Microchip Technology SMDA24C-4E3/TR13

Overview

SMDA24C-4E3/TR13 from Microsemi (now Microchip Technology) is a bidirectional transient voltage suppressor (TVS) array in SO-8 package, rated for 300 W peak pulse power (8/20 µs), 24 V standoff voltage (V_WM), and clamping voltage of 43 V at 1 A. It protects four I/O lines in industrial communication interfaces against ESD per IEC 61000-4-2, EFT per IEC 61000-4-4, and lightning-induced surges.

For engineers reviewing the SMDA24C-4E3/TR13 datasheet, SMDA24C-4E3/TR13 pinout, SMDA24C-4E3/TR13 application, or SMDA24C-4E3/TR13 equivalent, key selection criteria include verified 24 V working voltage margin, sub-1 µA leakage at V_WM, 90 pF line capacitance at 1 MHz, -55°C to +150°C operating range, and SO-8 mechanical compatibility with standard PCB footprints.

Technical Context

This TVS array employs silicon avalanche diode technology arranged in a quad-bidirectional configuration - two back-to-back diodes per channel - enabling symmetrical clamping on both polarities without polarity dependence. Each protected line exhibits 26.7 V minimum breakdown voltage (V_BR) at 1 mA and maintains ≤1 µA leakage current at its 24 V standoff rating.

The device operates across the full industrial temperature range (-55°C to +150°C) and delivers consistent 43 V clamping at 1 A and 55 V at 5 A under standardized 8/20 µs surge waveforms, meeting board-level protection requirements for high-reliability embedded I/O circuits where low capacitance and thermal stability are critical.

Key Specifications

Pinout & Package

SO-8 surface-mount package (JEDEC MS-012AC), molded plastic body, 0.150" wide, 1.27 mm pitch, pin #1 identified by dot marking. Weight: 0.066 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ24A-Q and SP1003-02HTG, the SMDA24C-4E3/TR13 uniquely combines quad-bidirectional protection, 300 W surge capacity, and SO-8 manufacturability - enabling compact, high-power board-level ESD/EFT defense without discrete duplication or thermal compromise.

Availability

SMDA24C-4E3/TR13 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and outdoor telecom infrastructure requiring stable component supply, long-term lifecycle support, and traceable sourcing of legacy-qualified TVS arrays.

Supply support for SMDA24C-4E3/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 SMDAxxC-4 series was developed specifically for board-level transient suppression in harsh-environment I/O interfaces, emphasizing thermal robustness, multi-line integration, and compliance with international EMC immunity standards.

FAQ

What is the standoff voltage rating of the SMDA24C-4E3/TR13?

The SMDA24C-4E3/TR13 has a standoff voltage (V_WM) of 24 V, meaning it remains non-conductive under continuous DC or RMS voltages up to this level. This rating ensures compatibility with 24 V industrial control systems and aligns with the IEC 61000-4-2 ESD protection requirement for circuits operating near this rail. The SMDA24C-4E3/TR13 maintains ≤1 µA leakage current at 24 V, confirming stable blocking behavior in normal operation.

Does the SMDA24C-4E3/TR13 support bidirectional signal lines like RS-485?

Yes, the SMDA24C-4E3/TR13 is explicitly designed for bidirectional data lines. Its internal quad-bidirectional architecture uses back-to-back diode pairs per channel, enabling symmetrical clamping for both positive and negative transients. This makes the SMDA24C-4E3/TR13 ideal for protecting RS-485, CAN, or LIN bus I/O where signal polarity alternates, unlike unidirectional TVS diodes that require careful orientation.

What is the clamping voltage of the SMDA24C-4E3/TR13 at 5 A surge current?

The SMDA24C-4E3/TR13 clamps to a maximum of 55 V at 5 A under an 8/20 µs surge waveform, as specified in the MSC0886 datasheet. This value defines the upper voltage limit imposed on protected circuitry during moderate-energy transients. Engineers use this parameter to verify that downstream components - such as RS-485 transceivers or microcontroller I/O pins - remain within their absolute maximum voltage ratings during such events.

Is the SMDA24C-4E3/TR13 compatible with automated SMT assembly processes?

Yes, the SMDA24C-4E3/TR13 is supplied in EIA-481-1-A compliant tape-and-reel format (2500 pcs per 13-inch reel), with standard SO-8 land pattern dimensions and 1.27 mm pitch. Its molded plastic body, defined pin #1 dot, and thermal profile tolerance support reliable reflow soldering per J-STD-020. The SMDA24C-4E3/TR13 is widely used in high-volume industrial PCB assembly without special process adjustments.

How does the SMDA24C-4E3/TR13 compare to the SMDA15C-4 in terms of voltage rating and application scope?

The SMDA24C-4E3/TR13 features a 24 V standoff voltage versus the SMDA15C-4's 15 V, making it suitable for higher-voltage industrial buses (e.g., 24 V PLC I/O) where the SMDA15C-4 would conduct prematurely. Both share identical SO-8 packaging and 300 W surge rating, but the SMDA24C-4E3/TR13's higher V_WM and 43 V clamping at 1 A provide greater margin for 24 V systems, while the SMDA15C-4 better fits 12–15 V automotive or embedded applications.