STMicroelectronics 2SD882

Overview

2SD882 from STMicroelectronics is an NPN medium-power bipolar junction transistor in SOT-32 (TO-126) package, rated for 3 A continuous collector current, 30 V V_CEO, and 12.5 W total power dissipation at T_C = 25°C; used in relay drivers, audio power amplifiers, and DC-DC converter switching stages.

For engineers reviewing the 2SD882 datasheet, 2SD882 pinout, 2SD882 application, or 2SD882 equivalent, key selection criteria include saturation voltage at 3 A (1.1 V), DC current gain of 30–300 across 100 mA–3 A, rugged SOA compliance, and thermal resistance of 10 °C/W junction-to-case.

Technical Context

The 2SD882 employs planar epitaxial technology to achieve high ruggedness and stable gain over temperature. Its complementary PNP counterpart is the 2SB772, enabling push-pull and H-bridge configurations with matched thermal and electrical characteristics.

Designed for linear and switching operation, it supports pulsed collector currents up to 6 A (t_P < 5 ms) and operates reliably up to 150 °C junction temperature, with low V_CE(sat) (0.4 V @ 1 A/50 mA) minimizing conduction losses in power control circuits.

Key Specifications

Pinout & Package

SOT-32 (TO-126) is a 3-pin through-hole plastic package with metal tab for heatsinking; pin 1 = Emitter, pin 2 = Base, pin 3 = Collector (tab-connected). The metal tab is electrically connected to the collector terminal.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power transistor applications.

Compared with MJD882 and 2SC2073, the 2SD882 offers optimal balance of through-hole manufacturability, thermal performance via TO-126 tab, and complementary pairing-making it preferred for cost-sensitive, medium-power linear and switching designs requiring mechanical robustness and legacy compatibility.

Availability

2SD882 is available at Aetrix Electronics and suitable for relay driver circuits, audio power amplifier output stages, and DC-DC converter switches requiring stable component supply and long-term industrial availability.

Supply support for 2SD882 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, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The 2SD882 belongs to ST's legacy bipolar power transistor family, engineered for reliability in linear regulation, switching, and audio amplification where ruggedness, predictable gain, and thermal stability are critical.

FAQ

Is the 2SD882 RoHS-compliant and lead-free?

Yes, the 2SD882 is manufactured in ECOPACK® packages with lead-free second-level interconnect, compliant with RoHS Directive 2011/65/EU. The inner box label and package marking indicate the JEDEC JESD97-compliant eco-category.

Can the 2SD882 replace the 2N3055 in audio amplifier designs?

No-the 2N3055 has higher power (115 W) and voltage (60 V V_CEO) ratings. The 2SD882 is optimized for medium-power roles (12.5 W, 30 V); substituting it for 2N3055 risks thermal runaway and premature failure under equivalent loads.

What is the recommended base resistor value for switching a 500 mA relay at 5 V logic drive?

With h_FE ≥ 100 at I_C = 500 mA and V_BE(sat) ≈ 1.2 V, a 220 Ω base resistor delivers ~17 mA base current-ensuring saturation while staying within 1 A absolute max base current rating.

Does the metal tab on the SOT-32 package connect internally to any pin?

Yes-the collector (pin 3) is internally bonded to the metal tab. When mounted to a heatsink, electrical isolation (e.g., mica washer + shoulder washer) is mandatory unless the heatsink is held at collector potential.