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

STMicroelectronics STD12N65M2

Name: STD12N65M2
Brand: STMicroelectronics
SKU: STD12N65M2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STD12N65M2

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: STD12N65M2.pdf

Description:: MOSFET N-CH 650V 8A DPAK

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Product details

Overview

STD12N65M2 from STMicroelectronics is an N-channel 650 V, 420 mΩ typ. (500 mΩ max), 8 A MDmesh M2 Power MOSFET in DPAK (TO-252) package, optimized for high-efficiency hard-switching and resonant converters in industrial SMPS, PFC stages, and auxiliary power supplies.

For engineers reviewing the STD12N65M2 datasheet, STD12N65M2 pinout, STD12N65M2 application, or STD12N65M2 equivalent, key selection criteria include its 16.5 nC total gate charge, 144 pF Coss_eq (0–520 V), 100% avalanche-tested ruggedness, Zener-protected gate, and 15 V/ns diode recovery dv/dt rating under ISD ≤ 8 A conditions.

Technical Context

This device employs ST's MDmesh M2 strip-based vertical structure to achieve low RDS(on) and minimized output capacitance nonlinearity-enabling reduced switching losses and improved light-load efficiency in continuous conduction mode (CCM) PFC and LLC resonant topologies.

Its gate threshold voltage (2–4 V) and 7 Ω intrinsic gate resistance support robust drive compatibility with standard 10 V gate drivers, while the integrated body diode features 313 ns trr (TJ = 25 °C) and 2.7 µC Qrr-critical for minimizing commutation losses in bridge-leg configurations.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	650 V - supports 400 V DC bus designs with ≥30% voltage margin for surge and ringing
R_DS(on) max	500 mΩ at V_GS = 10 V, I_D = 4 A - enables <1.6 W conduction loss at 8 A continuous drain current
Q_g	16.5 nC - determines gate drive power requirement and switching speed control in 100–300 kHz converters
C_{oss_eq}	144 pF (0–520 V) - defines stored energy (E = ½·C·V²) impacting turn-off loss and snubber design
E_AS	250 mJ - quantifies unclamped inductive switching robustness without external clamping
dv/dt ruggedness	50 V/ns - ensures reliable operation during fast voltage transients in high-side switch configurations
T_J max	150 °C - sets thermal derating boundary for PCB layout and heatsink sizing in sealed enclosures

Pinout & Package

STD12N65M2 uses the DPAK (TO-252) surface-mount package with exposed drain tab for enhanced thermal dissipation. The case-to-ambient thermal resistance is 50 °C/W on 1 in² FR-4/2 oz Cu, and junction-to-case resistance is 1.47 °C/W-enabling direct heatsink mounting via the tab.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Control terminal; requires ≤±25 V drive; 7 Ω intrinsic resistance affects gate loop damping
2 (TAB/D)	Drain (exposed tab)	Main high-voltage power terminal; electrically connected to package tab-must be isolated from heatsink unless referenced to same potential
3 (S)	Source	Power return and gate reference node; critical for low-inductance Kelvin source routing in high-di/dt applications

Key Features

Feature	Design Value
MDmesh M2 strip layout	Reduces specific on-resistance by ~25% vs. first-gen MDmesh, enabling smaller die size without sacrificing ruggedness
Zener-protected gate	Integrates gate-source clamp diode rated for ±25 V-eliminates need for external TVS in most gate-drive circuits
100% avalanche tested	Each unit validated for single-pulse EAS = 250 mJ-ensures production-level reliability in unclamped inductive switching
Optimized C_oss profile	C_oss = 25 pF at 100 V, rising to 144 pF equivalent up to 520 V-minimizes energy loss during zero-voltage switching transitions
Low Q_gd/Q_g ratio	8.5 nC / 16.5 nC ≈ 0.51-improves Miller immunity and enables stable operation with moderate gate resistance (4.7–10 Ω)

Applications

Industrial AC-DC Power Supplies

Server & Telecom Rectifiers

Use Scenario: Active clamp forward or LLC resonant converter primary-side switch in 500–2000 W telecom rectifiers.

IC Role / Device Role / Timing Role: High-voltage switching element handling 400 V DC bus, operating at 150–300 kHz with ZVS capability.

Use Value: 144 pF C_{oss_eq} and 16.5 nC Q_g enable efficient soft-switching with minimal dead-time sensitivity and reduced snubber losses.

Use Scenario: Boost PFC stage in redundant 1U server power supplies with universal AC input (90–264 VAC).

IC Role / Device Role / Timing Role: Continuous conduction mode (CCM) boost switch subjected to 650 V blocking stress and 8 A peak current.

Use Value: 500 mΩ R_DS(on) and 150 °C T_J rating sustain full-load efficiency >96% while maintaining thermal headroom on compact PCBs.

Motor Drive Inverter Stages

Photovoltaic Inverters

Use Scenario: Low-side switch in 3-phase IGBT/MOSFET inverter modules for HVAC compressors and industrial pumps.

IC Role / Device Role / Timing Role: Fast-switching, avalanche-rugged device managing regenerative braking energy and short-circuit events.

Use Value: 250 mJ E_AS and 50 V/ns dv/dt ruggedness ensure fault tolerance during motor phase reversal and load dump transients.

Use Scenario: DC-DC optimizer or string-level MPPT converter in residential solar microinverters.

IC Role / Device Role / Timing Role: Synchronous rectifier or high-side switch in non-isolated buck-boost topology interfacing 60–1000 V PV strings.

Use Value: Zener-protected gate and 1 µA I_DSS at 650 V enable long-term reliability in outdoor, high-humidity environments with minimal gate-drive overhead.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP12N65M2	Same silicon, TO-220 through-hole package; R_DS(on) identical; no exposed tab for heatsinking	Suitable for prototyping or lower-power lab supplies where manual soldering and airflow cooling are feasible	Select when mechanical mounting constraints preclude surface-mount DPAK or when higher thermal mass is needed for intermittent duty cycles
IPP65R520CFD7	650 V, 520 mΩ, 7 A; CoolMOS CFD7 technology; lower Q_g (13.5 nC) but higher C_oss (220 pF)	Better for ZVS-dominant topologies requiring ultra-low gate charge, but less optimal for hard-switched PFC due to higher stored energy	Prefer when operating frequency exceeds 350 kHz and gate drive strength is limited; avoid in high-di/dt PFC where C_{oss_eq} linearity matters

Compared with STP12N65M2, STD12N65M2 offers superior thermal performance in space-constrained layouts via DPAK tab mounting; versus IPP65R520CFD7, it delivers lower C_{oss_eq}-based turn-off loss and proven avalanche margin at the cost of slightly higher Q_g, making it more suitable for industrial PFC and medium-frequency SMPS.

Availability

STD12N65M2 is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, server & telecom rectifiers, and photovoltaic inverters requiring stable component supply, long-lifecycle assurance, and traceable sourcing from STMicroelectronics' qualified wafer fab and assembly sites.

Supply support for STD12N65M2 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, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

STD12N65M2 belongs to ST's MDmesh M2 high-voltage Power MOSFET product line, engineered specifically for high-efficiency, high-reliability switching in industrial power conversion systems operating up to 650 V.

FAQ

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

The maximum continuous drain current for STD12N65M2 is 5 A at TC = 100 °C, as specified in Table 1 (Absolute Maximum Ratings). This derating reflects thermal limits of the DPAK package and must be respected in thermally constrained layouts-even if ambient temperature is lower-since junction temperature depends on actual power dissipation and heatsinking.

Does STD12N65M2 include integrated gate protection?

Yes, STD12N65M2 integrates a Zener diode between gate and source, rated for ±25 V, providing inherent protection against gate oxide breakdown from ESD or gate-drive overshoot. This eliminates the need for external gate-protection components in most standard driver configurations, though a series gate resistor (≥4.7 Ω) is still required for oscillation damping.

How is avalanche ruggedness verified for this part?

Every STD12N65M2 unit undergoes 100% production avalanche testing per JEDEC JESD24-11, applying single-pulse unclamped inductive switching at I_AR = 1.6 A and V_DD = 50 V to deliver E_AS = 250 mJ. Test conditions ensure junction temperature remains below 150 °C, validating robustness for real-world overvoltage and short-circuit events without degradation.

Can STD12N65M2 be used in synchronous rectification topologies?

No-STD12N65M2 is an N-channel high-side or low-side switch, not a dedicated synchronous rectifier. Its body diode has 313 ns trr and 2.7 µC Qrr at 25 °C, which is too slow and lossy for high-frequency SR operation. For synchronous rectification, ST recommends dedicated low-V_F, low-Qrr devices like STP16LF60 or SRK1001-controlled MOSFETs with optimized diode characteristics.

STD12N65M2 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: MDmesh™ M2

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 650 V

Current - Continuous Drain (Id) @ 25°C:: 8A (Tc)

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

Rds On (Max) @ Id, Vgs:: 500mOhm @ 4A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 16.5 nC @ 10 V

Vgs (Max):: ±25V

Input Capacitance (Ciss) (Max) @ Vds:: 535 pF @ 100 V

FET Feature:: -

Power Dissipation (Max):: 85W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

STD12N65M2 FAQ

1.How can I place an order for STD12N65M2 through Aetrix?

Please submit a Request for Quotation (RFQ) for STD12N65M2 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 STD12N65M2 reliable?

The price and inventory of STD12N65M2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STD12N65M2 is usually 5 days.

3.What payment methods are accepted for STD12N65M2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STD12N65M2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STD12N65M2?

STD12N65M2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STD12N65M2 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 STD12N65M2?

For technical support, including STD12N65M2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STD12N65M2 requirements.

6.How does Aetrix verify that STD12N65M2 is sourced from the original manufacturer or authorized distributors?

All STD12N65M2 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 STD12N65M2 meets industry standards.

7.What is the process for return or replacement of STD12N65M2?

All STD12N65M2 units undergo pre-shipment inspection (PSI). If there is an issue with STD12N65M2, 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 STD12N65M2 part is unused and in its original packaging.

Return procedure for STD12N65M2:

1.Submit a request within 90 days.

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

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