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onsemi NSS20501UW3T2G
- Part No.:
- NSS20501UW3T2G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- 3-WDFN Exposed Pad
- Datasheet:
-
NSS20501UW3T2G.pdf
- Description:
- TRANS NPN 20V 5A 3WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,779
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Product details
Overview
NSS20501UW3T2G from onsemi is a 20 V, 7.0 A NPN low VCE(sat) transistor in a WDFN3 package, featuring 31 mΩ equivalent RDS(on), 0.031 V typical VCE(sat) at 1.0 A/0.100 A drive, and 150 MHz fT. It serves as a high-efficiency switching element in portable DC–DC converters and battery-powered power management systems.
For engineers reviewing the NSS20501UW3T2G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low saturation voltage under high current, thermal performance on 500 mm² PCB copper, direct drive capability from PMU outputs, and suitability for automotive airbag deployment circuits.
Technical Context
This NPN transistor operates in saturation mode for high-efficiency switching, with VCE(sat) specified down to 0.007 V (min) at IC = 0.1 A/IB = 0.010 A and up to 0.135 V (max) at IC = 3.0 A/IB = 0.030 A. Its hFE remains stable from 180 to 325 across 10 mA–3.0 A collector currents, enabling predictable base drive design.
The device uses a thermally enhanced WDFN3 package with exposed thermal pad (RJL = 23 °C/W), supporting 1.5 W total dissipation on 500 mm² copper. Switching times are optimized for high-frequency operation: td ≤ 90 ns, tr ≤ 100 ns, tf ≤ 100 ns at VCC = 15 V and IC = 750 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 20 V - Maximum safe collector-emitter blocking voltage in open-base configuration. |
| IC (continuous) | 5.0 A - Continuous DC collector current rating at TA = 25 °C with 500 mm² copper. |
| VCE(sat) (typ) | 0.031 V at IC = 1.0 A / IB = 0.100 A - Enables <10 mW conduction loss per transistor at 1 A load. |
| hFE (min) | 180 at IC = 3.0 A / VCE = 2.0 V - Ensures reliable saturation with modest base drive current. |
| fT | 150 MHz - Supports switching frequencies up to ~15 MHz in optimized Class-A or Class-AB amplifier stages. |
| RJL | 23 °C/W - Low junction-to-lead thermal resistance enables efficient heat transfer to PCB copper pour. |
Pinout & Package
The NSS20501UW3T2G is housed in a 3-pin WDFN3 (Case 506AU) package measuring 2.0 × 2.0 × 0.75 mm with an exposed thermal pad. Pin 1 is Collector, Pin 2 is Base, Pin 3 is Emitter - confirmed by onsemi marking diagram and mechanical drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Collector) | High-current output node | Connected to load or switching rail; requires thermal relief to internal copper pour via exposed pad. |
| 2 (Base) | Control input | Driven directly from PMU GPIO or logic-level controller; 0.76 V typical VBE(sat) at 1.0 A ensures low drive power. |
| 3 (Emitter) | Current return path | Common reference for base drive and load return; tied to ground plane for minimal loop inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VCE(sat) | 0.031 V typical at 1.0 A enables >99% efficiency in 3.3 V or 5 V load switches. |
| High hFE stability | hFE ≥ 180 up to 3.0 A supports single-stage base drive without Darlington configuration. |
| Thermally enhanced WDFN3 | RJL = 23 °C/W allows 1.5 W dissipation on standard FR-4 with 500 mm² copper - no heatsink required. |
| Pb-free and RoHS-compliant | Meets JESD22-A114 HBM Class 3B and MM Class C ESD ratings for robust handling in assembly. |
Applications
| Portable DC–DC Converters | Battery-Powered Power Management |
|---|---|
|
Use Scenario: Step-down regulation in smartphones and digital cameras where input is 3.6–4.2 V Li-ion and output is 1.2–3.3 V for SoC cores. IC Role / Device Role / Timing Role: Primary switching transistor in synchronous buck converter topologies operating at 1–3 MHz. Use Value: 0.031 V VCE(sat) reduces conduction loss by >40% versus standard 0.15 V transistors at 1 A, extending battery runtime. |
Use Scenario: Load switching for USB peripherals and display backlight in PDAs and MP3 players. IC Role / Device Role / Timing Role: High-side or low-side power switch controlled by PMU GPIO with minimal external components. Use Value: Direct drive from 1.8 V/3.3 V PMU outputs eliminates level-shifting circuitry and saves board space. |
| Automotive Airbag Deployment | Low-Voltage Motor Control |
|
Use Scenario: Triggering squib firing circuits in airbag control units requiring fast, reliable current pulses. IC Role / Device Role / Timing Role: Final-stage current amplifier delivering 5 A pulses to pyrotechnic devices within strict timing windows. Use Value: 100 ns rise/fall times and 500 ns storage time ensure precise pulse width control critical for safe deployment. |
Use Scenario: Commutation driver for 5–12 V brush motors in disc drives and tape drives. IC Role / Device Role / Timing Role: Half-bridge low-side switch in H-bridge motor drivers operating at PWM frequencies up to 20 kHz. Use Value: 150 MHz fT and low Cibo (650 pF) minimize switching losses and EMI during rapid PWM transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN low VCE(sat) transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN2050UW-7 | 20 V, 5.0 A N-channel MOSFET; RDS(on) = 32 mΩ @ VGS = 4.5 V; gate-driven, not base-driven. | Requires gate driver or level-shifter for logic-level control; higher input capacitance (Ciss = 950 pF). | Preferred when gate drive is available and zero gate current is needed; not drop-in compatible due to drive architecture mismatch. |
| ZXTN2050ZTA | 20 V, 5.0 A NPN BJT; VCE(sat) = 0.12 V @ IC = 2.0 A; hFE = 100 min; SOT-23 package (RJA = 270 °C/W). | Higher saturation voltage and thermal resistance limit continuous current to ~1.5 A on standard PCB. | Acceptable for lower-power, cost-sensitive designs where 0.12 V VCE(sat) and SOT-23 footprint are acceptable trade-offs. |
Compared with DMN2050UW-7 and ZXTN2050ZTA, the NSS20501UW3T2G delivers superior thermal performance (RJL = 23 °C/W), lowest VCE(sat) (0.031 V), and highest current capability (7.0 A peak) in a compact WDFN3 package - making it optimal for space-constrained, high-efficiency portable and automotive switching applications.
Availability
NSS20501UW3T2G is available at Aetrix Electronics and suitable for portable DC–DC converters, battery-powered power management systems, and automotive airbag deployment circuits requiring stable component supply and long-term lifecycle support.
Supply support for NSS20501UW3T2G 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, cloud, and consumer markets.
The NSS20501UW3T2G belongs to onsemi's e2PowerEdge family of low VCE(sat) transistors, engineered specifically for high-efficiency, high-speed switching in battery-constrained and thermally demanding applications.
FAQ
What is the maximum continuous collector current rating for NSS20501UW3T2G?
The NSS20501UW3T2G has a maximum continuous collector current (IC) rating of 5.0 A at TA = 25 °C with 500 mm² of 1 oz copper on FR-4 PCB. This rating assumes proper thermal management via the exposed thermal pad; derating applies above 25 °C at 11.8 mW/°C.
Does NSS20501UW3T2G support direct drive from a 1.8 V PMU output?
Yes, the NSS20501UW3T2G supports direct drive from 1.8 V PMU outputs due to its high hFE (≥180 at 3.0 A) and low VBE(sat) (0.76 V typical at IC = 1.0 A). This eliminates need for external level shifters or buffer stages in portable power management designs.
What is the thermal resistance from junction to ambient for NSS20501UW3T2G on a standard PCB?
The NSS20501UW3T2G exhibits RJA = 85 °C/W when mounted on FR-4 with 500 mm² of 1 oz copper - significantly lower than the 143 °C/W value for 100 mm² layouts. This enables 1.5 W continuous power dissipation without forced airflow or heatsinks.
Is NSS20501UW3T2G qualified for automotive applications such as airbag systems?
Yes, the NSS20501UW3T2G is used in automotive airbag deployment circuits per onsemi's application guidance. Its 150 °C max junction temperature, fast switching (tr/tf ≤ 100 ns), and robust ESD rating (HBM Class 3B) meet functional safety requirements for critical pyrotechnic triggering.
What does the "UW3" suffix indicate in NSS20501UW3T2G?
The "UW3" suffix identifies the WDFN3 package variant (Case 506AU) with 2.0 × 2.0 mm body and 0.75 mm height. The "T2G" denotes tape-and-reel packaging (3000 units/reel) with Pb-free (RoHS-compliant) finish - consistent with onsemi's standardized ordering nomenclature.
NSS20501UW3T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 3-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 5 A
- Voltage - Collector Emitter Breakdown (Max):
- 20 V
- Vce Saturation (Max) @ Ib, Ic:
- 125mV @ 400mA, 4A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2A, 2V
- Power - Max:
- 875 mW
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 3-WDFN (2x2)
NSS20501UW3T2G FAQ
1.How can I place an order for NSS20501UW3T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NSS20501UW3T2G 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 NSS20501UW3T2G reliable?
The price and inventory of NSS20501UW3T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NSS20501UW3T2G is usually 5 days.
3.What payment methods are accepted for NSS20501UW3T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NSS20501UW3T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NSS20501UW3T2G?
NSS20501UW3T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NSS20501UW3T2G 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 NSS20501UW3T2G?
For technical support, including NSS20501UW3T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NSS20501UW3T2G requirements.
6.How does Aetrix verify that NSS20501UW3T2G is sourced from the original manufacturer or authorized distributors?
All NSS20501UW3T2G 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 NSS20501UW3T2G meets industry standards.
7.What is the process for return or replacement of NSS20501UW3T2G?
All NSS20501UW3T2G units undergo pre-shipment inspection (PSI). If there is an issue with NSS20501UW3T2G, 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 NSS20501UW3T2G part is unused and in its original packaging.
Return procedure for NSS20501UW3T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NSS20501UW3T2G Tags
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