Vishay Siliconix IRF520STRR

Overview

IRF520STRR from Vishay Siliconix is a surface-mount N-channel enhancement-mode Power MOSFET in D2PAK (TO-263) package, rated for 100 V drain-source voltage, 9.2 A continuous drain current at T_C = 25 °C, and 0.27 Ω R_DS(on) at V_GS = 10 V. It supports fast switching, repetitive avalanche operation, and 175 °C junction temperature - commonly used in DC-DC converters, motor drivers, and power supply high-side switches.

For engineers reviewing the IRF520STRR datasheet, IRF520STRR pinout, IRF520STRR application, or IRF520STRR equivalent, key selection criteria include its 100 V rating, 9.2 A thermal-limited current, 16 nC total gate charge, D2PAK thermal performance (R_thJC = 2.5 °C/W), and body diode recovery time (t_rr = 110–260 ns).

Technical Context

This MOSFET employs third-generation silicon process technology optimized for low R_DS(on) and rugged unclamped inductive switching. Its dynamic dV/dt rating of 5.5 V/ns and 200 mJ single-pulse avalanche energy support reliable operation in inductive load switching circuits without external snubbers.

The device features a monolithic N-channel structure with integrated body diode, specified for 9.2 A continuous source-drain diode conduction and 1.8 V forward voltage at 9.2 A. Gate threshold voltage ranges from 2.0 V to 4.0 V, enabling compatibility with standard 5 V and 10 V logic-level gate drivers.

Key Specifications

Pinout & Package

D2PAK (TO-263) surface-mount package with exposed drain pad for thermal conduction and mechanical anchoring. Dimensions per JEDEC TO-263AB outline: 10.67 mm × 9.65 mm × 4.83 mm (L × W × H); drain tab occupies full rear surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP10NK100ZFP and IRFZ44NPBF, the IRF520STRR uniquely balances 100 V capability, moderate R_DS(on), D2PAK thermal performance, and cost-effective surface-mount assembly - making it a targeted choice for mid-voltage industrial power stages where voltage margin and board space are constrained.

Availability

IRF520STRR is available at Aetrix Electronics and suitable for DC-DC converters, motor drivers, and LED drivers requiring stable component supply across industrial OEM production cycles.

Supply support for IRF520STRR 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 power MOSFETs, diodes, and optoelectronics with emphasis on ruggedness, thermal performance, and reliability.

The IRF520STRR belongs to Vishay's third-generation Power MOSFET family, engineered for high-current, high-reliability switching in industrial power conversion and motor control applications.

FAQ

What is the maximum continuous drain current for IRF520STRR at 100 °C case temperature?

The IRF520STRR supports 6.5 A continuous drain current at T_C = 100 °C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limits of the D2PAK package and must be validated with actual PCB layout and heatsinking. The IRF520STRR's 0.27 Ω R_DS(on) contributes to this thermal constraint - conduction loss rises quadratically with current, requiring careful thermal design above 4 A in non-heatsinked applications.

Does IRF520STRR have a built-in body diode, and what are its key parameters?

Yes, the IRF520STRR integrates a parasitic body diode inherent to its N-channel MOSFET structure. Key diode parameters include 9.2 A continuous source-drain current, 1.8 V forward voltage at 9.2 A and 25 °C, and reverse recovery time of 110–260 ns. These values are critical when using the IRF520STRR in freewheeling or synchronous rectification roles - the IRF520STRR's t_rr directly impacts switching loss and EMI in hard-switched topologies.

Is IRF520STRR pin-compatible with other D2PAK MOSFETs like IRF540N?

No, IRF520STRR is not pin-compatible with IRF540N despite sharing the D2PAK package - they differ in die size, thermal resistance, and electrical characteristics. While both use the same 3-pin D2PAK footprint, the IRF520STRR has higher R_DS(on) (0.27 Ω vs. 0.044 Ω) and lower current rating (9.2 A vs. 33 A). Substituting IRF520STRR for IRF540N would require revalidation of thermal performance and gate drive sizing due to differing Q_g (16 nC vs. 71 nC) and SOA limits.

What is the gate threshold voltage range for IRF520STRR, and how does it affect drive requirements?

The IRF520STRR has a gate threshold voltage (V_GS(th)) range of 2.0 V to 4.0 V at I_D = 250 μA. This means reliable enhancement-mode turn-on begins near 2 V, but full R_DS(on) specification (0.27 Ω) requires V_GS ≥ 10 V. Driving the IRF520STRR with only 5 V logic risks incomplete turn-on and excessive conduction loss - optimal operation uses 10–15 V gate drive, confirmed by the IRF520STRR's Q_g = 16 nC and Q_gd = 7.7 nC values.

Can IRF520STRR be used in avalanche mode, and what are the limits?

Yes, the IRF520STRR is explicitly rated for repetitive avalanche operation with 6.0 mJ per pulse and single-pulse avalanche energy of 200 mJ. These ratings assume proper gate bias (V_GS ≥ 10 V), controlled dI/dt (<110 A/μs), and junction temperature ≤ 175 °C. Avalanche use must be verified per application - the IRF520STRR's data sheet specifies test conditions (V_DD = 25 V, L = 3.5 mH, R_g = 25 Ω) and warns that pulse width is limited by thermal constraints, not just energy.