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

STMicroelectronics TIP142

Name: TIP142
Brand: STMicroelectronics
SKU: TIP142
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP142

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-247-3

Datasheet:: TIP142.pdf

Description:: TRANS NPN DARL 100V 10A TO-247

Quantity:: RFQ Add To RFQ list

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Inventory:4,061

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Product details

Overview

TIP142 from STMicroelectronics is an NPN complementary power Darlington transistor in TO-247 package, featuring monolithic Darlington configuration with integrated antiparallel collector-emitter diode, 100 V V_CEO, 10 A I_C, and 125 W P_TOT at T_case = 25 °C, used in high-current linear regulators and industrial motor control stages.

For engineers reviewing the TIP142 datasheet, TIP142 pinout, TIP142 application, or TIP142 equivalent, key selection criteria include saturation voltage (V_CE(sat) = 2 V @ IC = 5 A, IB = 10 mA), DC current gain (h_FE = 1000 @ IC = 5 A), thermal resistance (R_thJC ≤ 1 °C/W), and safe operating area for resistive load switching.

Technical Context

The TIP142 implements a planar "base island" layout with monolithic Darlington pairing, delivering high current gain and low saturation voltage through internal resistor network (R1 = 5 kΩ, R2 = 60 Ω). It includes an integrated antiparallel collector-emitter diode to support bidirectional current handling in inductive switching.

Designed for linear and switching operation up to 150 °C junction temperature, it supports pulse currents up to 20 A (I_CM) and exhibits turn-on/turn-off times of 0.9 µs and 4 µs respectively under specified resistive load test conditions (IC = 10 A, RL = 3 Ω).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - maximum collector-emitter voltage before breakdown under open-base condition, enabling use in 80 V DC bus applications.
I_C	10 A continuous - rated collector current defines steady-state power stage capacity for motor drivers or linear amplifiers.
P_TOT	125 W at T_case = 25 °C - total dissipation limit determines heatsink sizing for thermal management.
V_CE(sat)	2 V @ IC = 5 A, IB = 10 mA - low saturation voltage minimizes conduction loss in high-current switching.
h_FE	1000 @ IC = 5 A, V_CE = 4 V - high DC current gain reduces required base drive current, easing driver design.
R_thJC	≤ 1 °C/W - junction-to-case thermal resistance enables efficient heat transfer to external heatsink.
t_on/t_off	0.9 µs / 4 µs @ IC = 10 A, RL = 3 Ω - fast switching performance supports kHz-range PWM control without excessive switching loss.

Pinout & Package

Package: TO-247 - three-terminal through-hole power package with isolated metal tab (collector) and 1° lead pitch, optimized for high-power thermal and mechanical reliability.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input	Drives Darlington pair via internal 5 kΩ series resistor; requires ~10 mA for full saturation at 5 A output.
2 (Collector)	High-current output node	Electrically connected to metal tab; must be insulated from heatsink unless referenced to system ground.
3 (Emitter)	Current return path	Common emitter connection; internal antiparallel diode cathode tied to collector, anode to emitter.

Key Features

Feature	Design Value
Monolithic Darlington configuration	Single-die integration eliminates interconnect parasitics and ensures matched transistor characteristics for stable gain and thermal tracking.
Integrated antiparallel C–E diode	Enables freewheeling current path in inductive loads without external diode, reducing BOM count and PCB footprint.
Planar "base island" technology	Improves ruggedness and secondary breakdown immunity versus older epitaxial base processes, supporting reliable operation in linear mode.
ECOPACK®-compliant TO-247	Meets RoHS and halogen-free requirements without compromising thermal or electrical performance in industrial environments.

Applications

DC Motor Driver Stage

Linear Regulator Pass Element

Use Scenario: High-current H-bridge half-bridge leg driving 24–48 V brushed DC motors in factory automation systems.

IC Role / Device Role / Timing Role: NPN Darlington switch providing 10 A continuous collector current with low V_CE(sat) to minimize heat generation during PWM conduction.

Use Value: Integrated antiparallel diode handles back-EMF recirculation, eliminating need for discrete flyback diode and reducing layout complexity.

Use Scenario: Series pass transistor in adjustable 0–30 V, 5 A bench power supply with analog feedback control.

IC Role / Device Role / Timing Role: Linear-mode power transistor dissipating up to 125 W with R_thJC ≤ 1 °C/W, requiring minimal heatsink volume.

Use Value: High h_FE (1000) reduces base drive current demand, simplifying error amplifier and current-limit circuit design.

Industrial Heater Controller

Relay Replacement Circuit

Use Scenario: Solid-state replacement for electromechanical contactors controlling 1–3 kW resistive heating elements in ovens and furnaces.

IC Role / Device Role / Timing Role: Switching element operating in saturated mode at 50/60 Hz AC line-synchronized bursts, leveraging low V_CE(sat) and high I_CM.

Use Value: 20 A peak current rating supports surge currents during cold-start of heating elements without derating.

Use Scenario: Low-component-count solid-state relay module for PLC output cards switching 24 V DC solenoid valves.

IC Role / Device Role / Timing Role: High-gain Darlington switch replacing mechanical relay, driven directly by microcontroller GPIO with no external driver stage.

Use Value: Internal base resistor network (5 kΩ) allows direct TTL/CMOS-level interface, reducing component count and board space.

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 (750 typ.), TO-3 package with higher R_thJC (1.5 °C/W)	Better suited for 100 V bus systems but requires larger heatsink and stronger base drive	Select when higher voltage margin is critical and thermal budget allows larger package
BDW83C	Same TO-247 package, lower I_C (8 A), higher V_CE(sat) (2.5 V @ 5 A), no integrated diode	Requires external flyback diode; less suitable for inductive switching without added components	Choose only if cost sensitivity outweighs design simplicity and thermal efficiency

Compared with MJ11016 and BDW83C, the TIP142 delivers optimal balance of voltage rating, current capability, thermal efficiency, and integrated protection-making it preferred for compact, high-reliability industrial switching where base drive simplicity and SOA robustness are essential.

Availability

TIP142 is available at Aetrix Electronics and suitable for industrial motor control, linear power regulation, heater actuation, and solid-state relay replacement requiring stable component supply across long-lifecycle production programs.

Supply support for TIP142 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 TIP142 belongs to ST's high-voltage, high-current bipolar power transistor product line, engineered specifically for ruggedized industrial switching and linear power applications demanding high gain, low saturation, and proven thermal reliability.

FAQ

Is the TIP142 pin-compatible with the TIP147?

No. The TIP142 (NPN) and TIP147 (PNP) share identical TO-247 mechanical packaging and terminal numbering, but their internal polarity and biasing requirements differ. Pin 1 is base for both, pin 2 is collector (NPN) or emitter (PNP), and pin 3 is emitter (NPN) or collector (PNP). Direct substitution without circuit reconfiguration will cause functional failure.

Does the integrated antiparallel diode support reverse current in all operating modes?

Yes-the internal diode is connected anode-to-emitter and cathode-to-collector, enabling conduction from emitter to collector during inductive flyback. It is rated for full I_C (10 A) continuous and I_CM (20 A) peak, matching the transistor's current capability without derating.

What is the safe operating area (SOA) limitation at 100 °C case temperature?

At T_case = 100 °C, the maximum continuous collector current drops to approximately 6.5 A at V_CE = 10 V, per the SOA curve in Figure 2 of the datasheet. Derating follows a linear thermal limit above 25 °C, constrained by R_thJC ≤ 1 °C/W and T_J(max) = 150 °C.

Can the TIP142 be used in parallel configurations for higher current?

Yes, but only with emitter ballast resistors (typically 0.1–0.22 Ω) to ensure current sharing. The planar base island structure improves thermal uniformity, yet inherent parameter spread (h_FE, V_BE(on)) necessitates external balancing to prevent thermal runaway in multi-device arrangements.

TIP142 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-247-3

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:: 125 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247

TIP142 FAQ

1.How can I place an order for TIP142 through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP142 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 TIP142 reliable?

The price and inventory of TIP142 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP142 is usually 5 days.

3.What payment methods are accepted for TIP142?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP142 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP142?

TIP142 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP142 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 TIP142?

For technical support, including TIP142 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP142 requirements.

6.How does Aetrix verify that TIP142 is sourced from the original manufacturer or authorized distributors?

All TIP142 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 TIP142 meets industry standards.

7.What is the process for return or replacement of TIP142?

All TIP142 units undergo pre-shipment inspection (PSI). If there is an issue with TIP142, 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 TIP142 part is unused and in its original packaging.

Return procedure for TIP142:

1.Submit a request within 90 days.

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

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