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

STMicroelectronics TIP35CW

Name: TIP35CW
Brand: STMicroelectronics
SKU: TIP35CW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP35CW

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-247-3

Datasheet:: TIP35CW.pdf

Description:: TRANS NPN 100V 25A TO-247-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TIP35CW from STMicroelectronics is a complementary NPN silicon power transistor in TO-247 package, rated for 100 V V_CEO, 25 A continuous collector current, and 125 W total dissipation at T_case = 25 °C; designed for high-current linear and switching applications including audio output stages and DC motor control.

For engineers reviewing the TIP35CW datasheet, TIP35CW pinout, TIP35CW application, or TIP35CW equivalent, key selection criteria include its low 1.8 V V_CE(sat) at I_C = 15 A / I_B = 1.5 A, h_FE ≥ 25 at I_C = 1.5 A, R_thj-case = 1 °C/W thermal resistance, and ECOPACK® lead-free compliance.

Technical Context

The TIP35CW employs planar "base island" layout to achieve high DC current gain and low saturation voltage simultaneously. It operates as a medium-power NPN bipolar junction transistor with fully specified safe operating area (SOA) up to 100 V and 25 A under DC conditions.

Its electrical behavior is characterized by tight parameter distributions across temperature: V_CE(sat) remains ≤ 4 V even at I_C = 25 A / I_B = 5 A, and h_FE maintains ≥ 10 at I_C = 15 A, supporting stable biasing in Class AB amplifier designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines safe DC voltage swing capability.
I_C	25 A - Continuous collector current rating; supports high-power analog and switching loads without forced cooling.
V_CE(sat)	1.8 V @ I_C=15 A, I_B=1.5 A - Low saturation voltage minimizes conduction loss and heat generation in linear and saturated-switching modes.
h_FE	25–50 @ I_C=1.5 A - High DC current gain enables efficient base drive with minimal control current.
R_thj-case	1 °C/W - Junction-to-case thermal resistance allows direct heatsink mounting for reliable 125 W power handling at 25 °C case temperature.
P_tot	125 W @ T_case = 25 °C - Total power dissipation limit sets maximum usable output power in thermally managed designs.

Pinout & Package

Package: TO-247 - Three-terminal through-hole power package with isolated metal tab (collector), suitable for bolt-down heatsinking and industrial PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input	Receives base current to turn on transistor; requires external current-limiting resistor in most driver circuits.
2 (Collector)	High-current output node	Connected to heatsink via metal tab; electrically tied to collector; must be insulated if heatsink is grounded.
3 (Emitter)	Current return path	Serves as common reference for load current; often connected to ground or negative rail in single-ended configurations.

Key Features

Feature	Design Value
Low V_CE(sat)	1.8 V at 15 A ensures <27 W conduction loss per device in Class AB audio output stage.
High h_FE	Min. 25 at 1.5 A reduces required base drive current, easing driver circuit design.
ECOPACK® compliance	Lead-free second-level interconnect meets RoHS and JEDEC JESD97 environmental standards.
Robust SOA	Rated for 100 V × 25 A DC operation with defined derating above 25 °C case temperature.

Applications

Audio Power Amplifier

DC Motor Driver

Use Scenario: Output stage of 50–100 W stereo amplifier driving 4–8 Ω speakers.

IC Role / Device Role / Timing Role: NPN power switch delivering high-fidelity analog current to speaker load.

Use Value: Low V_CE(sat) and high h_FE reduce crossover distortion and improve thermal stability in push-pull configuration.

Use Scenario: H-bridge half-bridge leg controlling bidirectional 24 V / 20 A DC motor.

IC Role / Device Role / Timing Role: High-current NPN switch enabling PWM-based speed and direction control.

Use Value: 125 W dissipation and 1 °C/W R_thj-case support sustained 20 A operation with passive heatsinking.

Linear Voltage Regulator

Industrial Power Supply

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

IC Role / Device Role / Timing Role: Series pass element regulating output voltage under variable load.

Use Value: Stable h_FE across temperature ensures predictable current gain for feedback loop compensation.

Use Scenario: Primary-side switching transistor in 120 W offline SMPS auxiliary supply.

IC Role / Device Role / Timing Role: Medium-speed switching transistor in flyback or forward converter topology.

Use Value: f_T = 3 MHz supports clean switching up to ~100 kHz with minimal gate drive complexity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJE13009	Lower V_CEO (400 V), higher V_CE(sat) (3 V @ 8 A), TO-220 package	Better suited for high-voltage flyback converters; less optimal for low-loss audio output	Select when higher breakdown voltage is critical and thermal budget allows larger heatsink.
2N3055	Older process; V_CEO = 60 V, h_FE = 20–70 (wide spread), TO-3 package	Legacy replacement only; lacks ECOPACK® compliance and consistent gain spec	Choose only for backward-compatible repairs where footprint and thermal interface match existing TO-3 mount.

Compared with MJE13009 and 2N3055, the TIP35CW offers superior thermal performance (125 W vs. ~75 W), tighter h_FE distribution, and lower V_CE(sat)-making it preferred for modern high-efficiency linear and switching power stages requiring repeatable thermal management.

Availability

TIP35CW is available at Aetrix Electronics and suitable for audio amplifier output stages, DC motor drivers, linear voltage regulators, and industrial power supplies requiring stable component supply and long-term manufacturability.

Supply support for TIP35CW 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, Switzerland, designing and manufacturing microcontrollers, power transistors, sensors, and analog ICs for industrial, automotive, and consumer markets.

The TIP35CW belongs to ST's legacy power bipolar transistor family, engineered specifically for cost-sensitive, high-reliability linear and switching power applications demanding robust SOA and thermal performance.

FAQ

What is the maximum safe continuous collector current for TIP35CW?

The TIP35CW is rated for 25 A continuous collector current at T_case = 25 °C. Derating is required above this temperature: current must be reduced linearly to zero at 150 °C junction temperature, following the 1 °C/W thermal resistance specification and SOA curves in the official datasheet.

Is TIP35CW pin-compatible with TIP35C or TIP35B?

No. TIP35CW uses the TO-247 package with collector-connected metal tab, while TIP35C and TIP35B use TO-220 and TO-3 packages respectively. Pin assignments differ across packages, and mechanical mounting, thermal interface, and current-handling capabilities are not interchangeable without board and heatsink redesign.

Does TIP35CW require a heatsink in all applications?

Yes-due to its 125 W power dissipation rating, the TIP35CW must be mounted on an appropriately sized heatsink in any application drawing >2–3 W continuously. Without heatsinking, junction temperature exceeds 150 °C within seconds at full current, triggering thermal runaway and permanent failure.

Can TIP35CW be used in switching mode at 100 kHz?

Yes, but with limitations. Its f_T = 3 MHz supports switching up to ~100 kHz in hard-switched topologies, provided base drive is optimized (low-impedance source, adequate I_B > 5 A peak). However, switching losses increase significantly above 50 kHz due to minority-carrier storage time; synchronous rectification or MOSFET alternatives are preferred for high-frequency SMPS.

TIP35CW Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-247-3

Packaging:: Tube

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 25 A

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

Vce Saturation (Max) @ Ib, Ic:: 4V @ 5A, 25A

Current - Collector Cutoff (Max):: 1mA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 10 @ 15A, 4V

Power - Max:: 125 W

Frequency - Transition:: 3MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

TIP35CW FAQ

1.How can I place an order for TIP35CW through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP35CW 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 TIP35CW reliable?

The price and inventory of TIP35CW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP35CW is usually 5 days.

3.What payment methods are accepted for TIP35CW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP35CW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP35CW?

TIP35CW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP35CW 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 TIP35CW?

For technical support, including TIP35CW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP35CW requirements.

6.How does Aetrix verify that TIP35CW is sourced from the original manufacturer or authorized distributors?

All TIP35CW 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 TIP35CW meets industry standards.

7.What is the process for return or replacement of TIP35CW?

All TIP35CW units undergo pre-shipment inspection (PSI). If there is an issue with TIP35CW, 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 TIP35CW part is unused and in its original packaging.

Return procedure for TIP35CW:

1.Submit a request within 90 days.

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

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