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

onsemi TIP142

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

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Part No.:: TIP142

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-247-3

Datasheet:: TIP142.pdf

Description:: TRANS NPN DARL 100V 10A TO-247-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TIP142 from ON Semiconductor is an NPN Darlington silicon power transistor designed for high-current, low-frequency switching and linear amplifier applications. It delivers 10 A continuous collector current, sustains 100 Vdc collector-emitter voltage (V_CEO(sus)), and provides minimum DC current gain (h_FE) of 1000 at I_C = 5.0 A and V_CE = 4 V - enabling robust drive capability in motor control and power supply output stages.

For engineers reviewing the TIP142 datasheet, pinout, applications, or equivalent options, key selection considerations include its 100 V blocking rating, monolithic Darlington structure with built-in base-emitter shunt resistor, thermal resistance of 1.0 °C/W (junction-to-case), TO-218 package compatibility, and suitability for unclamped inductive load handling up to 100 mJ.

Technical Context

The TIP142 integrates two cascaded NPN transistors in a monolithic Darlington configuration with an internal ~8.0 kΩ base-emitter shunt resistor, reducing external bias complexity. Its safe operating area (SOA) is defined by both thermal limits (125 W at T_C = 25°C) and secondary breakdown constraints, with peak unclamped inductive energy rating of 100 mJ.

Electrical behavior is characterized by low saturation voltage (V_CE(sat) ≤ 2.0 V at I_C = 5.0 A, I_B = 10 mA), high input impedance due to Darlington gain, and specified switching times (t_d = 0.15 µs, t_r = 0.55 µs, t_s = 2.5 µs, t_f = 2.5 µs) under resistive-load conditions at 30 V and 5 A.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO(sus)	100 Vdc minimum - enables use in 80 V rail systems with margin against transients
I_C (continuous)	10 A - supports high-power loads such as solenoids, relay drivers, and audio output stages
h_FE (min)	1000 @ I_C = 5.0 A, V_CE = 4 V - reduces required base drive current to ≤10 mA for full conduction
V_CE(sat)	≤2.0 V @ I_C = 5.0 A, I_B = 10 mA - limits conduction loss to ≤10 W at rated current
R_θJC	1.0 °C/W - allows direct heatsink mounting with predictable junction temperature rise
P_D (T_C = 25°C)	125 W - defines maximum dissipation before thermal derating begins
Unclamped Inductive Energy	100 mJ - specifies safe energy handling without snubber in relay or inductive load switching

Pinout & Package

SOT-93 (TO-218) package with isolated metal tab (collector-connected), standardized 4-pin layout optimized for mechanical stability and thermal transfer in high-power PCB mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input node; accepts low-current drive (≤500 mA continuous) to switch 10 A collector current
2	Collector	Main high-current output path; electrically connected to metal tab for heatsinking
3	Emiter	Power return path; referenced to system ground in common-emitter configurations
4	Collector	Second collector terminal - paralleled internally with Pin 2 to enhance current handling and thermal distribution

Key Features

Feature	Design Value
Monolithic Darlington construction	Integrates driver and output transistors on one die, eliminating discrete assembly and ensuring matched thermal tracking
Built-in base-emitter shunt resistor	~8.0 kΩ resistor ensures reliable turn-off without external pull-down, critical in noisy industrial environments
100 Vdc V_CEO(sus) rating	Supports operation in 72–80 V battery systems and industrial 100 V bus designs with safety margin
125 W power dissipation (T_C = 25°C)	Enables high-output linear amplifiers and high-duty-cycle switching without forced air cooling
TO-218 metal-tab package	Provides low thermal resistance path (R_θJC = 1.0 °C/W) and mechanical rigidity for vibration-prone applications

Applications

DC Motor Control	Linear Power Amplifier
Use Scenario: Driving brushed DC motors in industrial actuators requiring 5–10 A peak current and 60–100 V supply rails. IC Role / Device Role / Timing Role: High-current NPN switch controlling motor direction and speed via PWM or analog voltage. Use Value: 100 V V_CEO(sus) withstands back-EMF spikes; 1000 h_FE minimizes microcontroller GPIO loading.	Use Scenario: Output stage of 50–100 W audio or instrumentation amplifiers operating in Class AB mode. IC Role / Device Role / Timing Role: Final power gain element delivering high-fidelity current into low-impedance loads (e.g., 4–8 Ω speakers). Use Value: Low V_CE(sat) (≤2.0 V) preserves headroom; SOA curve supports sustained linear operation without thermal runaway.
Relay & Solenoid Driver	High-Voltage Power Supply Regulator
Use Scenario: Solid-state replacement for electromechanical relays controlling HVAC dampers, valve actuators, or industrial contactors. IC Role / Device Role / Timing Role: Low-frequency switch energizing inductive coils with fast turn-on/turn-off and snubber-free operation. Use Value: 100 mJ unclamped inductive energy rating eliminates need for external flyback diodes in many designs.	Use Scenario: Pass transistor in adjustable linear regulators powering sensitive analog circuitry from 60–90 V input sources. IC Role / Device Role / Timing Role: Series pass element dissipating excess voltage while maintaining precise output regulation. Use Value: 125 W power rating and 1.0 °C/W R_θJC allow stable operation with modest heatsinking at 1–2 A output.

DC Motor Control

Linear Power Amplifier

Use Scenario: Driving brushed DC motors in industrial actuators requiring 5–10 A peak current and 60–100 V supply rails.

IC Role / Device Role / Timing Role: High-current NPN switch controlling motor direction and speed via PWM or analog voltage.

Use Value: 100 V V_CEO(sus) withstands back-EMF spikes; 1000 h_FE minimizes microcontroller GPIO loading.

Use Scenario: Output stage of 50–100 W audio or instrumentation amplifiers operating in Class AB mode.

IC Role / Device Role / Timing Role: Final power gain element delivering high-fidelity current into low-impedance loads (e.g., 4–8 Ω speakers).

Use Value: Low V_CE(sat) (≤2.0 V) preserves headroom; SOA curve supports sustained linear operation without thermal runaway.

Relay & Solenoid Driver

High-Voltage Power Supply Regulator

Use Scenario: Solid-state replacement for electromechanical relays controlling HVAC dampers, valve actuators, or industrial contactors.

IC Role / Device Role / Timing Role: Low-frequency switch energizing inductive coils with fast turn-on/turn-off and snubber-free operation.

Use Value: 100 mJ unclamped inductive energy rating eliminates need for external flyback diodes in many designs.

Use Scenario: Pass transistor in adjustable linear regulators powering sensitive analog circuitry from 60–90 V input sources.

IC Role / Device Role / Timing Role: Series pass element dissipating excess voltage while maintaining precise output regulation.

Use Value: 125 W power rating and 1.0 °C/W R_θJC allow stable operation with modest heatsinking at 1–2 A output.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TIP141	80 V V_CEO(sus), same package and pinout, identical h_FE and I_C ratings	Limited to ≤72 V systems; lower voltage margin increases risk of avalanche failure during transients	Select when cost sensitivity outweighs need for 100 V margin and system voltage remains ≤60 V.
MJ11016	100 V V_CEO, 30 A I_C, higher power (200 W), TO-3 package, no integrated base resistor	Requires external base resistor network; suited for higher-current, higher-reliability industrial power supplies	Choose for >15 A applications or where TO-3 mechanical robustness and higher SOA are mandatory.

Compared with TIP142, TIP141 offers identical functionality at lower voltage rating - suitable only where transient margins permit - while MJ11016 provides greater current and power headroom but demands additional bias components and larger board space.

Availability

TIP142 is available at Aetrix Electronics and suitable for DC motor control, linear power amplification, relay/solenoid driving, and high-voltage linear regulator applications requiring stable component supply across extended production lifecycles.

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

ON Semiconductor (now onsemi) is a global semiconductor manufacturer specializing in power management, analog, sensor, and logic devices for automotive, industrial, and cloud power markets.

The TIP142 belongs to the TIP14x Darlington transistor family, engineered for rugged, cost-effective high-current switching and amplification in non-safety-critical industrial and consumer equipment.

FAQ

What is the maximum collector-emitter sustaining voltage for the TIP142?

The TIP142 has a minimum collector-emitter sustaining voltage (V_CEO(sus)) of 100 Vdc at I_C = 30 mA and I_B = 0. This rating is confirmed in the "Maximum Ratings" table and "Electrical Characteristics" section of the official ON Semiconductor datasheet (TIP140/D, Rev. 5). It reflects the device's ability to block voltage in the off state without breakdown under specified test conditions - a critical parameter for selecting the TIP142 in 80 V bus or high-transient industrial applications.

Does the TIP142 include an internal base-emitter resistor?

Yes, the TIP142 features monolithic construction with a built-in base-emitter shunt resistor (~8.0 kΩ), as explicitly stated in the "Features" section of the ON Semiconductor datasheet. This resistor ensures reliable turn-off by providing a discharge path for stored base charge, eliminating the need for an external pull-down resistor in most switching applications - a key design simplification distinguishing the TIP142 from discrete transistor pairs.

What is the thermal resistance from junction to case for the TIP142?

The thermal resistance from junction to case (R_θJC) for the TIP142 is 1.0 °C/W, per the "Thermal Characteristics" table in the official datasheet. This value applies to the SOT-93 (TO-218) package with proper mechanical mounting and thermal interface material. It enables accurate junction temperature calculation (T_J = T_C + P_D × R_θJC) when designing heatsinks for continuous 125 W operation.

Can the TIP142 be used in linear amplifier applications?

Yes, the TIP142 is explicitly designed for both general-purpose amplifier and low-frequency switching applications, as stated in the device overview. Its safe operating area (SOA) curve (Figure 6), low saturation voltage, and stable h_FE across collector current support linear operation - particularly in Class AB audio output stages and precision high-voltage regulators where controlled conduction and thermal stability are essential.

What is the unclamped inductive load energy rating for the TIP142?

The TIP142 is rated for 100 mJ of unclamped inductive load energy, as verified in Figure 7 ("Unclamped Inductive Load") of the ON Semiconductor datasheet. This specification defines the maximum energy the device can safely absorb during turn-off into an inductive load without external clamping - directly supporting relay, solenoid, and transformer primary switching without mandatory snubber networks.

TIP142 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-247-3

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:: -65°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

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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