-side vs. low-side switch placement). Their pinouts are identical but polarity-sensitive.

Is the 2STR2160 RoHS-compliant and halogen-free?

Yes - the 2STR2160 is manufactured in ST's ECOPACK®-compliant SOT-23 package, meeting RoHS Directive 2011/65/EU and halogen-free requirements per IEC 61249-2-21, as confirmed in DS5868 Rev 4 (Section 3).

What is the recommended PCB footprint for the SOT-23 package of the 2STR2160?

The recommended footprint matches ST's SOT-23 outline in DS5868 Rev 4 (Figure 2, p.6): pad width 0.50 mm, length 1.20 mm, center-to-center pitch 0.95 mm, and 1.626 mm spacing between outer pads. Thermal pad is not included - thermal relief relies on copper area under the package body.