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Texas Instruments LM395T/NOPB
- Part No.:
- LM395T/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
LM395T/NOPB.pdf
- Description:
- TRANS NPN 36V 2.2A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:678
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Product details
Overview
LM395T/NOPB from Texas Instruments is a monolithic ultra-reliable power transistor in TO-220 package, rated for 0°C to +125°C operation, delivering ≥1.0A output current with 2.0V saturation voltage and 500 ns switching time. It integrates thermal limiting, current limiting, and power limiting for overload protection in lamp drivers, solenoid controls, and voltage regulators.
For engineers reviewing the LM395T/NOPB datasheet, LM395T/NOPB pinout, LM395T/NOPB application, or LM395T/NOPB equivalent, key selection considerations include its 36V collector-emitter breakdown rating, 3.0 μA typical base current, direct CMOS/TTL interface capability, and internal protection architecture eliminating external foldback circuitry.
Technical Context
The LM395T/NOPB implements a fully integrated bipolar power transistor with on-die thermal shutdown, current foldback, and safe-area protection-functions not replicable with discrete BJT+diode+resistor combinations. Its architecture enables stable operation without external compensation in emitter-follower configurations when a 5.0kΩ base series resistor is used.
It operates as a high-gain, fast-switching power switch with 2.0V VCE(sat) at 1.0A and 500 ns turn-on/turn-off times under 36V/36Ω load conditions. The device supports direct drive from logic-level sources up to 40V base voltage without damage, enabling simplified gate-drive design in industrial control interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Collector-Emitter Voltage (VCEO) | 36 V - Maximum sustainable blocking voltage before breakdown; defines max supply rail in switching applications. |
| Continuous Collector Current (IC) | 1.0 A (min) - Guaranteed load current capability in TO-220 package at TA = 25°C; derates with junction temperature. |
| Saturation Voltage (VCE(sat)) | 2.0 V (typ) - Low conduction loss at 1.0A; enables <1.5W dissipation in 1A lamp/solenoid driver stage. |
| Switching Time | 500 ns - Fast transition between on/off states; supports ≤1 MHz square-wave switching in oscillator or PWM circuits. |
| Base Current (IB) | 3.0 μA (typ) - Ultra-low drive requirement; allows direct interface with CMOS outputs without buffer stages. |
| Thermal Resistance (RθJC) | 4.0 °C/W - Junction-to-case thermal impedance in TO-220 package; determines heatsink sizing for >1W continuous operation. |
| Operating Temperature Range | 0°C to +125°C - Industrial-grade ambient range; excludes military (-55°C) capability of LM195 variant. |
Pinout & Package
LM395T/NOPB uses the standard TO-220 (NDE) 3-pin plastic package with metal tab connected to the collector. Pin 1 is Base, Pin 2 is Emitter, Pin 3 is Collector (tab). Mounting requires electrically isolated heatsinking due to collector-tab connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Base) | Control input | Accepts logic-level drive up to 40V; 3.0 μA typical bias current enables direct TTL/CMOS interfacing. |
| Pin 2 (Emitter) | Current return path | Connected internally to substrate ground plane; serves as low-impedance reference for load return in high-side or emitter-follower topologies. |
| Pin 3 (Collector / Tab) | Power output terminal | Electrically tied to metal mounting tab; must be insulated from chassis unless collector is system ground reference. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated thermal limiting | Automatic shutdown above safe junction temperature; eliminates need for external thermistors or shutdown ICs in overtemperature-prone environments. |
| 100% electrical burn-in | Factory-tested for early-life failure screening; improves field reliability in mission-critical industrial power stages. |
| Direct CMOS/TTL interface | No level-shifting or current amplification required; reduces component count and board space in digital-controlled power switches. |
| Internal current and power limiting | Prevents destructive latch-up during short-circuit or overload events; enables robust operation without external foldback resistors. |
| 40V base-emitter forward rating | Withstands transient overvoltage on base drive line; simplifies protection design in noisy industrial I/O interfaces. |
Applications
| Lamp Flasher Circuit | Solenoid Driver |
|---|---|
|
Use Scenario: Driving incandescent lamps in automotive or industrial signaling systems requiring 1A peak current and fast on/off transitions. IC Role / Device Role / Timing Role: High-current switch operating in saturated mode with 500 ns response; acts as digitally controlled load interface. Use Value: Eliminates discrete transistor + protection diode + current-limiting resistor stack; reduces bill-of-materials by ≥4 components per channel. |
Use Scenario: Controlling 24V DC solenoids in factory automation valves where inductive kickback and thermal cycling are common. IC Role / Device Role / Timing Role: Protected power switch with built-in energy dissipation management during coil de-energization. Use Value: Internal thermal limiting prevents coil-stuck failures caused by inadequate heatsinking or ambient temperature rise. |
| Voltage Follower Regulator | Optically Isolated Switch |
|
Use Scenario: Building 1.0A linear voltage followers for precision analog signal buffering in test equipment power supplies. IC Role / Device Role / Timing Role: Emitter-follower configured power stage with 2.0V VCE(sat) ensuring minimal dropout and high PSRR. Use Value: Enables stable follower operation with only a 5.0kΩ base series resistor-no external compensation needed. |
Use Scenario: Implementing galvanically isolated 1A switching in PLC output modules using optocoupler-driven base input. IC Role / Device Role / Timing Role: Final-stage power transistor driven by optocoupler output; provides isolation-rated current delivery. Use Value: Withstands 40V base drive transients from optocoupler output stages, improving long-term reliability vs. unprotected BJTs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-reliability power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM195H/NOPB | Wider temp range (−55°C to +150°C); higher 42V VCEO; TO-3 or TO-5 packages only. | Required for aerospace, military, or extended-temperature industrial environments where LM395T/NOPB's 0°C lower limit is insufficient. | Select LM195H/NOPB when operation below 0°C or above +125°C is mandatory; TO-220 footprint not available. |
| TIP35C | No integrated protection; discrete NPN with 100V VCEO, 25A IC, but requires external current/power/thermal limiting circuitry. | Suitable for high-voltage, high-current designs where protection is implemented separately via microcontroller or analog monitor ICs. | Choose TIP35C only if full custom protection design is acceptable and 36V rating is insufficient; adds ≥3 external components. |
Compared with LM195H/NOPB, LM395T/NOPB trades extended temperature range and higher voltage rating for TO-220 manufacturability and cost efficiency in commercial industrial applications; versus TIP35C, it delivers plug-and-play protection at the expense of voltage headroom and peak current capacity.
Availability
LM395T/NOPB is available at Aetrix Electronics and suitable for lamp flashers, solenoid drivers, and voltage follower regulators requiring stable component supply across industrial production cycles.
Supply support for LM395T/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 90 years of innovation history.
The LM395T/NOPB belongs to TI's legacy ultra-reliable power transistor family, designed specifically for industrial control systems demanding intrinsic overload protection without external circuitry.
FAQ
What is the maximum collector-emitter voltage rating for LM395T/NOPB?
The LM395T/NOPB has a maximum collector-emitter voltage (VCEO) rating of 36 V, as specified in the Absolute Maximum Ratings table. This value defines the upper limit of DC or peak repetitive voltage the device can block in open-circuit conditions. Exceeding 36 V risks irreversible breakdown and must be avoided in all operating modes including switching transients.
Does LM395T/NOPB require external heat sinking in 1A continuous operation?
Yes, LM395T/NOPB requires external heat sinking for 1A continuous operation. With a junction-to-case thermal resistance of 4.0°C/W and typical VCE(sat) of 2.0 V, power dissipation reaches ~2.0 W at 1A-raising junction temperature by ≥8°C/W × case-to-ambient thermal resistance. Without a heatsink, ambient-to-case resistance exceeds 60°C/W, causing rapid thermal shutdown; a minimum 10°C/W heatsink is recommended.
Can LM395T/NOPB be directly driven by a 3.3V CMOS microcontroller output?
Yes, LM395T/NOPB can be directly driven by a 3.3V CMOS microcontroller output. Its base-emitter forward voltage is 0.9 V at 1.0A collector current, and typical base current is only 3.0 μA-well within the drive capability of modern GPIO pins. No base resistor is required for logic-level switching, though a 5.0kΩ series resistor is recommended for stability in emitter-follower configurations.
What protection features are integrated into LM395T/NOPB?
LM395T/NOPB integrates three core protection features: thermal limiting (automatic shutdown above safe junction temperature), current limiting (foldback during overload), and power limiting (safe-area compliance). These functions are implemented on-die and require no external components-unlike discrete transistors that rely on separate sense resistors, thermistors, or foldback networks.
Is LM395T/NOPB RoHS compliant and lead-free?
Yes, LM395T/NOPB is RoHS compliant and lead-free. Per TI's packaging documentation, the part carries "Yes" for RoHS status and uses Sn (tin) lead finish. It meets JEDEC Level-1 moisture sensitivity requirements and is qualified for standard reflow soldering processes with peak temperatures up to 260°C.
LM395T/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 2.2 A
- Voltage - Collector Emitter Breakdown (Max):
- 36 V
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- -
- Frequency - Transition:
- -
- Operating Temperature:
- 0°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
LM395T/NOPB FAQ
1.How can I place an order for LM395T/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM395T/NOPB 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 LM395T/NOPB reliable?
The price and inventory of LM395T/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM395T/NOPB is usually 5 days.
3.What payment methods are accepted for LM395T/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM395T/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM395T/NOPB?
LM395T/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM395T/NOPB 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 LM395T/NOPB?
For technical support, including LM395T/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM395T/NOPB requirements.
6.How does Aetrix verify that LM395T/NOPB is sourced from the original manufacturer or authorized distributors?
All LM395T/NOPB 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 LM395T/NOPB meets industry standards.
7.What is the process for return or replacement of LM395T/NOPB?
All LM395T/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM395T/NOPB, 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 LM395T/NOPB part is unused and in its original packaging.
Return procedure for LM395T/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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