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

STMicroelectronics TIP35C

Name: TIP35C
Brand: STMicroelectronics
SKU: TIP35C
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP35C

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-247-3

Datasheet:: TIP35C.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TIP35C from STMicroelectronics is a complementary NPN silicon power transistor designed for high-current linear and switching applications, featuring 100 V V_CEO, 25 A I_C, 125 W P_tot, and low 1.8 V V_CE(sat) at 15 A/1.5 A drive-commonly used in audio amplifier output stages and DC motor control circuits.

For engineers reviewing the TIP35C datasheet, TIP35C pinout, TIP35C application, or TIP35C equivalent, key selection criteria include saturation voltage under high collector current, thermal resistance (1 °C/W), junction temperature limit (150 °C), and TO-247 mechanical compatibility with heatsink mounting requirements.

Technical Context

The TIP35C employs planar "base island" technology to achieve high DC current gain (h_FE = 25–50 at 1.5 A, 10–25 at 15 A) while maintaining low V_CE(sat) across wide operating ranges. Its rugged construction supports pulsed collector currents up to 50 A (t_P < 5 ms).

Designed as part of a complementary pair with TIP36C, it enables push-pull and Class AB amplifier topologies. The device operates with V_EB ≤ 5 V and requires base drive sufficient to sustain full conduction without thermal runaway at case temperatures up to 25 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - maximum safe collector-emitter voltage with base open, defining breakdown margin in amplifier or switch applications
I_C	25 A - continuous collector current rating at T_case = 25 °C, sets usable DC load capacity before derating
V_CE(sat)	1.8 V @ I_C = 15 A, I_B = 1.5 A - low saturation voltage minimizes conduction loss and heatsink size
h_FE	25–50 @ I_C = 1.5 A - usable DC current gain range determines required base drive circuit sizing
R_thj-case	1 °C/W - junction-to-case thermal resistance defines minimum heatsink requirement for 125 W dissipation
f_T	3 MHz @ I_C = 1 A - transition frequency limits usable bandwidth in RF or fast-switching designs

Pinout & Package

Supplied in TO-247 package: three-terminal through-hole outline with isolated metal tab (collector), standardized for mechanical mounting and thermal interface to heatsinks.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input	Receives forward-biased current to turn on transistor; requires ≥1.5 A drive for full 15 A conduction
2 (Collector)	High-current output node	Connected to heatsink via metal tab; electrically tied to case and must be insulated if not at ground potential
3 (Emitter)	Current return path	Serves as common reference for base drive and load return; low-impedance connection critical for stability

Key Features

Feature	Design Value
Low V_CE(sat)	1.8 V at 15 A enables <10 W conduction loss in 25 A-class amplifiers, reducing thermal design burden
High I_CM	50 A peak current supports short-duration motor stall or audio transient conditions without failure
Planar "base island" layout	Improves current gain uniformity and thermal stability across die area versus older epitaxial structures
ECOPACK® compliance	Lead-free second-level interconnect meets RoHS and JEDEC JESD97 marking requirements for industrial use

Applications

Audio Power Amplifier

DC Motor Driver

Use Scenario: Output stage in 50–100 W Class AB audio amplifiers driving 4–8 Ω speakers.

IC Role / Device Role / Timing Role: NPN power switch delivering symmetrical positive half-cycle current to load.

Use Value: Low V_CE(sat) reduces crossover distortion and heat generation during high-fidelity playback.

Use Scenario: H-bridge or single-ended driver for 24–48 V brushed DC motors in industrial actuators.

IC Role / Device Role / Timing Role: High-current switching element controlling motor direction and speed via PWM.

Use Value: 25 A continuous rating supports >1 kW intermittent mechanical output with minimal derating.

Linear Voltage Regulator

Power Supply Pass Transistor

Use Scenario: Series pass element in adjustable 0–30 V, 5 A bench power supplies.

IC Role / Device Role / Timing Role: Linear regulator pass transistor dissipating up to 125 W under worst-case dropout.

Use Value: 1 °C/W R_thj-case allows stable operation with modest heatsinking at full rated current.

Use Scenario: Main pass device in high-current switched-mode power supply (SMPS) post-regulation stage.

IC Role / Device Role / Timing Role: Final linear regulation stage ensuring low-noise, ripple-free output for sensitive analog loads.

Use Value: High h_FE minimizes base drive current demand, simplifying auxiliary bias circuitry.

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 flyback SMPS primary switching; less ideal for linear audio due to higher saturation loss	Select when higher breakdown voltage is needed and thermal budget allows larger heatsink
2N3055	Legacy TO-3 package, lower I_C (15 A), higher R_thj-case (1.5 °C/W), no ECOPACK	Compatible with vintage repair and low-volume prototyping but lacks modern thermal and environmental specs	Prefer only for legacy system replacement where footprint and RoHS compliance are not constraints

Compared with MJE13009 and 2N3055, the TIP35C offers superior thermal performance (1 °C/W), tighter V_CE(sat) control at high current, and RoHS-compliant packaging-making it optimal for new industrial amplifier and motor control designs requiring reliability and manufacturability.

Availability

TIP35C is available at Aetrix Electronics and suitable for audio amplifier output stages, DC motor drivers, linear voltage regulators, and SMPS pass transistor applications requiring stable component supply and long-term industrial availability.

Supply support for TIP35C 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, specializing in power, analog, MCU, and sensor technologies for industrial, automotive, and consumer markets.

The TIP35C belongs to ST's high-power bipolar transistor product line, engineered for robust linear and switching operation in demanding thermal environments-targeting audio, power conversion, and motion control systems.

FAQ

What is the maximum safe continuous collector current for TIP35C?

The TIP35C is rated for 25 A continuous collector current at T_case = 25 °C. Operation above this requires linear derating: current must decrease by 0.167 A/°C above 25 °C case temperature, reaching zero at 175 °C case-though max junction temperature remains limited to 150 °C per specification.

Can TIP35C be used in parallel configurations?

Yes, but only with emitter resistors (typically 0.1–0.22 Ω) to ensure current sharing. The device's positive temperature coefficient of V_CE(sat) provides inherent thermal stability, but mismatched h_FE and layout asymmetry necessitate external balancing for reliable multi-device operation.

Is TIP35C pin-compatible with TIP35A or TIP35B?

No. TIP35A (60 V V_CEO) and TIP35B (80 V V_CEO) share the same TO-247 package and pinout, but differ in voltage rating and internal doping-substitution requires verification of circuit voltage margins and thermal performance under identical operating conditions.

Does TIP35C require a heatsink in all applications?

Yes-any application drawing >2 A continuously requires heatsinking. At 25 A and 125 W dissipation, a heatsink with thermal resistance ≤0.8 °C/W (including interface resistance) is mandatory to maintain T_j ≤150 °C. Even at 5 A, a small heatsink is recommended for reliability in enclosed environments.

TIP35C 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

TIP35C FAQ

1.How can I place an order for TIP35C through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP35C 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 TIP35C reliable?

The price and inventory of TIP35C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP35C is usually 5 days.

3.What payment methods are accepted for TIP35C?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP35C transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP35C?

TIP35C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP35C 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 TIP35C?

For technical support, including TIP35C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP35C requirements.

6.How does Aetrix verify that TIP35C is sourced from the original manufacturer or authorized distributors?

All TIP35C 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 TIP35C meets industry standards.

7.What is the process for return or replacement of TIP35C?

All TIP35C units undergo pre-shipment inspection (PSI). If there is an issue with TIP35C, 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 TIP35C part is unused and in its original packaging.

Return procedure for TIP35C:

1.Submit a request within 90 days.

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

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