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

onsemi TIP102TSTU

Name: TIP102TSTU
Brand: onsemi
SKU: TIP102TSTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP102TSTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: TIP102TSTU.pdf

Description:: TRANS NPN DARL 100V 8A TO-220-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TIP102TSTU from ON Semiconductor (formerly Fairchild) is an NPN epitaxial silicon Darlington transistor in TO-220 package, rated for 100 V V_CEO, 8 A DC collector current, and 80 W case-power dissipation at T_C = 25°C. It integrates monolithic base-emitter shunt resistors (R1 = 10 kΩ, R2 = 0.6 kΩ), delivers h_FE ≥ 1000 at I_C = 3 A, and is used in industrial motor control, relay drivers, and high-current linear amplifiers.

For engineers reviewing the TIP102TSTU datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO(sus) = 100 V, I_C = 8 A, V_CE(sat) = 2.5 V at I_C = 8 A / I_B = 80 mA, integrated bias resistors, and TO-220 thermal performance under continuous conduction.

Technical Context

The TIP102TSTU implements a monolithic Darlington pair with built-in base-emitter shunt resistors (10 kΩ and 0.6 kΩ), enabling simplified biasing without external components. Its structure supports high DC current gain while maintaining low saturation voltage under heavy load conditions.

It operates as a single-ended, high-current switching or linear amplification device with V_CEO(sus) = 100 V, I_C = 8 A, and safe operating area (SOA) defined up to 5 ms pulse width. Thermal design relies on case-to-heatsink conduction via the metal tab in TO-220 package.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Sustains 100 V collector-emitter voltage before breakdown; enables use in 72 VDC industrial bus systems.
I_C (DC)	8 A - Continuous collector current rating; supports solenoid/relay coils drawing up to 8 A steady-state.
h_FE	≥1000 @ I_C=3 A - High DC gain reduces required base drive current, easing microcontroller GPIO interface.
V_CE(sat)	2.5 V @ I_C=8 A, I_B=80 mA - Low saturation voltage minimizes power loss (20 W max at full current) in switching applications.
P_C (T_C=25°C)	80 W - Case power dissipation limit; requires heatsink with ≤1.5°C/W thermal resistance for full-load operation.
R1/R2	10 kΩ / 0.6 kΩ - Integrated base-emitter shunt resistors provide self-biasing and turn-off assurance without external parts.

Pinout & Package

Package: TO-220 (3-lead, vertical mounting, metal tab electrically connected to collector). Tab must be isolated from chassis unless collector is at system ground potential.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input node	Receives base current to enable conduction; internal 10 kΩ resistor pulls base to emitter when un-driven.
2 (Collector)	High-current output node	Connected to metal tab; carries full load current and dissipates heat; must be electrically isolated if not at ground potential.
3 (Emitter)	Current return path	Serves as common reference for load; internal 0.6 kΩ resistor ensures fast turn-off by discharging base charge.

Key Features

Feature	Design Value
Monolithic Darlington pair	Single-die integration eliminates inter-device parameter mismatch and improves thermal coupling for stable gain.
Built-in base-emitter resistors	Eliminates need for external bias network; reduces BOM count and PCB space in relay/motor driver designs.
100 V V_CEO(sus)	Supports direct interface with 48–72 VDC industrial power rails without additional clamping circuitry.
80 W case power rating	Enables high-current linear operation (e.g., analog current sources) with appropriate heatsinking.

Applications

Industrial Relay Drivers	Motor Start Circuits
Use Scenario: Driving 24–48 VDC industrial relays with coil currents up to 7 A. IC Role / Device Role / Timing Role: High-gain switching transistor providing galvanic isolation between logic-level controller and inductive load. Use Value: Integrated R1/R2 ensures reliable turn-off and suppresses leakage-induced chatter; V_CEO = 100 V withstands relay coil flyback spikes.	Use Scenario: Controlling startup current for small AC induction motors (≤1/4 HP) in HVAC blowers. IC Role / Device Role / Timing Role: Linear current limiter during motor inrush phase, reducing peak line current. Use Value: 8 A DC rating and 80 W dissipation allow sustained 5–6 A inrush current for 1–2 seconds without thermal shutdown.
Linear Power Regulators	DC Load Switches
Use Scenario: Pass element in adjustable 0–30 V, 5 A bench power supply. IC Role / Device Role / Timing Role: Series pass transistor regulating output voltage via feedback-controlled base drive. Use Value: h_FE ≥ 1000 simplifies error amplifier design; low V_CE(sat) improves efficiency at mid-load currents.	Use Scenario: High-side load switch for 12–24 VDC battery-powered equipment. IC Role / Device Role / Timing Role: Discrete NPN Darlington configured as emitter-follower to drive loads requiring >5 A. Use Value: Built-in R2 provides guaranteed turn-off even with floating base drive; TO-220 tab enables direct heatsink mounting.

Industrial Relay Drivers

Motor Start Circuits

Use Scenario: Driving 24–48 VDC industrial relays with coil currents up to 7 A.

IC Role / Device Role / Timing Role: High-gain switching transistor providing galvanic isolation between logic-level controller and inductive load.

Use Value: Integrated R1/R2 ensures reliable turn-off and suppresses leakage-induced chatter; V_CEO = 100 V withstands relay coil flyback spikes.

Use Scenario: Controlling startup current for small AC induction motors (≤1/4 HP) in HVAC blowers.

IC Role / Device Role / Timing Role: Linear current limiter during motor inrush phase, reducing peak line current.

Use Value: 8 A DC rating and 80 W dissipation allow sustained 5–6 A inrush current for 1–2 seconds without thermal shutdown.

Linear Power Regulators

DC Load Switches

Use Scenario: Pass element in adjustable 0–30 V, 5 A bench power supply.

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

Use Value: h_FE ≥ 1000 simplifies error amplifier design; low V_CE(sat) improves efficiency at mid-load currents.

Use Scenario: High-side load switch for 12–24 VDC battery-powered equipment.

IC Role / Device Role / Timing Role: Discrete NPN Darlington configured as emitter-follower to drive loads requiring >5 A.

Use Value: Built-in R2 provides guaranteed turn-off even with floating base drive; TO-220 tab enables direct heatsink mounting.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BDW42G	V_CEO = 100 V, I_C = 12 A, no integrated resistors, TO-220 package	Requires external base bias network; higher I_C but lower h_FE (min. 750)	Select when higher current headroom is needed and board space allows discrete bias components.
TIP122	V_CEO = 100 V, I_C = 5 A, same R1/R2 values, TO-220 package	Lower I_C rating limits use in >5 A continuous loads; identical pinout and bias architecture	Select when load current stays below 5 A and footprint compatibility is critical.

Compared with BDW42G and TIP122, the TIP102TSTU offers the highest balance of integrated biasing, 8 A DC capability, and 100 V blocking-making it optimal for industrial relay and motor starter designs where simplicity and thermal margin are prioritized.

Availability

TIP102TSTU is available at Aetrix Electronics and suitable for industrial relay drivers, motor start circuits, and linear power regulators requiring stable component supply across multi-year production cycles.

Supply support for TIP102TSTU 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The TIP102TSTU belongs to ON Semiconductor's legacy power bipolar transistor family, designed specifically for robust, cost-effective high-current switching and linear regulation in industrial control systems.

FAQ

What is the maximum continuous collector current rating for the TIP102TSTU?

The TIP102TSTU has a maximum DC collector current rating of 8 A at T_C = 25°C. This rating assumes proper heatsinking to maintain case temperature within limits; derating applies above 25°C per the published power derating curve. Operation at full 8 A requires a thermal resistance of ≤1.5°C/W from case to ambient.

Does the TIP102TSTU have built-in base resistors, and what are their values?

Yes, the TIP102TSTU integrates two monolithic base-emitter shunt resistors: R1 = 10 kΩ (base-to-emitter pull-down) and R2 = 0.6 kΩ (base-to-emitter discharge path). These eliminate the need for external bias components and ensure reliable turn-off in relay and inductive load applications.

What is the collector-emitter sustaining voltage (V_CEO(sus)) of the TIP102TSTU?

The TIP102TSTU has a collector-emitter sustaining voltage V_CEO(sus) of 100 V at I_C = 30 mA and I_B = 0. This rating reflects its ability to block 100 V under open-base conditions and supports use in 72 VDC industrial systems with margin for transient overvoltage.

Can the TIP102TSTU be used in linear regulator applications?

Yes, the TIP102TSTU is suitable for linear regulator applications due to its 80 W case power dissipation rating and low V_CE(sat) of 2.5 V at 8 A. When paired with adequate heatsinking and current-limiting circuitry, it functions effectively as a series pass element in adjustable 0–30 V, 5 A bench supplies.

Is the metal tab on the TIP102TSTU package electrically connected, and to which terminal?

Yes, the metal tab on the TIP102TSTU TO-220 package is electrically connected to the collector terminal (Pin 2). This requires electrical isolation from the heatsink unless the collector is referenced to system ground; insulating hardware or mica washers must be used otherwise.

TIP102TSTU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

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-220-3

TIP102TSTU FAQ

1.How can I place an order for TIP102TSTU through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP102TSTU 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 TIP102TSTU reliable?

The price and inventory of TIP102TSTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP102TSTU is usually 5 days.

3.What payment methods are accepted for TIP102TSTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP102TSTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP102TSTU?

TIP102TSTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP102TSTU 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 TIP102TSTU?

For technical support, including TIP102TSTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP102TSTU requirements.

6.How does Aetrix verify that TIP102TSTU is sourced from the original manufacturer or authorized distributors?

All TIP102TSTU 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 TIP102TSTU meets industry standards.

7.What is the process for return or replacement of TIP102TSTU?

All TIP102TSTU units undergo pre-shipment inspection (PSI). If there is an issue with TIP102TSTU, 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 TIP102TSTU part is unused and in its original packaging.

Return procedure for TIP102TSTU:

1.Submit a request within 90 days.

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

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