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

Vishay Siliconix IRLZ44PBF

Name: IRLZ44PBF
Brand: Vishay Siliconix
SKU: IRLZ44PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLZ44PBF

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: IRLZ44PBF.pdf

Description:: MOSFET N-CH 60V 50A TO220AB

Quantity:: RFQ Add To RFQ list

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Inventory:8,341

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Product details

Overview

IRLZ44PBF from Vishay Siliconix is a logic-level N-channel power MOSFET in TO-220AB package, rated for 60 V V_DS, 50 A continuous drain current at T_C = 25 °C, and 0.028 Ω R_DS(on) at V_GS = 5 V. It delivers fast switching, rugged avalanche capability (400 mJ), and operates up to 175 °C - widely used in DC motor control, power supplies, and solid-state relay replacements.

For engineers reviewing the IRLZ44PBF datasheet, IRLZ44PBF pinout, IRLZ44PBF application, or IRLZ44PBF equivalent, key selection criteria include gate drive compatibility with 4–5 V logic, thermal performance in high-current switching, body diode recovery behavior (t_rr = 130–180 ns), and TO-220AB mechanical mounting requirements.

Technical Context

This MOSFET uses third-generation planar silicon technology optimized for low R_DS(on) and dynamic dV/dt robustness. Its gate threshold voltage (1.0–2.0 V) enables direct microcontroller drive without level-shifting, while the integrated body diode supports freewheeling in inductive loads.

The device features low gate charge (Q_g = 66 nC) and controlled capacitance profile (C_iss = 3300 pF, C_oss = 1200 pF), supporting efficient hard-switching at frequencies up to several hundred kHz. Thermal resistance R_thJC = 1.0 °C/W ensures effective heat transfer to heatsinks under sustained 50 A conduction.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	60 V - maximum blocking voltage for 48 V bus systems with margin
R_DS(on) @ V_GS = 5 V	0.028 Ω - enables <1.5 W conduction loss at 31 A, simplifying thermal design
Q_g	66 nC - determines gate driver current requirement (~1.3 A peak for 50 ns turn-on)
t_rr	130–180 ns - defines minimum dead time needed to prevent shoot-through in half-bridge topologies
E_AS	400 mJ - supports unclamped inductive switching without external snubbers
T_J max	175 °C - allows operation in sealed enclosures or high ambient industrial environments
I_D continuous @ T_C = 100 °C	36 A - derated current usable in compact heatsink designs with forced air

Pinout & Package

IRLZ44PBF is housed in a through-hole TO-220AB package with standard three-terminal layout: Drain (tab), Gate (lead 1), Source (lead 2). The metal tab is electrically connected to the Drain and must be isolated from heatsink unless circuit topology permits common-drain configuration.

Pin/Terminal	Circuit Role	Design Meaning
Lead 1 (left, viewing front)	Gate	Logic-level input requiring ≤100 nA leakage; sensitive to ESD; routed away from noisy traces
Lead 2 (center)	Source	Reference node for gate drive; carries full load current; connects to ground or low-side return path
Metal tab (back)	Drain	High-current output node; thermally coupled to heatsink; requires insulating washer if isolated mounting

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced at V_GS = 4 V - eliminates need for gate driver ICs in 3.3 V/5 V MCU systems
Ruggedized dV/dt rating	4.5 V/ns - prevents spurious turn-on during high-speed switching in noisy power stages
Fast body diode recovery	t_rr = 130–180 ns with Q_rr = 0.84–1.3 μC - reduces switching losses and EMI in synchronous rectification
High-temperature operation	Rated to 175 °C junction - supports sealed automotive or industrial power modules without derating penalties
Low package thermal resistance	R_thJC = 1.0 °C/W - enables >100 W dissipation with modest heatsinking when mounted properly

Applications

DC Motor Control	Switched-Mode Power Supply
Use Scenario: Bidirectional 24–48 V brushed DC motor drive in robotics and automation. IC Role / Device Role / Timing Role: Low-side switch controlling motor current direction and PWM speed regulation. Use Value: Logic-level gate enables direct STM32 GPIO drive; 50 A rating supports stall currents; fast t_rr minimizes cross-conduction risk in H-bridge freewheeling.	Use Scenario: Secondary-side synchronous rectifier in 48 V telecom PSUs. IC Role / Device Role / Timing Role: Active rectifier replacing Schottky diodes to reduce conduction loss. Use Value: 0.028 Ω R_DS(on) cuts rectifier loss by >60% vs. 40 V Schottky; body diode t_rr aligns with controller dead-time specs.
Solid-State Relay Replacement	Battery Protection Circuit
Use Scenario: High-reliability AC/DC load switching in PLC output modules. IC Role / Device Role / Timing Role: Main power switch isolating 24–60 V DC loads with zero-crossing control. Use Value: Avalanche energy rating (400 mJ) absorbs inductive kickback from solenoids; TO-220AB provides mechanical robustness for industrial vibration.	Use Scenario: Overcurrent and short-circuit protection in 12–48 V Li-ion battery packs. IC Role / Device Role / Timing Role: Primary discharge FET in active protection IC-controlled path. Use Value: Low R_DS(on) minimizes voltage drop across protection FET; 175 °C rating accommodates internal cell heating during fault conditions.

DC Motor Control

Switched-Mode Power Supply

Use Scenario: Bidirectional 24–48 V brushed DC motor drive in robotics and automation.

IC Role / Device Role / Timing Role: Low-side switch controlling motor current direction and PWM speed regulation.

Use Value: Logic-level gate enables direct STM32 GPIO drive; 50 A rating supports stall currents; fast t_rr minimizes cross-conduction risk in H-bridge freewheeling.

Use Scenario: Secondary-side synchronous rectifier in 48 V telecom PSUs.

IC Role / Device Role / Timing Role: Active rectifier replacing Schottky diodes to reduce conduction loss.

Use Value: 0.028 Ω R_DS(on) cuts rectifier loss by >60% vs. 40 V Schottky; body diode t_rr aligns with controller dead-time specs.

Solid-State Relay Replacement

Battery Protection Circuit

Use Scenario: High-reliability AC/DC load switching in PLC output modules.

IC Role / Device Role / Timing Role: Main power switch isolating 24–60 V DC loads with zero-crossing control.

Use Value: Avalanche energy rating (400 mJ) absorbs inductive kickback from solenoids; TO-220AB provides mechanical robustness for industrial vibration.

Use Scenario: Overcurrent and short-circuit protection in 12–48 V Li-ion battery packs.

IC Role / Device Role / Timing Role: Primary discharge FET in active protection IC-controlled path.

Use Value: Low R_DS(on) minimizes voltage drop across protection FET; 175 °C rating accommodates internal cell heating during fault conditions.

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
IRFZ44NPbF	R_DS(on) = 0.028 Ω @ V_GS = 10 V (vs. 0.028 Ω @ 5 V for IRLZ44PBF); higher V_GS(th) (2–4 V)	Requires 10 V gate drive; unsuitable for 3.3 V logic; better for fixed 12 V gate supply systems	Select IRFZ44NPbF only when gate voltage ≥10 V is guaranteed and logic-level drive is unnecessary
STP55NF06L	R_DS(on) = 0.018 Ω @ V_GS = 5 V; higher Q_g (95 nC); TO-220FP package (shorter leads)	Lower conduction loss but slower switching; smaller footprint but reduced creepage for high-voltage isolation	Choose STP55NF06L when lower R_DS(on) outweighs gate drive complexity and thermal mass constraints

Compared with IRFZ44NPbF and STP55NF06L, the IRLZ44PBF uniquely balances logic-level compatibility, proven avalanche ruggedness, and TO-220AB mechanical reliability - making it optimal for cost-sensitive, thermally constrained, and microcontroller-driven power switching where gate voltage headroom is limited.

Availability

IRLZ44PBF is available at Aetrix Electronics and suitable for DC motor control, switched-mode power supplies, solid-state relay replacement, and battery protection circuits requiring stable component supply and long-term industrial availability.

Supply support for IRLZ44PBF 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 MOSFETs, diodes, and optoelectronics with emphasis on reliability, ruggedness, and application-specific optimization.

The IRLZ44PBF belongs to Vishay's logic-level power MOSFET product line, engineered for direct interface with low-voltage digital controllers in industrial power conversion, motor drives, and energy-efficient switching applications.

FAQ

What is the gate threshold voltage range for IRLZ44PBF?

The IRLZ44PBF has a gate-source threshold voltage (V_GS(th)) of 1.0 V to 2.0 V at T_J = 25 °C and I_D = 250 μA. This low threshold enables full enhancement with 3.3 V or 5 V logic signals, eliminating the need for gate voltage boosting. The IRLZ44PBF maintains reliable turn-on even at elevated temperatures due to its positive V_DS temperature coefficient.

Can IRLZ44PBF be used in avalanche mode, and what is its rated energy?

Yes, the IRLZ44PBF is rated for repetitive unclamped inductive switching with a single-pulse avalanche energy (E_AS) of 400 mJ under specified test conditions (V_DD = 25 V, I_AS = 51 A). This ruggedness allows safe operation in flyback converters, relay drivers, and motor commutation without external snubbers - a key differentiator versus standard MOSFETs not characterized for avalanche.

What is the maximum continuous drain current for IRLZ44PBF at 100 °C case temperature?

The IRLZ44PBF supports 36 A continuous drain current at T_C = 100 °C, as specified in its Absolute Maximum Ratings table. This derating reflects thermal limits of the TO-220AB package and ensures safe operation with standard heatsinking. At T_C = 25 °C, the rating is 50 A - both values are limited by package construction, not die capability (which supports 51 A).

Does IRLZ44PBF have a built-in body diode, and what are its key parameters?

Yes, the IRLZ44PBF integrates a monolithic body diode with forward current rating of 50 A continuous and 200 A pulsed. Key parameters include V_SD = 2.5 V at I_S = 51 A and T_J = 25 °C, reverse recovery time t_rr = 130–180 ns, and Q_rr = 0.84–1.3 μC. These values enable use in freewheeling and synchronous rectification where fast, low-loss diode recovery is critical.

Is IRLZ44PBF RoHS-compliant and halogen-free?

The IRLZ44PBF is RoHS-compliant and lead (Pb)-free, as confirmed by Vishay's ordering information. The variant IRLZ44PbF-BE3 adds halogen-free qualification. Both meet JEDEC J-STD-609 Category 1 moisture sensitivity and comply with Vishay's material categorization per document 99912 - making IRLZ44PBF suitable for environmentally regulated industrial and consumer applications.

IRLZ44PBF Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 60 V

Current - Continuous Drain (Id) @ 25°C:: 50A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4V, 5V

Rds On (Max) @ Id, Vgs:: 28mOhm @ 31A, 5V

Vgs(th) (Max) @ Id:: 2V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 66 nC @ 5 V

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 3300 pF @ 25 V

FET Feature:: -

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

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

IRLZ44PBF FAQ

1.How can I place an order for IRLZ44PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLZ44PBF 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 IRLZ44PBF reliable?

The price and inventory of IRLZ44PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLZ44PBF is usually 5 days.

3.What payment methods are accepted for IRLZ44PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLZ44PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLZ44PBF?

IRLZ44PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLZ44PBF 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 IRLZ44PBF?

For technical support, including IRLZ44PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLZ44PBF requirements.

6.How does Aetrix verify that IRLZ44PBF is sourced from the original manufacturer or authorized distributors?

All IRLZ44PBF 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 IRLZ44PBF meets industry standards.

7.What is the process for return or replacement of IRLZ44PBF?

All IRLZ44PBF units undergo pre-shipment inspection (PSI). If there is an issue with IRLZ44PBF, 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 IRLZ44PBF part is unused and in its original packaging.

Return procedure for IRLZ44PBF:

1.Submit a request within 90 days.

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

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