Taiwan Semiconductor Corporation SRF1090

Overview

SRF1090 from Taiwan Semiconductor is a 10A, 90V Schottky barrier rectifier in ITO-220AB package with dual-die configuration, 4.0°C/W junction-to-case thermal resistance, 0.90V max forward voltage at 5A/25°C, and 100µA max reverse leakage at rated VR/25°C - used in high-efficiency DC-DC converters and industrial SMPS.

For engineers reviewing the SRF1090 datasheet, SRF1090 pinout, SRF1090 application, or SRF1090 equivalent, key selection factors include its 90V VRRM rating, AEC-Q101-qualified variants (SRF1090H), thermal performance under continuous 10A conduction, and compatibility with TO-220AB footprint layouts requiring low VF and high IFSM surge capability.

Technical Context

The SRF1090 employs dual Schottky die in a single ITO-220AB package to deliver 10A average forward current with symmetrical thermal path design. Its 90V repetitive peak reverse voltage and 63V RMS reverse rating support mid-range industrial and automotive auxiliary power rails.

With 4.0°C/W R_θJC, the device sustains operation up to 150°C junction temperature and withstands 120A non-repetitive surge current (8.3ms half-sine), enabling robust performance in transient-heavy switching topologies like flyback and synchronous rectification stages.

Key Specifications

Pinout & Package

Package: ITO-220AB - insulated thermally enhanced variant of TO-220AB with UL 94V-0 molding compound, matte tin-plated leads (J-STD-002 compliant), and 0.56 N·m maximum mounting torque. Polarity marked on case.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Compared with SRF1090, VS-10BQ090PBF offers better thermal resistance but demands external isolation, while SB1090 provides lower forward voltage at the expense of dual functionality and higher leakage - making SRF1090 optimal for space-constrained dual-path or automotive-grade designs requiring integrated insulation and low I_R.

Availability

SRF1090 is available at Aetrix Electronics and suitable for industrial SMPS, automotive DC-DC converters, and telecom power modules requiring stable component supply, long-life thermal reliability, and AEC-Q101-qualified variants (SRF1090H).

Supply support for SRF1090 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS devices, and MOSFETs since 1979.

The SRF1090 belongs to TSC's AEC-Q101-qualified Schottky rectifier family designed for high-efficiency, high-reliability power conversion in automotive, industrial, and telecom infrastructure applications.

FAQ

What is the maximum junction temperature rating for the SRF1090?

The SRF1090 has a maximum junction temperature (T_J) rating of +150°C, validated across its full operating range. This allows sustained 10A conduction in high-ambient environments such as enclosed industrial enclosures or under-hood automotive locations. The device maintains specified electrical parameters up to this limit, and its 4.0°C/W R_θJC enables predictable thermal design when mounted to an appropriately sized heatsink. SRF1090 must not exceed 150°C in any operational condition.

Does the SRF1090 have a dual-anode configuration, and how is it implemented?

Yes, the SRF1090 features a dual-die Schottky configuration with two independent anodes (Anode 1 and Anode 2) and a shared cathode terminal. This layout supports either dual-output rectification (e.g., ±12 V rails) or interleaved operation in high-current single-output designs. The ITO-220AB package integrates both dies electrically isolated from the tab, preserving the insulation advantage while enabling compact PCB layout - a key differentiator versus discrete diode pairs or single-anode alternatives like SB1090.

Is the SRF1090 RoHS and halogen-free compliant?

Yes, the SRF1090 meets RoHS Directive 2011/65/EU requirements and is halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. This compliance is documented in TSC's material declarations and supports global environmental regulations for consumer, industrial, and medical electronics. The SRF1090 is also UL Recognized (File # E-326243), confirming safety and process consistency.

What is the forward voltage specification for the SRF1090 at rated current?

The SRF1090 has a maximum forward voltage (V_F) of 0.90 V at 5 A and 25°C junction temperature, measured under pulsed conditions (PW = 0.3 ms). At full 10 A DC current and elevated temperature (e.g., 100°C), V_F typically rises to ~1.05 V. This low V_F directly reduces conduction losses - for example, at 10 A, power dissipation remains under 10.5 W, significantly lower than standard silicon rectifiers. The value is confirmed in TSC's L2105 datasheet revision.

How does the SRF1090 compare to the SRF10100 in terms of voltage rating and thermal performance?

The SRF1090 is rated for 90 V V_RRM, while the SRF10100 is rated for 100 V V_RRM; both share identical ITO-220AB packaging, 4.0°C/W R_θJC, 10 A I_F, and 120 A I_FSM. Their forward voltage specs differ slightly: SRF1090 max V_F is 0.90 V, whereas SRF10100 is 0.90 V (same), and reverse leakage is identical at 100 µA. Designers select SRF1090 where 90 V margin suffices and prefer SRF10100 only when strict 100 V system-level derating is mandated - otherwise, SRF1090 offers equivalent thermal and electrical behavior at potentially lower cost.