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

Vishay Siliconix IRF644NSTRLPBF

Name: IRF644NSTRLPBF
Brand: Vishay Siliconix
SKU: IRF644NSTRLPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRF644NSTRLPBF

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: IRF644NSTRLPBF.pdf

Description:: MOSFET N-CH 250V 14A D2PAK

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Product details

Overview

IRF644NSTRLPBF from Vishay Siliconix is a 250 V, 14 A N-channel power MOSFET in D2PAK (TO-263) package, featuring 0.240 Ω R_DS(on) at V_GS = 10 V, 54 nC total gate charge, and 175 °C maximum junction temperature. It delivers rugged avalanche capability (180 mJ single-pulse), fast switching (10 ns turn-on delay), and is optimized for high-current DC-DC converters and motor drive half-bridges.

For engineers reviewing the IRF644NSTRLPBF datasheet, IRF644NSTRLPBF pinout, IRF644NSTRLPBF application, or IRF644NSTRLPBF equivalent, key selection criteria include its TO-263 thermal performance (R_thJC = 1.0 °C/W), dV/dt rating (7.9 V/ns), and lead-free RoHS-compliant construction - critical for industrial power supply and automotive auxiliary load switching designs.

Technical Context

This MOSFET employs Vishay's fifth-generation silicon process to achieve low on-resistance per die area while maintaining robust unclamped inductive switching capability. Its gate threshold voltage (2.0–4.0 V) and transconductance (8.8 S typical) support direct TTL/CMOS drive with minimal external buffering.

The device integrates a fast-recovery body diode (t_rr = 165–250 ns, Q_rr = 1.0–1.6 µC) and exhibits stable dynamic parameters across temperature: C_iss = 1060 pF, C_oss = 140 pF, and C_rss = 38 pF at V_DS = 25 V - enabling predictable snubber design in hard-switched topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	250 V - supports 200 V bus designs with 25 % margin against transients
R_DS(on)	0.240 Ω @ V_GS = 10 V - enables ≤3.4 W conduction loss at 12 A continuous drain current
Q_g	54 nC - determines gate driver power requirement and switching speed in 100–500 kHz SMPS
I_D (T_C = 100 °C)	9.9 A - defines usable current in thermally constrained PCB-mount applications
E_AS	180 mJ - allows safe operation under unclamped inductive load switching without external clamping
t_r/t_f	21 ns / 17 ns - minimizes switching losses in high-frequency synchronous rectifiers
T_J max	175 °C - permits operation in sealed enclosures or high-ambient industrial environments

Pinout & Package

D2PAK (TO-263) surface-mount package with exposed drain pad for low thermal resistance (R_thJC = 1.0 °C/W) and high-power dissipation up to 2.0 W on standard FR-4 PCBs.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control electrode	Accepts 0–10 V logic-level drive; 9.2 nC Q_gs ensures rapid turn-on with low gate resistance
D (Drain)	High-side power terminal	Connected to exposed copper pad on bottom of D2PAK; primary heat path to heatsink or PCB plane
S (Source)	Reference and return path	Provides Kelvin sense point for current monitoring; internal source inductance (L_S = 7.5 nH) affects diode recovery behavior

Key Features

Feature	Design Value
Fully avalanche rated	180 mJ single-pulse energy handling eliminates need for external avalanche clamps in motor drive flyback
Dynamic dV/dt rating	7.9 V/ns immunity prevents spurious turn-on during high-slew-rate bus transients in industrial inverters
Lead (Pb)-free RoHS compliant	Meets EU Directive 2011/65/EU; SnAgCu solder compatible with standard reflow profiles (peak 260 °C)
Low Q_gd/Q_g ratio	26/54 = 48 % - improves Miller immunity and enables stable operation with high-side gate drivers
Fast body diode recovery	t_rr = 165 ns (typ.) - reduces cross-conduction losses in synchronous buck converters operating >200 kHz

Applications

Industrial DC-DC Converters	Automotive Auxiliary Loads
Use Scenario: 24 V input, 5–12 V output isolated forward converter delivering 15 A at 300 kHz. IC Role / Device Role / Timing Role: Primary-side switching MOSFET in active clamp forward topology. Use Value: 0.240 Ω R_DS(on) limits conduction loss to 4.3 W at full load; 175 °C rating sustains operation in sealed control cabinet.	Use Scenario: 12 V battery-fed seat heater or window lift driver with PWM duty cycling. IC Role / Device Role / Timing Role: High-side load switch controlling resistive heating element. Use Value: Avalanche rating absorbs inductive kickback from relay coils; TO-263 footprint enables compact layout with integrated thermal pad.
Motor Drive Half-Bridges	UPS Inverter Stages
Use Scenario: 48 V BLDC motor controller using six-pack IGBT/MOSFET modules. IC Role / Device Role / Timing Role: Low-side switch in three-phase bridge leg with bootstrap gate drive. Use Value: 54 nC Q_g allows clean 100 ns turn-off using 10 Ω gate resistor; dV/dt immunity prevents false triggering during phase commutation.	Use Scenario: Online double-conversion UPS with 200 V DC link feeding 230 V AC output via H-bridge. IC Role / Device Role / Timing Role: Output stage switching device in full-bridge inverter. Use Value: 250 V V_DS provides 20 % margin over 200 V rail; 180 mJ E_AS handles short-circuit fault energy without failure.

Industrial DC-DC Converters

Automotive Auxiliary Loads

Use Scenario: 24 V input, 5–12 V output isolated forward converter delivering 15 A at 300 kHz.

IC Role / Device Role / Timing Role: Primary-side switching MOSFET in active clamp forward topology.

Use Value: 0.240 Ω R_DS(on) limits conduction loss to 4.3 W at full load; 175 °C rating sustains operation in sealed control cabinet.

Use Scenario: 12 V battery-fed seat heater or window lift driver with PWM duty cycling.

IC Role / Device Role / Timing Role: High-side load switch controlling resistive heating element.

Use Value: Avalanche rating absorbs inductive kickback from relay coils; TO-263 footprint enables compact layout with integrated thermal pad.

Motor Drive Half-Bridges

UPS Inverter Stages

Use Scenario: 48 V BLDC motor controller using six-pack IGBT/MOSFET modules.

IC Role / Device Role / Timing Role: Low-side switch in three-phase bridge leg with bootstrap gate drive.

Use Value: 54 nC Q_g allows clean 100 ns turn-off using 10 Ω gate resistor; dV/dt immunity prevents false triggering during phase commutation.

Use Scenario: Online double-conversion UPS with 200 V DC link feeding 230 V AC output via H-bridge.

IC Role / Device Role / Timing Role: Output stage switching device in full-bridge inverter.

Use Value: 250 V V_DS provides 20 % margin over 200 V rail; 180 mJ E_AS handles short-circuit fault energy without failure.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP20NM50FP	500 V V_DS, 0.23 Ω R_DS(on), TO-220FP package, lower Q_g (36 nC)	Higher voltage rating suits 400 V PFC stages; smaller gate charge eases drive in space-constrained designs	Prefer when higher voltage margin or lower drive power is required; not drop-in due to different package and pinout
IXTP12N50D2	500 V V_DS, 0.55 Ω R_DS(on), TO-220 package, ultra-low Q_rr (0.25 µC)	Optimized for high-voltage, low-diode-recovery-loss applications like resonant LLC secondaries	Choose when minimizing body diode reverse recovery loss is critical; trade-off is higher conduction loss

Compared with STP20NM50FP and IXTP12N50D2, the IRF644NSTRLPBF offers superior thermal performance in surface-mount form (R_thJC = 1.0 °C/W vs. ≥1.5 °C/W for TO-220 variants) and higher avalanche energy tolerance - making it preferred for high-reliability, high-current, PCB-mounted power stages where thermal management dominates.

Availability

IRF644NSTRLPBF is available at Aetrix Electronics and suitable for industrial DC-DC converters, automotive auxiliary load switches, and motor drive half-bridges requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for IRF644NSTRLPBF 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

Vishay Siliconix is a global leader in discrete semiconductors, specializing in high-reliability power MOSFETs, diodes, and optoelectronics for industrial, automotive, and computing markets.

The IRF644NSTRLPBF belongs to Vishay's fifth-generation Power MOSFET family, engineered for high-current, high-temperature switching in power conversion systems where ruggedness, low R_DS(on), and repeatable avalanche performance are essential.

FAQ

What is the maximum continuous drain current for IRF644NSTRLPBF at 100 °C case temperature?

The IRF644NSTRLPBF supports 9.9 A continuous drain current at T_C = 100 °C, as specified in the Absolute Maximum Ratings table. This value reflects thermal derating from the 14 A rating at 25 °C and is validated for sustained operation with proper heatsinking or PCB copper area in the D2PAK package.

Does IRF644NSTRLPBF have a fully rated avalanche capability, and what is the energy limit?

Yes, the IRF644NSTRLPBF is fully avalanche rated with a single-pulse avalanche energy (E_AS) of 180 mJ, tested under defined conditions (L = 5.0 µH, I_AS = 8.4 A, T_J starting at 25 °C). This rating is confirmed in the datasheet's Absolute Maximum Ratings section and enables reliable operation in inductive switching circuits without external clamping.

What is the gate threshold voltage range for IRF644NSTRLPBF, and how does it affect drive requirements?

The IRF644NSTRLPBF has a gate threshold voltage (V_GS(th)) range of 2.0 V to 4.0 V at I_D = 250 µA. This allows compatibility with standard 5 V and 10 V logic-level gate drivers, but full enhancement requires V_GS ≥ 10 V to achieve the specified 0.240 Ω R_DS(on). The IRF644NSTRLPBF is not a logic-level MOSFET and requires adequate gate drive voltage to minimize conduction losses.

Is IRF644NSTRLPBF RoHS compliant, and what does the 'PbF' suffix indicate?

Yes, IRF644NSTRLPBF is RoHS compliant. The 'PbF' suffix explicitly denotes lead-free terminations meeting EU Directive 2011/65/EU. The device uses SnAgCu solder-compatible plating and is qualified for standard lead-free reflow profiles with peak temperatures up to 260 °C, as documented in Vishay's packaging specifications.

What is the typical reverse recovery time (t_rr) of the body diode in IRF644NSTRLPBF?

The body diode of the IRF644NSTRLPBF has a typical reverse recovery time (t_rr) of 165 ns, measured at T_J = 25 °C, I_F = 14 A, and dI/dt = 100 A/µs. This parameter is critical for synchronous rectification and half-bridge operation, and the datasheet specifies a maximum t_rr of 250 ns under the same conditions.

IRF644NSTRLPBF Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 250 V

Current - Continuous Drain (Id) @ 25°C:: 14A (Tc)

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

Rds On (Max) @ Id, Vgs:: 240mOhm @ 8.4A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 54 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1060 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 150W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263 (D2PAK)

IRF644NSTRLPBF FAQ

1.How can I place an order for IRF644NSTRLPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRF644NSTRLPBF 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 IRF644NSTRLPBF reliable?

The price and inventory of IRF644NSTRLPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRF644NSTRLPBF is usually 5 days.

3.What payment methods are accepted for IRF644NSTRLPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRF644NSTRLPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRF644NSTRLPBF?

IRF644NSTRLPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRF644NSTRLPBF 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 IRF644NSTRLPBF?

For technical support, including IRF644NSTRLPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRF644NSTRLPBF requirements.

6.How does Aetrix verify that IRF644NSTRLPBF is sourced from the original manufacturer or authorized distributors?

All IRF644NSTRLPBF 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 IRF644NSTRLPBF meets industry standards.

7.What is the process for return or replacement of IRF644NSTRLPBF?

All IRF644NSTRLPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRF644NSTRLPBF, 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 IRF644NSTRLPBF part is unused and in its original packaging.

Return procedure for IRF644NSTRLPBF:

1.Submit a request within 90 days.

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

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