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

STMicroelectronics TIP105

Name: TIP105
Brand: STMicroelectronics
SKU: TIP105
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP105

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: TIP105.pdf

Description:: TRANS PNP DARL 60V 8A TO-220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TIP105 from STMicroelectronics is a PNP silicon power Darlington transistor in TO-220 package, rated for -60 V V_CEO, -8 A I_C, and 80 W P_tot at T_case ≤ 25 °C, featuring integrated antiparallel collector-emitter diode and h_FE groups (R/O/Y) up to 18,000, used in DC-AC converters and low-voltage DC motor drivers.

For engineers reviewing the TIP105 datasheet, TIP105 pinout, TIP105 application, or TIP105 equivalent, key selection criteria include guaranteed h_FE classification, built-in commutation diode forward voltage (V_F = -2.8 V), safe operating area limits, thermal resistance (R_thj-case = 1.56 °C/W), and complementary pairing with TIP102.

Technical Context

The TIP105 implements a monolithic Darlington configuration with epitaxial-base PNP structure, enabling high DC current gain while maintaining robust switching and linear operation. Its internal schematic includes two cascaded PNP transistors plus an integrated antiparallel diode across C–E terminals.

It operates with V_CE(sat) of -2.0 V at I_C = -3 A / I_B = -6 mA and -2.5 V at I_C = -8 A / I_B = -80 mA, and supports sustained V_CEO(sus) = -60 V at I_C = -30 mA with junction temperature up to 150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-60 V - Maximum allowable collector-emitter voltage with base open, defining safe blocking capability in switching applications.
I_C	-8 A - Continuous DC collector current rating, determining maximum load drive capacity in power stages.
P_tot	80 W - Total power dissipation at case temperature ≤ 25 °C, setting thermal design baseline for heatsink sizing.
h_FE (Group Y)	5000–18000 - Guaranteed minimum-to-typical DC current gain range, enabling low-base-drive designs for high-current loads.
V_F (diode)	-2.8 V - Forward voltage of integrated antiparallel C–E diode at -10 A, supporting bidirectional current handling in inductive switching.
R_thj-case	1.56 °C/W - Junction-to-case thermal resistance, directly usable to calculate junction temperature rise under known power and heatsink conditions.

Pinout & Package

Supplied in TO-220 plastic package with standard 3-pin layout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector (viewed from front with tab facing down, leads downward).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Emitter)	Main emitter terminal of Darlington pair	Low-impedance current return path; connected to system ground or negative rail in high-side switch configurations.
Pin 2 (Base)	Control input for Darlington pair	Accepts low-current drive (≤ -1 A) to switch up to -8 A collector current; requires current-limiting resistor in series.
Pin 3 (Collector)	Main collector terminal of Darlington pair	High-current output node; electrically tied to integrated antiparallel diode cathode for freewheeling in inductive loads.

Key Features

Feature	Design Value
Integrated antiparallel C–E diode	Eliminates need for external flyback diode in relay/motor drive circuits, reducing BOM count and PCB footprint.
h_FE group classification (R/O/Y)	Enables predictable gain selection for consistent biasing across production lots without recalibration.
Monolithic Darlington construction	Ensures matched transistor characteristics and stable thermal coupling between driver and output stages.
TO-220 package with metal tab	Provides direct mechanical and thermal interface to heatsinks, supporting 80 W dissipation with proper mounting.

Applications

DC Motor Control

Audio Power Amplifier

Use Scenario: Driving 12–24 V brushed DC motors in industrial actuators and HVAC dampers.

IC Role / Device Role / Timing Role: High-current PNP Darlington switch controlling motor direction and speed via PWM base drive.

Use Value: Integrated antiparallel diode handles back-EMF during PWM off-time, eliminating discrete snubber components.

Use Scenario: Output stage in Class AB audio amplifiers delivering ≥10 W into 4 Ω loads.

IC Role / Device Role / Timing Role: Complementary PNP output device paired with TIP102 in quasi-complementary push-pull topology.

Use Value: High h_FE reduces required driver stage current, simplifying preamp design and improving efficiency.

DC-AC Inverter

Industrial Linear Regulator

Use Scenario: Low-frequency (50/60 Hz) H-bridge switching in offline UPS and solar charge controllers.

IC Role / Device Role / Timing Role: High-voltage, high-current switching element in half-bridge leg with gate/base drive isolation.

Use Value: -60 V V_CEO rating accommodates bus voltage spikes up to ±50 V in transformer-coupled topologies.

Use Scenario: Pass transistor in high-current linear regulators for test equipment and lab power supplies.

IC Role / Device Role / Timing Role: Series pass element dissipating up to 60 W while maintaining tight output voltage regulation.

Use Value: R_thj-case = 1.56 °C/W enables stable operation with modest heatsinking at full 8 A load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD105G	Different package (DPAK), lower P_tot (50 W), no integrated diode, h_FE min 1000	Suitable for surface-mount designs with lower power density; requires external flyback diode	Select when board space constraints favor SMT and thermal budget allows reduced dissipation.
BDW53C	TO-220 package, no integrated diode, V_CEO = -100 V, h_FE = 25–250, higher V_CE(sat) (-3.0 V @ -6 A)	Better voltage margin for 48 V systems; less efficient switching due to higher saturation loss	Choose where higher blocking voltage is critical and diode can be added externally.

Compared with MJD105G and BDW53C, the TIP105 uniquely combines TO-220 through-hole compatibility, integrated commutation diode, and factory-gain binning-making it optimal for cost-sensitive, medium-power linear and switching designs requiring reliability and design simplicity.

Availability

TIP105 is available at Aetrix Electronics and suitable for DC motor control, audio power amplification, and industrial linear regulation requiring stable component supply and long-term manufacturing continuity.

Supply support for TIP105 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, digital, and mixed-signal ICs, discrete devices, and MEMS sensors for industrial, automotive, and consumer markets.

The TIP105 belongs to ST's legacy power bipolar transistor family, engineered specifically for robust, high-gain, medium-power linear and switching applications in industrial controls and power conversion equipment.

FAQ

What is the function of the integrated antiparallel diode in the TIP105?

The integrated antiparallel diode connects cathode to collector and anode to emitter, providing a built-in freewheeling path for inductive load current during turn-off. It conducts at -2.8 V forward voltage at -10 A, eliminating the need for an external flyback diode in motor or relay driver circuits.

How does h_FE grouping affect circuit design?

h_FE groups (R/O/Y) guarantee minimum DC current gain ranges-e.g., Group Y ensures h_FE ≥ 5000 at I_C = -3 A. This allows designers to size base drive resistors with confidence, avoiding overdesign or insufficient turn-on in production units across gain variance.

Can the TIP105 be used in parallel configurations?

Parallel operation is not recommended without individual emitter resistors due to thermal runaway risk. The monolithic Darlington structure exhibits positive thermal feedback; mismatched junction temperatures cause current hogging. If required, use 0.1–0.22 Ω emitter ballast resistors per device.

What is the maximum safe continuous collector current at 70 °C case temperature?

At T_case = 70 °C, derating applies: P_tot drops linearly from 80 W at 25 °C to 0 W at 150 °C. At 70 °C, P_tot ≈ 53 W. With V_CE(sat) ≈ -2.5 V at -8 A, max continuous I_C is ~21 A-but absolute max I_C remains -8 A per Absolute Maximum Ratings, limiting practical use to ≤ -8 A regardless of thermal headroom.

TIP105 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: PNP - Darlington

Current - Collector (Ic) (Max):: 8 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 2.5V @ 80mA, 8A

Current - Collector Cutoff (Max):: 50µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 2000 @ 3A, 4V

Power - Max:: 2 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

TIP105 FAQ

1.How can I place an order for TIP105 through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP105 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 TIP105 reliable?

The price and inventory of TIP105 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP105 is usually 5 days.

3.What payment methods are accepted for TIP105?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP105 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP105?

TIP105 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP105 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 TIP105?

For technical support, including TIP105 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP105 requirements.

6.How does Aetrix verify that TIP105 is sourced from the original manufacturer or authorized distributors?

All TIP105 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 TIP105 meets industry standards.

7.What is the process for return or replacement of TIP105?

All TIP105 units undergo pre-shipment inspection (PSI). If there is an issue with TIP105, 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 TIP105 part is unused and in its original packaging.

Return procedure for TIP105:

1.Submit a request within 90 days.

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

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