Taiwan Semiconductor Corporation SRF1030

Overview

SRF1030 from Taiwan Semiconductor is a 10A, 30V AEC-Q101-qualified Schottky barrier rectifier in ITO-220AB package with dual-die configuration, 120A surge rating, 3.5°C/W junction-to-case thermal resistance, and 0.55V max forward voltage at 5A/25°C - used in automotive-grade DC-DC converters and industrial SMPS.

For engineers reviewing the SRF1030 datasheet, SRF1030 pinout, SRF1030 application, or SRF1030 equivalent, key selection criteria include repetitive peak reverse voltage (30 V), forward current rating (10 A), thermal performance (R_θJC = 3.5°C/W), AEC-Q101 qualification status, and ITO-220AB mounting compatibility.

Technical Context

The SRF1030 implements a dual-die Schottky structure optimized for low forward voltage drop and high surge robustness. Its 30 V V_RRM and 120 A I_FSM support transient-heavy switching topologies, while the ITO-220AB package enables direct heatsink mounting with 0.56 N·m torque limit.

Thermal design is enabled by R_θJC = 3.5°C/W and maximum junction temperature of +125°C (standard grade). Reverse leakage is limited to 500 µA at 25°C and 15 mA at 100°C, ensuring stable operation under elevated ambient conditions.

Key Specifications

Pinout & Package

Package: ITO-220AB - Insulated TO-220 variant with isolated tab, UL 94V-0 molding compound, matte tin-plated leads, and polarity marking per device body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SRF1030, VS-10BQ030 trades electrical isolation for lower cost and wider distribution, while MBR1030CT extends thermal operating range at the expense of forward voltage - making SRF1030 optimal for AEC-Q101-compliant 125°C-junction automotive systems requiring low-loss rectification.

Availability

SRF1030 is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS secondary rectification, and AC-DC adapter output stages requiring stable component supply, AEC-Q101 qualification, and ITO-220AB thermal performance.

Supply support for SRF1030 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and consumer markets since 1979.

The SRF10xx series targets high-reliability power conversion with AEC-Q101 qualification, low VF Schottky architecture, and thermally optimized ITO-220AB packaging for demanding automotive and industrial applications.

FAQ

What is the maximum junction temperature rating for the SRF1030?

The standard-grade SRF1030 has a maximum junction temperature (T_J) of +125°C. This rating applies to the non-AEC-Q101 version. The AEC-Q101-qualified variant (SRF1030H) maintains the same T_J limit but adds stress-test validation across temperature cycling, humidity, and mechanical shock per AEC specification. Thermal design must ensure T_J does not exceed this value under worst-case load and ambient conditions.

Is the SRF1030 pin-compatible with other devices in the SRF10xx family?

Yes, all SRF10xx devices - including SRF1020, SRF1030, SRF1040 through SRF10200 - share identical ITO-220AB package dimensions, pinout, and terminal configuration. The only differences are V_RRM (20–200 V), forward voltage, and leakage current, which scale with voltage rating. This allows direct substitution within the same board layout when voltage and thermal requirements align.

Does the SRF1030 have an isolated tab, and why does it matter?

Yes, the SRF1030 uses the ITO-220AB package with an electrically isolated metal tab. Unlike standard TO-220AC, the isolation eliminates need for mica washers or silicone pads when mounting to grounded heatsinks. This reduces thermal interface resistance, simplifies assembly, and improves long-term reliability in automotive and industrial environments where vibration and thermal cycling are present.

What is the forward voltage specification for the SRF1030, and how is it measured?

The SRF1030 has a maximum forward voltage (V_F) of 0.55 V at I_F = 5 A and T_J = 25°C, measured using a 0.3 ms pulse width to avoid self-heating. At higher currents or temperatures, V_F increases - e.g., ~0.62 V at 10 A and 25°C. This low V_F directly reduces conduction losses in high-current DC-DC stages, improving overall power supply efficiency compared to higher-V_F alternatives.

How does the SRF1030's AEC-Q101 qualification impact its use in automotive designs?

The AEC-Q101 qualification for SRF1030H confirms compliance with stress tests covering temperature cycling, high-temperature reverse bias, and mechanical shock - required for power components in engine compartments and ADAS ECUs. It validates reliability under automotive environmental extremes, enabling direct use in safety-critical 12 V/48 V subsystems without additional qualification effort by the system integrator.