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onsemi NSS40301CTWG
- Part No.:
- NSS40301CTWG
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SOT-1023, 4-LFPAK
- Datasheet:
-
NSS40301CTWG.pdf
- Description:
- TRANS NPN 40V 3A LFPAK4
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
NSS40301CTWG from onsemi is an NPN bipolar power transistor in the e2PowerEdge family, optimized for high-efficiency, low-voltage switching. It delivers 3.0 A continuous collector current, 40 V VCEO, and ultra-low saturation voltage (0.050 V at IC = 0.5 A, IB = 50 mA), enabling high-current switching in space-constrained DC–DC converters and battery-powered portable electronics.
For engineers reviewing the NSS40301CTWG datasheet, pinout, applications, or equivalent options, key selection criteria include its LFPAK4 5×6 wettable-flank package, AEC-Q101 qualification (via NSV variant), VCE(sat) performance across load range, thermal resistance (RθJC = 58°C/W), and hFE stability from −55°C to +150°C.
Technical Context
This device operates as a medium-power NPN switch with fixed gain architecture-no integrated biasing or protection circuitry. Its design emphasizes fast turn-on/turn-off via low Cib (170 pF) and high fT (215 MHz), while maintaining robust safe operating area (SOA) up to 10 A/10 V for transient pulse loads.
The LFPAK4 5×6 package enables direct thermal coupling to PCB copper, supporting high-current density operation without heatsinks in compact layouts. Wettable flanks allow automated optical inspection (AOI) in automotive applications such as airbag control units and instrument clusters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 V - Maximum blocking voltage before breakdown in common-emitter configuration; suitable for 24 V system rails and 36 V peak transients. |
| IC (cont) | 3.0 A - Continuous collector current rating at TC = 25°C; defines steady-state power stage capacity in buck converter output stages. |
| VCE(sat) | 0.050 V @ IC=0.5 A, IB=50 mA - Ultra-low saturation voltage reduces conduction loss by >60% vs. standard BJT alternatives at light-to-moderate loads. |
| hFE | 220–600 - Wide DC current gain range supports stable base drive design across production lots and temperature extremes (−55°C to +150°C). |
| fT | 215 MHz - Current-gain bandwidth product enables reliable operation up to ~10–20 MHz switching frequencies in hard-switched topologies. |
| RθJA | 58°C/W - Junction-to-case thermal resistance allows ≥2 W dissipation with minimal thermal pad area; critical for thermally dense mobile PCBs. |
| Cob | 25 pF - Low output capacitance minimizes switching losses and improves efficiency in high-frequency DC–DC converters. |
Pinout & Package
Housed in LFPAK4 5×6 (Case 760AB), a surface-mount, ultra-slim package with exposed drain-connected copper pad and wettable flanks for AOI compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 (Emitter) | Emitter terminal (common emitter connection) | Three parallel pins reduce bond wire inductance and improve current sharing; connected directly to internal emitter die region. |
| 4 (Base) | Control input for transistor turn-on/turn-off | Single-pin base connection optimized for low-inductance gate drive routing; requires external series resistor for current limiting. |
| 5 (Collector) | Main power output terminal | Exposed copper pad (pin 5) serves as primary thermal and electrical path to PCB; must be soldered to large copper pour for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VCE(sat) | 0.050 V at IC = 0.5 A enables <15 mW conduction loss per switch in 1 A load paths-critical for portable device battery life. |
| LFPAK4 wettable flanks | Enables 100% automated optical inspection of solder joints in automotive safety-critical modules without X-ray. |
| AEC-Q101 qualified variant | NSV40301CTWG meets stress test requirements for automotive electronics; NSS40301CTWG shares identical die and package but is industrial-grade. |
| Pb-free, Halogen-free | RoHS-compliant construction supports global environmental compliance without derating or reliability trade-offs. |
| High hFE consistency | Min hFE = 220 at IC = 0.5 A ensures predictable base drive requirements across temperature and process variation. |
Applications
| DC–DC Buck Converter Output Stage | Portable Device Power Management |
|---|---|
Use Scenario: High-efficiency synchronous or pseudo-synchronous buck converter in smartphone PMIC subsystems. IC Role / Device Role / Timing Role: Main switching transistor handling 1–3 A load currents at 500 kHz–2 MHz switching frequency. Use Value: 0.050 V VCE(sat) reduces conduction loss by 45% vs. standard 0.1 V BJTs, extending battery runtime in 3.7 V Li-ion systems. | Use Scenario: Load switching for camera flash LED drivers or USB OTG power enable in digital cameras and MP3 players. IC Role / Device Role / Timing Role: Low-side power switch controlling 2–3 A pulsed loads with fast turn-on (<100 ns) and minimal overshoot. Use Value: 215 MHz fT and 170 pF Cib ensure clean edge fidelity and reduced EMI during 10–50 kHz burst-mode operation. |
| Automotive Body Control Module | Industrial Sensor Interface Protection |
Use Scenario: Driving solenoids and relays in door lock actuators and HVAC damper controls within BCMs. IC Role / Device Role / Timing Role: Robust NPN switch interfacing microcontroller GPIO to inductive loads with flyback diode integration. Use Value: 40 V VCEO withstands ISO 7637-2 load dump transients; wettable flanks support zero-defect AOI in PPAP-managed production lines. | Use Scenario: Overcurrent protection and signal-level translation in 24 V industrial sensor nodes with 4–20 mA loop interfaces. IC Role / Device Role / Timing Role: Current-limited switch isolating fault-prone analog front-end from main controller during surge events. Use Value: 3.0 A IC rating and 150°C TJ(max) allow sustained operation in unventilated enclosures; low VCE(sat) prevents self-heating-induced trip instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25040DFHTA | Higher VCEO (60 V), lower IC (2.5 A), SOT-23 package (no wettable flanks), RθJA = 200°C/W | Suitable for lower-current, higher-voltage general-purpose switching; not AOI-compatible or automotive-qualified | Select when board space is extremely limited and thermal budget allows higher junction rise. |
| MMBT4401LT1G | Lower IC (600 mA), higher VCE(sat) (0.75 V), SOT-23 package, no AEC-Q101 option | Cost-optimized for low-power logic-level switching; unsuitable for >1 A continuous loads or thermal-critical designs | Choose only for non-power, signal-level amplification or low-duty-cycle indicator driving. |
Compared with ZXTN25040DFHTA and MMBT4401LT1G, NSS40301CTWG uniquely combines 3.0 A current capability, 0.050 V ultra-low saturation voltage, and LFPAK4 wettable-flank packaging-making it the only option among the three qualified for automotive AOI and capable of sustaining >2 W dissipation without forced cooling.
Availability
NSS40301CTWG is available at Aetrix Electronics and suitable for DC–DC converters, portable device power management, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for NSS40301CTWG 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The e2PowerEdge family-including NSS40301CTWG-is engineered specifically for high-efficiency, low-voltage switching in thermally constrained and space-limited applications such as portable electronics and automotive ECUs.
FAQ
What is the maximum continuous collector current rating for NSS40301CTWG?
The NSS40301CTWG is rated for 3.0 A continuous collector current at case temperature (TC) = 25°C, as specified in the Absolute Maximum Ratings table. Derating applies above 25°C per the power derating curve in Figure 1; at TC = 100°C, usable IC drops to approximately 1.2 A. This rating assumes proper PCB copper thermal relief and mounting on ≥645 mm² FR-4 collector pad.
Does NSS40301CTWG have automotive qualification?
The NSS40301CTWG itself is an industrial-grade part, but its automotive-qualified counterpart is NSV40301CTWG-identical die and LFPAK4 5×6 package, with AEC-Q101 qualification and PPAP capability. NSS40301CTWG shares all electrical and thermal specifications, but lacks the automotive-specific change control and traceability documentation required for Tier 1 automotive programs.
What is the VCE(sat) performance of NSS40301CTWG across operating conditions?
NSS40301CTWG achieves 0.050 V VCE(sat) at IC = 0.5 A / IB = 50 mA, 0.100 V at IC = 1.0 A / IB = 20 mA, and 0.200 V at IC = 3.0 A / IB = 0.3 A. These values are measured at TC = 25°C; VCE(sat) increases ~0.5 mV/°C with junction temperature rise, as confirmed in Figure 4 of the datasheet.
Can NSS40301CTWG replace a MOSFET in low-side switching applications?
NSS40301CTWG can serve as a cost-effective BJT alternative to small-signal MOSFETs in low-side switching where gate drive simplicity and low VGS(th) dependency are less critical. However, it requires base current drive (vs. voltage drive), exhibits higher conduction loss than comparable MOSFETs above 1 A, and lacks inherent reverse body diode functionality-external flyback diodes remain necessary for inductive loads.
What package dimensions and soldering guidelines apply to NSS40301CTWG?
NSS40301CTWG uses LFPAK4 5×6 (Case 760AB), measuring 5.0 mm × 6.0 mm × 0.9 mm with 0.65 mm pitch. The exposed collector pad (Pin 5) must be soldered to ≥100 mm² copper area with ≥4 thermal vias (0.3 mm diameter) for optimal thermal performance. Reflow profile follows J-STD-020D, peak temperature ≤260°C for ≤30 seconds.
NSS40301CTWG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-1023, 4-LFPAK
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 200mV @ 300mA, 3A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 1A, 1V
- Power - Max:
- 2 W
- Frequency - Transition:
- 215MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK4 (5x6)
NSS40301CTWG FAQ
1.How can I place an order for NSS40301CTWG through Aetrix?
Please submit a Request for Quotation (RFQ) for NSS40301CTWG 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 NSS40301CTWG reliable?
The price and inventory of NSS40301CTWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NSS40301CTWG is usually 5 days.
3.What payment methods are accepted for NSS40301CTWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NSS40301CTWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NSS40301CTWG?
NSS40301CTWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NSS40301CTWG 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 NSS40301CTWG?
For technical support, including NSS40301CTWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NSS40301CTWG requirements.
6.How does Aetrix verify that NSS40301CTWG is sourced from the original manufacturer or authorized distributors?
All NSS40301CTWG 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 NSS40301CTWG meets industry standards.
7.What is the process for return or replacement of NSS40301CTWG?
All NSS40301CTWG units undergo pre-shipment inspection (PSI). If there is an issue with NSS40301CTWG, 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 NSS40301CTWG part is unused and in its original packaging.
Return procedure for NSS40301CTWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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