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

STMicroelectronics TIP33C

Name: TIP33C
Brand: STMicroelectronics
SKU: TIP33C
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP33C

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-247-3

Datasheet:: TIP33C.pdf

Description:: TRANS NPN 100V 10A TO-247-3

Quantity:: RFQ Add To RFQ list

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Inventory:3,594

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Product details

Overview

TIP33C from STMicroelectronics is a complementary NPN power transistor in TO-247 package, rated for 100 V V_CEO, 10 A I_C, and 80 W P_TOT at T_case = 25 °C, with low 1 V V_CE(sat) at I_C = 3 A / I_B = 0.3 A; used in linear regulators and switching power supplies.

For engineers reviewing the TIP33C datasheet, TIP33C pinout, TIP33C application, or TIP33C equivalent, key selection factors include its 100 V blocking capability, 1.56 °C/W R_thj-case, 40–100 h_FE range at I_C = 1 A, and suitability for high-current DC-DC converter output stages and motor drive half-bridges.

Technical Context

The TIP33C is an epitaxial-base planar NPN bipolar junction transistor designed for linear and switching power applications. It operates with V_CEO = 100 V, I_C = 10 A continuous, and supports pulsed collector current up to 15 A for t_P < 5 ms.

Its thermal resistance of 1.56 °C/W (junction-to-case) enables direct mounting to heatsinks without thermal interface material in moderate-power designs, and its f_T = 3 MHz supports stable operation in audio-frequency switching and analog amplification circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - maximum safe collector-emitter voltage with base open; defines upper rail limit in switching topologies
I_C	10 A - continuous collector current rating; sets minimum heatsink sizing for sustained conduction
V_CE(sat)	1 V @ I_C = 3 A, I_B = 0.3 A - low saturation voltage reduces conduction loss in linear regulators
h_FE	40–100 @ I_C = 1 A, V_CE = 4 V - wide DC gain range requires base drive margining in emitter-follower configurations
R_thj-case	1.56 °C/W - enables 51 °C temperature rise per watt dissipated when mounted to bare metal heatsink
f_T	3 MHz - sufficient for audio-band amplifiers and <100 kHz PWM switching without phase instability

Pinout & Package

TO-247 package: isolated tab (collector), 3-pin vertical mount with center emitter and right-side base (viewed from front, tab facing away).

Pin/Terminal	Circuit Role	Design Meaning
1 (Left)	Base	Current-controlled input terminal; requires ≥0.3 A drive for full 3 A collector conduction
2 (Center)	Emitter	Common return path; electrically tied to PCB ground plane in low-side switch configurations
3 (Right)	Collector	Main power output terminal; connected to heatsink tab for thermal conduction and electrical isolation

Key Features

Feature	Design Value
Low V_CE(sat)	1 V at 3 A ensures ≤3 W conduction loss in 12 V/3 A linear regulator output stage
High I_C rating	10 A continuous current supports motor drivers up to 120 W mechanical output with 80% efficiency
Robust thermal design	1.56 °C/W R_thj-case allows operation at 125 °C junction temp with 64 W dissipation on standard 0.5 °C/W heatsink
ECOPACK® compliance	Lead-free second-level interconnect meets RoHS and JEDEC JESD97 marking requirements

Applications

Linear Voltage Regulator

DC Motor Driver

Use Scenario: Adjustable 3–24 V, 3 A linear regulator using LM317 pre-regulator and TIP33C pass transistor.

IC Role / Device Role / Timing Role: Power pass element handling >90% of load current and thermal dissipation.

Use Value: 1 V V_CE(sat) limits dropout to 1.25 V + 1 V = 2.25 V, enabling regulation down to 3 V input.

Use Scenario: Unidirectional 24 V, 5 A brushed DC motor control with freewheeling diode.

IC Role / Device Role / Timing Role: High-side switch controlling motor supply rail in H-bridge half-bridge configuration.

Use Value: 100 V V_CEO accommodates 40 V inductive kickback during turn-off without clamping circuitry.

Audio Power Amplifier

Switch-Mode Power Supply

Use Scenario: Class-AB 20 W audio output stage driving 8 Ω speaker with ±15 V rails.

IC Role / Device Role / Timing Role: Complementary NPN output device paired with TIP34C in push-pull topology.

Use Value: 3 MHz f_T preserves signal integrity up to 20 kHz with <1% THD at full output.

Use Scenario: 48 V input, 12 V/6 A flyback converter primary-side switch.

IC Role / Device Role / Timing Role: Main switching transistor operating at 60 kHz with resistive base drive.

Use Value: 15 A I_CM peak rating handles 2× startup surge current without secondary breakdown.

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	Higher V_CEO = 400 V, lower h_FE = 8–40, same TO-247 package	Better suited for offline SMPS primary side; less ideal for linear regulation due to higher V_CE(sat)	Select when >200 V blocking is required and gain stability at low I_C is acceptable
TIP3055	Same V_CEO = 100 V, identical pinout, but R_thj-case = 2.5 °C/W and V_CE(sat) = 1.5 V @ 3 A	Requires larger heatsink and delivers lower efficiency in linear applications	Choose only if legacy board layout mandates exact footprint compatibility with older designs

Compared with MJE13009 and TIP3055, the TIP33C offers optimal balance of low saturation voltage, predictable DC gain, and thermal performance for medium-power linear and switching circuits where 100 V rating suffices.

Availability

TIP33C is available at Aetrix Electronics and suitable for linear voltage regulators, DC motor drivers, audio amplifiers, and switch-mode power supplies requiring stable component supply across industrial and embedded production cycles.

Supply support for TIP33C 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 TIP33C belongs to ST's legacy power bipolar transistor family, engineered specifically for cost-sensitive, medium-power linear and switching applications where robustness, thermal reliability, and proven manufacturability are prioritized over ultra-high frequency or digital integration.

FAQ

Is the TIP33C RoHS-compliant?

Yes, the TIP33C is manufactured in ECOPACK® packaging with lead-free second-level interconnect, compliant with RoHS Directive 2011/65/EU and marked per JEDEC Standard JESD97. The inner box label specifies the environmental category and soldering profile limits.

What is the maximum safe operating frequency for TIP33C in switching mode?

The TIP33C has a transition frequency f_T of 3 MHz, but practical switching use is limited to ≤100 kHz due to storage time (t_s = 0.4 µs) and fall time (t_f = 1 µs). Above 60 kHz, switching losses increase significantly unless base drive is actively clamped.

Can TIP33C be used in parallel with other units for higher current?

No-TIP33C lacks built-in emitter ballasting resistors and exhibits positive thermal feedback. Parallel operation without external emitter resistors causes current hogging and thermal runaway. For >10 A, use a single higher-rated device or a MOSFET-based solution.

Does TIP33C require a heatsink in all applications?

A heatsink is mandatory when power dissipation exceeds 1.9 W (calculated as (T_Jmax − T_amb) / R_thj-amb). At 25 °C ambient and no heatsink (R_thj-amb ≈ 62.5 °C/W), max safe P_D = 2 W. For any sustained I_C > 1 A at V_CE > 2 V, a heatsink with R_th ≤ 10 °C/W is required.

TIP33C Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-247-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 10 A

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

Vce Saturation (Max) @ Ib, Ic:: 4V @ 2.5A, 10A

Current - Collector Cutoff (Max):: 700µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 20 @ 3A, 4V

Power - Max:: 80 W

Frequency - Transition:: 3MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

TIP33C FAQ

1.How can I place an order for TIP33C through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP33C 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 TIP33C reliable?

The price and inventory of TIP33C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP33C is usually 5 days.

3.What payment methods are accepted for TIP33C?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP33C transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP33C?

TIP33C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP33C 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 TIP33C?

For technical support, including TIP33C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP33C requirements.

6.How does Aetrix verify that TIP33C is sourced from the original manufacturer or authorized distributors?

All TIP33C 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 TIP33C meets industry standards.

7.What is the process for return or replacement of TIP33C?

All TIP33C units undergo pre-shipment inspection (PSI). If there is an issue with TIP33C, 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 TIP33C part is unused and in its original packaging.

Return procedure for TIP33C:

1.Submit a request within 90 days.

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

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