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

onsemi TIP141

Name: TIP141
Brand: onsemi
SKU: TIP141
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP141

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-218-3

Datasheet:: TIP141.pdf

Description:: TRANS NPN 80V 10A TO-218

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TIP141 from STMicroelectronics is an NPN silicon power Darlington transistor in monolithic configuration, designed for high-current linear and switching applications such as motor control and power supply regulation. It features 80 V collector-base voltage (VCBO), 10 A continuous collector current (IC), 125 W total power dissipation at Tcase ≤ 25 °C, integrated antiparallel collector-emitter diode, and TO-218 plastic package.

For engineers reviewing the TIP141 datasheet, TIP141 pinout, TIP141 application, or TIP141 equivalent, key selection criteria include sustained VCEO(sus) of 80 V at IC = 30 mA, VCE(sat) ≤ 3 V at IC = 10 A / IB = 40 mA, hFE ≥ 500 at IC = 10 A, thermal resistance Rthj-case ≤ 1 °C/W, and compatibility with complementary PNP TIP146 in H-bridge designs.

Technical Context

The TIP141 operates as a monolithic NPN Darlington pair with built-in base resistors (R1 ≈ 5 kΩ, R2 ≈ 150 Ω) enabling direct TTL/CMOS drive without external biasing. Its integrated antiparallel collector-emitter diode supports inductive load commutation in switching topologies.

Rated for 150 °C maximum junction temperature and −65 to 150 °C storage range, it delivers robust performance in industrial environments where thermal cycling and sustained 10 A conduction are required. The device is not intended for RF or high-frequency switching above 100 kHz due to measured ton/toff of 0.9 µs/4 µs under specified resistive load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
VCBO	80 V - Maximum reverse voltage the collector-base junction withstands with emitter open; defines safe operating area in inductive turn-off.
VCEO(sus)	80 V at IC = 30 mA - Sustaining voltage under pulsed conditions; critical for snubberless flyback and relay driver design.
IC / ICM	10 A continuous / 20 A peak - Supports motor start surge and solenoid actuation without derating below 25 °C case temperature.
VCE(sat)	≤ 3 V at IC = 10 A, IB = 40 mA - Limits conduction loss to ≤30 W per device, enabling compact heatsink sizing in 12–48 V systems.
hFE	≥ 500 at IC = 10 A, VCE = 4 V - Ensures sufficient current gain for low-base-drive applications like microcontroller-driven power stages.
Rthj-case	≤ 1 °C/W - Enables 125 W dissipation with ≤125 K rise from case to junction; requires mechanical mounting to ≥125 cm² aluminum heatsink.

Pinout & Package

Package: TO-218 (SOT-93), thermally optimized plastic power package with isolated metal tab (pin 2), standardized for industrial mounting and forced-air cooling.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input node	Accepts TTL/CMOS-compatible drive (IB ≤ 0.5 A); internal R1/R2 network eliminates need for external base resistor.
2 (Collector)	High-current output node	Electrically connected to metal tab; must be insulated from chassis unless system ground reference permits direct mounting.
3 (Emitter)	Power return path	Low-impedance emitter connection; used as common return for load current and base drive return in grounded-emitter configurations.

Key Features

Feature	Design Value
Monolithic Darlington structure	Single-die integration eliminates inter-device parameter mismatch and thermal drift between driver and output transistors.
Integrated antiparallel C-E diode	Enables self-commutated inductive load switching without external flyback diode, reducing BOM count and PCB footprint.
Built-in base resistors (R1 ≈ 5 kΩ, R2 ≈ 150 Ω)	Permits direct logic-level drive from MCU GPIO pins; eliminates discrete bias network and associated layout sensitivity.
150 °C max junction temperature rating	Supports operation in sealed enclosures or high-ambient environments (e.g., industrial control cabinets up to 85 °C ambient).

Applications

DC Motor Driver

Linear Regulator Pass Element

Use Scenario: Bidirectional 24 V DC brushed motor control in conveyor systems with PWM frequency ≤ 5 kHz.

IC Role / Device Role / Timing Role: High-side NPN switch in half-bridge configuration, paired with TIP146 PNP for complementary drive.

Use Value: Integrated C-E diode clamps inductive kickback during PWM off-time, eliminating external diode and reducing component count by one per channel.

Use Scenario: Adjustable 0–30 V, 5 A linear bench power supply with foldback current limiting.

IC Role / Device Role / Timing Role: Series pass element dissipating up to 125 W under worst-case dropout (e.g., 48 V input → 5 V output @ 10 A).

Use Value: Rthj-case ≤ 1 °C/W enables stable operation with passive heatsinking, avoiding fan noise and reliability concerns in lab-grade equipment.

Relay/Solenoid Driver

Industrial Heater Controller

Use Scenario: 12 V/24 V automotive-style relay coil driving with 100 ms on/off cycles in HVAC control panels.

IC Role / Device Role / Timing Role: Low-speed saturated switch delivering 10 A peak to energize high-inductance coils.

Use Value: VCEO(sus) = 80 V ensures reliable turn-off without snubber circuits, even with long wiring inductance (>10 µH).

Use Scenario: Phase-angle controlled 230 VAC resistive heating element (2 kW) using zero-crossing TRIAC driver interface.

IC Role / Device Role / Timing Role: DC-coupled amplifier stage driving opto-TRIAC gate with precise current regulation.

Use Value: hFE ≥ 500 at 10 A allows single-stage amplification from microcontroller DAC output, simplifying isolation interface design.

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
MJD127G	TO-263 surface-mount package; lower Ptot (50 W); VCEO = 100 V; no integrated C-E diode.	Requires external flyback diode and heatsink clip; suited for space-constrained PCBs but not drop-in replacement.	Select when board area is critical and thermal management uses copper pour rather than bolted heatsinks.
BDW53C	TO-220 package; Ptot = 90 W; VCEO = 100 V; hFE min = 750 at IC = 3 A (not rated at 10 A); no integrated diode.	Limited to ≤6 A continuous use; needs external base resistor and flyback diode; lower thermal capability than TIP141.	Choose only for cost-sensitive, lower-power (<5 A) linear regulators where TO-220 mounting suffices.

Compared with MJD127G and BDW53C, the TIP141 uniquely combines TO-218 mechanical robustness, 125 W dissipation, integrated C-E diode, and verified 10 A operation-making it the only option among the three qualified for industrial motor drivers requiring >8 A sustained conduction and self-protected inductive switching.

Availability

TIP141 is available at Aetrix Electronics and suitable for DC motor drivers, linear power supplies, relay/solenoid interfaces, and industrial heater controllers requiring stable component supply across multi-year production cycles.

Supply support for TIP141 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 TIP141 belongs to ST's legacy power bipolar transistor family, engineered specifically for ruggedized industrial linear and switching power stages where reliability under thermal stress and high-current surge is mandatory.

FAQ

Can TIP141 be used in parallel for higher current?

No-monolithic Darlington devices like TIP141 exhibit positive thermal feedback and unequal current sharing due to hFE and VBE mismatches. Parallel operation without individual emitter resistors risks thermal runaway. ST does not recommend or characterize parallel use; instead, select higher-rated alternatives such as TIP147 (PNP complement) or discrete Darlington modules.

Is the integrated collector-emitter diode rated for continuous conduction?

No-the integrated antiparallel diode is rated only for transient energy absorption during inductive turn-off (e.g., flyback clamping). Its forward voltage and surge current capability are not specified for steady-state conduction. For continuous reverse current paths, an external diode with appropriate IF(AV) and IFSM ratings must be added.

What is the maximum safe operating frequency for TIP141 in PWM applications?

Based on measured ton = 0.9 µs and toff = 4 µs under RL = 3 Ω, the practical upper limit for reliable saturation switching is ≤10 kHz. Above this, incomplete turn-on/turn-off increases conduction losses and junction temperature. For >20 kHz operation, MOSFET-based solutions are recommended.

Does TIP141 require a heatsink when operating at 5 A continuous?

Yes-even at 5 A and VCE(sat) ≈ 2 V, power dissipation reaches ~10 W. With Rthj-case = 1 °C/W and max Tj = 150 °C, a heatsink maintaining Tcase ≤ 75 °C is required. Without heatsinking, junction temperature exceeds safe limits within seconds, triggering thermal shutdown or permanent damage.

TIP141 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-218-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 80 V

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

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-218

TIP141 FAQ

1.How can I place an order for TIP141 through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP141 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 TIP141 reliable?

The price and inventory of TIP141 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP141 is usually 5 days.

3.What payment methods are accepted for TIP141?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP141 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP141?

TIP141 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP141 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 TIP141?

For technical support, including TIP141 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP141 requirements.

6.How does Aetrix verify that TIP141 is sourced from the original manufacturer or authorized distributors?

All TIP141 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 TIP141 meets industry standards.

7.What is the process for return or replacement of TIP141?

All TIP141 units undergo pre-shipment inspection (PSI). If there is an issue with TIP141, 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 TIP141 part is unused and in its original packaging.

Return procedure for TIP141:

1.Submit a request within 90 days.

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

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