Taiwan Semiconductor Corporation 5.0SMDJ100A

Overview

5.0SMDJ100A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and I/O interfaces. It features a 100 V working standoff voltage (V_WM), 111–123 V breakdown voltage (V_BR), 162 V maximum clamping voltage (V_C) at 30.9 A peak pulse current, and 5000 W peak pulse power (10/1000 µs). It is used in AC/DC power supplies to protect downstream regulators and controllers from lightning-induced surges.

For engineers reviewing the 5.0SMDJ100A datasheet, 5.0SMDJ100A pinout, 5.0SMDJ100A application, or 5.0SMDJ100A equivalent, key selection criteria include clamping performance under 30.9 A IPP, thermal resistance (R_θJA = 61 °C/W), DO-214AB (SMC) package compatibility with automated placement, and unidirectional polarity indicated by cathode band.

Technical Context

The 5.0SMDJ100A employs a stacked-die construction in a DO-214AB (SMC) package to achieve high peak pulse power handling while maintaining fast response time (<1.0 ps) and low junction-to-ambient thermal resistance (61 °C/W). Its unidirectional configuration provides forward conduction capability with 5 V forward voltage at 100 A.

It operates across –55 °C to +175 °C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 requirements. The device uses photo-glass passivated chip junctions for stable long-term reliability under repetitive surge stress.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Matte tin-plated leads, RoHS and halogen-free compliant, UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Compared with SMBJ100A and SMCJ100A, the 5.0SMDJ100A offers identical 5000 W surge rating and DO-214AB footprint as SMCJ100A but with lower leakage (2 µA vs. 5 µA), making it preferable for battery-backed or always-on monitoring circuits where standby current matters.

Availability

5.0SMDJ100A is available at Aetrix Electronics and suitable for AC/DC power supply input protection, industrial I/O interface surge hardening, and telecom line card transient suppression requiring stable component supply and full traceability.

Supply support for 5.0SMDJ100A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers, with global distribution and AEC-Q200 qualified product lines.

The 5.0SMDJ series is engineered for high-reliability industrial and telecom surge protection, emphasizing high peak power density, tight V_BR tolerance, and MSL Level 1 manufacturability in surface-mount packages.

FAQ

What is the maximum clamping voltage of the 5.0SMDJ100A under standard surge conditions?

The 5.0SMDJ100A has a maximum clamping voltage (V_C) of 162 V when subjected to a 10/1000 µs waveform with a peak pulse current (I_PP) of 30.9 A. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. Designers use this parameter to verify margin against downstream IC absolute maximum ratings. The 5.0SMDJ100A maintains this clamping performance across its full operating temperature range.

Is the 5.0SMDJ100A unidirectional or bidirectional, and how is polarity identified?

The 5.0SMDJ100A is a unidirectional TVS diode, meaning it conducts only in reverse bias during overvoltage events and behaves as a standard diode in forward bias. Polarity is marked by a distinct cathode band on the DO-214AB (SMC) package body. During layout, the cathode must be connected to the line being protected (e.g., +100 V rail), and the anode to ground or return path. The 5.0SMDJ100A's forward voltage is 5 V at 100 A, confirming its unidirectional conduction behavior.

What is the thermal resistance profile of the 5.0SMDJ100A, and how does it affect PCB layout?

The 5.0SMDJ100A has a junction-to-ambient thermal resistance (R_θJA) of 61 °C/W when mounted on a 16 mm × 16 mm copper pad test board. Its junction-to-lead (R_θJL) and junction-to-case (R_θJC) values are 16 °C/W and 17 °C/W respectively. These values require adequate copper pour and thermal vias beneath the DO-214AB footprint to sustain repeated surges. Reducing R_θJA below 61 °C/W via enhanced heatsinking directly improves surge repetition rate capability for the 5.0SMDJ100A.

Does the 5.0SMDJ100A meet moisture sensitivity and lead-free assembly requirements?

Yes, the 5.0SMDJ100A is rated at Moisture Sensitivity Level (MSL) 1 per J-STD-020, allowing unlimited floor life and standard reflow without pre-baking. Its matte tin-plated leads comply with J-STD-002 solderability requirements, and the device is fully RoHS compliant and halogen-free per IEC 61249-2-21. These attributes make the 5.0SMDJ100A compatible with modern lead-free reflow profiles and high-volume automated assembly processes without process modification.

How does the 5.0SMDJ100A compare to the 5.0SMDJ90A in terms of voltage ratings and clamping performance?

The 5.0SMDJ100A has a 100 V working standoff voltage (V_WM) versus 90 V for the 5.0SMDJ90A, with corresponding breakdown voltages of 111–123 V and 100–111 V. Its clamping voltage is 162 V at 30.9 A, compared to 146 V at 34.3 A for the 5.0SMDJ90A. While both share the same 5000 W rating, the 5.0SMDJ100A supports higher nominal bus voltages and delivers tighter clamping margin relative to its V_WM, making it optimal for 100 V systems where headroom above V_WM must be preserved.