Taiwan Semiconductor Corporation ES3B

Overview

ES3B from Taiwan Semiconductor is a 3 A, 100 V super fast recovery surface-mount rectifier diode in DO-214AB (SMC) package, featuring 35 ns reverse recovery time, 0.95 V forward voltage at 3 A, and 100 A peak surge current - used in high-frequency switching mode power supplies for computer and telecom systems.

For engineers reviewing the ES3B datasheet, ES3B pinout, ES3B application, or ES3B equivalent, key selection criteria include repetitive peak reverse voltage (100 V), thermal resistance (12 °C/W junction-to-lead), junction capacitance (45 pF), moisture sensitivity level (J-STD-020 Level 1), and RoHS/halogen-free compliance.

Technical Context

The ES3B is a single-die, glass-passivated silicon rectifier optimized for high-efficiency, high-frequency operation. Its 35 ns trr enables minimal switching losses in SMPS topologies, while its 12 °C/W R_θJL supports reliable thermal dissipation under continuous 3 A conduction.

Designed for automated SMT placement, the DO-214AB (SMC) package features matte tin-plated leads compliant with J-STD-002 and JESD 201 Class 2 whisker resistance. Polarity is marked by a cathode band; device weight is 0.210 g.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode-indicated band; dual-leaded, single-diode configuration; lead finish: matte tin per J-STD-002; UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-3EWH01-M3/45 and MUR3100CT, the ES3B delivers superior high-frequency efficiency via lower trr and V_F, fits automated SMT lines without baking, and maintains full J-STD-020 Level 1 process compatibility - making it optimal for compact, high-density telecom and server power modules.

Availability

ES3B is available at Aetrix Electronics and suitable for server power supplies, telecom DC-DC converters, and industrial PLC power modules requiring stable component supply, consistent parametric performance across production lots, and full RoHS/halogen-free compliance.

Supply support for ES3B 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, serving global industrial, computing, and communications markets since 1979.

The ES3B belongs to TSC's ES3x super fast rectifier family, engineered specifically for high-efficiency, high-frequency switching power conversion in space-constrained SMT applications - emphasizing low V_F, ultra-fast t_rr, and robust thermal and environmental reliability.

FAQ

What is the maximum junction temperature rating for the ES3B?

The ES3B has a maximum junction temperature (T_JMAX) of +150 °C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet N2102. This rating allows operation in high-ambient environments such as enclosed server power supplies or industrial control cabinets. Derating curves confirm usable current capacity down to 0 A at 150 °C case temperature. The ES3B must be mounted on thermally adequate PCB copper to maintain this limit under 3 A continuous load.

Does the ES3B have a specified reverse recovery charge (Q_rr) value?

The ES3B datasheet does not publish a numerical Q_rr value; only reverse recovery time (t_rr = 35 ns max) is specified under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A test conditions. Designers should estimate Q_rr using t_rr and diode capacitance (C_J = 45 pF) in conjunction with circuit dv/dt, or validate switching behavior empirically. The ES3B's low t_rr and C_J collectively indicate low stored charge relative to standard fast rectifiers.

Is the ES3B suitable for use in automotive applications?

The ES3B is not AEC-Q101 qualified and is not recommended for safety-critical automotive functions such as engine control or ADAS. However, it may be used in non-safety infotainment or body electronics DC-DC modules where ambient temperatures remain within –40 °C to +125 °C and reliability validation is performed by the end customer. Taiwan Semiconductor explicitly states these devices are "not designed for use in medical, life-saving, or life-sustaining applications" - automotive qualification requires additional testing beyond ES3B's published specs.

What is the cathode marking method on the ES3B package?

The ES3B uses a distinct cathode band printed on the molded DO-214AB (SMC) body to identify the cathode terminal - consistent with JEDEC standard polarity marking for surface-mount diodes. This band aligns with the cathode lead and must be oriented toward the positive output rail during PCB layout. The marking remains legible after standard reflow soldering and conforms to IPC-A-610 Class 2 visual inspection requirements. No laser etching or alternate marking is used on the ES3B.

Can the ES3B replace the ES3A in an existing design?

Yes, the ES3B can directly replace the ES3A in most designs because both share identical package (DO-214AB), forward current (3 A), surge rating (100 A), thermal resistance (12 °C/W), and recovery speed (35 ns). The only difference is V_RRM: ES3A = 50 V, ES3B = 100 V. Using ES3B provides 100% margin against 50 V-rated reverse transients - no layout or schematic changes are needed, and the ES3B maintains full functional and mechanical compatibility with the ES3A footprint and solder profile.