Vishay Siliconix IRFI9530G

Overview

IRFI9530G from Vishay Siliconix is a P-channel enhancement-mode power MOSFET in TO-220 FULLPAK package, rated for -100 V V_DS, 0.30 Ω R_DS(on) at V_GS = -10 V, and -7.7 A continuous drain current at T_C = 25 °C. It delivers 2.5 kV_RMS isolation, 175 °C maximum junction temperature, and is used in high-voltage DC-DC converters and industrial motor control circuits requiring robust avalanche capability.

For engineers reviewing the IRFI9530G datasheet, IRFI9530G pinout, IRFI9530G application, or IRFI9530G equivalent, this device is selected for isolated high-side switching, unclamped inductive load handling, and thermally demanding environments where low thermal resistance (R_thJC = 3.6 °C/W) and dynamic dV/dt immunity (-5.5 V/ns) are critical.

Technical Context

The IRFI9530G employs a third-generation silicon process optimized for ruggedized switching and low conduction loss. Its isolated TO-220 FULLPAK construction integrates high-voltage insulation (2.5 kV_RMS) directly into the package, eliminating external mica washers while maintaining 4.8 mm sink-to-lead creepage distance.

It supports repetitive avalanche operation up to -7.7 A with 4.2 mJ energy per pulse and features fast switching parameters: 12 ns turn-on delay, 52 ns rise time, 31 ns turn-off delay, and 39 ns fall time under standard test conditions (V_DD = -50 V, I_D = -12 A, R_G = 12 Ω).

Key Specifications

Pinout & Package

IRFI9530G uses the TO-220 FULLPAK package: insulated plastic body with integral heatsink tab (drain-connected), 3-lead through-hole configuration, 15.87 mm height, 10.10 mm width, and 4.70 mm thickness. The molded compound provides 2.5 kV_RMS isolation between drain and leads, replacing 100 µm mica barriers in legacy TO-220 designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP9PF10 and IXTP10P10P, the IRFI9530G uniquely combines certified 2.5 kV_RMS isolation, low R_thJC, and avalanche ruggedness in a single package-reducing BOM count, assembly labor, and thermal design complexity for safety-critical high-voltage switching.

Availability

IRFI9530G is available at Aetrix Electronics and suitable for industrial motor control, high-voltage DC-DC converters, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for IRFI9530G 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, reliability, and thermal performance.

The IRFI9530G belongs to Vishay's third-generation high-voltage P-channel MOSFET family, engineered for isolated high-side switching in commercial and industrial power systems where safety certification, thermal efficiency, and transient robustness are mandatory.

FAQ

What is the maximum continuous drain current rating for IRFI9530G at 100 °C case temperature?

The IRFI9530G has a continuous drain current rating of -5.4 A at T_C = 100 °C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limitations at elevated temperatures and must be applied in thermal design calculations alongside R_thJC = 3.6 °C/W to ensure junction temperature remains ≤175 °C. The IRFI9530G maintains full functionality across its entire -55 °C to +175 °C operating range.

Does IRFI9530G require external insulation when mounted to a heatsink?

No, the IRFI9530G does not require external insulation when mounted to a heatsink. Its TO-220 FULLPAK package incorporates molded isolation rated at 2.5 kV_RMS (60 s, 60 Hz) and provides 4.8 mm creepage distance between the drain tab and leads. This eliminates the need for mica washers or shoulder washers-unlike standard TO-220 devices-and simplifies mechanical assembly while preserving thermal performance. The IRFI9530G achieves this without compromising R_thJC = 3.6 °C/W.

What is the gate threshold voltage range for IRFI9530G, and how does it affect drive circuit design?

The IRFI9530G has a gate-source threshold voltage (V_GS(th)) range of -2.0 V to -4.0 V at I_D = 250 µA. This negative threshold confirms its P-channel enhancement-mode behavior and means the device begins conducting when V_GS falls below -2.0 V. Full enhancement requires V_GS ≤ -10 V to achieve R_DS(on) = 0.30 Ω. Drive circuits must therefore provide clean, well-regulated negative gate bias-typically using a dedicated gate driver IC or level-shifted supply-to avoid partial turn-on and excessive conduction loss. The IRFI9530G's V_GS(th) stability over temperature supports predictable switching across its full operating range.

Can IRFI9530G be used in avalanche mode, and what are the limits?

Yes, the IRFI9530G is rated for both single-pulse and repetitive avalanche operation. It specifies 380 mJ single-pulse avalanche energy (E_AS) and -7.7 A repetitive avalanche current (I_AR) with 4.2 mJ per pulse (E_AR). These ratings apply under defined test conditions (e.g., L = 9.6 mH, R_G = 25 Ω) and assume junction temperature remains within limits. Repetitive operation requires pulse width and duty cycle constraints per Figure 11 and note "a" in the datasheet. The IRFI9530G's avalanche ruggedness enables use in inductive switching applications like relay drivers without external protection components-provided layout minimizes stray inductance and thermal design sustains T_J ≤ 175 °C.

What is the drain-to-sink capacitance of IRFI9530G, and why does it matter in high-frequency designs?

The IRFI9530G has a drain-to-sink capacitance (C) of 12 pF, measured at 1.0 MHz with the drain connected to the isolated tab (sink). This parameter directly impacts common-mode noise coupling in high-frequency switching applications such as isolated DC-DC converters and motor drives. A low C value like 12 pF minimizes displacement current flow from drain to chassis/ground, reducing EMI emissions and improving EMC compliance-especially critical in medical and industrial equipment meeting CISPR 32 or EN 55032. Unlike standard TO-220 parts, the IRFI9530G's FULLPAK construction achieves this low capacitance while retaining 2.5 kV_RMS isolation, making it suitable for high-noise, safety-critical layouts.