Vishay Siliconix IRF9530

Overview

IRF9530 from Vishay Siliconix is a P-channel enhancement-mode power MOSFET in TO-220AB package, rated for -100 V drain-source voltage, 12 A continuous drain current at 25 °C, and 0.30 Ω R_DS(on) at V_GS = -10 V. It supports repetitive avalanche operation up to 8.8 mJ, operates up to +175 °C junction temperature, and is optimized for high-reliability DC-DC converters, motor control H-bridges, and industrial power switches.

For engineers reviewing the IRF9530 datasheet, IRF9530 pinout, IRF9530 application, or IRF9530 equivalent, key selection criteria include its negative threshold voltage (-2.0 to -4.0 V), low gate charge (38 nC total), fast switching (12 ns turn-on delay), ruggedized avalanche rating, and compatibility with standard gate drivers in high-side switch configurations.

Technical Context

The IRF9530 uses a third-generation vertical DMOS structure optimized for low conduction loss and robust transient handling. Its P-channel topology enables high-side switching without level-shifting circuitry, and its 1.7 °C/W junction-to-case thermal resistance supports direct heatsink mounting for sustained 88 W dissipation at T_C = 25 °C.

It features integrated body diode with 120–240 ns reverse recovery time and 0.46–0.92 μC Q_rr, enabling moderate-frequency synchronous rectification. The device's -5.5 V/ns peak diode recovery dV/dt rating ensures stable operation under fast commutation in inductive loads.

Key Specifications

Pinout & Package

IRF9530 is housed in a TO-220AB package with isolated tab (drain-connected), standardized 3-pin through-hole layout, and 0.50 °C/W case-to-sink thermal resistance when mounted with thermal grease on flat surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRF9530, IRF9540 offers lower on-resistance for reduced conduction loss but demands more gate drive energy, while STP9PF10 trades slight R_DS(on) increase for faster switching and built-in electrical isolation-making each optimal for distinct trade-offs between thermal, switching, and layout constraints.

Availability

IRF9530 is available at Aetrix Electronics and suitable for industrial motor control, DC-DC converter high-side switching, and overvoltage protection circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for IRF9530 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 industrial reliability.

The IRF9530 belongs to Vishay's third-generation power MOSFET family, engineered for commercial-industrial applications demanding high avalanche energy tolerance, ease of paralleling, and stable operation across -55 °C to +175 °C ambient conditions.

FAQ

What is the maximum continuous drain current for IRF9530 at 100 °C case temperature?

The IRF9530 supports -8.2 A continuous drain current at T_C = 100 °C, per its linear derating factor of 0.59 W/°C from the 88 W maximum power dissipation at 25 °C. This value reflects real thermal limits under sustained conduction and must be validated with actual heatsink performance in the target application. IRF9530's R_DS(on) increases with temperature, so design margins should account for worst-case junction rise.

Is IRF9530 suitable for high-side switching without a charge pump or bootstrap circuit?

Yes, IRF9530 is inherently suited for high-side switching due to its P-channel architecture: applying a gate voltage near system ground fully enhances the channel when the source is tied to the positive rail. No level-shifting circuitry is required, unlike N-channel alternatives. IRF9530's -2.0 to -4.0 V V_GS(th) allows direct TTL or microcontroller-compatible drive in many cases, though -10 V is recommended for lowest R_DS(on).

Does IRF9530 have an integrated body diode, and what are its key parameters?

Yes, IRF9530 includes an integral reverse p-n junction body diode rated for -12 A continuous forward current and -48 A pulsed current. Key parameters include V_SD = -6.3 V at -12 A and 25 °C, reverse recovery time t_rr = 120–240 ns, and Q_rr = 0.46–0.92 μC. These values are measured under specified conditions (T_J = 25 °C, dI/dt = 100 A/μs) and directly impact efficiency in freewheeling paths.

What is the gate charge profile of IRF9530, and how does it affect driver selection?

IRF9530 has total gate charge Q_g = 38 nC, gate-source charge Q_gs = 6.8 nC, and gate-drain charge Q_gd = 21 nC at V_GS = -10 V. This profile indicates strong Miller effect dominance, requiring drivers capable of sinking ≥1 A peak current to achieve fast switching. IRF9530's Q_gd/Q_gs ratio (~3.1) suggests moderate sensitivity to voltage spikes during dV/dt transitions.

How does the avalanche rating of IRF9530 impact its use in inductive load switching?

IRF9530 is rated for repetitive avalanche energy E_AR = 8.8 mJ and single-pulse energy E_AS = 400 mJ, allowing safe operation during inductive turn-off transients without external clamping in many cases. This ruggedness simplifies designs like relay drivers or motor phase switches where stored inductor energy must be absorbed. However, each avalanche event contributes to cumulative wear, so lifetime analysis is recommended for high-duty-cycle applications involving IRF9530.