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

Microchip Technology SMAJ8.0AE3/TR13

Name: SMAJ8.0AE3/TR13
Brand: Microchip Technology
SKU: SMAJ8.0AE3/TR13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMAJ8.0AE3/TR13

Manufacturer:: Microchip Technology

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: SMAJ8.0AE3/TR13.pdf

Description:: TVS DIODE 8VWM 13.6VC DO214AC

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Product details

Overview

SMAJ8.0AE3/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 8.0 V reverse standoff voltage (V_WM), 8.89 V minimum breakdown voltage (V_BR), 13.6 V maximum clamping voltage (V_C) at 36.7 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform-used in industrial power supplies and automotive body control modules.

For engineers reviewing the SMAJ8.0AE3/TR13 datasheet, SMAJ8.0AE3/TR13 pinout, SMAJ8.0AE3/TR13 application, or SMAJ8.0AE3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-5 Class 4 (12 Ω source), low standby leakage (<1 µA @ V_WM), RoHS-compliant matte-tin plating, and compatibility with automated SMT assembly on FR4 boards using standard DO-214AC footprint.

Technical Context

This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 8.89 V breakdown threshold at 1 mA test current. Its <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), while maintaining low capacitance (<100 pF) to avoid signal integrity degradation in data lines.

Thermal design relies on junction-to-lead thermal resistance of 15 °C/W and 1.56 W steady-state dissipation at 25 °C ambient on standard FR4 (1 oz Cu). The device is rated for operation from –65 °C to +150 °C and supports reflow soldering up to 260 °C for 10 s, meeting IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	8.0 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin above nominal 5–7 V rail voltages.
V_BR min @ I_BR	8.89 V @ 1 mA - Confirmed avalanche onset voltage; ensures reliable triggering without premature conduction during transients.
V_C @ I_PP	13.6 V @ 36.7 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress below 15 V absolute max ratings.
P_PP	500 W - Peak pulse power handling capability; sustains 36.7 A surges without failure per standardized waveform.
I_D @ V_WM	<1 µA - Ultra-low leakage current; avoids measurable power loss or bias shift in high-impedance sensing circuits.
Package	DO-214AC (SMA) - Industry-standard surface-mount outline with wide leads for thermal conduction and mechanical robustness.
RoHS	e3 suffix - Matte-tin plating compliant with EU Directive 2011/65/EU; no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE.

Pinout & Package

DO-214AC (SMA) package with cathode-indicated banded end; void-free thermosetting epoxy body (UL94V-0), C-bend leads, and 0.064 g mass. Mounting requires recommended pad layout per Microsemi MSC0270A Rev L (Page 5): 2.57–2.79 mm width (C), 4.93–5.48 mm length (D), 1.98–3.05 mm terminal spacing (E).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Low-side reference node	Connected to ground or return path; carries full surge current to earth during clamping event.
Cathode	Protected line input	Banded terminal connected to line under protection (e.g., 5 V rail); blocks forward current but avalanches in reverse.

Key Features

Feature	Design Value
500 W peak pulse rating	Enables single-device protection against IEC61000-4-5 secondary lightning surges (Class 4, 12 Ω source) without derating or parallel staging.
13.6 V clamping at 36.7 A	Keeps protected 5 V logic rails within safe operating area of 3.3 V/5 V microcontrollers and interface ICs during worst-case transients.
<1 µA standby leakage	Preserves battery life in always-on systems and avoids false triggering in high-gain analog front-ends.
DO-214AC surface-mount package	Supports high-volume automated placement and reflow; compatible with legacy P5KE axial-leaded equivalents via adapter footprints.
IEC61000-4-2/4-4/4-5 compliance	Validated performance for ESD, electrical fast transients, and induced lightning surges-reducing need for system-level validation effort.

Applications

Industrial Power Supply Input Protection	Automotive Body Control Module (BCM)
Use Scenario: 12 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp positive-going transients before they reach upstream DC/DC converter. Use Value: Limits voltage excursion to ≤13.6 V during 36.7 A surges, preventing damage to 16 V-rated input capacitors and MOSFET gate oxides.	Use Scenario: LIN bus line protection in door module where ESD events occur during window switch actuation. IC Role / Device Role / Timing Role: Line-side TVS on LIN transceiver V_IO pin to absorb ±8 kV contact ESD per IEC61000-4-2 without disrupting 19.2 kbps signaling. Use Value: Sub-100 ps response ensures clamping occurs before LIN transceiver internal ESD structures fail, preserving communication integrity.
USB 2.0 Data Line Protection	Telecom DSL Line Interface
Use Scenario: D+ and D− lines of embedded USB host port subjected to hot-plug ESD and cable-induced RF. IC Role / Device Role / Timing Role: Dual unidirectional TVS array (one per line) referenced to 3.3 V supply, leveraging low capacitance and fast response. Use Value: Clamps transients to <15 V while adding <100 pF capacitance-maintaining signal rise/fall times within USB 2.0 specification (≤12 ns).	Use Scenario: Primary-side protection of ADSL line driver IC against lightning-induced surges on twisted-pair telephone line. IC Role / Device Role / Timing Role: First-stage TVS on line side of isolation transformer, absorbing energy before it reaches transformer windings and driver amplifier. Use Value: Withstands 500 W surges per IEC61000-4-5 (42 Ω source, Class 1), reducing transformer insulation stress and extending service life.

Industrial Power Supply Input Protection

Automotive Body Control Module (BCM)

Use Scenario: 12 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching noise.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp positive-going transients before they reach upstream DC/DC converter.

Use Value: Limits voltage excursion to ≤13.6 V during 36.7 A surges, preventing damage to 16 V-rated input capacitors and MOSFET gate oxides.

Use Scenario: LIN bus line protection in door module where ESD events occur during window switch actuation.

IC Role / Device Role / Timing Role: Line-side TVS on LIN transceiver V_IO pin to absorb ±8 kV contact ESD per IEC61000-4-2 without disrupting 19.2 kbps signaling.

Use Value: Sub-100 ps response ensures clamping occurs before LIN transceiver internal ESD structures fail, preserving communication integrity.

USB 2.0 Data Line Protection

Telecom DSL Line Interface

Use Scenario: D+ and D− lines of embedded USB host port subjected to hot-plug ESD and cable-induced RF.

IC Role / Device Role / Timing Role: Dual unidirectional TVS array (one per line) referenced to 3.3 V supply, leveraging low capacitance and fast response.

Use Value: Clamps transients to <15 V while adding <100 pF capacitance-maintaining signal rise/fall times within USB 2.0 specification (≤12 ns).

Use Scenario: Primary-side protection of ADSL line driver IC against lightning-induced surges on twisted-pair telephone line.

IC Role / Device Role / Timing Role: First-stage TVS on line side of isolation transformer, absorbing energy before it reaches transformer windings and driver amplifier.

Use Value: Withstands 500 W surges per IEC61000-4-5 (42 Ω source, Class 1), reducing transformer insulation stress and extending service life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ8.0A	No e3 RoHS suffix; SnPb terminations; same electrical specs and DO-214AC package.	Not suitable for new RoHS-compliant designs; requires Pb-containing solder process.	Select SMAJ8.0A only for legacy repair or non-RoHS programs where SnPb assembly is mandated.
SMAJ8.0CA	Bidirectional variant; symmetrical V_BR = 8.89 V in both polarities; same V_C and P_PP.	Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN); not usable on DC rails with polarity-sensitive loads.	Choose SMAJ8.0CA only when protecting balanced differential pairs or AC signals; SMAJ8.0AE3/TR13 remains optimal for unidirectional DC rails.

Compared with SMAJ8.0A and SMAJ8.0CA, the SMAJ8.0AE3/TR13 provides RoHS-compliant matte-tin terminations for lead-free reflow, maintains unidirectional polarity for DC rail protection, and delivers identical 500 W surge capability-making it the preferred choice for new industrial and automotive designs requiring regulatory compliance and simplified BOM management.

Availability

SMAJ8.0AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, USB interface protection, and telecom line interfaces requiring stable component supply across extended production lifecycles.

Supply support for SMAJ8.0AE3/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, industrial, and communications markets.

The SMAJ series was developed for robust, surface-mount transient suppression in harsh environments-targeting applications demanding high surge immunity, long-term reliability, and compliance with IEC61000-4-x standards.

FAQ

What is the clamping voltage of SMAJ8.0AE3/TR13 at its rated peak pulse current?

The SMAJ8.0AE3/TR13 has a maximum clamping voltage (V_C) of 13.6 V when subjected to its rated peak pulse current of 36.7 A under the standard 10/1000 µs waveform. This value is measured per Microsemi MSC0270A Rev L and ensures protected circuitry remains within safe voltage limits during surge events. The SMAJ8.0AE3/TR13 achieves this clamping performance while maintaining low leakage and fast response.

Is SMAJ8.0AE3/TR13 RoHS compliant and what does the 'e3' suffix indicate?

Yes, SMAJ8.0AE3/TR13 is RoHS compliant-the 'e3' suffix denotes matte-tin plating per EU Directive 2011/65/EU, with no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE. This plating meets MIL-STD-750 Method 2026 for solderability and supports lead-free reflow profiles up to 260 °C for 10 s. The SMAJ8.0AE3/TR13 is certified for use in environmentally regulated industrial and automotive applications.

Can SMAJ8.0AE3/TR13 be used for IEC61000-4-5 Class 4 lightning surge protection?

Yes, SMAJ8.0AE3/TR13 is rated for IEC61000-4-5 Class 4 secondary lightning protection with a 12 Ω source impedance, covering devices from SMAJ5.0 to SMAJ12A or CA per Microsemi documentation. Its 500 W peak pulse power and 13.6 V clamping enable effective suppression of 1 kV open-circuit surges on 5–12 V DC rails. The SMAJ8.0AE3/TR13 is validated for this class without external derating or additional components.

What is the thermal resistance and power dissipation capability of SMAJ8.0AE3/TR13?

SMAJ8.0AE3/TR13 has a junction-to-lead thermal resistance of 15 °C/W and delivers 1.56 W steady-state power dissipation at 25 °C ambient on FR4 with 1 oz Cu and recommended footprint. At 75 °C lead temperature, it sustains 5 W. These values are defined in Microsemi MSC0270A Rev L and ensure reliable operation in thermally constrained PCB layouts. The SMAJ8.0AE3/TR13 leverages wide DO-214AC leads for efficient heat transfer.

How does SMAJ8.0AE3/TR13 differ from the bidirectional SMAJ8.0CA variant?

SMAJ8.0AE3/TR13 is unidirectional with cathode band marking and conducts only in reverse avalanche mode, while SMAJ8.0CA is bidirectional with symmetrical breakdown in both polarities and no polarity marking. Their clamping voltage (13.6 V), peak power (500 W), and package are identical-but SMAJ8.0AE3/TR13 is intended for DC rail protection, whereas SMAJ8.0CA suits AC or differential signal lines like RS-485. Selecting SMAJ8.0AE3/TR13 avoids unnecessary cost and complexity in unidirectional applications.

SMAJ8.0AE3/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):: 8V

Voltage - Breakdown (Min):: 8.89V

Voltage - Clamping (Max) @ Ipp:: 13.6V

Current - Peak Pulse (10/1000µs):: 36.7A

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)

SMAJ8.0AE3/TR13 FAQ

1.How can I place an order for SMAJ8.0AE3/TR13 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMAJ8.0AE3/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 SMAJ8.0AE3/TR13 reliable?

The price and inventory of SMAJ8.0AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ8.0AE3/TR13 is usually 5 days.

3.What payment methods are accepted for SMAJ8.0AE3/TR13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0AE3/TR13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMAJ8.0AE3/TR13?

SMAJ8.0AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMAJ8.0AE3/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 SMAJ8.0AE3/TR13?

For technical support, including SMAJ8.0AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0AE3/TR13 requirements.

6.How does Aetrix verify that SMAJ8.0AE3/TR13 is sourced from the original manufacturer or authorized distributors?

All SMAJ8.0AE3/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 SMAJ8.0AE3/TR13 meets industry standards.

7.What is the process for return or replacement of SMAJ8.0AE3/TR13?

All SMAJ8.0AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0AE3/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 SMAJ8.0AE3/TR13 part is unused and in its original packaging.

Return procedure for SMAJ8.0AE3/TR13:

1.Submit a request within 90 days.

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

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