Taiwan Semiconductor Corporation ES2A

Overview

ES2A from Taiwan Semiconductor is a 2 A, 50 V super fast recovery surface-mount rectifier in DO-214AA (SMB) package, featuring 35 ns reverse recovery time, 0.95 V max forward voltage at 2 A, and 10 µA max reverse leakage at 25°C - used for freewheeling and snubber circuits in DC-DC converters.

For engineers reviewing the ES2A datasheet, ES2A pinout, ES2A application, or ES2A equivalent, key selection criteria include repetitive peak reverse voltage (50 V), surge current rating (50 A), thermal resistance (20 °C/W junction-to-lead), RoHS/halogen-free compliance, and J-STD-020 moisture sensitivity level 1.

Technical Context

The ES2A employs a glass-passivated silicon junction optimized for high-frequency switching operation. Its single-die configuration supports unidirectional conduction with cathode-band polarity marking and operates across –55°C to +150°C junction temperature range.

Thermal performance is defined by R_θJL = 20 °C/W and R_θJA = 75 °C/W, enabling reliable power dissipation in compact SMB layouts. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards for molded compound.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, low-profile, matte tin-plated leads, polarity indicated by cathode band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R05U and SB250, the ES2A delivers superior thermal interface (R_θJL = 20 °C/W), lower forward voltage, and stricter leakage control - making it optimal for high-density, thermally constrained SMB layouts requiring consistent J-STD-020 Level 1 manufacturability.

Availability

ES2A is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, LED driver snubbers, and AC–DC auxiliary supplies requiring stable component supply, full traceability, and long-term production continuity.

Supply support for ES2A 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 rectifiers, TVS diodes, MOSFETs, and bipolar transistors.

The ES2A belongs to TSC's ES2x super fast rectifier family, engineered for high-efficiency, high-frequency power conversion in space-constrained industrial and consumer power supplies.

FAQ

What is the maximum junction temperature rating for the ES2A?

The ES2A has a maximum junction temperature (T_JMAX) of +150°C, with an operational range from –55°C to +150°C. This rating enables use in thermally demanding environments such as enclosed power supplies or high-ambient industrial enclosures. Derating curves in the ES2A datasheet define allowable forward current versus lead temperature, ensuring safe operation within this limit.

Does the ES2A support automated SMT placement?

Yes, the ES2A supports automated surface-mount placement. Its DO-214AA (SMB) package features matte tin-plated leads compliant with J-STD-002 solderability standards and moisture sensitivity level 1 per J-STD-020 - eliminating pre-bake requirements and enabling direct placement in standard reflow profiles.

What is the reverse recovery time specification for ES2A and how is it measured?

The ES2A has a reverse recovery time (t_rr) of 35 ns maximum, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This parameter reflects the time required for the device to transition from forward conduction to reverse blocking, directly impacting switching loss and EMI in high-frequency power circuits.

Is the ES2A halogen-free and RoHS compliant?

Yes, the ES2A is both RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and all plating and materials meet EU Directive 2011/65/EU requirements - verified in TSC's L2102 revision documentation.

How does the ES2A differ from other members of the ES2x family like ES2B or ES2J?

The ES2A differs from other ES2x variants primarily in its V_RRM rating: ES2A is rated for 50 V, while ES2B is 100 V, ES2C is 150 V, and so on up to ES2J at 600 V. All share identical I_F (2 A), I_FSM (50 A), package (DO-214AA), and t_rr (35 ns), but forward voltage increases with voltage rating - ES2A has the lowest V_F (0.95 V max) in the series.