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

STMicroelectronics TIP102

Name: TIP102
Brand: STMicroelectronics
SKU: TIP102
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP102

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: TIP102.pdf

Description:: TRANS NPN DARL 100V 8A TO-220

Quantity:: RFQ Add To RFQ list

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Inventory:4,807

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Product details

Overview

TIP102 from STMicroelectronics is an NPN silicon power Darlington transistor in TO-220 package, designed for high-current linear and switching applications. It features 100 V V_CEO, 8 A continuous collector current, integrated antiparallel collector-emitter diode, 1000–20000 h_FE, and 2.8 V V_BE at 8 A - used in audio power amplifiers and DC motor drivers.

For engineers reviewing the TIP102 datasheet, TIP102 pinout, TIP102 application, or TIP102 equivalent, key selection criteria include safe operating area (SOA) compliance at 100 V/8 A, thermal resistance (R_thj-case = 1.56 °C/W), integrated commutation diode forward voltage (2.8 V), and Darlington base drive requirements (IB ≤ 80 mA for IC = 8 A).

Technical Context

The TIP102 implements a monolithic epitaxial-base Darlington pair with built-in base-emitter resistors (R1 ≈ 5 kΩ, R2 ≈ 150 Ω) to stabilize bias and improve turn-off speed. Its integrated antiparallel diode enables bidirectional current handling without external flyback components in inductive switching.

It operates in both linear mode (e.g., Class AB audio output stage) and saturated switching mode (e.g., DC motor on/off control), with V_CE(sat) = 2.0 V at IC = 3 A/IB = 6 mA and 2.5 V at IC = 8 A/IB = 80 mA - confirming low conduction loss under heavy load.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - supports operation in 48 V industrial bus systems with margin against transients
I_C (continuous)	8 A - drives loads such as 12 V/24 V DC motors up to ~100 W without forced cooling
h_FE	1000–20000 - enables low-base-drive-current control (e.g., 6–80 mA) for microcontroller interfacing
V_CE(sat)	2.0–2.5 V - limits conduction loss to ≤20 W at 8 A, reducing heatsink requirements
R_thj-case	1.56 °C/W - allows ≥50 W power dissipation with standard TO-220 heatsink at T_case ≤ 25 °C
V_F (diode)	2.8 V - clamps inductive kickback with predictable forward drop, eliminating need for external Schottky
P_tot	80 W - defines maximum steady-state power envelope before thermal shutdown in TO-220 package

Pinout & Package

Package: TO-220 (3-lead, vertical mounting, insulated tab). Pin 1 = Base, Pin 2 = Collector (tab-connected), Pin 3 = Emitter.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Base)	Control input node	Receives low-current drive (6–80 mA); internal R1/R2 network ensures stable bias and prevents latch-up
Pin 2 (Collector)	High-current output node	Electrically connected to metal tab; requires isolation washer when mounted to heatsink
Pin 3 (Emitter)	Power return path	Serves as common reference for load; internal diode anode connects here for flyback conduction

Key Features

Feature	Design Value
Monolithic Darlington structure	Integrates driver and output transistors on single die, ensuring matched thermal behavior and gain stability
Built-in base-emitter resistors	R1 ≈ 5 kΩ and R2 ≈ 150 Ω provide self-biasing and reduce external component count in switch-mode designs
Integrated antiparallel diode	Eliminates need for discrete flyback diode in relay/motor drive circuits, saving PCB space and BOM cost
High SOA rating	Supports 100 V × 8 A operation in linear region - suitable for Class AB audio output stages without secondary protection

Applications

Audio Power Amplifier

DC Motor Driver

Use Scenario: Output stage in 20–50 W Class AB audio amplifier for public address or instrumentation.

IC Role / Device Role / Timing Role: NPN Darlington output transistor delivering high current swing into 4–8 Ω speaker load.

Use Value: High h_FE reduces driver-stage complexity; integrated diode handles reactive speaker back-EMF without external clamp.

Use Scenario: H-bridge half-bridge leg or unidirectional switch controlling 12–24 V brushed DC motors (e.g., HVAC actuators).

IC Role / Device Role / Timing Role: Main power switch turning motor current on/off under MCU PWM control.

Use Value: 8 A I_C and 2.5 V V_CE(sat) enable efficient 100 W motor drive; built-in diode recirculates inductive current during PWM off-time.

Linear Power Regulator

DC-AC Inverter Stage

Use Scenario: Pass element in adjustable 0–30 V/5 A bench power supply with analog feedback loop.

IC Role / Device Role / Timing Role: Series pass transistor regulating output voltage via base-controlled conduction.

Use Value: 100 V V_CEO accommodates 40 V input rails; SOA supports safe operation across full V_IN–V_OUT differential range.

Use Scenario: Switching element in push-pull or half-bridge topology of low-frequency (50–400 Hz) DC-AC inverters for backup power.

IC Role / Device Role / Timing Role: High-current switch converting DC bus to AC square wave output.

Use Value: Integrated diode provides natural commutation path during dead-time; 15 A I_CM handles surge currents during transformer magnetization.

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
MJD1000G	Higher V_CEO (120 V), lower h_FE (750 min), TO-263 package	Requires surface-mount layout; better suited for higher-voltage SMPS primary-side switching	Choose for SMT assembly or >100 V bus applications; verify PCB thermal relief for 80 W dissipation
TIP122	Same TO-220 package, identical pinout, but lower V_CEO (100 V same), lower I_C (5 A), no integrated diode	Lacks built-in commutation diode - requires external flyback diode in inductive loads	Select only if diode omission is acceptable and load current ≤5 A; not drop-in for TIP102's diode-dependent designs

Compared with MJD1000G and TIP122, the TIP102 uniquely combines TO-220 through-hole compatibility, 8 A current rating, and integrated antiparallel diode - making it optimal for legacy motor/audio designs where board space, thermal management, and BOM simplification are critical.

Availability

TIP102 is available at Aetrix Electronics and suitable for audio power amplifiers, DC motor drivers, and linear power regulators requiring stable component supply across industrial and embedded production cycles.

Supply support for TIP102 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 TIP102 belongs to ST's legacy power bipolar transistor family, engineered specifically for robust, cost-effective linear and switching power control in industrial equipment and audio systems.

FAQ

Is the TIP102 pin-compatible with the TIP122?

Yes - both use TO-220 package with identical pinout (Base–Collector–Emitter). However, TIP102 includes an integrated antiparallel diode and supports 8 A continuous current versus TIP122's 5 A rating and no internal diode. Direct substitution requires verifying diode necessity and thermal margin.

What is the purpose of the internal resistors R1 and R2?

R1 (≈5 kΩ) and R2 (≈150 Ω) form a base bias network that stabilizes the Darlington pair against thermal runaway and improves turn-off speed by providing a discharge path for stored base charge. They eliminate the need for external base resistors in many switching applications.

Can the TIP102 be used in parallel configurations?

Parallel operation is not recommended due to mismatched h_FE and thermal coefficients between units, which cause current imbalance. For higher current, use a single higher-rated device (e.g., TIP142) or implement active current-sharing circuitry with emitter resistors and matched heatsinking.

Does the integrated diode support reverse current during PWM operation?

Yes - the antiparallel diode conducts reverse current (collector-to-emitter) during inductive load freewheeling, enabling safe energy recirculation in motor and relay drivers. Its 2.8 V forward voltage and 10 A rating match typical flyback conditions without external components.

TIP102 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Transistor Type:: NPN - Darlington

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

Voltage - Collector Emitter Breakdown (Max):: 100 V

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

Current - Collector Cutoff (Max):: 50µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 1000 @ 3A, 4V

Power - Max:: 2 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

TIP102 FAQ

1.How can I place an order for TIP102 through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP102 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 TIP102 reliable?

The price and inventory of TIP102 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP102 is usually 5 days.

3.What payment methods are accepted for TIP102?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP102 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP102?

TIP102 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP102 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 TIP102?

For technical support, including TIP102 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP102 requirements.

6.How does Aetrix verify that TIP102 is sourced from the original manufacturer or authorized distributors?

All TIP102 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 TIP102 meets industry standards.

7.What is the process for return or replacement of TIP102?

All TIP102 units undergo pre-shipment inspection (PSI). If there is an issue with TIP102, 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 TIP102 part is unused and in its original packaging.

Return procedure for TIP102:

1.Submit a request within 90 days.

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

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