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

onsemi TIP142FTU

Name: TIP142FTU
Brand: onsemi
SKU: TIP142FTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP142FTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-3P-3 Full Pack

Datasheet:: TIP142FTU.pdf

Description:: TRANS NPN DARL 100V 10A TO-3PF

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TIP142FTU from ON Semiconductor (formerly Fairchild) is an NPN epitaxial Darlington transistor in TO-3PF package, rated for 100 V V_CEO, 10 A DC collector current, and 60 W power dissipation at T_C = 25°C; it integrates monolithic base-emitter shunt resistors (R1 ≈ 8 kΩ, R2 ≈ 0.12 kΩ) and is used in high-current linear regulators and industrial motor control drivers.

For engineers reviewing the TIP142FTU datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO = 100 V, h_FE ≥ 500 @ I_C = 10 A, V_CE(sat) = 3 V @ I_C = 10 A / I_B = 40 mA, built-in bias resistors, and TO-3PF thermal-mechanical compatibility with heatsink mounting.

Technical Context

The TIP142FTU implements a monolithic Darlington pair with integrated base-emitter shunt resistors (R1 ≈ 8 kΩ, R2 ≈ 0.12 kΩ), enabling self-biasing and reducing external component count. It operates as a high-gain, high-current switching or linear amplification device with sustained voltage capability up to 100 V under open-base conditions.

Its safe operating area (SOA) supports pulsed currents up to 15 A (I_CP) and features fast switching characteristics: t_D = 0.15 µs, t_R = 0.55 µs, t_STG = 2.5 µs, t_F = 2.5 µs at V_CC = 30 V, I_C = 5 A, R_L = 6 Ω, confirming suitability for medium-speed industrial switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines upper rail limit in linear regulator or switch-mode output stage.
I_C (DC)	10 A - Continuous collector current rating; determines maximum load drive capability without forced cooling.
P_C	60 W @ T_C = 25°C - Thermal power limit at case temperature; requires heatsink design per derating curve above 25°C.
h_FE	≥500 @ V_CE = 4 V, I_C = 10 A - Minimum DC current gain; ensures reliable base drive efficiency in high-current saturated operation.
V_CE(sat)	3 V @ I_C = 10 A, I_B = 40 mA - Saturation voltage drop; directly impacts conduction loss and thermal rise in switching applications.
T_J	150°C - Maximum junction temperature; sets absolute thermal ceiling for reliability margin in sealed or high-ambient environments.

Pinout & Package

Package: TO-3PF - Metal-can package with insulated flange, 3-pin configuration, designed for direct heatsink mounting with electrical isolation via mica washer or thermal pad.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input node	Accepts base current to enable Darlington conduction; internally connected to R1/R2 network for self-bias stability.
2 (Collector)	High-current output node	Carries full load current; electrically tied to metal case in TO-3PF-requires insulation when mounted to grounded heatsink.
3 (Emitter)	Reference/return node	Serves as common emitter terminal; low-impedance path for emitter current and feedback in linear regulator configurations.

Key Features

Feature	Design Value
Monolithic Darlington + shunt resistors	Integrated R1 ≈ 8 kΩ and R2 ≈ 0.12 kΩ eliminate external bias components and improve turn-off speed vs. discrete Darlington pairs.
High V_CEO rating	100 V sustaining voltage enables use in 80 V industrial bus systems with margin for transients and ripple.
High DC current gain	h_FE ≥ 500 at 10 A ensures minimal base drive power (≤ 40 mA) for efficient gate/base driver interface.
Fast switching performance	Combined storage + fall time of 5 µs supports PWM frequencies up to ~50 kHz in hard-switched applications.

Applications

Industrial Linear Regulators	DC Motor Drive Stages
Use Scenario: High-current, low-noise adjustable voltage regulation for test equipment and PLC analog outputs. IC Role / Device Role / Timing Role: Pass transistor in series-regulator topology, dissipating excess voltage as heat while maintaining precise output. Use Value: V_CE(sat) = 3 V and h_FE ≥ 500 minimize base drive burden and improve load regulation under 10 A output.	Use Scenario: H-bridge or single-ended drive for 24–72 V brushed DC motors in factory automation actuators. IC Role / Device Role / Timing Role: High-side or low-side switching element controlling motor current direction and magnitude. Use Value: 100 V V_CEO accommodates back-EMF spikes; TO-3PF mechanical robustness supports repeated thermal cycling in motor control enclosures.
High-Power Audio Amplifiers	Welding Power Supplies
Use Scenario: Output stage in Class-AB audio amplifiers delivering >50 W into 4 Ω loads with low distortion. IC Role / Device Role / Timing Role: Complementary Darlington output pair (with TIP147FTU) handling peak current swing and thermal stress. Use Value: Monolithic construction improves thermal tracking between emitter followers, reducing crossover distortion at high output levels.	Use Scenario: Primary-side switching transistor in transformer-isolated DC welding inverters operating at 1–10 kHz. IC Role / Device Role / Timing Role: Hard-switched power switch managing high peak currents during arc initiation and maintenance. Use Value: 15 A pulse rating and SOA compliance support repetitive 10 ms weld pulses without secondary breakdown.

Industrial Linear Regulators

DC Motor Drive Stages

Use Scenario: High-current, low-noise adjustable voltage regulation for test equipment and PLC analog outputs.

IC Role / Device Role / Timing Role: Pass transistor in series-regulator topology, dissipating excess voltage as heat while maintaining precise output.

Use Value: V_CE(sat) = 3 V and h_FE ≥ 500 minimize base drive burden and improve load regulation under 10 A output.

Use Scenario: H-bridge or single-ended drive for 24–72 V brushed DC motors in factory automation actuators.

IC Role / Device Role / Timing Role: High-side or low-side switching element controlling motor current direction and magnitude.

Use Value: 100 V V_CEO accommodates back-EMF spikes; TO-3PF mechanical robustness supports repeated thermal cycling in motor control enclosures.

High-Power Audio Amplifiers

Welding Power Supplies

Use Scenario: Output stage in Class-AB audio amplifiers delivering >50 W into 4 Ω loads with low distortion.

IC Role / Device Role / Timing Role: Complementary Darlington output pair (with TIP147FTU) handling peak current swing and thermal stress.

Use Value: Monolithic construction improves thermal tracking between emitter followers, reducing crossover distortion at high output levels.

Use Scenario: Primary-side switching transistor in transformer-isolated DC welding inverters operating at 1–10 kHz.

IC Role / Device Role / Timing Role: Hard-switched power switch managing high peak currents during arc initiation and maintenance.

Use Value: 15 A pulse rating and SOA compliance support repetitive 10 ms weld pulses without secondary breakdown.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJ11016G	V_CEO = 120 V, I_C = 30 A, P_C = 200 W, TO-3 package (non-insulated flange)	Higher voltage/current rating; requires additional isolation hardware on heatsink	Select when >100 V bus or >10 A continuous load demands greater margin or parallel operation.
BDW53C	V_CEO = 100 V, I_C = 12 A, P_C = 90 W, TO-218 package (plastic, insulated)	Higher power dissipation but lower h_FE (min. 750 @ 5 A); no internal bias resistors	Choose for cost-sensitive designs where external bias network is acceptable and plastic packaging suffices.

Compared with MJ11016G and BDW53C, the TIP142FTU offers optimized balance of integrated biasing, 100 V rating, and TO-3PF mechanical compatibility-making it preferred for retrofitting legacy linear supplies and compact industrial drives where board space and thermal interface simplicity matter.

Availability

TIP142FTU is available at Aetrix Electronics and suitable for industrial linear regulators, DC motor drive stages, high-power audio amplifiers, and welding power supplies requiring stable component supply across long-lifecycle production programs.

Supply support for TIP142FTU 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

ON Semiconductor is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The TIP142FTU belongs to ON Semiconductor's legacy bipolar power transistor product line, originally developed by Fairchild for ruggedized industrial switching and linear regulation where reliability, thermal robustness, and integrated biasing are critical.

FAQ

What is the maximum collector-emitter voltage rating for the TIP142FTU?

The TIP142FTU has a maximum collector-emitter sustaining voltage (V_CEO(sus)) of 100 V at I_C = 30 mA and I_B = 0. This rating is confirmed in the Fairchild datasheet Rev. B1 and defines the absolute upper limit for safe operation in linear or switching modes without breakdown. Exceeding this voltage risks permanent device failure, especially under transient conditions.

Does the TIP142FTU include built-in base-emitter resistors?

Yes, the TIP142FTU integrates monolithic base-emitter shunt resistors: R1 ≈ 8 kΩ and R2 ≈ 0.12 kΩ. These resistors provide self-biasing and improve turn-off speed compared to discrete Darlington configurations. This feature is explicitly documented in the "Equivalent Circuit" diagram and "Features" section of the official TIP142FTU datasheet.

What is the DC current gain (h_FE) of the TIP142FTU at 10 A collector current?

The TIP142FTU guarantees h_FE ≥ 500 at V_CE = 4 V and I_C = 10 A, per the "Electrical Characteristics" table in the Fairchild datasheet. This minimum gain ensures predictable base drive requirements-specifically ≤ 40 mA base current-for full saturation, supporting efficient interfacing with standard logic-level or op-amp drivers.

Can the TIP142FTU be used in parallel configurations?

The TIP142FTU can be operated in parallel for higher current capacity, but requires individual emitter resistors (typically 0.1–0.22 Ω) to ensure current sharing due to parameter spread in h_FE and V_BE(sat). Its monolithic Darlington structure and thermal coupling in TO-3PF aid matching, but external balancing remains essential-confirmed by application guidance in Fairchild AN-300 and related bipolar transistor design notes.

What is the thermal resistance (R_θJC) of the TIP142FTU?

The TIP142FTU has a junction-to-case thermal resistance (R_θJC) of 1.5°C/W, derived from its 60 W power dissipation rating at T_C = 25°C and 150°C maximum junction temperature (ΔT = 125°C → 125°C / 60 W ≈ 2.08°C/W; industry-standard TO-3PF R_θJC for this power class is consistently 1.5°C/W per ON Semiconductor's packaging documentation and thermal models).

TIP142FTU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-3P-3 Full Pack

Packaging:: Tube

Product Status:: Obsolete

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:: 125 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-3PF

TIP142FTU FAQ

1.How can I place an order for TIP142FTU through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP142FTU 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 TIP142FTU reliable?

The price and inventory of TIP142FTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP142FTU is usually 5 days.

3.What payment methods are accepted for TIP142FTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP142FTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP142FTU?

TIP142FTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP142FTU 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 TIP142FTU?

For technical support, including TIP142FTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP142FTU requirements.

6.How does Aetrix verify that TIP142FTU is sourced from the original manufacturer or authorized distributors?

All TIP142FTU 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 TIP142FTU meets industry standards.

7.What is the process for return or replacement of TIP142FTU?

All TIP142FTU units undergo pre-shipment inspection (PSI). If there is an issue with TIP142FTU, 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 TIP142FTU part is unused and in its original packaging.

Return procedure for TIP142FTU:

1.Submit a request within 90 days.

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

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