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

STMicroelectronics TIP142T

Name: TIP142T
Brand: STMicroelectronics
SKU: TIP142T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP142T

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: TIP142T.pdf

Description:: TRANS NPN DARL 100V 10A TO-220

Quantity:: RFQ Add To RFQ list

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Inventory:8,865

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Product details

Overview

TIP142T from STMicroelectronics is an NPN complementary power Darlington transistor in TO-220 package, featuring monolithic Darlington configuration with integrated antiparallel collector-emitter diode, 100 V V_CEO, 10 A I_C, and 90 W P_TOT at T_case = 25 °C, used in high-current linear regulators and industrial motor control stages.

For engineers reviewing the TIP142T datasheet, TIP142T pinout, TIP142T application, or TIP142T equivalent, key selection criteria include guaranteed h_FE ≥ 500 at I_C = 10 A, V_CE(sat) ≤ 3 V under same conditions, thermal resistance R_thJC ≤ 1.4 °C/W, and built-in clamping diode for inductive load switching.

Technical Context

The TIP142T implements a monolithic Darlington pair with base-island planar technology, delivering high DC current gain (h_FE ≥ 500 at I_C = 10 A) and low saturation voltage (V_CE(sat) ≤ 3 V). Its integrated antiparallel collector-emitter diode enables self-clamped switching in inductive loads without external flyback components.

Designed for linear and switching operation up to 150 °C junction temperature, it supports pulsed collector currents up to 20 A (I_CM) and withstands 100 V collector-base and collector-emitter blocking voltages (V_CBO/V_CEO), meeting industrial equipment reliability requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - maximum continuous collector-emitter voltage before breakdown under open-base condition
I_C	10 A - continuous DC collector current rating at T_case = 25 °C
h_FE	≥500 - minimum DC current gain at I_C = 10 A, V_CE = 4 V, ensuring robust drive efficiency
V_CE(sat)	≤3 V - max saturation voltage at I_C = 10 A, I_B = 40 mA, limiting conduction loss
R_thJC	≤1.4 °C/W - junction-to-case thermal resistance, enabling effective heatsink coupling
P_TOT	90 W - total power dissipation at T_case = 25 °C, defining thermal design margin

Pinout & Package

Package: TO-220 (Type A), 3-pin through-hole, tab-connected to collector, RoHS-compliant ECOPACK® grade.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal of Darlington pair	Low-impedance output node; connects to load return or ground reference
2 (Base)	Control input for Darlington pair	Drives internal base resistor network (R1 ≈ 5 kΩ, R2 ≈ 60 Ω); requires ~40 mA for full saturation
3 (Collector / Tab)	Main current-carrying terminal	Electrically connected to metal tab; must be isolated from chassis unless collector is system ground

Key Features

Feature	Design Value
Monolithic Darlington structure	Single-die integration eliminates inter-device mismatch and improves thermal tracking vs. discrete pairs
Integrated antiparallel C-E diode	Eliminates need for external flyback diode in relay/motor driver circuits
Planar "base island" layout	Enables stable h_FE and low V_CE(sat) across temperature and production lots
High surge current capability	20 A I_CM rating supports short-duration motor startup or fault transients

Applications

Industrial Motor Drivers

Linear Power Regulators

Use Scenario: Driving 5–15 A DC motors in conveyor systems and valve actuators with PWM or on/off control.

IC Role / Device Role / Timing Role: Main power switch handling bidirectional current flow during commutation, leveraging integrated C-E diode for back-EMF clamping.

Use Value: Reduces BOM count by eliminating external flyback diodes and simplifies PCB layout for high-reliability industrial motion control.

Use Scenario: Pass element in adjustable 0–30 V, 5–10 A linear bench power supplies.

IC Role / Device Role / Timing Role: High-gain series pass transistor regulating output voltage via feedback-controlled base drive.

Use Value: Delivers stable regulation with minimal base drive current due to h_FE ≥ 500, reducing error amplifier loading.

Switch-Mode Power Supply Aux. Supplies

Welding Equipment Output Stages

Use Scenario: 24 V/5 A auxiliary bias supply in telecom rectifiers and UPS systems.

IC Role / Device Role / Timing Role: Linear post-regulator after main SMPS stage, providing low-noise, ripple-free output.

Use Value: Low V_CE(sat) (≤3 V) minimizes dropout and heat generation at full load, improving efficiency over standard BJTs.

Use Scenario: Primary switching element in single-phase AC/DC welder output inverters.

IC Role / Device Role / Timing Role: High-current switching device operating in hard-switched mode with repetitive 10–20 A pulses.

Use Value: 150 °C max junction temperature and 1.4 °C/W R_thJC support sustained duty cycles without derating in compact enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJ11016	Higher V_CEO (120 V), lower h_FE (min. 1000 but wider spread), TO-3 package	Requires larger heatsink due to TO-3 thermal path; better for higher-voltage snubberless designs	Select when >100 V blocking or legacy TO-3 mechanical fit is required
TIP122	Lower I_C (5 A), lower P_TOT (65 W), same TO-220 footprint	Not suitable for continuous 10 A loads; limited to medium-power switching	Choose only for cost-sensitive, lower-current (<5 A) replacements where thermal margin allows

Compared with MJ11016 and TIP122, the TIP142T uniquely balances 10 A continuous current, 100 V rating, TO-220 mountability, and integrated clamping-making it optimal for space-constrained industrial drivers requiring no external diode.

Availability

TIP142T is available at Aetrix Electronics and suitable for industrial motor drivers, linear power regulators, welding equipment output stages, and switch-mode power supply auxiliary supplies requiring stable component supply across long-lifecycle production programs.

Supply support for TIP142T 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 TIP142T belongs to ST's high-power bipolar transistor product line, engineered specifically for ruggedized industrial switching and linear regulation where reliability, thermal performance, and integrated protection are critical.

FAQ

Is the TIP142T pin-compatible with the TIP122?

Yes, both use identical TO-220 pinout (E-B-C), but TIP142T delivers double the continuous collector current (10 A vs. 5 A) and higher power dissipation (90 W vs. 65 W). Direct replacement is possible only if thermal design accommodates the higher power and load current.

Does the integrated antiparallel diode support reverse current in H-bridge configurations?

No-the internal diode is collector-to-emitter (C→E), not emitter-to-collector. It conducts only during inductive flyback when collector voltage exceeds emitter voltage. It does not support bidirectional current flow or active freewheeling in full H-bridge topologies.

What is the recommended base drive for reliable saturation at 10 A load?

Apply ≥40 mA DC base current (IB) with V_BE(on) ≥ 3 V to ensure V_CE(sat) ≤ 3 V. Use a series base resistor calculated from driver voltage minus 3 V, accounting for R1 (5 kΩ) and R2 (60 Ω) internal resistors shown in Figure 1.

Can the TIP142T be used in parallel for higher current?

Parallel operation is not recommended due to unequal current sharing caused by h_FE variation and thermal runaway risk. ST does not specify matching or derating guidelines for paralleling; discrete current-sharing resistors or dedicated current-balancing ICs are required if attempted.

TIP142T Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Transistor Type:: NPN - Darlington

Current - Collector (Ic) (Max):: 10 A

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 3V @ 40mA, 10A

Current - Collector Cutoff (Max):: 2mA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 1000 @ 5A, 4V

Power - Max:: 80 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

TIP142T FAQ

1.How can I place an order for TIP142T through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP142T 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 TIP142T reliable?

The price and inventory of TIP142T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP142T is usually 5 days.

3.What payment methods are accepted for TIP142T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP142T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP142T?

TIP142T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP142T 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 TIP142T?

For technical support, including TIP142T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP142T requirements.

6.How does Aetrix verify that TIP142T is sourced from the original manufacturer or authorized distributors?

All TIP142T 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 TIP142T meets industry standards.

7.What is the process for return or replacement of TIP142T?

All TIP142T units undergo pre-shipment inspection (PSI). If there is an issue with TIP142T, 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 TIP142T part is unused and in its original packaging.

Return procedure for TIP142T:

1.Submit a request within 90 days.

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

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