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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

STMicroelectronics STD2NC45-1

Name: STD2NC45-1
Brand: STMicroelectronics
SKU: STD2NC45-1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STD2NC45-1

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: STD2NC45-1.pdf

Description:: MOSFET N-CH 450V 1.5A IPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STD2NC45-1 from STMicroelectronics is an N-channel SuperMESH™ Power MOSFET rated for 450 V drain-source voltage, 4.1 Ω R_DS(on) at V_GS = 10 V, and 1.5 A continuous drain current at T_C = 25°C. It features 100% avalanche testing, minimized gate charge (7 nC), and high dv/dt capability (3 V/ns), enabling robust switching in offline SMPS and AC-DC adapters.

For engineers reviewing the STD2NC45-1 datasheet, STD2NC45-1 pinout, STD2NC45-1 application, or STD2NC45-1 equivalent, key selection criteria include its IPAK package thermal resistance (R_thj-case = 4.1 °C/W), unclamped inductive avalanche rating (E_AS = 25 mJ), and diode recovery performance (t_rr = 225 ns, Q_rr = 530 µC) in flyback and resonant converters.

Technical Context

This device employs ST's optimized strip-based PowerMESH™ layout to achieve low on-resistance while preserving high-voltage ruggedness. Its SuperMESH™ architecture delivers enhanced dv/dt immunity (3 V/ns) and reduced gate charge versus prior-generation high-voltage MOSFETs, supporting fast, reliable switching in hard-switched topologies.

The integrated source-drain diode exhibits t_rr = 225 ns and Q_rr = 530 µC under V_DD = 100 V, I_SD = 1.5 A, di/dt = 100 A/µs conditions at T_j = 150°C - critical for minimizing switching losses and EMI in discontinuous conduction mode (DCM) flyback designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	450 V - supports universal-input (85–265 V_AC) offline converters with margin against line surges
R_DS(on)	4.1 Ω max at V_GS = 10 V - determines conduction loss in primary-side switching stage
Q_g	7 nC - enables efficient gate drive with low-power controllers and reduces switching loss
E_AS	25 mJ - ensures single-pulse avalanche survivability during overvoltage transients
t_rr	225 ns - limits reverse recovery energy dissipation and voltage overshoot in flyback snubbers
R_thj-case	4.1 °C/W - allows 30 W power dissipation at T_C = 25°C with modest heatsinking
dv/dt	3 V/ns - sustains noise-immune operation in high-dV/dt environments without false turn-on

Pinout & Package

STD2NC45-1 is housed in the IPAK (TO-251) package: a 3-pin, single-ended, surface-mount variant of the TO-220 outline with isolated tab. The molded plastic body provides creepage/clearance compliance for reinforced insulation in AC-DC applications.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control input	Receives PWM signal; low Q_g (7 nC) minimizes driver power and propagation delay
2 (Drain)	High-side switch node	Connected to bulk capacitor or transformer primary; rated for 450 V blocking
3 (Source)	Power return / reference	Serves as local ground for gate drive; ties to PCB ground plane for thermal and EMI control

Key Features

Feature	Design Value
100% avalanche tested	Guarantees single-pulse E_AS = 25 mJ at T_j = 25°C - eliminates screening failures in surge-prone inputs
Extremely high dv/dt capability	3 V/ns rating prevents spurious turn-on during fast voltage transients in high-frequency SMPS
Minimized gate charge	Q_g = 7 nC reduces gate driver stress and switching loss vs. legacy 450 V MOSFETs
SuperMESH™ optimized layout	Delivers 4.1 Ω R_DS(on) at 450 V - improves efficiency over standard PowerMESH™ counterparts

Applications

Offline AC-DC Adapters

Flyback Converters

Use Scenario: Universal-input (85–265 V_AC) 12–24 W wall adapters powering consumer electronics.

IC Role / Device Role / Timing Role: Primary-side N-channel switching transistor in DCM flyback topology, operating at 65–100 kHz.

Use Value: 450 V rating accommodates 385 V DC link with safety margin; 225 ns t_rr suppresses voltage spikes during diode commutation.

Use Scenario: Isolated 5–19 V output supplies for industrial sensors and IoT gateways.

IC Role / Device Role / Timing Role: Main power switch in quasi-resonant (QR) flyback controller IC reference designs.

Use Value: Low Q_g (7 nC) enables clean zero-voltage switching (ZVS) transitions; 25 mJ E_AS handles leakage inductance energy.

LED Driver Ballasts

Industrial Power Supplies

Use Scenario: Constant-current LED drivers for street lighting using buck-boost or SEPIC topologies.

IC Role / Device Role / Timing Role: High-side switch controlling energy transfer into LED string via inductor charging phase.

Use Value: 4.1 Ω R_DS(on) limits conduction loss at 1.5 A peak; 150°C T_j rating supports sealed enclosure operation.

Use Scenario: 24 V/48 V auxiliary supplies in PLCs and motor drives requiring long-term reliability.

IC Role / Device Role / Timing Role: Input-stage switch in dual-switch forward or half-bridge configurations.

Use Value: 100% avalanche test ensures survival during bus fault events; IPAK package simplifies thermal management on dense PCBs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP2NC45	TO-220 package; identical electrical specs but higher R_thj-case (3.3 °C/W) and larger footprint	Better suited for through-hole prototyping or higher-power derating (>30 W)	Select when board space permits and thermal interface to heatsink is superior
IPP60R190C6	600 V, 190 mΩ, CoolMOS™ P6 - lower R_DS(on) but higher Q_g (23 nC) and cost	Targeted at high-efficiency 65+ W adapters where conduction loss dominates	Choose only if system-level efficiency gain justifies gate drive redesign and BOM cost increase

Compared with STP2NC45 and IPP60R190C6, STD2NC45-1 offers optimal balance of compact IPAK packaging, proven avalanche ruggedness, and gate drive simplicity for sub-30 W offline converters - avoiding trade-offs in thermal density or driver complexity.

Availability

STD2NC45-1 is available at Aetrix Electronics and suitable for offline AC-DC adapters, flyback converters, and LED driver ballasts requiring stable component supply across extended production lifecycles.

Supply support for STD2NC45-1 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

STD2NC45-1 belongs to ST's SuperMESH™ high-voltage Power MOSFET product line, engineered specifically for efficiency and ruggedness in cost-sensitive, space-constrained offline switching power supplies.

FAQ

Is STD2NC45-1 suitable for use in 230 V_AC mains-powered applications?

Yes. With a 450 V V_DS rating and 100% avalanche testing, STD2NC45-1 supports universal-input (85–265 V_AC) designs. Its 385 V DC link voltage plus safety margin meets IEC 61000-4-5 surge requirements when paired with appropriate input filtering and clamping.

What is the maximum continuous drain current at 100°C case temperature?

The datasheet specifies I_D = 0.95 A at T_C = 100°C. This derated value accounts for thermal limitations of the IPAK package (R_thj-case = 4.1 °C/W) and ensures safe operation without exceeding T_j = 150°C under steady-state conditions.

Does STD2NC45-1 have a built-in body diode, and what are its recovery characteristics?

Yes, it integrates a source-drain diode with t_rr = 225 ns, Q_rr = 530 µC, and I_RRM = 4.7 A at T_j = 150°C. These values are measured under standardized conditions (V_DD = 100 V, di/dt = 100 A/µs) and directly impact snubber design and EMI in flyback converters.

Can STD2NC45-1 be used as a direct replacement for STD2NK45Z in existing designs?

No. STD2NK45Z is a 450 V, 1.5 A Zener-protected SuperFET with different gate threshold (2.5–4.5 V) and dynamic characteristics. STD2NC45-1 lacks integrated Zener protection and has distinct Q_g (7 nC vs. 12 nC) and C_oss (27.5 pF), requiring gate drive and layout revalidation.

STD2NC45-1 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: SuperMESH™

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 450 V

Current - Continuous Drain (Id) @ 25°C:: 1.5A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 10V

Rds On (Max) @ Id, Vgs:: 4.5Ohm @ 500mA, 10V

Vgs(th) (Max) @ Id:: 3.7V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 7 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 160 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 30W (Tc)

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-251 (IPAK)

STD2NC45-1 FAQ

1.How can I place an order for STD2NC45-1 through Aetrix?

Please submit a Request for Quotation (RFQ) for STD2NC45-1 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 STD2NC45-1 reliable?

The price and inventory of STD2NC45-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STD2NC45-1 is usually 5 days.

3.What payment methods are accepted for STD2NC45-1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STD2NC45-1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STD2NC45-1?

STD2NC45-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STD2NC45-1 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 STD2NC45-1?

For technical support, including STD2NC45-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STD2NC45-1 requirements.

6.How does Aetrix verify that STD2NC45-1 is sourced from the original manufacturer or authorized distributors?

All STD2NC45-1 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 STD2NC45-1 meets industry standards.

7.What is the process for return or replacement of STD2NC45-1?

All STD2NC45-1 units undergo pre-shipment inspection (PSI). If there is an issue with STD2NC45-1, 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 STD2NC45-1 part is unused and in its original packaging.

Return procedure for STD2NC45-1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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