Taiwan Semiconductor Corporation TSD1GH

Overview

TSD1GH from Taiwan Semiconductor is a 1 A, 400 V repetitive peak reverse voltage glass-passivated standard rectifier diode in DO-214AC (SMA) package, featuring 40 A surge current capability, ≤1.25 V forward voltage at 1 A/25°C, and AEC-Q101 qualification for automotive power conversion.

For engineers reviewing the TSD1GH datasheet, TSD1GH pinout, TSD1GH application, or TSD1GH equivalent, key selection criteria include ESD immunity (≥8 kV HBM, ≥25 kV air discharge), thermal resistance (R_θJL = 39 °C/W), junction temperature range (–55 to +175 °C), and moisture sensitivity level 1 compliance.

Technical Context

The TSD1GH is a single-die, unidirectional silicon rectifier optimized for high-reliability DC–DC conversion and snubber circuits in harsh environments. Its glass-passivated junction ensures stable leakage performance up to 125 °C (I_R ≤ 50 µA) and supports automated SMT placement via matte tin-plated leads compliant with J-STD-002.

Thermal design is enabled by low R_θJL (39 °C/W) and R_θJC (43 °C/W) values measured on a 5 mm × 5 mm copper pad PCB, while its DO-214AC (SMA) outline meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance standards.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration with cathode band polarity marking. Weight: 0.060 g. Molding compound: UL 94V-0 rated.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R04 and MUR1040, the TSD1GH delivers superior thermal efficiency (R_θJL = 39 °C/W), automotive-grade reliability, and lower forward voltage-making it optimal for thermally constrained, safety-critical 12–48 V automotive power stages where standard recovery suffices.

Availability

TSD1GH is available at Aetrix Electronics and suitable for automotive lighting, DC–DC converter secondary-side rectification, and snubber network design requiring stable component supply, AEC-Q101 compliance, and consistent DO-214AC (SMA) packaging.

Supply support for TSD1GH 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 devices, ESD protection, and automotive-qualified components.

The TSD1GH belongs to TSC's AEC-Q101-qualified standard rectifier product line, engineered specifically for robust, thermally efficient power conversion in automotive subsystems operating under wide ambient and junction temperature ranges.

FAQ

What is the maximum junction temperature rating for the TSD1GH?

The TSD1GH has a maximum junction temperature (T_JMAX) of +175 °C, verified per AEC-Q101 stress testing. This rating allows reliable operation in under-hood automotive environments where ambient temperatures exceed 125 °C. The device maintains specified electrical parameters-including reverse leakage (≤50 µA at 125 °C) and forward voltage-within this full range. Thermal design must account for R_θJL = 39 °C/W to ensure T_J stays within limit under actual load conditions.

Is the TSD1GH pin-compatible with other DO-214AC rectifiers like the 1N4007?

Yes, the TSD1GH uses the standard DO-214AC (SMA) package with identical mechanical dimensions and lead spacing as the 1N4007 and other SMA rectifiers. However, it is not a direct functional replacement: the 1N4007 is rated for only 1000 V V_RRM and lacks AEC-Q101 qualification, ESD immunity, and thermal specs of the TSD1GH. Layout reuse is possible, but system-level validation is required for automotive use cases.

Does the TSD1GH meet halogen-free and RoHS requirements?

Yes, the TSD1GH is halogen-free per IEC 61249-2-21 and RoHS compliant, confirmed in the official Taiwan Semiconductor documentation. The molding compound contains no brominated flame retardants or chlorine-based additives, and all terminations use matte tin plating meeting J-STD-002 solderability standards. These attributes support compliance with EU Directive 2011/65/EU and customer sustainability requirements for automotive and industrial end products.

What is the ESD robustness of the TSD1GH, and which standards does it meet?

The TSD1GH achieves ≥8 kV human-body-model (HBM) per AEC-Q101-001, ≥25 kV air-discharge per IEC 61000-4-2, and ≥25 kV air-discharge per ISO 10605. These ratings reflect tested immunity-not just specification claims-and enable safe handling during automated SMT assembly and field operation in electrically noisy automotive environments. No external ESD protection is needed for typical board-level integration.

Can the TSD1GH be used in snubber circuits, and what electrical parameters support that application?

Yes, the TSD1GH is explicitly recommended for snubber networks. Its 14 pF junction capacitance (measured at 1 MHz, 4 V) provides predictable clamping behavior, while its standard recovery characteristic avoids high-frequency ringing. Combined with 40 A I_FSM and 400 V V_RRM, it safely absorbs inductive energy spikes in MOSFET/IGBT gate-drive and power-stage snubbers. The glass-passivated junction ensures stable C_J and leakage across temperature, critical for repeatable snubber timing.