Microchip Technology SMDA03-6E3/TR13

Overview

SMDA03-6E3/TR13 from Microsemi (now Microchip Technology) is a unidirectional 6-channel Transient Voltage Suppressor (TVS) array in SO-8 package, rated for 300 W peak pulse power (8/20 µs), with 3.3 V standoff voltage (V_WM), 4.0 V minimum breakdown (V_BR @1 mA), and 7.0 V clamping voltage at 1 A - designed for board-level ESD/EFT protection of I/O transceivers in industrial and telecom interfaces.

For engineers reviewing the SMDA03-6E3/TR13 datasheet, SMDA03-6E3/TR13 pinout, SMDA03-6E3/TR13 application, or SMDA03-6E3/TR13 equivalent, key selection criteria include V_WM ≥ circuit operating voltage, clamping performance under 1–5 A surge, SO-8 thermal and layout compatibility, and IEC 61000-4-2/4-4 compliance for system-level immunity validation.

Technical Context

This TVS array implements six independent unidirectional avalanche diode structures in a single SO-8 package, each configured as a cathode-to-GND clamp. It operates within -55°C to +150°C ambient range and supports ≤0.01% pulse repetition rate per line.

Clamping behavior is characterized at 1 A and 5 A (7.0 V and 9.0 V respectively), with leakage current ≤200 µA at 3.3 V and junction capacitance of 800 pF at 0 V (1 MHz), making it suitable for low-speed data lines where capacitive loading is acceptable.

Key Specifications

Pinout & Package

SO-8 surface-mount package (JEDEC MS-012AC), 4.9 mm × 6.0 mm footprint, 1.75 mm max height, with pin #1 identified by dot marking. Thermal pad not present; standard reflow profile applies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ3.3A-13-F and PGB1010603, SMDA03-6E3/TR13 provides superior energy absorption (300 W) and integrated 6-line coordination in SO-8, trading off higher capacitance for robustness in industrial I/O protection where speed is secondary to reliability.

Availability

SMDA03-6E3/TR13 is available at Aetrix Electronics and suitable for industrial serial interface protection, telecom line card guarding, embedded controller GPIO shielding, and power supply monitoring bus protection requiring stable component supply across long-lifecycle programs.

Supply support for SMDA03-6E3/TR13 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

Microsemi Corporation (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.

The SMDAxx-6 TVS array product line was engineered specifically for board-level transient suppression in harsh electromagnetic environments, targeting ESD-prone I/O interfaces in programmable logic controllers, base station equipment, and motor drive control systems.

FAQ

What is the standoff voltage rating of the SMDA03-6E3/TR13?

The SMDA03-6E3/TR13 has a standoff voltage (V_WM) of 3.3 V, meaning it remains non-conductive up to this DC or continuous peak AC voltage. This value is selected to match common 3.3 V logic rails and must be ≥ the maximum operating voltage of the protected line to prevent unintended conduction during normal operation. The SMDA03-6E3/TR13 datasheet confirms this rating is guaranteed across temperature and lifetime.

Does the SMDA03-6E3/TR13 meet IEC 61000-4-2 and IEC 61000-4-4 standards?

Yes, the SMDA03-6E3/TR13 is explicitly rated for compliance with IEC 61000-4-2 (ESD immunity) and IEC 61000-4-4 (electrical fast transients) per its original MSC0332A.PDF specification. It delivers Level 4 ESD protection (±15 kV contact, ±20 kV air) and withstands 4 kV EFT bursts, validated using standardized test waveforms and fixtures. The SMDA03-6E3/TR13 achieves this through its 300 W peak pulse power rating and sub-10 ns response time.

How many protected lines does the SMDA03-6E3/TR13 support?

The SMDA03-6E3/TR13 supports exactly six unidirectional data or interface lines, implemented as six independent avalanche diode paths inside a single SO-8 package. Pins 1, 2, 3, 6, 7, and 8 serve as cathodes for each protected line, while Pins 4 and 5 are tied to common GND. This architecture enables compact board-level protection without channel crosstalk, as confirmed in the device's circuit diagram and pinout documentation for SMDA03-6E3/TR13.

What is the clamping voltage of the SMDA03-6E3/TR13 at 5 A surge current?

The clamping voltage (V_C) of the SMDA03-6E3/TR13 is 9.0 V at 5 A (8/20 µs pulse), as specified in the Electrical Characteristics table of the MSC0332A.PDF datasheet. This value defines the maximum voltage imposed on the protected line during a high-current transient event, ensuring downstream components like RS-485 transceivers or microcontroller GPIOs remain within safe absolute maximum ratings. The SMDA03-6E3/TR13 maintains this clamping performance consistently across all six channels.

Is the SMDA03-6E3/TR13 suitable for high-speed data lines such as USB or HDMI?

No, the SMDA03-6E3/TR13 is not suitable for USB 2.0, HDMI, or other high-speed differential interfaces due to its 800 pF junction capacitance at 0 V (1 MHz), which would severely distort signal edges and violate eye diagram requirements. It is intended for low-to-medium speed lines (≤10 Mbps), such as RS-232, RS-485, CAN, or GPIO buses. For high-speed applications, alternative low-capacitance TVS arrays like the PGB1010603 (30 pF) should be evaluated instead of the SMDA03-6E3/TR13.