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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Microchip Technology SMAJ9.0E3/TR13

Name: SMAJ9.0E3/TR13
Brand: Microchip Technology
SKU: SMAJ9.0E3/TR13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMAJ9.0E3/TR13

Manufacturer:: Microchip Technology

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: SMAJ9.0E3/TR13.pdf

Description:: TVS DIODE 9VWM 16.9VC DO214AC

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Product details

Overview

SMAJ9.0E3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) designed for primary and secondary surge protection in DC power rails and signal lines. It features a 9.0 V reverse standoff voltage (V_WM), 10.0 V minimum breakdown voltage (V_BR), 16.9 V maximum clamping voltage (V_C) at 29.5 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial power supplies and automotive body control modules.

For engineers reviewing the SMAJ9.0E3/TR13 datasheet, SMAJ9.0E3/TR13 pinout, SMAJ9.0E3/TR13 application, or SMAJ9.0E3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-5 (42 Ω source), low standby leakage (<5 µA @ V_WM), RoHS-compliant matte-tin plating, and compatibility with automated SMT assembly using EIA-481-1-A tape-and-reel packaging.

Technical Context

This TVS diode operates as a unidirectional avalanche clamp, triggered when transient voltage exceeds its 10.0 V breakdown threshold at 1 mA test current. Its sub-100 ps theoretical response time enables effective suppression of ESD per IEC61000-4-2 (±8 kV contact) and EFT per IEC61000-4-4 (±2 kV).

Thermal design relies on low junction-to-lead thermal resistance (15 °C/W) and FR4 PCB mounting with recommended footprint; steady-state dissipation is rated at 5 W at lead temperature (T_L) = 75 °C. The device uses void-free UL94V-0 epoxy encapsulation and C-bend leads compatible with standard reflow profiles (260 °C/10 s).

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	9.0 V - Maximum continuous DC or RMS operating voltage before clamping initiates
V_BR min @ I_BR	10.0 V @ 1 mA - Ensures reliable turn-on margin above nominal rail voltage
V_C @ I_PP	16.9 V @ 29.5 A - Limits downstream voltage stress during 10/1000 µs surges
P_PP	500 W - Peak power handling capability defines surge energy absorption capacity
I_D @ V_WM	<5 µA - Negligible leakage ensures minimal impact on low-power sensor or logic circuits
Package	DO-214AC (SMA) - Industry-standard surface-mount outline with 7.6 mm x 4.5 mm footprint
RoHS	e3 suffix - Matte-tin plating compliant with EU Directive 2011/65/EU and JEDEC J-STD-020B Level 1 moisture sensitivity

Pinout & Package

Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy case with cathode band marking; weight 0.064 g; moisture sensitivity level 1 (no dry pack required).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Low-side connection to protected circuit ground or return path	Provides low-impedance surge current path to reference plane during clamping
Cathode	High-side connection to protected line (e.g., +12 V rail)	Marked by band; reverse-biased during normal operation; avalanches into conduction during overvoltage

Key Features

Feature	Design Value
500 W peak pulse power	Supports robust protection against IEC61000-4-5 Class 4 (42 Ω source) lightning-induced transients
16.9 V clamping at 29.5 A	Keeps downstream ICs (e.g., CAN transceivers, microcontrollers) within safe absolute maximum ratings
Sub-100 ps theoretical response	Enables suppression of fast-rising ESD events before sensitive gate oxides fail
RoHS-compliant e3 plating	Matte-tin termination ensures solderability and reliability in lead-free reflow processes
Tape-and-reel TR13 packaging	2500 units per 13-inch reel enables high-volume automated placement without manual handling

Applications

Automotive Body Control Module	Industrial PLC Digital Input
Use Scenario: 12 V battery-supplied microcontroller inputs exposed to load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input pin and chassis ground to clamp positive surges only. Use Value: Clamps 16.9 V at 29.5 A, protecting 5 V tolerant GPIOs while surviving ISO 7637-2 Pulse 5a (120 V/100 ms) with external series impedance.	Use Scenario: 24 V DC digital input channel receiving signals from field sensors in factory automation. IC Role / Device Role / Timing Role: Primary surge suppressor on the front-end of optocoupler-isolated input stage. Use Value: Withstands repeated 500 W transients per IEC61000-4-5 (42 Ω source), extending mean time between failures in harsh EMI environments.
Telecom Power Interface	Medical Equipment DC Rail
Use Scenario: -48 V telecom power feed entering base station equipment with remote monitoring interfaces. IC Role / Device Role / Timing Role: Bidirectional variant not applicable; SMAJ9.0E3/TR13 used on positive rail only, paired with complementary device on negative rail. Use Value: 9.0 V V_WM allows use on regulated +9 V auxiliary supplies; <5 µA leakage avoids loading precision bias networks.	Use Scenario: +5 V or +3.3 V internal supply rail feeding analog front-end (AFE) and ADC in diagnostic imaging subsystems. IC Role / Device Role / Timing Role: Final-stage TVS on clean power domain to prevent latch-up or parametric shift from ESD coupling. Use Value: 16.9 V clamping ensures AFE remains below 20 V absolute max rating even during ±8 kV IEC61000-4-2 contact discharge.

Automotive Body Control Module

Industrial PLC Digital Input

Use Scenario: 12 V battery-supplied microcontroller inputs exposed to load-dump and jump-start transients.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between input pin and chassis ground to clamp positive surges only.

Use Value: Clamps 16.9 V at 29.5 A, protecting 5 V tolerant GPIOs while surviving ISO 7637-2 Pulse 5a (120 V/100 ms) with external series impedance.

Use Scenario: 24 V DC digital input channel receiving signals from field sensors in factory automation.

IC Role / Device Role / Timing Role: Primary surge suppressor on the front-end of optocoupler-isolated input stage.

Use Value: Withstands repeated 500 W transients per IEC61000-4-5 (42 Ω source), extending mean time between failures in harsh EMI environments.

Telecom Power Interface

Medical Equipment DC Rail

Use Scenario: -48 V telecom power feed entering base station equipment with remote monitoring interfaces.

IC Role / Device Role / Timing Role: Bidirectional variant not applicable; SMAJ9.0E3/TR13 used on positive rail only, paired with complementary device on negative rail.

Use Value: 9.0 V V_WM allows use on regulated +9 V auxiliary supplies; <5 µA leakage avoids loading precision bias networks.

Use Scenario: +5 V or +3.3 V internal supply rail feeding analog front-end (AFE) and ADC in diagnostic imaging subsystems.

IC Role / Device Role / Timing Role: Final-stage TVS on clean power domain to prevent latch-up or parametric shift from ESD coupling.

Use Value: 16.9 V clamping ensures AFE remains below 20 V absolute max rating even during ±8 kV IEC61000-4-2 contact discharge.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMCJ9.0A-E3/57T	Higher 1500 W peak power, larger DO-214AB (SMC) package, 10.0 V V_BR, 14.4 V V_C @ 104 A	Used where higher surge energy (e.g., IEC61000-4-5 Class 3 with 12 Ω source) requires greater margin	Select when board space permits larger footprint and system-level testing demands >500 W capability
SMBJ9.0A-E3/52T	Lower 600 W peak power, DO-214AA (SMB) package, 10.0 V V_BR, 14.4 V V_C @ 41.7 A	Preferred for compact layouts with moderate surge exposure (e.g., consumer USB power ports)	Choose when footprint area is constrained but 600 W rating meets IEC61000-4-5 Class 2 requirements

Compared with SMAJ9.0E3/TR13, SMCJ9.0A-E3/57T delivers 3× peak power in a larger package for heavy-duty industrial mains interfaces, while SMBJ9.0A-E3/52T trades 100 W for 30% smaller PCB area - both retain identical V_WM/V_BR and RoHS compliance but differ in thermal mass and surge endurance.

Availability

SMAJ9.0E3/TR13 is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, and medical diagnostic equipment requiring stable component supply across extended production lifecycles.

Supply support for SMAJ9.0E3/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 developed for cost-effective, high-speed transient suppression in space-constrained surface-mount designs - targeting applications where fast response, repeatable clamping, and RoHS compliance are mandatory.

FAQ

What is the clamping voltage of SMAJ9.0E3/TR13 at its rated peak pulse current?

The SMAJ9.0E3/TR13 has a maximum clamping voltage (V_C) of 16.9 V when subjected to its rated 29.5 A peak pulse current (I_PP) under the standard 10/1000 µs waveform. This value is measured per Microsemi's MSC0270A datasheet and defines the upper voltage limit imposed on protected circuitry during surge events.

Is SMAJ9.0E3/TR13 unidirectional or bidirectional?

SMAJ9.0E3/TR13 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" in its part number suffix. It conducts only during positive overvoltage conditions on its cathode terminal and blocks reverse current during normal operation - making it suitable for DC rail protection where polarity is fixed.

Does SMAJ9.0E3/TR13 meet IEC61000-4-5 lightning surge standards?

Yes, SMAJ9.0E3/TR13 is rated for secondary lightning surge protection per IEC61000-4-5 with 42 Ω source impedance up to Class 4 (V_WM ≤ 12 V), confirmed by its 500 W peak pulse power rating and 16.9 V clamping performance at 29.5 A - enabling use in industrial Ethernet ports and AC/DC adapter inputs.

What is the maximum steady-state power dissipation for SMAJ9.0E3/TR13?

The SMAJ9.0E3/TR13 dissipates up to 5 W continuously when mounted on an FR4 PCB with 1 oz copper and operated at a lead temperature (T_L) of 75 °C. At ambient temperature (T_A) = 25 °C, its steady-state rating drops to 1.56 W due to reduced thermal convection efficiency.

What does the "TR13" suffix indicate in SMAJ9.0E3/TR13?

The "TR13" suffix denotes tape-and-reel packaging per EIA-481-1-A standard, with 2500 units per 13-inch reel. This format supports automated pick-and-place assembly and ensures consistent orientation (cathode band facing designated direction) for high-yield SMT manufacturing of SMAJ9.0E3/TR13.

SMAJ9.0E3/TR13 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Package/Case:: DO-214AC, SMA

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 9V

Voltage - Breakdown (Min):: 10V

Voltage - Clamping (Max) @ Ipp:: 16.9V

Current - Peak Pulse (10/1000µs):: 29.5A

Power - Peak Pulse:: 500W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

SMAJ9.0E3/TR13 FAQ

1.How can I place an order for SMAJ9.0E3/TR13 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMAJ9.0E3/TR13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SMAJ9.0E3/TR13 reliable?

The price and inventory of SMAJ9.0E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ9.0E3/TR13 is usually 5 days.

3.What payment methods are accepted for SMAJ9.0E3/TR13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0E3/TR13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMAJ9.0E3/TR13?

SMAJ9.0E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMAJ9.0E3/TR13 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SMAJ9.0E3/TR13?

For technical support, including SMAJ9.0E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0E3/TR13 requirements.

6.How does Aetrix verify that SMAJ9.0E3/TR13 is sourced from the original manufacturer or authorized distributors?

All SMAJ9.0E3/TR13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMAJ9.0E3/TR13 meets industry standards.

7.What is the process for return or replacement of SMAJ9.0E3/TR13?

All SMAJ9.0E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0E3/TR13, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SMAJ9.0E3/TR13 part is unused and in its original packaging.

Return procedure for SMAJ9.0E3/TR13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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