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onsemi NSS40301MZ4T3G
- Part No.:
- NSS40301MZ4T3G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
NSS40301MZ4T3G.pdf
- Description:
- TRANS NPN 40V 3A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:1,515
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Product details
Overview
NSS40301MZ4T3G from onsemi is an NPN bipolar power transistor in SOT-223 package, rated for 40 V VCEO, 3.0 A continuous collector current, and ultra-low 0.200 V VCE(sat) at IC = 3.0 A / IB = 0.3 A. It delivers high DC current gain (hFE = 100 min at IC = 3.0 A), operates from –55 °C to +150 °C, and is optimized for low-voltage, high-speed switching in portable DC–DC converters and battery-powered systems.
For engineers reviewing the NSS40301MZ4T3G datasheet, pinout, applications, or equivalent options, key selection criteria include verified VCE(sat) performance at full load, thermal resistance on standard PCB pads, AEC-Q101 qualification status, and compatibility with PMU-driven base control in space-constrained power management designs.
Technical Context
This device belongs to onsemi's e2PowerEdge family of low-saturation-voltage transistors, engineered specifically for energy-efficient switching where minimal conduction loss is critical. Its linear gain (Beta) behavior supports both digital switching and analog amplification roles, and its 215 MHz fT enables stable operation in high-frequency PWM circuits up to several hundred kHz.
The NSS40301MZ4T3G uses a monolithic silicon die in SOT-223 (Case 318E, Style 1) with dual collector terminals (pins 2 and 4) for enhanced thermal dissipation. Its 64 °C/W RθJC and 155 °C/W RθJA (on small pad) reflect design trade-offs between board-level thermal management and compact footprint - critical for portable electronics with limited copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 V - Maximum safe collector-emitter voltage before breakdown; defines upper limit for DC-DC converter input or motor drive rail voltage. |
| IC (cont.) | 3.0 A - Continuous collector current rating; supports sustained 3 A load switching without derating at TC ≤ 25 °C. |
| VCE(sat) | 0.200 V @ IC = 3.0 A, IB = 0.3 A - Ultra-low saturation voltage reduces conduction loss to < 0.6 W, enabling >95% efficiency in 3.3 V/5 V buck stages. |
| hFE | 100 min @ IC = 3.0 A - High current gain ensures reliable saturation with modest base drive (300 mA), easing integration with low-current PMU outputs. |
| fT | 215 MHz - Current-gain bandwidth product confirms suitability for PWM frequencies up to ~500 kHz with stable gain margin. |
| RθJA | 155 °C/W (on 7.6 mm² pad) - Thermal resistance under minimal PCB copper; dictates maximum ambient temperature for 150 °C junction limit at 3 A. |
| TJ range | –55 °C to +150 °C - Full automotive-grade operating range; validated per AEC-Q101 for instrument cluster and airbag deployment use. |
Pinout & Package
SOT-223 (Case 318E, Style 1) surface-mount package with exposed collector tab for thermal conduction; 4-pin configuration with pins 2 and 4 internally connected to collector.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input; requires ≥300 mA drive for full saturation at 3 A load; low VBE(sat) (1.0 V max) minimizes driver power loss. |
| 2 | Collector | Main high-current output path; electrically tied to pin 4; soldered to large copper pour for thermal relief and EMI reduction. |
| 3 | Emitter | Reference node for base drive and load return; must be low-impedance connection to minimize VBE error and switching delay. |
| 4 | Collector | Second collector terminal; redundant connection to same internal node as pin 2 - improves current sharing and thermal spreading across PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VCE(sat) | 0.200 V at full 3 A load - cuts conduction loss by >50% vs. standard general-purpose transistors, directly improving battery runtime in portable devices. |
| AEC-Q101 qualified | Validated for automotive applications including airbag deployment and instrument clusters - ensures reliability under thermal cycling, vibration, and humidity stress. |
| Dual collector terminals | Pins 2 and 4 both connect to collector - doubles thermal interface area and reduces effective RθJA when both are soldered to copper, supporting higher power density layouts. |
| Pb-free, RoHS-compliant | Fully compliant with EU RoHS Directive 2011/65/EU and halogen-free/BFR-free - meets environmental requirements for global consumer and automotive shipments. |
| High hFE linearity | hFE remains stable across IC = 0.01–3.0 A - enables predictable base drive sizing and consistent switching timing in analog amplifier and PWM feedback paths. |
Applications
| DC–DC Buck Converter | Portable Device Power Management |
|---|---|
Use Scenario: Step-down regulation from 5 V or 12 V battery input to 3.3 V or 1.8 V logic rails in smartphones and tablets. IC Role / Device Role / Timing Role: Main switching transistor in synchronous or asynchronous buck topology; handles peak currents up to 3 A during transient load steps. Use Value: 0.200 V VCE(sat) limits conduction loss to 0.6 W at 3 A, reducing thermal load and enabling smaller heat sinks or no heatsink in thin form factors. | Use Scenario: Load switching for USB peripherals, display backlights, or audio amplifiers in battery-powered PDAs and digital cameras. IC Role / Device Role / Timing Role: Low-side power switch controlled directly by PMU GPIO; toggles within microseconds for dynamic power gating. Use Value: High hFE (100 min) allows full saturation with only 300 mA base current - eliminates need for external driver IC and saves board space. |
| Low-Voltage Motor Control | Automotive Instrument Cluster |
Use Scenario: H-bridge half-bridge driver for spindle motors in portable disc drives and tape drives. IC Role / Device Role / Timing Role: High-current quadrant switch handling bidirectional 2–3 A motor current; operates at PWM frequencies up to 200 kHz. Use Value: 215 MHz fT ensures fast turn-on/turn-off with minimal storage time, reducing shoot-through risk and improving motor torque resolution. | Use Scenario: LED backlight dimming and solenoid actuation in automotive dashboard displays and warning indicators. IC Role / Device Role / Timing Role: AEC-Q101-qualified switching element driving 12 V loads from microcontroller GPIO; withstands load dump and reverse battery conditions. Use Value: –55 °C to +150 °C junction range and PPAP capability ensure functional safety compliance without derating in under-hood environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN2012ZTA | Higher VCEO (60 V), lower IC (2.5 A), higher VCE(sat) (0.25 V @ 2.5 A), SOT-223 package. | Preferred for 24 V industrial systems; less suitable for 3–5 V battery rails due to higher saturation loss. | Select ZXTN2012ZTA when higher voltage headroom is required and 3 A continuous current is not needed. |
| MMBT4401LT1G | Lower VCEO (40 V), lower IC (0.6 A), much higher VCE(sat) (0.75 V @ 0.5 A), SOT-23 package. | Targeted at signal-level switching; unsuitable for >1 A loads due to thermal and saturation limitations. | Choose MMBT4401LT1G only for low-power biasing or logic-level translation - not a functional replacement for NSS40301MZ4T3G. |
Compared with ZXTN2012ZTA and MMBT4401LT1G, the NSS40301MZ4T3G uniquely balances 3 A current capability, 0.200 V VCE(sat), and AEC-Q101 qualification in SOT-223 - making it the only option among the three validated for automotive-grade 3 A switching with minimal conduction loss.
Availability
NSS40301MZ4T3G is available at Aetrix Electronics and suitable for DC–DC converters, portable device power management, and low-voltage motor controls requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for NSS40301MZ4T3G 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 delivering energy-efficient power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NSS40301MZ4T3G belongs to the e2PowerEdge family - designed specifically for high-efficiency, low-voltage switching in battery-powered and thermally constrained systems where minimizing VCE(sat) and maximizing hFE are primary design goals.
FAQ
What is the maximum continuous collector current rating for NSS40301MZ4T3G?
The NSS40301MZ4T3G is rated for 3.0 A continuous collector current at TC = 25 °C. Derating is required above this temperature - for example, at TC = 100 °C, the usable IC drops to approximately 1.5 A based on its 2.0 W total power dissipation limit and thermal characteristics.
Is NSS40301MZ4T3G qualified for automotive applications?
Yes, the NSS40301MZ4T3G is AEC-Q101 qualified and PPAP capable. It is explicitly listed in the datasheet as meeting automotive reliability standards and is approved for use in airbag deployment systems and instrument clusters - with full test reports available upon request.
What is the typical VCE(sat) of NSS40301MZ4T3G at full load?
The NSS40301MZ4T3G achieves a typical VCE(sat) of 0.200 V at IC = 3.0 A and IB = 0.3 A. This value is confirmed in the Electrical Characteristics table and supported by Figure 4 in the datasheet, showing consistent performance across temperature and current ranges.
Does NSS40301MZ4T3G have dual collector terminals, and how should they be used?
Yes, the NSS40301MZ4T3G has dual collector terminals (pins 2 and 4), both connected to the same internal collector node. For optimal thermal performance, both pins must be soldered to a common large copper pour - effectively doubling the thermal interface area and reducing effective RθJA by up to 20%.
What package type and marking does NSS40301MZ4T3G use?
The NSS40301MZ4T3G uses the SOT-223 (Case 318E, Style 1) package with Pb-free finish. Its top-side marking is "40301" followed by date code (e.g., "AYW"), and it ships in 4,000-unit tape-and-reel format per the ordering information table in the datasheet.
NSS40301MZ4T3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- 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:
- SOT-223 (TO-261)
NSS40301MZ4T3G FAQ
1.How can I place an order for NSS40301MZ4T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NSS40301MZ4T3G 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 NSS40301MZ4T3G reliable?
The price and inventory of NSS40301MZ4T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NSS40301MZ4T3G is usually 5 days.
3.What payment methods are accepted for NSS40301MZ4T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NSS40301MZ4T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NSS40301MZ4T3G?
NSS40301MZ4T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NSS40301MZ4T3G 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 NSS40301MZ4T3G?
For technical support, including NSS40301MZ4T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NSS40301MZ4T3G requirements.
6.How does Aetrix verify that NSS40301MZ4T3G is sourced from the original manufacturer or authorized distributors?
All NSS40301MZ4T3G 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 NSS40301MZ4T3G meets industry standards.
7.What is the process for return or replacement of NSS40301MZ4T3G?
All NSS40301MZ4T3G units undergo pre-shipment inspection (PSI). If there is an issue with NSS40301MZ4T3G, 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 NSS40301MZ4T3G part is unused and in its original packaging.
Return procedure for NSS40301MZ4T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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