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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

STMicroelectronics 2SD1047

Name: 2SD1047
Brand: STMicroelectronics
SKU: 2SD1047
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SD1047

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-3P-3, SC-65-3

Datasheet:: 2SD1047.pdf

Description:: TRANS NPN 140V 12A TO-3P

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SD1047 from STMicroelectronics is a high-power NPN epitaxial planar bipolar transistor using BiT-LA technology for linear amplifier applications, featuring V_CEO = 140 V, f_T = 20 MHz, and P_tot = 100 W at T_C = 25 °C; it operates reliably up to T_J = 150 °C and is used in high-voltage linear power supplies.

For engineers reviewing the 2SD1047 datasheet, 2SD1047 pinout, 2SD1047 application, or 2SD1047 equivalent, key selection criteria include safe operating area (SOA) compliance at 125 °C, collector current handling (I_C = 12 A continuous), thermal resistance (R_thj-case ≤ 1.25 °C/W), and gain linearity under linear bias conditions.

Technical Context

This device is optimized for linear amplification and high-voltage switching in analog power stages, with fully characterized electrical parameters at T_case = 125 °C - including h_FE ≥ 50 at I_C = 5 A and V_CE = 4 V, and V_CE(sat) = 0.7 V at I_C = 7 A / I_B = 700 mA.

The BiT-LA process ensures stable DC current gain across temperature and collector voltage, low leakage (I_CBO ≤ 0.1 µA at V_CB = 200 V), and controlled switching dynamics (t_on = 0.22 µs, t_stg = 4.3 µs, t_f = 0.5 µs under specified resistive-load test conditions).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	140 V - maximum sustainable collector-emitter voltage with base open; defines safe operation in high-voltage linear regulators.
f_T	20 MHz - transition frequency at I_C = 0.5 A, V_CE = 12 V; supports audio-frequency and broadband linear amplification.
P_tot	100 W at T_C = 25 °C - total power dissipation limit; requires heatsink design with R_thj-case ≤ 1.25 °C/W for full rating.
h_FE	60–200 - DC current gain range at I_C = 1 A / V_CE = 5 V; enables precise biasing in Class-AB output stages.
I_C	12 A - continuous collector current rating; supports high-current linear pass elements in regulated DC supplies.
R_thj-case	≤ 1.25 °C/W - junction-to-case thermal resistance; determines minimum heatsink thermal impedance for 150 °C max junction operation.

Pinout & Package

2SD1047 is housed in a TO-3P (also known as TO-218) metal package with isolated collector tab, designed for direct mounting to heatsinks. The case serves as the collector terminal (Pin 3), while emitter (Pin 1) and base (Pin 2) are leaded terminals.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink node	Low-impedance output path; connected to ground or load return in common-emitter configurations.
2 (Base)	Control input	Receives drive current (up to 700 mA peak) to saturate or linearly bias the transistor.
3 (Collector / Case)	High-voltage power node	Electrically connected to metal case; must be insulated from heatsink unless system grounding permits.

Key Features

Feature	Design Value
BiT-LA process technology	Enables superior h_FE linearity vs. V_CE and I_C, critical for low-distortion linear amplifiers.
150 °C maximum junction temperature	Supports operation in thermally constrained enclosures without derating below industrial ambient limits.
SOA-rated for linear operation	Guaranteed safe operation up to 140 V / 5 A with 10 ms pulse width, validated per Figure 2 in datasheet.
Low C_CBO = 150 pF	Minimizes Miller effect in high-gain amplifier stages, preserving bandwidth and stability margin.

Applications

Linear Audio Amplifier Output Stage

High-Voltage DC Power Supply Regulator

Use Scenario: Final output stage in Class-AB audio amplifiers delivering >50 W into 4 Ω loads.

IC Role / Device Role / Timing Role: NPN power transistor in complementary pair configuration, conducting during positive half-cycles with precise gain tracking.

Use Value: High h_FE linearity and low V_CE(sat) reduce crossover distortion and thermal drift in bias networks.

Use Scenario: Series pass element in adjustable linear power supplies delivering 0–100 V / 5 A.

IC Role / Device Role / Timing Role: High-voltage, high-current series regulator transistor dissipating up to 100 W under worst-case dropout.

Use Value: 140 V V_CEO and SOA compliance enable stable regulation even with 120 VAC-derived unregulated rails.

Industrial Motor Drive Pre-Driver

Test Equipment High-Power Bias Source

Use Scenario: Linear current source driving gate of high-side IGBTs in servo amplifier feedback loops.

IC Role / Device Role / Timing Role: Precision-controlled current sink providing stable 1–10 A gate charge/discharge currents.

Use Value: Tight I_CBO spec (≤0.1 µA) and stable h_FE ensure accurate current mirroring over temperature.

Use Scenario: Programmable DC load or calibration source in automated test systems requiring ±100 V / 10 A sourcing.

IC Role / Device Role / Timing Role: Primary power control element in four-quadrant electronic load modules.

Use Value: 20 A I_CM peak rating and fast switching (t_on/t_f < 0.5 µs) support dynamic load transient response.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-power NPN linear amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC2922	V_CEO = 120 V, f_T = 15 MHz, P_tot = 100 W, TO-3P	Lower breakdown margin; suitable only where input rail ≤ 100 V.	Select when lower cost and reduced voltage headroom are acceptable.
MJE13009	V_CEO = 400 V, f_T = 4 MHz, P_tot = 100 W, TO-218	Higher voltage rating but significantly lower f_T; unsuitable for audio-frequency linearity.	Prefer for high-voltage switching supplies where gain bandwidth is not critical.

Compared with 2SD1047, 2SC2922 trades 20 V breakdown margin for similar thermal performance, while MJE13009 sacrifices small-signal bandwidth for extreme voltage capability - making 2SD1047 optimal for linear amplification where both voltage headroom and gain fidelity matter.

Availability

2SD1047 is available at Aetrix Electronics and suitable for linear audio amplifiers, high-voltage DC power supply regulators, and industrial motor drive pre-drivers requiring stable component supply and long-term industrial lifecycle support.

Supply support for 2SD1047 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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The 2SD1047 belongs to ST's high-power bipolar transistor product line, engineered specifically for linear amplifier and high-voltage analog power applications demanding precision gain behavior and robust thermal performance.

FAQ

Is 2SD1047 suitable for switching-mode power supply (SMPS) applications?

No - while it supports resistive-load switching with t_on = 0.22 µs and t_f = 0.5 µs, its BiT-LA process prioritizes linear gain linearity over switching efficiency. It lacks optimized storage time control and exhibits higher saturation voltage than dedicated switching transistors like the MJE13009.

What is the recommended heatsink interface for TO-3P mounting?

Use electrically insulating thermal pads or mica washers with silicone-based thermal grease (e.g., Dow Corning TC-5022) between the TO-3P case and heatsink. Ensure mechanical clamping force of 20–30 N to maintain R_thj-case ≤ 1.25 °C/W; avoid conductive pastes that risk shorting the collector to chassis ground.

Does 2SD1047 have automotive qualification?

No - the datasheet specifies no AEC-Q101 stress testing or automotive-grade screening. It is rated for industrial temperature range (−65 °C to +150 °C) but lacks PPAP documentation, failure-in-time (FIT) data, or zero-defect sampling required for automotive use.

Can 2SD1047 be used in parallel configurations?

Yes - its positive temperature coefficient of V_CE(sat) enables inherent current sharing. However, external emitter resistors (0.1–0.22 Ω, 1% tolerance) are mandatory to balance static current distribution, especially at I_C > 5 A per device.

2SD1047 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-3P-3, SC-65-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 12 A

Voltage - Collector Emitter Breakdown (Max):: 140 V

Vce Saturation (Max) @ Ib, Ic:: 700mV @ 700mA, 7A

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 1A, 5V

Power - Max:: 100 W

Frequency - Transition:: 20MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-3P

2SD1047 FAQ

1.How can I place an order for 2SD1047 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD1047 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 2SD1047 reliable?

The price and inventory of 2SD1047 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SD1047 is usually 5 days.

3.What payment methods are accepted for 2SD1047?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1047 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD1047?

2SD1047 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD1047 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 2SD1047?

For technical support, including 2SD1047 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1047 requirements.

6.How does Aetrix verify that 2SD1047 is sourced from the original manufacturer or authorized distributors?

All 2SD1047 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 2SD1047 meets industry standards.

7.What is the process for return or replacement of 2SD1047?

All 2SD1047 units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1047, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 2SD1047 part is unused and in its original packaging.

Return procedure for 2SD1047:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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