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

onsemi TIP41CTU

Name: TIP41CTU
Brand: onsemi
SKU: TIP41CTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP41CTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: TIP41CTU.pdf

Description:: TRANS NPN 100V 6A TO-220-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TIP41CTU from onsemi is an NPN silicon power transistor in TO-220AB package, rated for 100 V_CEO, 6 A continuous collector current, and 65 W total power dissipation at T_C = 25°C. It delivers h_FE ≥ 15 at I_C = 3.0 A, V_CE = 4.0 V, and exhibits V_CE(sat) ≤ 1.5 V at I_C = 6.0 A, I_B = 600 mA - used in linear amplifiers, motor drivers, and relay-switching circuits requiring robust thermal performance.

For engineers reviewing the TIP41CTU datasheet, pinout, applications, or equivalent options, this page provides verified electrical ratings, thermal derating behavior, safe operating area (SOA) limits, ESD robustness (HBM > 8 kV), and Pb-free compliance - all critical for industrial power stage design, discrete amplifier staging, and high-reliability switching implementations.

Technical Context

The TIP41CTU operates as a medium-power NPN bipolar junction transistor optimized for linear and saturated switching modes. Its SOA is defined up to 150°C junction temperature with secondary breakdown limits validated for pulse durations down to 1 µs, and thermal resistance R_JC = 1.67°C/W enables direct heatsink mounting.

It features complementary PNP pairing with TIP42C, shares identical TO-220AB mechanical footprint and pinout across the TIP41x family, and supports unclamped inductive load energy handling of 62.5 mJ under specified test conditions (I_C = 2.5 A, L = 20 mH, V_CC = 10 V).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Maximum collector-emitter voltage before breakdown; defines maximum supply rail compatibility in switching applications.
I_C (continuous)	6.0 A - Continuous DC collector current capability; sets upper bound for steady-state load drive without forced cooling.
P_D @ T_C = 25°C	65 W - Junction-to-case power dissipation limit; requires heatsink interface with thermal resistance ≤ 1.67°C/W for full rating.
h_FE @ I_C = 3.0 A	15–75 - DC current gain range at mid-load; determines required base drive current for saturation in switch mode.
V_CE(sat) @ I_C/I_B = 10	≤1.5 V - Saturation voltage at 6 A collector current; directly impacts conduction loss and thermal rise in power stages.
f_T	3.0 MHz - Transition frequency; supports audio-frequency amplification and low-speed switching (< 100 kHz) with stable gain.
R_JA	57°C/W - Junction-to-ambient thermal resistance; indicates natural-convection performance without heatsink (limited to ~2 W).

Pinout & Package

Package: TO-220AB (Case 221A), epoxy-molded plastic with UL 94 V-0 flammability rating and Pb-free option (TIP41CTU denotes Pb-free variant). Mounting tab is electrically connected to collector.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal	Low-side current return path; connects to ground or load return in common-emitter configurations.
2 (Base)	Control input	Current-driven gate; requires ~600 mA base drive for full saturation at 6 A collector current.
3 (Collector / Tab)	Main power output	Electrically tied to metal mounting tab; must be isolated from heatsink unless circuit ground reference permits.

Key Features

Feature	Design Value
ESD robustness (HBM)	Class 3B (>8 kV) - Enables handling without special ESD controls in standard assembly environments.
Unclamped inductive energy rating	62.5 mJ - Supports reliable switching of inductive loads like solenoids and relays without external snubbers under defined test conditions.
Junction temperature range	–65°C to +150°C - Allows operation in extended industrial and automotive under-hood environments.
Thermal resistance (R_JC)	1.67°C/W - Enables high-power operation with compact heatsinks; 65 W dissipation yields only ~109°C ΔT above case.
Pb-free compliance	RoHS-compliant per J-STD-609 - Meets global environmental regulations without compromising solderability or reliability.

Applications

Audio Power Amplifier Stage	DC Motor Driver (12–24 V)
Use Scenario: Final output stage in Class AB audio amplifiers delivering up to 25 W into 8 Ω loads. IC Role / Device Role / Timing Role: NPN power transistor in push-pull pair with TIP42C, providing current gain and voltage swing amplification. Use Value: V_CEO = 100 V and h_FE ≥ 15 at 3 A ensure headroom for 30 V rails and stable bias control across temperature.	Use Scenario: H-bridge half-bridge leg driving brushed DC motors in industrial actuators and HVAC dampers. IC Role / Device Role / Timing Role: High-current switching element controlling motor direction and speed via PWM at ≤20 kHz. Use Value: V_CE(sat) ≤ 1.5 V at 6 A minimizes conduction loss; SOA curve supports 100 ms stall current pulses without second breakdown.
Relay and Solenoid Driver	Linear Voltage Regulator Pass Element
Use Scenario: Driving 12 V/24 V electromagnetic relays and fuel injectors in control panels and PLC I/O modules. IC Role / Device Role / Timing Role: Saturated switch interfacing microcontroller GPIO to inductive coil loads. Use Value: Unclamped inductive energy rating of 62.5 mJ allows direct coil switching without flyback diode in low-duty-cycle applications.	Use Scenario: Series pass transistor in adjustable linear regulators supplying 3–5 A at up to 40 V differential. IC Role / Device Role / Timing Role: Heat-dissipating current-controlled element regulating output voltage via feedback loop. Use Value: R_JC = 1.67°C/W and 65 W rating enable stable 5 A operation with 20 V drop using moderate heatsinking.

Audio Power Amplifier Stage

DC Motor Driver (12–24 V)

Use Scenario: Final output stage in Class AB audio amplifiers delivering up to 25 W into 8 Ω loads.

IC Role / Device Role / Timing Role: NPN power transistor in push-pull pair with TIP42C, providing current gain and voltage swing amplification.

Use Value: V_CEO = 100 V and h_FE ≥ 15 at 3 A ensure headroom for 30 V rails and stable bias control across temperature.

Use Scenario: H-bridge half-bridge leg driving brushed DC motors in industrial actuators and HVAC dampers.

IC Role / Device Role / Timing Role: High-current switching element controlling motor direction and speed via PWM at ≤20 kHz.

Use Value: V_CE(sat) ≤ 1.5 V at 6 A minimizes conduction loss; SOA curve supports 100 ms stall current pulses without second breakdown.

Relay and Solenoid Driver

Linear Voltage Regulator Pass Element

Use Scenario: Driving 12 V/24 V electromagnetic relays and fuel injectors in control panels and PLC I/O modules.

IC Role / Device Role / Timing Role: Saturated switch interfacing microcontroller GPIO to inductive coil loads.

Use Value: Unclamped inductive energy rating of 62.5 mJ allows direct coil switching without flyback diode in low-duty-cycle applications.

Use Scenario: Series pass transistor in adjustable linear regulators supplying 3–5 A at up to 40 V differential.

IC Role / Device Role / Timing Role: Heat-dissipating current-controlled element regulating output voltage via feedback loop.

Use Value: R_JC = 1.67°C/W and 65 W rating enable stable 5 A operation with 20 V drop using moderate heatsinking.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD127G	TO-252 (DPAK), 80 V_CEO, 8 A I_C, lower R_JA (60°C/W), no tab isolation	Suitable for surface-mount PCBs; not mechanically interchangeable due to different package and pinout.	Select when space-constrained layouts require SMT assembly and thermal pad soldering is feasible.
BD249C	TO-126, 80 V_CEO, 3 A I_C, lower P_D (25 W), higher h_FE (40–250)	Limited to lower-power linear stages; insufficient for 6 A switching or 65 W dissipation.	Choose only for cost-sensitive, low-current amplifier biasing where gain linearity matters more than power handling.

Compared with MJD127G and BD249C, the TIP41CTU offers superior through-hole mechanical robustness, higher voltage margin (100 V vs. 80 V), and proven thermal performance in legacy power designs - making it preferred for field-replaceable, serviceable, and high-reliability discrete power stages.

Availability

TIP41CTU is available at Aetrix Electronics and suitable for industrial motor control, audio amplifier production, and power supply manufacturing requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for TIP41CTU 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in power management, analog, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The TIP41CTU belongs to onsemi's legacy silicon power transistor family designed for general-purpose amplifier and switching applications - emphasizing ruggedness, manufacturability, and broad thermal operating range over high-frequency optimization.

FAQ

What is the maximum safe collector-emitter voltage for TIP41CTU?

The TIP41CTU has a guaranteed minimum V_CEO rating of 100 Vdc under specified test conditions (I_C = 30 mA, I_B = 0). This rating applies across its full operating temperature range (–65°C to +150°C) and defines the absolute maximum supply voltage that can be applied between collector and emitter without risk of avalanche breakdown. Derating is not required below 100 V, but transient overvoltage protection remains advisable in inductive switching applications.

Does TIP41CTU have a built-in base-emitter resistor?

No, the TIP41CTU does not include any internal base-emitter resistor. It is a standard three-terminal bipolar junction transistor requiring external base drive circuitry. Base current must be supplied directly via a series resistor or active driver stage. The device's V_BE(on) is specified as ≤2.0 V at I_C = 6.0 A and V_CE = 4.0 V, confirming conventional BJT behavior without integrated biasing components.

Can TIP41CTU be used in parallel for higher current handling?

Parallel operation of TIP41CTU devices is not recommended without individual emitter resistors and matched h_FE selection. Due to positive thermal coefficient of V_BE, unequal current sharing can occur under thermal stress, leading to thermal runaway. The datasheet does not specify matching tolerances or recommend paralleling; instead, higher-current alternatives like MJ15003 or discrete MOSFETs are advised for >6 A requirements.

Is the metal tab of TIP41CTU electrically connected to any pin?

Yes, the metal mounting tab of the TIP41CTU is internally connected to the collector terminal (Pin 3). This is confirmed by the TO-220AB package diagram and thermal characterization data showing R_JC referenced to the tab. Electrical isolation from the heatsink is mandatory unless the heatsink is held at collector potential - otherwise, short-circuit or safety hazards may result.

What is the typical DC current gain (h_FE) of TIP41CTU at 1 A collector current?

At I_C = 1.0 A and V_CE = 4.0 V, the TIP41CTU exhibits h_FE typically between 30 and 75, as shown in Figure 8 of the datasheet. This range reflects unit-to-unit variation and temperature dependence; design should use the minimum guaranteed value (h_FE ≥ 30 at I_C = 0.3 A, and ≥15 at I_C = 3.0 A) for worst-case base drive sizing. No h_FE specification is given at exactly 1 A, so interpolation from adjacent test points is acceptable for preliminary analysis.

TIP41CTU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 6 A

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

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 600mA, 6A

Current - Collector Cutoff (Max):: 700µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 15 @ 3A, 4V

Power - Max:: 2 W

Frequency - Transition:: 3MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-3

TIP41CTU FAQ

1.How can I place an order for TIP41CTU through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP41CTU 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 TIP41CTU reliable?

The price and inventory of TIP41CTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP41CTU is usually 5 days.

3.What payment methods are accepted for TIP41CTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP41CTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP41CTU?

TIP41CTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP41CTU 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 TIP41CTU?

For technical support, including TIP41CTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP41CTU requirements.

6.How does Aetrix verify that TIP41CTU is sourced from the original manufacturer or authorized distributors?

All TIP41CTU 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 TIP41CTU meets industry standards.

7.What is the process for return or replacement of TIP41CTU?

All TIP41CTU units undergo pre-shipment inspection (PSI). If there is an issue with TIP41CTU, 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 TIP41CTU part is unused and in its original packaging.

Return procedure for TIP41CTU:

1.Submit a request within 90 days.

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

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