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onsemi TIP145G
- Part No.:
- TIP145G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-247-3
- Datasheet:
-
TIP145G.pdf
- Description:
- TRANS PNP DARL 60V 10A TO-247-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,571
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Product details
Overview
TIP145G from onsemi is a PNP complementary silicon Darlington power transistor designed for low-frequency switching and general-purpose amplifier applications, with 60 Vdc collector-emitter sustaining voltage (VCEO(sus)), 10 A continuous collector current (IC), and 125 W total power dissipation at TC = 25°C - used in high-current linear regulators and motor control stages.
For engineers reviewing the TIP145G datasheet, pinout, applications, or equivalent options, key selection considerations include its monolithic Darlington structure with built-in base-emitter shunt resistor, thermal resistance of 1.0°C/W (junction-to-case), and guaranteed hFE ≥ 1000 at IC = 5.0 A, VCE = 4 V.
Technical Context
The TIP145G implements a monolithic Darlington pair with integrated ~8.0 kΩ base-emitter shunt resistor and ~40 Ω emitter resistor, enabling simplified biasing and improved turn-off behavior. Its PNP polarity supports complementary operation with NPN counterparts like TIP140G in push-pull output stages.
Rated for DC and low-frequency switching up to several kHz, it features VCEO(sus) = 60 Vdc (min) at IC = 30 mA, ICEO ≤ 2.0 mA at VCE = 30 Vdc, and safe operating area limited by both thermal constraints and secondary breakdown - validated per Figure 6 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(sus) | 60 Vdc minimum - defines maximum sustainable collector-emitter voltage before breakdown under open-base conditions. |
| IC (Continuous) | 10 Adc - supports high-current load driving without derating at TC = 25°C. |
| hFE | ≥1000 at IC = 5.0 A, VCE = 4 V - enables low base drive current requirements in amplifier or switch configurations. |
| VCE(sat) | 2.0 V max at IC = 5.0 A, IB = 10 mA - determines conduction loss and heat generation in saturated switching mode. |
| RJC | 1.0 °C/W - specifies junction-to-case thermal resistance, critical for heatsink sizing in high-power applications. |
| PD | 125 W at TC = 25°C - sets absolute maximum power handling before thermal shutdown or degradation. |
| Package | SOT-93 (TO-218) - industry-standard 4-pin power package with dual collector terminals for enhanced current capacity and thermal path. |
Pinout & Package
SOT-93 (TO-218) package with 4-terminal configuration: two collector pins (pins 2 and 4) share internal connection for parallel current handling and improved thermal dissipation; base (pin 1) and emitter (pin 3) provide standard Darlington control interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Input control terminal; connects to driver stage; internal shunt resistor improves turn-off speed. |
| 2 | Collector | Main high-current output node; electrically tied to pin 4 for doubled current capability and lower effective RDS(on). |
| 3 | Emitter | Power return path; common reference for load connection in high-side switch or amplifier output stage. |
| 4 | Collector | Second collector terminal; internally bonded to pin 2 - enables PCB layout flexibility and reduced trace resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Darlington with integrated resistors | Eliminates external base-emitter pull-down need and reduces component count in driver circuits. |
| High DC current gain (hFE ≥ 1000) | Reduces required base drive current by >10× versus single bipolar transistors, easing microcontroller GPIO interfacing. |
| Dual collector terminals (pins 2 & 4) | Supports 10 A continuous current with lower thermal impedance and improved reliability vs. single-collector packages. |
| Pb-free SOT-93 (TO-218) package | Meets RoHS compliance requirements and enables compatibility with lead-free reflow soldering processes. |
| −65°C to +150°C operating range | Enables deployment in industrial motor drives and automotive under-hood auxiliary systems without derating. |
Applications
| Linear Voltage Regulator | DC Motor Driver Stage |
|---|---|
Use Scenario: High-current series pass element in adjustable linear regulators delivering up to 8 A to analog instrumentation loads. IC Role / Device Role / Timing Role: PNP Darlington pass transistor regulating output voltage via feedback-controlled base bias. Use Value: Low VCE(sat) and high hFE minimize base drive burden and improve regulation accuracy under varying load conditions. |
Use Scenario: High-side switch in brushed DC motor H-bridge half-bridge sections for industrial automation actuators. IC Role / Device Role / Timing Role: PNP power switch controlling motor voltage rail during forward rotation phase. Use Value: Dual collector terminals reduce conduction losses and thermal hotspots during sustained 6–8 A motor stall currents. |
| Audio Power Amplifier Output | Relay/Solenoid Driver |
Use Scenario: Complementary output stage in Class AB audio amplifiers driving 4 Ω loudspeakers with peak currents >7 A. IC Role / Device Role / Timing Role: PNP output device paired with TIP140G in push-pull configuration for symmetrical signal swing. Use Value: Matched VCEO(sus) and hFE with NPN counterpart ensures balanced clipping thresholds and minimized crossover distortion. |
Use Scenario: High-current coil driver for industrial 24 VDC relays and hydraulic solenoids requiring >5 A inrush current handling. IC Role / Device Role / Timing Role: Saturated switch providing full coil voltage with fast turn-on/turn-off controlled by logic-level base drive. Use Value: Guaranteed storage time (ts) ≤ 2.5 μs and fall time (tf) ≤ 2.5 μs support reliable PWM-based coil current regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP Darlington power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD127G | TO-252 (DPAK) package, 80 V VCEO(sus), 8 A IC, RJC = 2.5°C/W - lower power rating and higher thermal resistance. | Preferred for surface-mount designs with moderate power (<80 W); unsuitable for 125 W conduction at TC = 25°C. | Select when board space is constrained and thermal management allows higher junction temperature rise. |
| TIP147G | Same SOT-93 package but rated for VCEO(sus) = 100 Vdc and identical 10 A/125 W specs - higher voltage headroom only. | Used where bus voltage exceeds 60 V (e.g., 80 V industrial supplies), otherwise electrically interchangeable in 60 V systems. | Choose only if system requires >60 V breakdown margin; otherwise TIP145G offers optimal cost/performance balance. |
Compared with MJD127G, TIP145G delivers 56% higher power dissipation and 2.5× lower thermal resistance - essential for forced-air-cooled linear regulators. Versus TIP147G, it provides identical thermal and current capability at lower cost and sufficient voltage margin for 48–60 V systems.
Availability
TIP145G is available at Aetrix Electronics and suitable for linear voltage regulators, DC motor drivers, audio power amplifiers, and relay/solenoid control circuits requiring stable component supply across industrial production cycles.
Supply support for TIP145G 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 energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The TIP145G belongs to onsemi's legacy silicon power transistor family engineered for rugged, high-current linear and switching applications - emphasizing reliability, thermal robustness, and ease of use in discrete power stages.
FAQ
What is the maximum collector-emitter sustaining voltage for TIP145G?
The TIP145G has a minimum collector-emitter sustaining voltage VCEO(sus) of 60 Vdc at IC = 30 mA and IB = 0, as specified in the off-characteristics table. This rating applies under open-base conditions and defines the upper limit for safe DC blocking capability before avalanche onset. Exceeding this voltage risks irreversible breakdown and device failure.
Does TIP145G require an external base-emitter resistor?
No, the TIP145G integrates a monolithic base-emitter shunt resistor (~8.0 kΩ) as part of its Darlington structure. This eliminates the need for an external pull-down resistor to ensure reliable turn-off, simplifying circuit design and reducing BOM count in amplifier and switching applications.
Can TIP145G be used in place of TIP147G?
TIP145G and TIP147G share identical package (SOT-93), pinout, thermal characteristics (RJC = 1.0°C/W), and current/power ratings (10 A, 125 W), differing only in VCEO(sus): 60 Vdc vs. 100 Vdc. Substitution is acceptable in systems operating ≤60 V, but not recommended where transient overvoltage or higher bus voltages exist.
What is the thermal resistance junction-to-case for TIP145G?
The TIP145G has a maximum thermal resistance of RJC = 1.0°C/W, measured from junction to case surface. This value is critical for heatsink selection - for example, at 100 W dissipation and 25°C case temperature, junction temperature will rise by 100°C, reaching 125°C, well within the −65°C to +150°C operating range.
Is TIP145G compatible with lead-free soldering processes?
Yes, TIP145G is a Pb-free device (indicated by the "G" suffix) and qualified for standard lead-free reflow profiles, including peak temperatures up to 260°C. The SOT-93 (TO-218) package meets JEDEC J-STD-020 moisture sensitivity level 1, allowing unlimited floor life when stored properly.
TIP145G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-247-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- PNP - Darlington
- Current - Collector (Ic) (Max):
- 10 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 3V @ 40mA, 10A
- Current - Collector Cutoff (Max):
- 2mA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 1000 @ 5A, 4V
- Power - Max:
- 125 W
- Frequency - Transition:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-247-3
TIP145G FAQ
1.How can I place an order for TIP145G through Aetrix?
Please submit a Request for Quotation (RFQ) for TIP145G 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 TIP145G reliable?
The price and inventory of TIP145G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP145G is usually 5 days.
3.What payment methods are accepted for TIP145G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP145G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TIP145G?
TIP145G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TIP145G 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 TIP145G?
For technical support, including TIP145G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP145G requirements.
6.How does Aetrix verify that TIP145G is sourced from the original manufacturer or authorized distributors?
All TIP145G 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 TIP145G meets industry standards.
7.What is the process for return or replacement of TIP145G?
All TIP145G units undergo pre-shipment inspection (PSI). If there is an issue with TIP145G, 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 TIP145G part is unused and in its original packaging.
Return procedure for TIP145G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TIP145G Tags
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MMBT3906LT1G
onsemi
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MMBT3906-7-F
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MMBT3904-TP
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MMBT2222A-7-F
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BC846BLT1G
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BC847B,215
Nexperia USA Inc.
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MMBTA06LT1G
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MMBT2222ALT1G
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