onsemi BD38010STU

Overview

BD38010STU from Fairchild Semiconductor is a PNP epitaxial silicon transistor rated for -100 V collector-base voltage, -80 V collector-emitter voltage, -2 A DC collector current, 25 W collector dissipation at TC=25°C, and 150°C junction temperature-designed for medium-power linear amplification and switching in industrial power supplies and motor control circuits.

For engineers reviewing the BD38010STU datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-126 package, hFE range of 150–375 at IC = -1 A, VCE(sat) ≤ -1 V, VBE(on) ≈ -1.5 V, and safe operating area validated up to -10 A pulse with derating above 25°C case temperature.

Technical Context

This PNP bipolar junction transistor operates in active, saturation, and cutoff regions with specified DC current gain (hFE) across two test conditions: 40–375 at IC = -0.15 A and 20–250 at IC = -1 A. Its breakdown voltages are defined under controlled leakage conditions (IC = -100 µA for BVCBO; IC = -100 mA for VCEO(sus)).

The device features fast switching performance with 50 ns turn-on and 500 ns turn-off times under standardized RL-loaded pulse conditions (VCC = -30 V, IC = -0.5 A, IB1 = IB2 = -0.05 A), and thermal derating follows a linear 0.2 W/°C reduction beyond TC = 25°C per the power derating curve.

Key Specifications

Pinout & Package

BD38010STU is housed in a TO-126 plastic package with three leads: Emitter (Lead 1), Collector (Lead 2), Base (Lead 3). The package features a metal tab for mechanical mounting and thermal conduction, with standardized dimensions including 16.10 mm length, 13.06 mm width, and 4.2 mm height (max).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MJD32C and BD380, BD38010STU offers optimal fit for space-constrained TO-126 designs requiring -80 V/–2 A capability, while BD380 provides identical performance with standard marking, and MJD32C trades package size for higher current headroom.

Availability

BD38010STU is available at Aetrix Electronics and suitable for industrial power supplies, motor control modules, and lamp/solenoid driver circuits requiring stable component supply and long-term manufacturability.

Supply support for BD38010STU 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog and discrete power devices, acquired by ON Semiconductor in 2016. Its legacy products remain widely used in industrial and automotive applications.

BD38010STU belongs to the BD376/378/380 family of medium-power PNP transistors designed specifically for linear regulation and robust switching in cost-sensitive industrial equipment where reliability and thermal stability are critical.

FAQ

What is the package type and pin configuration of BD38010STU?

BD38010STU uses the TO-126 plastic package with three leads: Lead 1 is Emitter, Lead 2 is Collector, and Lead 3 is Base. The metal tab is electrically connected to the collector and serves as both mechanical anchor and thermal path. Pinout matches standard TO-126 orientation when viewed with tab facing down and leads pointing downward.

What is the guaranteed hFE range for BD38010STU at IC = -1 A?

The BD38010STU has a guaranteed DC current gain (hFE) range of 150 to 375 when tested at VCE = -2 V and IC = -1 A. This classification corresponds to the "25" hFE group in the BD376/378/380 family datasheet, ensuring predictable base drive requirements for saturated switching applications.

Does BD38010STU support pulsed operation, and what are the limits?

Yes, BD38010STU supports pulsed collector current up to -3 A under pulse test conditions (PW = 350 µs, duty cycle = 2%). Its safe operating area (SOA) chart confirms capability up to -10 A for short pulses at reduced VCE, provided case temperature remains within derated limits and thermal mass prevents junction overheating.

Is BD38010STU pin-compatible with BD379 or other complementary NPN transistors?

No, BD38010STU is not pin-compatible with BD379 (NPN) due to opposite polarity and differing internal structure. While BD38010STU and BD379 are complementary in function and often used together in push-pull stages, their pinouts differ: BD379 uses E-C-B order in TO-126, whereas BD38010STU uses E-C-B but with PNP polarity-requiring careful PCB layout separation and reversed biasing.

What is the maximum allowable junction temperature and how does it affect lifetime?

The BD38010STU has a maximum junction temperature (TJ) rating of 150°C. Operating continuously near this limit accelerates parametric drift and reduces long-term reliability; derating to ≤125°C junction temperature is recommended for >10-year field life in industrial environments. Thermal design must account for PC derating above TC = 25°C (0.2 W/°C).