Microchip Technology SMAJ60AE3/TR13

Overview

SMAJ60AE3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for primary and secondary lightning surge protection in DC power rails and signal lines. It features a 60 V standoff voltage (V_WM), 66.7 V minimum breakdown voltage (V_BR), 107 V maximum clamping voltage at 4.7 A peak pulse current, 500 W peak pulse power rating at 10/1000 µs, and operates across –65 °C to +150 °C. It is used in industrial power supplies and telecom interface circuits requiring IEC61000-4-5 Class 3 compliance with 42 Ω source impedance.

For engineers reviewing the SMAJ60AE3/TR13 datasheet, SMAJ60AE3/TR13 pinout, SMAJ60AE3/TR13 application, or SMAJ60AE3/TR13 equivalent, this page delivers verified electrical parameters, DO-214AC package details, IEC-compliant surge performance data, and real-world design guidance for ESD/EFT/inductive switching protection without layout assumptions or generic claims.

Technical Context

This TVS diode employs an avalanche junction structure optimized for sub-nanosecond response (<100 ps theoretical turn-on for unidirectional operation) and low dynamic impedance under transient stress. Its thermal resistance of 15 °C/W (junction-to-lead) enables reliable 500 W surge dissipation when mounted on FR4 with recommended footprint.

The device complies with IEC61000-4-2 (±8 kV contact / ±15 kV air ESD), IEC61000-4-4 (4 kV EFT), and IEC61000-4-5 (secondary lightning: Class 3 at 42 Ω, Class 2 at 12 Ω). Standby leakage current is ≤5.2 µA at 60 V, supporting low-power system monitoring integrity.

Key Specifications

Pinout & Package

DO-214AC (SMA) package with cathode-indicated band marking; void-free thermosetting epoxy body (UL94V-0), matte-tin RoHS-compliant plating, C-bend leads solderable per MIL-STD-750 Method 2026.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ60AHE3/TR13, the SMAJ60AE3/TR13 omits high-reliability screening but retains identical surge performance and RoHS compliance for cost-sensitive industrial use; versus SMBJ60A-E3/52, it trades 100 W peak power and 2.5 °C/W thermal advantage for smaller DO-214AC footprint and direct drop-in replacement on legacy SMA layouts.

Availability

SMAJ60AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface protection, automotive BCMs, and renewable energy inverter monitoring requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for SMAJ60AE3/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.

The SMAJ series was engineered for surface-mount transient suppression in harsh environments, targeting applications demanding robust IEC61000-4-5 compliance, wide temperature operation, and RoHS-compliant manufacturing without performance compromise.

FAQ

What is the clamping voltage of SMAJ60AE3/TR13 at its rated peak pulse current?

The SMAJ60AE3/TR13 has a maximum clamping voltage (V_C) of 107 V at 4.7 A peak pulse current (I_PP) under the standardized 10/1000 µs waveform. This value is measured per Figure 2 in the official Microsemi datasheet MSC0270A Rev L and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ60AE3/TR13 maintains this clamping performance across its full operating temperature range.

Is SMAJ60AE3/TR13 unidirectional or bidirectional?

SMAJ60AE3/TR13 is a unidirectional transient voltage suppressor, indicated by the absence of "C" or "CA" in its part number suffix. It conducts only in reverse bias (cathode-to-anode) during overvoltage events and blocks forward current up to its rated forward surge capability of 40 A (8.3 ms half-sine). Bidirectional variants such as SMAJ60CAE3/TR13 would include the "CA" suffix and exhibit symmetrical clamping in both polarities.

What package type does SMAJ60AE3/TR13 use, and is it compatible with standard SMA footprints?

SMAJ60AE3/TR13 uses the DO-214AC (SMA) package, matching JEDEC standard dimensions with minor tolerance expansion per Microsemi's specification. Its mechanical outline aligns with industry-standard SMA footprints, including pad layout recommendations on page 5 of MSC0270A Rev L. The device features C-bend leads and RoHS-compliant matte-tin plating, ensuring compatibility with standard reflow profiles and automated placement equipment used for SMA-class components.

Does SMAJ60AE3/TR13 meet IEC61000-4-5 for lightning surge protection?

Yes, SMAJ60AE3/TR13 is validated for secondary lightning surge protection per IEC61000-4-5: it supports Class 3 (1 kV test level) with 42 Ω source impedance and Class 2 (1 kV) with 12 Ω source impedance. These classifications are explicitly listed in the Applications/Benefits section of the Microsemi datasheet MSC0270A Rev L. The SMAJ60AE3/TR13 achieves this through its 500 W peak pulse power rating and sub-100 ps response time, enabling effective energy diversion before protected ICs experience overstress.

What is the maximum steady-state power dissipation of SMAJ60AE3/TR13 at room temperature?

The SMAJ60AE3/TR13 dissipates up to 1.56 W continuously at ambient temperature (T_A) of 25 °C when mounted on an FR4 printed circuit board with 1 oz copper and the recommended footprint. This rating is derived from its thermal resistance of 80 °C/W (junction-to-ambient) and maximum junction temperature of +150 °C. At lead temperature (T_L) of 75 °C, the steady-state rating increases to 5 W, reflecting superior heat transfer when leads are thermally anchored to large copper planes.